COVER INFORMATION Station: VLA1 (Code Y ) Experiment: Polarimetric monitoring of the jet in NRAO 150 Exp. Code: BA071C Schedule Version: 1.00 Processed by SCHED version: 6.01 Release: Late March 2005 PI: Ivan Agudo Address: Max-Planck-Institut fuer Radioastronomie MPIfR Auf dem Huegel 69 D-53121 Bonn / Germany Phone: 49-228-525-217 EMAIL: iagudo@mpifr-bonn.mpg.de Fax: 49-228-525-229 Phone during observation: Observing mode: VLBA 128-4-2: 2/1.3/0.7 cm dual-pol Notes: Fringe Finder: NRAO150 PA and Gain calibrators: OJ287, 0716+714 and DA193 Schedule for VLA1 (Code Y ) Page 2 Polarimetric monitoring of the jet in NRAO 150 UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Sat 2 Apr 2005 Day 92 --- Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 Next scan bandwidths: 8.00 8.00 8.00 8.00 16 28 01 0716+714 22 02 01 19.1 12.5 -9.3 -34.2 0 1 1 0 16 28 01 16 31 00 --- 22 05 01 19.3 12.8 -9.3 -34.8 180 F 1 1197 Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 16 31 15 0716+714 22 05 16 19.3 12.8 -9.3 -34.9 0 1 1 1197 16 31 00 16 38 14 --- 22 12 16 19.6 13.3 -9.2 -36.4 419 F 1 4089 Next scan frequencies: 43209.49 43209.49 43217.49 43217.49 Next BBC frequencies: 619.59 619.59 627.59 627.59 16 38 29 0716+714 22 12 31 19.6 13.3 -9.2 -36.4 0 1 1 4089 16 38 14 16 47 28 --- 22 21 31 20.0 13.9 -9.0 -38.4 539 F 1 7780 Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 16 48 31 NRAO150 22 22 35 29.1 45.8 -5.6 -70.7 0 1 1 7780 16 48 31 16 52 30 --- 22 26 35 29.7 46.1 -5.6 -71.3 239 F 1 9375 Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 16 52 45 NRAO150 22 26 50 29.8 46.1 -5.6 -71.4 0 1 1 9375 16 52 30 17 00 44 --- 22 34 50 31.0 46.5 -5.4 -72.7 479 F 1 12667 Next scan frequencies: 43209.49 43209.49 43217.49 43217.49 Next BBC frequencies: 619.59 619.59 627.59 627.59 17 00 59 NRAO150 22 35 05 31.0 46.5 -5.4 -72.7 0 1 1 12667 17 00 44 17 10 57 --- 22 45 05 32.5 47.1 -5.2 -74.4 598 F 1 16757 Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 17 11 12 NRAO150 22 45 20 32.6 47.1 -5.2 -74.5 0 1 2 16757 17 11 12 17 15 12 --- 22 49 20 33.2 47.3 -5.2 -75.1 239 R 1 15162 Schedule for VLA1 (Code Y ) Page 3 Polarimetric monitoring of the jet in NRAO 150 UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Sat 2 Apr 2005 Day 92 --- Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 17 15 27 NRAO150 22 49 35 33.2 47.3 -5.2 -75.2 0 1 2 15162 17 15 12 17 23 26 --- 22 57 35 34.4 47.7 -5.0 -76.5 479 R 1 11870 Next scan frequencies: 43209.49 43209.49 43217.49 43217.49 Next BBC frequencies: 619.59 619.59 627.59 627.59 17 23 41 NRAO150 22 57 50 34.5 47.7 -5.0 -76.6 0 1 2 11870 17 23 26 17 33 39 --- 23 07 50 36.0 48.1 -4.9 -78.3 598 R 1 7780 Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 17 33 54 NRAO150 23 08 06 36.0 48.1 -4.9 -78.3 0 1 2 7780 17 33 39 17 37 54 --- 23 12 06 36.7 48.3 -4.8 -79.0 239 R 1 6083 Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 17 38 09 NRAO150 23 12 21 36.7 48.3 -4.8 -79.0 0 1 2 6083 17 37 54 17 46 07 --- 23 20 21 37.9 48.5 -4.7 -80.4 479 R 1 2791 Next scan frequencies: 43209.49 43209.49 43217.49 43217.49 Next BBC frequencies: 619.59 619.59 627.59 627.59 17 46 22 NRAO150 23 20 36 38.0 48.6 -4.7 -80.5 0 1 3 2791 17 46 22 17 56 21 --- 23 30 36 39.5 48.9 -4.5 -82.2 598 F 1 6780 Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 17 57 43 DA193 23 31 59 17.0 53.0 -6.4 -59.5 0 1 3 6780 17 57 43 18 00 43 --- 23 34 59 17.5 53.3 -6.3 -59.9 180 F 1 7977 Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 18 00 58 DA193 23 35 14 17.6 53.4 -6.3 -59.9 0 1 3 7977 18 00 43 18 07 57 --- 23 42 14 18.7 54.1 -6.2 -60.8 419 F 1 10870 Schedule for VLA1 (Code Y ) Page 4 Polarimetric monitoring of the jet in NRAO 150 UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Sat 2 Apr 2005 Day 92 --- Next scan frequencies: 43209.49 43209.49 43217.49 43217.49 Next BBC frequencies: 619.59 619.59 627.59 627.59 18 08 12 DA193 23 42 29 18.8 54.1 -6.2 -60.8 0 1 3 10870 18 07 57 18 17 11 --- 23 51 29 20.3 55.0 -6.1 -62.0 539 F 1 14561 Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 18 18 34 NRAO150 23 52 52 43.0 49.3 -4.1 -86.2 0 1 3 14561 18 18 34 18 22 33 --- 23 56 52 43.6 49.4 -4.0 -87.0 239 F 1 16157 Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 18 22 48 NRAO150 23 57 08 43.7 49.4 -4.0 -87.0 0 1 4 16157 18 22 48 18 30 47 --- 00 05 08 44.9 49.4 -3.9 -88.5 479 R 1 12966 Next scan frequencies: 43209.49 43209.49 43217.49 43217.49 Next BBC frequencies: 619.59 619.59 627.59 627.59 18 31 02 NRAO150 00 05 23 45.0 49.5 -3.9 -88.6 0 1 4 12966 18 30 47 18 41 00 --- 00 15 23 46.6 49.5 -3.7 -90.5 598 R 1 8876 Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 18 41 15 NRAO150 00 15 38 46.6 49.5 -3.7 -90.6 0 1 4 8876 18 41 00 18 45 15 --- 00 19 38 47.2 49.5 -3.7 -91.3 239 R 1 7179 Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 18 45 30 NRAO150 00 19 53 47.3 49.5 -3.7 -91.4 0 1 4 7179 18 45 15 18 53 29 --- 00 27 53 48.5 49.4 -3.5 -93.0 479 R 1 3887 Next scan frequencies: 43209.49 43209.49 43217.49 43217.49 Next BBC frequencies: 619.59 619.59 627.59 627.59 18 53 44 NRAO150 00 28 08 48.6 49.4 -3.5 -93.0 0 1 5 3887 18 53 44 19 03 42 --- 00 38 08 50.1 49.2 -3.4 -95.1 598 F 1 7876 Schedule for VLA1 (Code Y ) Page 5 Polarimetric monitoring of the jet in NRAO 150 UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Sat 2 Apr 2005 Day 92 --- Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 19 03 57 NRAO150 00 38 23 50.2 49.2 -3.4 -95.2 0 1 5 7876 19 03 42 19 07 57 --- 00 42 23 50.8 49.1 -3.3 -96.0 239 F 1 9573 Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 19 08 12 NRAO150 00 42 38 50.8 49.1 -3.3 -96.1 0 1 5 9573 19 07 57 19 16 10 --- 00 50 38 52.1 48.9 -3.2 -97.8 479 F 1 12865 Next scan frequencies: 43209.49 43209.49 43217.49 43217.49 Next BBC frequencies: 619.59 619.59 627.59 627.59 19 16 25 NRAO150 00 50 54 52.1 48.8 -3.1 -97.9 0 1 5 12865 19 16 10 19 26 24 --- 01 00 54 53.7 48.4 -3.0 -100.1 598 F 1 16955 Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 19 27 48 0716+714 01 02 18 30.5 21.7 -6.3 -73.3 0 1 6 16955 19 27 48 19 30 48 --- 01 05 18 30.7 21.8 -6.3 -73.9 180 R 1 15758 Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 19 31 03 0716+714 01 05 34 30.8 21.8 -6.3 -74.0 0 1 6 15758 19 30 48 19 38 02 --- 01 12 34 31.3 22.0 -6.2 -75.5 419 R 1 12865 Next scan frequencies: 43209.49 43209.49 43217.49 43217.49 Next BBC frequencies: 619.59 619.59 627.59 627.59 19 38 17 0716+714 01 12 49 31.3 22.0 -6.2 -75.6 0 1 6 12865 19 38 02 19 47 15 --- 01 21 49 32.0 22.2 -6.0 -77.6 539 R 1 9175 Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 19 48 46 NRAO150 01 23 19 57.1 47.0 -2.6 -105.6 0 1 6 9175 19 48 46 19 52 45 --- 01 27 19 57.7 46.7 -2.5 -106.7 239 R 1 7579 Schedule for VLA1 (Code Y ) Page 6 Polarimetric monitoring of the jet in NRAO 150 UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Sat 2 Apr 2005 Day 92 --- Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 19 53 00 NRAO150 01 27 34 57.8 46.7 -2.5 -106.8 0 1 6 7579 19 52 45 20 00 59 --- 01 35 34 59.0 46.0 -2.4 -108.9 479 R 1 4287 Next scan frequencies: 43209.49 43209.49 43217.49 43217.49 Next BBC frequencies: 619.59 619.59 627.59 627.59 20 01 14 NRAO150 01 35 50 59.0 45.9 -2.4 -109.0 0 1 6 4287 20 00 59 20 11 12 --- 01 45 50 60.5 44.8 -2.2 -111.9 598 R 1 197 Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 20 11 27 NRAO150 01 46 05 60.5 44.8 -2.2 -112.0 0 1 7 197 20 11 27 20 15 27 --- 01 50 05 61.1 44.3 -2.2 -113.2 239 F 1 1793 Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 20 15 42 NRAO150 01 50 20 61.1 44.3 -2.2 -113.3 0 1 7 1793 20 15 27 20 23 41 --- 01 58 20 62.3 43.2 -2.0 -115.8 479 F 1 5085 Next scan frequencies: 43209.49 43209.49 43217.49 43217.49 Next BBC frequencies: 619.59 619.59 627.59 627.59 20 23 56 NRAO150 01 58 35 62.3 43.1 -2.0 -115.9 0 1 7 5085 20 23 41 20 33 54 --- 02 08 35 63.7 41.5 -1.9 -119.2 598 F 1 9175 Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 20 35 23 DA193 02 10 04 45.3 65.4 -3.8 -78.8 19 1 7 9175 20 35 23 20 38 23 --- 02 13 04 45.8 65.6 -3.7 -79.1 180 F 1 10371 Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 20 38 38 DA193 02 13 20 45.9 65.6 -3.7 -79.2 0 1 7 10371 20 38 23 20 45 37 --- 02 20 20 47.2 66.0 -3.6 -80.0 419 F 1 13265 Schedule for VLA1 (Code Y ) Page 7 Polarimetric monitoring of the jet in NRAO 150 UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Sat 2 Apr 2005 Day 92 --- Next scan frequencies: 43209.49 43209.49 43217.49 43217.49 Next BBC frequencies: 619.59 619.59 627.59 627.59 20 45 52 DA193 02 20 35 47.3 66.0 -3.6 -80.1 0 1 7 13265 20 45 37 20 54 51 --- 02 29 35 49.0 66.4 -3.4 -81.2 539 F 1 16956 Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 20 56 32 NRAO150 02 31 17 66.7 36.8 -1.5 -127.9 33 1 8 16956 20 56 32 21 00 31 --- 02 35 17 67.2 35.8 -1.4 -129.6 239 R 1 15360 Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 21 00 46 NRAO150 02 35 32 67.2 35.8 -1.4 -129.7 0 1 8 15360 21 00 31 21 08 45 --- 02 43 32 68.1 33.6 -1.3 -133.3 479 R 1 12068 Next scan frequencies: 43209.49 43209.49 43217.49 43217.49 Next BBC frequencies: 619.59 619.59 627.59 627.59 21 09 00 NRAO150 02 43 47 68.2 33.5 -1.3 -133.4 0 1 8 12068 21 08 45 21 18 59 --- 02 53 47 69.3 30.4 -1.1 -138.3 598 R 1 7978 Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 21 19 14 NRAO150 02 54 02 69.3 30.3 -1.1 -138.4 0 1 8 7978 21 18 59 21 23 13 --- 02 58 02 69.7 28.9 -1.0 -140.5 239 R 1 6282 Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 21 23 28 NRAO150 02 58 17 69.7 28.8 -1.0 -140.6 0 1 8 6282 21 23 13 21 31 27 --- 03 06 17 70.5 25.9 -0.9 -144.9 479 R 1 2990 Next scan frequencies: 43209.49 43209.49 43217.49 43217.49 Next BBC frequencies: 619.59 619.59 627.59 627.59 21 31 42 NRAO150 03 06 32 70.5 25.8 -0.9 -145.1 0 1 9 2990 21 31 42 21 41 40 --- 03 16 32 71.4 21.7 -0.7 -150.9 598 F 1 6979 Schedule for VLA1 (Code Y ) Page 8 Polarimetric monitoring of the jet in NRAO 150 UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Sat 2 Apr 2005 Day 92 --- Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 21 43 26 0716+714 03 18 18 41.2 21.9 -4.1 -105.5 0 1 9 6979 21 43 26 21 46 25 --- 03 21 18 41.5 21.8 -4.0 -106.2 180 F 1 8176 Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 21 46 40 0716+714 03 21 33 41.5 21.8 -4.0 -106.3 0 1 9 8176 21 46 25 21 53 39 --- 03 28 33 42.0 21.5 -3.9 -108.1 419 F 1 11068 Next scan frequencies: 43209.49 43209.49 43217.49 43217.49 Next BBC frequencies: 619.59 619.59 627.59 627.59 21 53 54 0716+714 03 28 48 42.0 21.5 -3.9 -108.2 0 1 9 11068 21 53 39 22 02 53 --- 03 37 48 42.7 21.2 -3.7 -110.5 539 F 1 14759 Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 22 04 38 NRAO150 03 39 34 72.7 10.8 -0.3 -165.7 0 1 9 14759 22 04 38 22 08 37 --- 03 43 34 72.8 8.7 -0.3 -168.5 239 F 1 16354 Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 22 08 52 NRAO150 03 43 49 72.8 8.6 -0.3 -168.7 0 1 10 16354 22 08 52 22 16 51 --- 03 51 49 73.0 4.3 -0.1 -174.3 479 R 1 13163 Next scan frequencies: 43209.49 43209.49 43217.49 43217.49 Next BBC frequencies: 619.59 619.59 627.59 627.59 22 17 06 NRAO150 03 52 04 73.0 4.2 -0.1 -174.5 0 1 10 13163 22 16 51 22 27 05 --- 04 02 04 73.1 -1.2 0.0 178.4 598 R 1 9073 Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 22 29 43 OJ287 04 04 43 25.2 81.9 -4.8 -60.8 0 1 10 9073 22 29 43 22 33 43 --- 04 08 43 26.0 82.4 -4.8 -61.0 239 R 1 7477 Schedule for VLA1 (Code Y ) Page 9 Polarimetric monitoring of the jet in NRAO 150 UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Sat 2 Apr 2005 Day 92 --- Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 22 33 58 OJ287 04 08 58 26.0 82.5 -4.8 -61.0 0 1 10 7477 22 33 43 22 41 56 --- 04 16 58 27.7 83.5 -4.6 -61.2 479 R 1 4185 Next scan frequencies: 43209.49 43209.49 43217.49 43217.49 Next BBC frequencies: 619.59 619.59 627.59 627.59 22 42 12 OJ287 04 17 14 27.7 83.5 -4.6 -61.2 0 1 10 4185 22 41 56 22 52 10 --- 04 27 14 29.8 84.8 -4.5 -61.4 598 R 1 95 Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 22 54 56 NRAO150 04 30 00 72.2 -15.7 0.5 159.1 0 1 11 95 22 54 56 22 58 55 --- 04 34 00 72.0 -17.6 0.6 156.6 239 F 1 1690 Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 22 59 10 NRAO150 04 34 15 72.0 -17.7 0.6 156.4 0 1 11 1690 22 58 55 23 07 09 --- 04 42 15 71.4 -21.3 0.7 151.4 479 F 1 4983 Next scan frequencies: 43209.49 43209.49 43217.49 43217.49 Next BBC frequencies: 619.59 619.59 627.59 627.59 23 07 24 NRAO150 04 42 30 71.4 -21.4 0.7 151.3 0 1 11 4983 23 07 09 23 17 22 --- 04 52 30 70.6 -25.5 0.9 145.4 598 F 1 9073 Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 23 20 18 DA193 04 55 26 76.7 60.1 -1.0 -110.7 32 1 11 9073 23 20 18 23 23 18 --- 04 58 26 77.2 59.2 -1.0 -112.1 180 F 1 10270 Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 23 23 33 DA193 04 58 42 77.2 59.1 -1.0 -112.2 0 1 11 10270 23 23 18 23 30 32 --- 05 05 42 78.5 56.5 -0.8 -115.9 419 F 1 13163 Schedule for VLA1 (Code Y ) Page 10 Polarimetric monitoring of the jet in NRAO 150 UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Sat 2 Apr 2005 Day 92 --- Next scan frequencies: 43209.49 43209.49 43217.49 43217.49 Next BBC frequencies: 619.59 619.59 627.59 627.59 23 30 47 DA193 05 05 57 78.5 56.4 -0.8 -116.1 0 1 11 13163 23 30 32 23 39 45 --- 05 14 57 80.0 51.9 -0.7 -121.9 539 F 1 16854 Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 23 42 09 NRAO150 05 17 21 68.0 -33.9 1.3 132.8 0 1 12 16854 23 42 09 23 46 08 --- 05 21 21 67.5 -35.0 1.4 131.0 239 R 1 15259 Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 23 46 24 NRAO150 05 21 36 67.5 -35.1 1.4 130.9 0 1 12 15259 23 46 08 23 54 22 --- 05 29 36 66.5 -37.1 1.5 127.4 479 R 1 11967 --- Start: Sat 2 Apr 2005 Day 92 -- Stop: Sun 3 Apr 2005 Day 93 --- Next scan frequencies: 43209.49 43209.49 43217.49 43217.49 Next BBC frequencies: 619.59 619.59 627.59 627.59 23 54 37 NRAO150 05 29 51 66.5 -37.2 1.5 127.3 0 1 12 11967 23 54 22 00 04 36 --- 05 39 51 65.2 -39.4 1.7 123.4 598 R 1 7877 Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 00 08 13 OJ287 05 43 29 45.6 95.6 -3.2 -61.4 0 1 12 7877 00 08 13 00 12 13 --- 05 47 29 46.4 96.2 -3.1 -61.2 239 R 1 6281 Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 00 12 28 OJ287 05 47 44 46.4 96.3 -3.1 -61.2 0 1 12 6281 00 12 13 00 20 26 --- 05 55 44 48.1 97.6 -3.0 -60.9 479 R 1 2989 Next scan frequencies: 43209.49 43209.49 43217.49 43217.49 Next BBC frequencies: 619.59 619.59 627.59 627.59 00 20 42 OJ287 05 56 00 48.1 97.7 -3.0 -60.9 0 1 13 2989 00 20 42 00 30 40 --- 06 06 00 50.2 99.4 -2.8 -60.5 598 F 1 6978 Schedule for VLA1 (Code Y ) Page 11 Polarimetric monitoring of the jet in NRAO 150 UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Sun 3 Apr 2005 Day 93 --- Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 00 34 31 NRAO150 06 09 51 61.1 -44.3 2.2 113.1 0 1 13 6978 00 34 31 00 38 30 --- 06 13 51 60.5 -44.8 2.2 111.9 239 F 1 8574 Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 00 38 45 NRAO150 06 14 06 60.4 -44.9 2.2 111.8 0 1 13 8574 00 38 30 00 46 44 --- 06 22 06 59.3 -45.8 2.4 109.5 479 F 1 11866 Next scan frequencies: 43209.49 43209.49 43217.49 43217.49 Next BBC frequencies: 619.59 619.59 627.59 627.59 00 46 59 NRAO150 06 22 21 59.2 -45.8 2.4 109.4 0 1 13 11866 00 46 44 00 56 57 --- 06 32 21 57.7 -46.7 2.5 106.7 598 F 1 15956 Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 00 57 12 NRAO150 06 32 36 57.7 -46.7 2.5 106.6 0 1 13 15956 00 56 57 01 01 12 --- 06 36 36 57.1 -47.1 2.6 105.6 239 F 1 17652 Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 01 01 27 NRAO150 06 36 52 57.0 -47.1 2.6 105.5 0 1 14 17652 01 01 27 01 09 25 --- 06 44 52 55.8 -47.7 2.8 103.5 479 R 1 14461 Next scan frequencies: 43209.49 43209.49 43217.49 43217.49 Next BBC frequencies: 619.59 619.59 627.59 627.59 01 09 41 NRAO150 06 45 07 55.8 -47.7 2.8 103.4 0 1 14 14461 01 09 25 01 19 39 --- 06 55 07 54.3 -48.3 2.9 101.0 598 R 1 10371 Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 01 22 44 DA193 06 58 12 76.3 -60.7 1.0 109.9 104 1 14 10371 01 22 44 01 25 43 --- 07 01 12 75.8 -61.5 1.1 108.7 180 R 1 9174 Schedule for VLA1 (Code Y ) Page 12 Polarimetric monitoring of the jet in NRAO 150 UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Sun 3 Apr 2005 Day 93 --- Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 01 25 58 DA193 07 01 27 75.7 -61.5 1.1 108.5 0 1 14 9174 01 25 43 01 32 57 --- 07 08 27 74.4 -63.1 1.2 105.9 419 R 1 6281 Next scan frequencies: 43209.49 43209.49 43217.49 43217.49 Next BBC frequencies: 619.59 619.59 627.59 627.59 01 33 12 DA193 07 08 42 74.4 -63.1 1.2 105.8 0 1 14 6281 01 32 57 01 42 11 --- 07 17 42 72.7 -64.7 1.4 102.9 539 R 1 2590 Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 01 43 32 NRAO150 07 19 04 50.5 -49.1 3.3 95.6 0 1 14 2590 01 43 32 01 47 32 --- 07 23 04 49.9 -49.2 3.4 94.8 239 R 1 994 ----------- Tape Change ------------ Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 01 47 47 NRAO150 07 23 19 49.9 -49.2 3.4 94.8 0 1 1 0 01 47 47 01 55 46 --- 07 31 19 48.6 -49.4 3.5 93.1 479 F 1 3191 Next scan frequencies: 43209.49 43209.49 43217.49 43217.49 Next BBC frequencies: 619.59 619.59 627.59 627.59 01 56 01 NRAO150 07 31 35 48.6 -49.4 3.5 93.0 0 1 1 3191 01 55 46 02 05 59 --- 07 41 35 47.0 -49.5 3.7 91.0 598 F 1 7281 Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 02 10 40 OJ287 07 46 17 69.3 128.1 -1.1 -43.9 0 1 1 7281 02 10 40 02 14 40 --- 07 50 17 70.0 130.1 -1.1 -42.4 239 F 1 8877 Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 02 14 55 OJ287 07 50 32 70.0 130.2 -1.1 -42.3 0 1 1 8877 02 14 40 02 22 54 --- 07 58 32 71.2 134.5 -0.9 -39.0 479 F 1 12169 Schedule for VLA1 (Code Y ) Page 13 Polarimetric monitoring of the jet in NRAO 150 UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Sun 3 Apr 2005 Day 93 --- Next scan frequencies: 43209.49 43209.49 43217.49 43217.49 Next BBC frequencies: 619.59 619.59 627.59 627.59 02 23 09 OJ287 07 58 47 71.3 134.7 -0.9 -38.8 0 1 1 12169 02 22 54 02 33 07 --- 08 08 47 72.7 140.8 -0.8 -33.9 598 F 1 16260 Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 02 37 37 NRAO150 08 13 18 42.0 310.8 4.2 85.0 0 1 2 16260 02 37 37 02 41 37 --- 08 17 18 41.4 310.9 4.3 84.3 239 R 1 14664 Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 02 41 52 NRAO150 08 17 33 41.3 310.9 4.3 84.3 0 1 2 14664 02 41 37 02 49 50 --- 08 25 33 40.1 311.0 4.4 82.8 479 R 1 11372 Next scan frequencies: 43209.49 43209.49 43217.49 43217.49 Next BBC frequencies: 619.59 619.59 627.59 627.59 02 50 06 NRAO150 08 25 48 40.0 311.1 4.4 82.8 0 1 2 11372 02 49 50 03 00 04 --- 08 35 48 38.5 311.3 4.6 81.0 598 R 1 7282 Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 03 01 16 DA193 08 37 01 57.6 292.1 2.7 87.2 0 1 2 7282 03 01 16 03 04 16 --- 08 40 01 57.0 292.2 2.7 86.8 180 R 1 6086 Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 03 04 31 DA193 08 40 16 57.0 292.2 2.7 86.8 0 1 2 6086 03 04 16 03 11 30 --- 08 47 16 55.6 292.4 2.9 85.8 419 R 1 3192 Next scan frequencies: 43209.49 43209.49 43217.49 43217.49 Next BBC frequencies: 619.59 619.59 627.59 627.59 03 11 45 DA193 08 47 31 55.6 292.4 2.9 85.8 0 1 3 3192 03 11 45 03 20 43 --- 08 56 31 53.8 292.6 3.0 84.5 539 F 1 6782 Schedule for VLA1 (Code Y ) Page 14 Polarimetric monitoring of the jet in NRAO 150 UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Sun 3 Apr 2005 Day 93 --- Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 632.41 632.41 624.41 624.41 03 22 22 0716+714 08 58 10 50.6 348.2 1.6 148.0 0 1 3 6782 03 22 22 03 25 21 --- 09 01 10 50.5 347.9 1.6 147.1 180 F 1 7979 Next scan frequencies: 22225.49 22225.49 22233.49 22233.49 Next BBC frequencies: 615.39 615.39 623.39 623.39 03 25 36 0716+714 09 01 25 50.5 347.9 1.6 147.0 0 1 3 7979 03 25 21 03 32 35 --- 09 08 25 50.2 347.1 1.8 144.8 419 F 1 10872 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: /home/filehost/cwalker/sched/setups/v2cm-128-4-2.set Matches group y_vu in /home/filehost/cwalker/sched/catalogs/freq.dat Setup group: 11 Station: VLA1 Total bit rate: 128 Format: VLBA1:4 Bits per sample: 2 Sample rate: 16.000 Number of channels: 4 Passes/head pos: 1 Speedup factor: 2.00 Tape speeds: Low density - 133.330 ips, High density - 80.00 ips Time per pass for 17600 ft, High density tapes is: 00:44:00 1st LO= 15989.90 15989.90 15989.90 15989.90 Net SB= U U U U Pol. = RCP LCP RCP LCP BBC = 1 2 3 4 BBC SB= L L L L IF = A C A C The following frequency sets based on this setup were used. Frequency Set: 10 Setup file default. Used pcal sets: 1 LO sum= 15357.49 15357.49 15365.49 15365.49 BBC fr= 632.41 632.41 624.41 624.41 Bandwd= 8.000 8.000 8.000 8.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 1 PCAL = 1MHZ PCALXB1= S1 S3 S1 S3 S1 S2 S3 S4 PCALXB2= S2 S4 S2 S4 M1 M2 M3 M4 PCALFR1= 510 510 6510 6510 0 0 0 0 PCALFR2= 510 510 6510 6510 0 0 0 0 Track assignments are: track1= 2, 18, 3, 19 barrel=roll_auto VLA specific information: (LO and FI cards not needed. Defaults shown.) VLABAND: VU VLABW: 0000 FEFILTER: 0000 VLAFEAB: 19.90 VLAFECD: 19.90 VLAIF: SYSUIF VLASYNA: 3510.10 VLASYNB: 3510.10 VLAROT: VLBUROT FLUKEA: 100.00 FLUKEB: 200.00 FLUKESET: 0 Details for VLA IFs: LO Sum Frequency span VLBI FIRSTLO VLA IF A: 15389.9000 15389.9000-15339.9000 15989.9000 VLA IF B: 15389.9000 15389.9000-15339.9000 15989.9000 VLA IF C: 15389.9000 15389.9000-15339.9000 15989.9000 VLA IF D: 15389.9000 15389.9000-15339.9000 15989.9000 With new digital patch panel, VLA IF = VLB IF. Setup file: /home/filehost/cwalker/sched/setups/v1cm-128-4-2.set Matches group y_vk in /home/filehost/cwalker/sched/catalogs/freq.dat In VA mode, only IFs A and D are phased. Setup group: 22 Station: VLA1 Total bit rate: 128 Format: VLBA1:4 Bits per sample: 2 Sample rate: 16.000 Number of channels: 4 Passes/head pos: 1 Speedup factor: 2.00 Tape speeds: Low density - 133.330 ips, High density - 80.00 ips Time per pass for 17600 ft, High density tapes is: 00:44:00 1st LO= 21610.10 21610.10 21610.10 21610.10 Net SB= U U U U Pol. = RCP LCP RCP LCP BBC = 1 2 3 4 BBC SB= U U U U IF = A C A C The following frequency sets based on this setup were used. Frequency Set: 20 Setup file default. Used pcal sets: 1 LO sum= 22225.49 22225.49 22233.49 22233.49 BBC fr= 615.39 615.39 623.39 623.39 Bandwd= 8.000 8.000 8.000 8.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 1 PCAL = 1MHZ PCALXB1= S1 S3 S1 S3 S1 S2 S3 S4 PCALXB2= S2 S4 S2 S4 M1 M2 M3 M4 PCALFR1= 510 510 6510 6510 0 0 0 0 PCALFR2= 510 510 6510 6510 0 0 0 0 Track assignments are: track1= 2, 18, 3, 19 barrel=roll_auto VLA specific information: (LO and FI cards not needed. Defaults shown.) VLABAND: VK VLABW: 0000 FEFILTER: 0000 VLAFEAB: 17.50 VLAFECD: 17.50 VLAIF: SYSKIF VLASYNA: 3710.10 VLASYNB: 3710.10 VLAROT: VLBKROT FLUKEA: 100.00 FLUKEB: 200.00 FLUKESET: 0 Details for VLA IFs: LO Sum Frequency span VLBI FIRSTLO VLA IF A: 22210.1000 22210.1000-22260.1000 21610.1000 VLA IF B: 22210.1000 22210.1000-22260.1000 21610.1000 VLA IF C: 22210.1000 22210.1000-22260.1000 21610.1000 VLA IF D: 22210.1000 22210.1000-22260.1000 21610.1000 With new digital patch panel, VLA IF = VLB IF. Setup file: /home/filehost/cwalker/sched/setups/v7mm-128-4-2.set Matches group y_43189.9j in /home/filehost/cwalker/sched/catalogs/freq.dat In VA mode, only IFs A and D are phased. Setup group: 33 Station: VLA1 Total bit rate: 128 Format: VLBA1:4 Bits per sample: 2 Sample rate: 16.000 Number of channels: 4 Passes/head pos: 1 Speedup factor: 2.00 Tape speeds: Low density - 133.330 ips, High density - 80.00 ips Time per pass for 17600 ft, High density tapes is: 00:44:00 1st LO= 42589.90 42589.90 42589.90 42589.90 Net SB= U U U U Pol. = RCP LCP RCP LCP BBC = 1 2 3 4 BBC SB= U U U U IF = A C A C The following frequency sets based on this setup were used. Frequency Set: 30 Setup file default. Used pcal sets: 1 LO sum= 43209.49 43209.49 43217.49 43217.49 BBC fr= 619.59 619.59 627.59 627.59 Bandwd= 8.000 8.000 8.000 8.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 1 PCAL = 1MHZ PCALXB1= S1 S3 S1 S3 S1 S2 S3 S4 PCALXB2= S2 S4 S2 S4 M1 M2 M3 M4 PCALFR1= 510 510 6510 6510 0 0 0 0 PCALFR2= 510 510 6510 6510 0 0 0 0 Track assignments are: track1= 2, 18, 3, 19 barrel=roll_auto VLA specific information: (LO and FI cards will be written.) VLABAND: VQ VLABW: 0000 FEFILTER: 0000 VLAFEAB: 51.60 VLAFECD: 13.00 VLAIF: SYSQIF VLASYNA: 3589.90 VLASYNB: 3589.90 VLAROT: VLBQROT FLUKEA: 100.00 FLUKEB: 200.00 FLUKESET: 0 Details for VLA IFs: LO Sum Frequency span VLBI FIRSTLO VLA IF A: 43189.9000 43189.9000-43239.9000 42589.9000 VLA IF B: 43189.9000 43189.9000-43239.9000 42589.9000 VLA IF C: 43189.9000 43189.9000-43239.9000 42589.9000 VLA IF D: 43189.9000 43189.9000-43239.9000 42589.9000 With new digital patch panel, VLA IF = VLB IF. SOURCE LIST -- Polarimetric monitoring of the jet in NRAO 150 Catalog positions marked with *. Precession of date coordinates is based on stop time of first scan. Names used in schedule marked with *. Short names used in VLA and SNAP files marked with +. Observation date used in B1950/J2000 coordinate conversion (PRECDATE): 1979.900 No adjustments are made for rates (DRA, DDEC). Scan hours are for recording scans only. Baseline hours are only counted for scans above horizon at both ends. Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) J0359+5057 03 55 45.261370 * 03 59 29.747271 03 59 51.036624 0.32 0355+508 50 49 20.28577 * 50 57 50.16172 50 58 54.83180 0.40 J0359+50 /home/filehost/cwalker/sched/catalogs/sources.vlba * NRAO150 VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 6.216 scan hours, 327.935 baseline hours above horizon. J0555+3948 05 52 01.407172 * 05 55 30.805614 05 55 51.815365 0.26 0552+398 39 48 21.94585 * 39 48 49.16500 39 49 05.48606 0.40 * DA193 /home/filehost/cwalker/sched/catalogs/sources.vlba J0555+39 VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 1.579 scan hours, 80.345 baseline hours above horizon. J0721+7120 07 16 13.029741 * 07 21 53.448476 07 22 29.243410 0.64 * 0716+714 71 26 15.17405 * 71 20 36.36339 71 20 23.80709 0.40 J0721+71 /home/filehost/cwalker/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 1.114 scan hours, 58.091 baseline hours above horizon. J0854+2006 08 51 57.250617 * 08 54 48.874929 08 55 07.237105 0.21 0851+202 20 17 58.41740 * 20 06 30.64085 20 05 24.21990 0.40 J0854+20 /home/filehost/cwalker/sched/catalogs/sources.vlba * OJ287 VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 1.097 scan hours, 56.013 baseline hours above horizon. The solar corona can cause unstable phases for sources too close to the Sun. SCHED provides warnings at individual scans for distances less than 10 degrees. The distance from the Sun to each source in this schedule is: Source Sun distance (deg) NRAO150 60.5 DA193 76.5 0716+714 87.7 OJ287 117.3 Barry Clark estimates from predictions by Ketan Desai of IPM scattering sizes that the Sun will cause amplitude reductions on the longest VLBA baselines at a solar distance of 60deg F^(-0.6) where F is in GHz. For common VLBI bands, this is: 327 MHz 117. deg 610 MHz 81. deg 1.6 GHz 45. deg 2.3 GHz 36. deg 5.0 GHz 23. deg 8.4 GHz 17. deg 15.0 GHz 12. deg 22.0 GHz 9. deg 43.0 GHz 6. deg