COVER INFORMATION Station: VLBA_OV (Code Ov ) Experiment: SNR/OH(1720 MHz) Masers Toward W44 Exp. Code: BH102H Schedule Version: 2.00 Processed by SCHED version: Release of 02 July 2002 PI: Ian Hoffman Address: National Radio Astronomy Observatory P. O. Box O Socorro, New Mexico, 87801 U.S.A. Phone: 505 835 7093 EMAIL: ihoffman@aoc.nrao.edu Fax: 505 835 7027 Phone during observation: 505 835 7093 Observing mode: 18 cm VLBA non-standard correlator setup Notes: Main science run toward W44 OH 1720 masers 4 baseband channels The fringe finder is 3C345=J1642+3948 High output data rate allowed by TAC Schedule for VLBA_OV (Code Ov ) Page 2 SNR/OH(1720 MHz) Masers Toward W44 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). Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Mon 18 Aug 2003 Day 230 --- Next scan frequencies: 1720.24 1720.24 1720.17 1720.17 1719.17 1719.17 1718.17 1718.17 Next BBC frequencies: 679.76 679.76 679.83 679.83 680.83 680.83 681.83 681.83 Next scan bandwidths: 0.06 0.06 1.00 1.00 1.00 1.00 1.00 1.00 01 30 00 3C286 15 20 56 66.4 261.6 1.8 66.1 0 1 1 0 01 30 00 01 35 00 --- 15 25 57 65.4 262.6 1.9 66.4 300 F 1 1000 01 38 51 J1751+0939 15 29 48 47.8 121.6 -2.4 -43.5 130 1 1 1000 01 38 51 01 43 31 --- 15 34 29 48.6 122.9 -2.3 -42.7 280 F 1 1933 01 46 09 3C345 15 37 08 76.9 73.6 -1.1 -96.1 96 1 1 1933 01 46 09 01 51 09 --- 15 42 09 77.8 73.1 -1.0 -97.4 300 F 1 2933 01 51 09 W44DF 15 42 09 32.7 116.9 -3.2 -45.3 -96 1 1 2933 01 51 09 01 54 09 --- 15 45 09 33.3 117.5 -3.2 -45.0 84 F 1 3533 01 54 09 J1838+0404 15 45 09 38.3 119.1 -2.9 -44.2 -16 1 1 3533 01 54 09 01 56 09 =J1838+04 15 47 09 38.6 119.5 -2.9 -44.0 104 F 1 3933 01 56 09 W44BC 15 47 09 33.6 118.2 -3.2 -44.6 -16 1 1 3933 01 56 09 01 59 09 --- 15 50 10 34.1 118.9 -3.1 -44.2 164 F 1 4533 01 59 09 J1838+0404 15 50 10 39.1 120.2 -2.8 -43.6 -16 1 1 4533 01 59 09 02 01 09 =J1838+04 15 52 10 39.5 120.7 -2.8 -43.3 104 F 1 4933 02 01 09 W44DF 15 52 10 34.5 119.0 -3.1 -44.2 -16 1 1 4933 02 01 09 02 04 09 --- 15 55 11 35.0 119.6 -3.0 -43.8 164 F 1 5533 02 04 09 J1838+0404 15 55 11 40.0 121.4 -2.7 -42.9 -16 1 1 5533 02 04 09 02 06 09 =J1838+04 15 57 11 40.3 121.9 -2.7 -42.7 104 F 1 5933 02 06 09 W44BC 15 57 11 35.3 120.4 -3.0 -43.4 -16 1 1 5933 02 06 09 02 09 09 --- 16 00 11 35.8 121.1 -2.9 -43.0 164 F 1 6533 02 09 09 J1838+0404 16 00 11 40.8 122.6 -2.6 -42.2 -16 1 1 6533 02 09 09 02 11 09 =J1838+04 16 02 12 41.2 123.1 -2.6 -42.0 104 F 1 6933 02 11 09 W44DF 16 02 12 36.2 121.2 -2.9 -42.9 -16 1 1 6933 02 11 09 02 14 09 --- 16 05 12 36.7 121.9 -2.9 -42.5 164 F 1 7533 Schedule for VLBA_OV (Code Ov ) Page 3 SNR/OH(1720 MHz) Masers Toward W44 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). Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Mon 18 Aug 2003 Day 230 --- 02 14 09 J1838+0404 16 05 12 41.7 123.9 -2.6 -41.5 -16 1 1 7533 02 14 09 02 16 09 =J1838+04 16 07 13 42.0 124.4 -2.5 -41.2 104 F 1 7933 02 16 09 W44BC 16 07 13 37.0 122.7 -2.8 -42.1 -16 1 1 7933 02 16 09 02 19 09 --- 16 10 13 37.5 123.4 -2.8 -41.7 164 F 1 8533 02 19 09 J1838+0404 16 10 13 42.5 125.1 -2.5 -40.8 -16 1 1 8533 02 19 09 02 21 09 =J1838+04 16 12 13 42.8 125.6 -2.4 -40.4 104 F 1 8933 02 21 09 W44DF 16 12 13 37.9 123.5 -2.7 -41.6 -16 1 1 8933 02 21 09 02 24 09 --- 16 15 14 38.4 124.3 -2.7 -41.2 164 F 1 9533 02 24 09 J1838+0404 16 15 14 43.3 126.4 -2.4 -40.0 -16 1 1 9533 02 24 09 02 26 09 =J1838+04 16 17 14 43.6 127.0 -2.4 -39.6 104 F 1 9933 02 26 09 W44BC 16 17 14 38.7 125.1 -2.6 -40.7 -16 1 1 9933 02 26 09 02 29 09 --- 16 20 15 39.1 125.8 -2.6 -40.2 164 F 1 10533 02 29 09 J1838+0404 16 20 15 44.1 127.8 -2.3 -39.1 -16 1 1 10533 02 29 09 02 31 09 =J1838+04 16 22 15 44.4 128.3 -2.3 -38.8 104 F 1 10933 02 34 57 3C286 16 26 04 53.4 272.6 2.9 67.4 127 1 1 10933 02 34 57 02 39 57 --- 16 31 05 52.4 273.3 3.0 67.3 300 F 1 11933 02 42 06 3C345 16 33 14 86.8 396.1 -0.2 -142.4 41 1 1 11933 02 42 06 02 47 06 --- 16 38 15 87.3 379.9 -0.1 -159.4 300 F 1 12933 02 50 59 J1751+0939 16 42 09 58.3 145.9 -1.2 -26.9 72 1 1 12933 02 50 59 02 55 39 --- 16 46 50 58.8 147.9 -1.1 -25.4 280 F 1 13867 02 55 39 W44DF 16 46 50 43.4 132.4 -2.2 -36.0 -37 1 1 13867 02 55 39 02 58 39 --- 16 49 50 43.8 133.3 -2.1 -35.4 143 F 1 14467 02 58 39 J1838+0404 16 49 50 48.5 136.4 -1.8 -33.4 -15 1 1 14467 02 58 39 03 00 39 =J1838+04 16 51 51 48.8 137.0 -1.8 -33.0 105 F 1 14867 03 00 39 W44BC 16 51 51 44.0 134.2 -2.1 -34.8 -16 1 1 14867 03 00 39 03 03 39 --- 16 54 51 44.4 135.0 -2.0 -34.2 164 F 1 15467 03 03 39 J1838+0404 16 54 51 49.2 138.0 -1.7 -32.3 -16 1 1 15467 03 03 39 03 05 39 =J1838+04 16 56 52 49.4 138.6 -1.7 -31.9 104 F 1 15867 Schedule for VLBA_OV (Code Ov ) Page 4 SNR/OH(1720 MHz) Masers Toward W44 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). Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Mon 18 Aug 2003 Day 230 --- 03 05 39 W44DF 16 56 52 44.8 135.3 -2.0 -34.1 -15 1 1 15867 03 05 39 03 08 39 --- 16 59 52 45.2 136.2 -1.9 -33.5 165 F 1 16467 03 08 39 J1838+0404 16 59 52 49.8 139.6 -1.7 -31.2 -15 1 1 16467 03 08 39 03 10 39 =J1838+04 17 01 52 50.1 140.3 -1.6 -30.7 105 F 1 16867 03 10 39 W44BC 17 01 52 45.4 137.1 -1.9 -32.8 -15 1 1 16867 03 10 39 03 13 39 --- 17 04 53 45.8 138.0 -1.9 -32.2 165 F 1 17467 03 13 39 J1838+0404 17 04 53 50.5 141.3 -1.6 -30.0 -15 1 2 17467 03 13 39 03 15 39 =J1838+04 17 06 53 50.7 142.0 -1.5 -29.5 105 R 1 17067 03 15 39 W44DF 17 06 53 46.2 138.3 -1.8 -32.0 -15 1 2 17067 03 15 39 03 18 39 --- 17 09 54 46.6 139.2 -1.8 -31.4 165 R 1 16467 03 18 39 J1838+0404 17 09 54 51.1 143.0 -1.5 -28.7 -15 1 2 16467 03 18 39 03 20 39 =J1838+04 17 11 54 51.3 143.7 -1.5 -28.2 105 R 1 16067 03 20 39 W44BC 17 11 54 46.7 140.2 -1.7 -30.7 -15 1 2 16067 03 20 39 03 23 39 --- 17 14 55 47.1 141.1 -1.7 -30.0 165 R 1 15467 03 23 39 J1838+0404 17 14 55 51.7 144.8 -1.4 -27.4 -15 1 2 15467 03 23 39 03 25 39 =J1838+04 17 16 55 51.9 145.5 -1.4 -26.9 105 R 1 15067 03 25 39 W44DF 17 16 55 47.4 141.4 -1.7 -29.8 -15 1 2 15067 03 25 39 03 28 39 --- 17 19 55 47.8 142.4 -1.6 -29.1 165 R 1 14467 03 28 39 J1838+0404 17 19 55 52.2 146.6 -1.3 -26.1 -15 1 2 14467 03 28 39 03 30 39 =J1838+04 17 21 56 52.4 147.3 -1.3 -25.5 105 R 1 14067 03 30 39 W44BC 17 21 56 47.9 143.4 -1.6 -28.4 -15 1 2 14067 03 30 39 03 33 39 --- 17 24 56 48.3 144.4 -1.5 -27.6 165 R 1 13467 03 33 39 J1838+0404 17 24 56 52.8 148.4 -1.2 -24.7 -15 1 2 13467 03 33 39 03 35 39 =J1838+04 17 26 57 53.0 149.2 -1.2 -24.1 105 R 1 13067 03 35 39 W44DF 17 26 57 48.6 144.7 -1.5 -27.4 -15 1 2 13067 03 35 39 03 38 39 --- 17 29 57 49.0 145.7 -1.4 -26.6 165 R 1 12467 03 38 39 J1838+0404 17 29 57 53.3 150.3 -1.2 -23.3 -15 1 2 12467 03 38 39 03 40 39 =J1838+04 17 31 57 53.5 151.1 -1.1 -22.7 105 R 1 12067 Schedule for VLBA_OV (Code Ov ) Page 5 SNR/OH(1720 MHz) Masers Toward W44 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). Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Mon 18 Aug 2003 Day 230 --- 03 40 39 W44BC 17 31 57 49.1 146.7 -1.4 -25.9 -15 1 2 12067 03 40 39 03 43 39 --- 17 34 58 49.4 147.8 -1.4 -25.1 165 R 1 11467 03 43 39 J1838+0404 17 34 58 53.7 152.3 -1.1 -21.8 -15 1 2 11467 03 43 39 03 45 39 =J1838+04 17 36 58 53.9 153.1 -1.0 -21.2 105 R 1 11067 03 45 39 W44DF 17 36 58 49.8 148.2 -1.3 -24.8 -14 1 2 11067 03 45 39 03 48 39 --- 17 39 59 50.1 149.2 -1.3 -24.1 166 R 1 10467 03 48 39 J1838+0404 17 39 59 54.2 154.3 -1.0 -20.3 -14 1 2 10467 03 48 39 03 50 39 =J1838+04 17 41 59 54.4 155.1 -1.0 -19.7 106 R 1 10067 03 50 39 W44BC 17 41 59 50.1 150.3 -1.2 -23.3 -15 1 2 10067 03 50 39 03 53 39 --- 17 45 00 50.4 151.3 -1.2 -22.4 165 R 1 9467 03 53 39 J1838+0404 17 45 00 54.6 156.3 -0.9 -18.7 -14 1 2 9467 03 53 39 03 55 39 =J1838+04 17 47 00 54.8 157.1 -0.9 -18.1 106 R 1 9067 03 56 35 J1751+0939 17 47 55 62.4 178.0 -0.1 -1.6 34 1 2 9067 03 55 39 04 01 15 --- 17 52 36 62.4 180.5 0.0 0.4 280 R 1 7949 04 01 15 W44DF 17 52 36 51.3 153.8 -1.1 -20.6 -28 1 2 7949 04 01 15 04 04 16 --- 17 55 38 51.5 155.0 -1.0 -19.7 153 R 1 7345 04 04 16 J1838+0404 17 55 38 55.4 160.7 -0.7 -15.3 -14 1 2 7345 04 04 16 04 06 16 =J1838+04 17 57 38 55.5 161.6 -0.7 -14.6 106 R 1 6945 04 06 16 W44BC 17 57 38 51.5 156.0 -1.0 -18.9 -14 1 2 6945 04 06 16 04 09 17 --- 18 00 40 51.7 157.2 -0.9 -18.0 167 R 1 6342 04 09 17 J1838+0404 18 00 40 55.7 162.9 -0.6 -13.6 -14 1 2 6342 04 09 17 04 11 17 =J1838+04 18 02 40 55.8 163.7 -0.6 -12.9 106 R 1 5942 04 11 17 W44DF 18 02 40 52.1 157.7 -0.9 -17.6 -13 1 2 5942 04 11 17 04 14 18 --- 18 05 41 52.3 158.8 -0.9 -16.7 168 R 1 5339 04 14 18 J1838+0404 18 05 41 56.0 165.0 -0.6 -11.9 -13 1 2 5339 04 14 18 04 16 18 =J1838+04 18 07 42 56.1 165.9 -0.5 -11.2 107 R 1 4939 04 16 18 W44BC 18 07 42 52.3 159.9 -0.8 -15.9 -14 1 2 4939 04 16 18 04 19 19 --- 18 10 43 52.5 161.1 -0.8 -14.9 167 R 1 4335 Schedule for VLBA_OV (Code Ov ) Page 6 SNR/OH(1720 MHz) Masers Toward W44 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). Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Mon 18 Aug 2003 Day 230 --- 04 19 19 J1838+0404 18 10 43 56.2 167.2 -0.5 -10.2 -14 1 2 4335 04 19 19 04 21 19 =J1838+04 18 12 43 56.3 168.1 -0.4 -9.4 106 R 1 3935 04 21 19 W44DF 18 12 43 52.8 161.6 -0.7 -14.5 -13 1 2 3935 04 21 19 04 24 20 --- 18 15 45 53.0 162.8 -0.7 -13.6 168 R 1 3332 04 24 20 J1838+0404 18 15 45 56.4 169.5 -0.4 -8.4 -13 1 2 3332 04 24 20 04 26 20 =J1838+04 18 17 45 56.5 170.4 -0.4 -7.7 107 R 1 2932 04 26 20 W44BC 18 17 45 52.9 163.9 -0.6 -12.7 -13 1 2 2932 04 26 20 04 29 21 --- 18 20 47 53.0 165.2 -0.6 -11.8 168 R 1 2329 04 29 21 J1838+0404 18 20 47 56.6 171.7 -0.3 -6.6 -13 1 2 2329 04 29 21 04 31 21 =J1838+04 18 22 47 56.6 172.6 -0.3 -5.9 107 R 1 1929 04 31 21 W44DF 18 22 47 53.3 165.7 -0.6 -11.3 -13 1 2 1929 04 31 21 04 34 22 --- 18 25 49 53.5 166.9 -0.5 -10.4 168 R 1 1325 04 34 22 J1838+0404 18 25 49 56.7 174.0 -0.2 -4.8 -12 1 2 1325 04 34 22 04 36 22 =J1838+04 18 27 49 56.7 174.9 -0.2 -4.1 108 R 1 925 04 36 22 W44BC 18 27 49 53.4 168.1 -0.5 -9.5 -13 1 2 925 04 36 22 04 39 23 --- 18 30 50 53.5 169.3 -0.4 -8.5 168 R 1 322 04 39 23 J1838+0404 18 30 50 56.8 176.3 -0.1 -3.0 -13 1 1 322 04 39 23 04 41 23 =J1838+04 18 32 51 56.8 177.2 -0.1 -2.2 107 F 2 722 04 41 23 W44DF 18 32 51 53.8 169.9 -0.4 -8.1 -12 1 1 722 04 41 23 04 44 24 --- 18 35 52 53.9 171.1 -0.3 -7.0 169 F 2 1325 04 44 24 J1838+0404 18 35 52 56.8 178.6 -0.1 -1.1 -12 1 1 1325 04 44 24 04 46 24 =J1838+04 18 37 53 56.8 179.5 0.0 -0.4 108 F 2 1725 04 46 24 W44BC 18 37 53 53.7 172.2 -0.3 -6.2 -12 1 1 1725 04 46 24 04 49 25 --- 18 40 54 53.8 173.5 -0.3 -5.2 169 F 2 2329 04 49 25 J1838+0404 18 40 54 56.8 180.9 0.0 0.7 -12 1 1 2329 04 49 25 04 51 25 =J1838+04 18 42 54 56.8 181.8 0.1 1.4 108 F 2 2729 04 51 25 W44DF 18 42 54 54.0 174.1 -0.2 -4.7 -12 1 1 2729 04 51 25 04 54 26 --- 18 45 56 54.1 175.4 -0.2 -3.7 169 F 2 3332 Schedule for VLBA_OV (Code Ov ) Page 7 SNR/OH(1720 MHz) Masers Toward W44 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). Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Mon 18 Aug 2003 Day 230 --- 04 54 26 J1838+0404 18 45 56 56.8 183.2 0.1 2.5 -11 1 1 3332 04 54 26 04 56 26 =J1838+04 18 47 56 56.8 184.1 0.1 3.2 109 F 2 3732 04 56 26 W44BC 18 47 56 53.9 176.5 -0.1 -2.8 -12 1 1 3732 04 56 26 04 59 27 --- 18 50 58 53.9 177.8 -0.1 -1.8 169 F 2 4335 04 59 27 J1838+0404 18 50 58 56.7 185.4 0.2 4.3 -12 1 1 4335 04 59 27 05 01 27 =J1838+04 18 52 58 56.7 186.4 0.2 5.1 108 F 2 4735 05 01 27 W44DF 18 52 58 54.2 178.4 -0.1 -1.3 -11 1 1 4735 05 01 27 05 04 28 --- 18 56 00 54.2 179.7 0.0 -0.2 170 F 2 5339 05 04 28 J1838+0404 18 56 00 56.6 187.7 0.3 6.2 -11 1 1 5339 05 04 28 05 06 28 =J1838+04 18 58 00 56.6 188.6 0.3 6.9 109 F 2 5739 05 06 28 W44BC 18 58 00 53.9 180.8 0.0 0.6 -11 1 1 5739 05 06 28 05 09 29 --- 19 01 01 53.9 182.0 0.1 1.6 170 F 2 6342 05 09 29 J1838+0404 19 01 01 56.5 190.0 0.4 7.9 -11 1 1 6342 05 09 29 05 11 29 =J1838+04 19 03 02 56.4 190.9 0.4 8.7 109 F 2 6742 05 13 47 3C345 19 05 20 62.2 286.4 2.4 83.8 68 1 1 6742 05 13 47 05 18 47 --- 19 10 21 61.3 286.6 2.5 83.2 300 F 2 7742 05 20 26 J1751+0939 19 12 01 57.0 218.4 1.3 30.1 48 1 1 7742 05 20 26 05 25 06 --- 19 16 41 56.4 220.2 1.4 31.4 280 F 2 8675 05 25 06 W44DF 19 16 41 53.9 188.5 0.3 6.8 -27 1 1 8675 05 25 06 05 28 07 --- 19 19 43 53.8 189.8 0.4 7.8 154 F 2 9279 05 28 07 J1838+0404 19 19 43 55.6 198.2 0.7 14.4 -12 1 1 9279 05 28 07 05 30 07 =J1838+04 19 21 43 55.4 199.0 0.7 15.1 108 F 2 9679 05 30 07 W44BC 19 21 43 53.5 190.8 0.4 8.5 -12 1 1 9679 05 30 07 05 33 08 --- 19 24 45 53.4 192.0 0.5 9.5 169 F 2 10282 05 33 08 J1838+0404 19 24 45 55.2 200.3 0.8 16.1 -12 1 1 10282 05 33 08 05 35 08 =J1838+04 19 26 45 55.1 201.1 0.8 16.7 108 F 2 10682 05 35 08 W44DF 19 26 45 53.5 192.7 0.5 10.1 -12 1 1 10682 05 35 08 05 38 09 --- 19 29 47 53.4 193.9 0.6 11.1 169 F 2 11285 Schedule for VLBA_OV (Code Ov ) Page 8 SNR/OH(1720 MHz) Masers Toward W44 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). Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Mon 18 Aug 2003 Day 230 --- 05 38 09 J1838+0404 19 29 47 54.9 202.4 0.8 17.7 -12 1 1 11285 05 38 09 05 40 09 =J1838+04 19 31 47 54.7 203.2 0.9 18.3 108 F 2 11685 05 40 09 W44BC 19 31 47 53.0 194.9 0.6 11.8 -12 1 1 11685 05 40 09 05 43 10 --- 19 34 48 52.9 196.1 0.6 12.8 169 F 2 12289 05 43 10 J1838+0404 19 34 48 54.5 204.4 0.9 19.3 -12 1 1 12289 05 43 10 05 45 10 =J1838+04 19 36 49 54.3 205.3 1.0 19.9 108 F 2 12689 05 45 10 W44DF 19 36 49 53.0 196.8 0.7 13.3 -12 1 1 12689 05 45 10 05 48 11 --- 19 39 50 52.8 198.0 0.7 14.3 169 F 2 13292 05 48 11 J1838+0404 19 39 50 54.0 206.5 1.0 20.8 -12 1 1 13292 05 48 11 05 50 11 =J1838+04 19 41 51 53.9 207.3 1.0 21.4 108 F 2 13692 05 50 11 W44BC 19 41 51 52.4 198.9 0.8 15.0 -12 1 1 13692 05 50 11 05 53 12 --- 19 44 52 52.2 200.1 0.8 15.9 169 F 2 14295 05 53 12 J1838+0404 19 44 52 53.6 208.4 1.1 22.3 -12 1 1 14295 05 53 12 05 55 12 =J1838+04 19 46 52 53.4 209.2 1.1 22.9 108 F 2 14695 05 55 12 W44DF 19 46 52 52.4 200.8 0.8 16.4 -12 1 1 14695 05 55 12 05 58 13 --- 19 49 54 52.2 202.0 0.9 17.4 169 F 2 15299 05 58 13 J1838+0404 19 49 54 53.1 210.4 1.2 23.8 -12 1 1 15299 05 58 13 06 00 13 =J1838+04 19 51 54 52.9 211.1 1.2 24.4 108 F 2 15699 06 00 13 W44BC 19 51 54 51.7 202.9 0.9 18.0 -12 1 1 15699 06 00 13 06 03 14 --- 19 54 56 51.5 204.0 1.0 18.9 169 F 2 16302 06 03 14 J1838+0404 19 54 56 52.6 212.3 1.3 25.2 -11 1 1 16302 06 03 14 06 05 14 =J1838+04 19 56 56 52.3 213.0 1.3 25.8 109 F 2 16702 06 05 14 W44DF 19 56 56 51.6 204.7 1.0 19.4 -12 1 1 16702 06 05 14 06 08 15 --- 19 59 58 51.3 205.8 1.1 20.3 169 F 2 17305 06 08 15 J1838+0404 19 59 58 52.0 214.1 1.3 26.6 -12 1 2 17305 06 08 15 06 10 15 =J1838+04 20 01 58 51.8 214.8 1.4 27.1 108 R 2 16905 06 10 15 W44BC 20 01 58 50.9 206.7 1.1 20.9 -11 1 2 16905 06 10 15 06 13 16 --- 20 04 59 50.6 207.8 1.1 21.8 170 R 2 16302 Schedule for VLBA_OV (Code Ov ) Page 9 SNR/OH(1720 MHz) Masers Toward W44 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). Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Mon 18 Aug 2003 Day 230 --- 06 13 16 J1838+0404 20 04 59 51.4 215.9 1.4 27.9 -11 1 2 16302 06 13 16 06 15 16 =J1838+04 20 07 00 51.2 216.6 1.5 28.4 109 R 2 15902 06 15 16 W44DF 20 07 00 50.7 208.5 1.2 22.3 -11 1 2 15902 06 15 16 06 18 17 --- 20 10 01 50.4 209.5 1.2 23.1 170 R 2 15299 06 18 17 J1838+0404 20 10 01 50.8 217.7 1.5 29.2 -11 1 2 15299 06 18 17 06 20 17 =J1838+04 20 12 02 50.6 218.3 1.6 29.7 109 R 2 14899 06 20 17 W44BC 20 12 02 49.9 210.3 1.3 23.7 -11 1 2 14899 06 20 17 06 23 18 --- 20 15 03 49.6 211.4 1.3 24.5 170 R 2 14295 06 23 18 J1838+0404 20 15 03 50.2 219.4 1.6 30.4 -11 1 2 14295 06 23 18 06 25 18 =J1838+04 20 17 03 50.0 220.0 1.6 30.9 109 R 2 13895 06 25 18 W44DF 20 17 03 49.7 212.0 1.3 25.0 -11 1 2 13895 06 25 18 06 28 19 --- 20 20 05 49.4 213.1 1.4 25.8 170 R 2 13292 06 28 19 J1838+0404 20 20 05 49.6 221.0 1.7 31.6 -11 1 2 13292 06 28 19 06 30 19 =J1838+04 20 22 05 49.3 221.7 1.7 32.1 109 R 2 12892 06 30 19 W44BC 20 22 05 48.9 213.8 1.4 26.3 -11 1 2 12892 06 30 19 06 33 20 --- 20 25 07 48.5 214.8 1.5 27.1 170 R 2 12289 06 33 20 J1838+0404 20 25 07 48.9 222.7 1.8 32.8 -11 1 2 12289 06 33 20 06 35 20 =J1838+04 20 27 07 48.6 223.3 1.8 33.2 109 R 2 11889 06 35 59 J1751+0939 20 27 46 45.3 242.0 2.6 45.5 20 1 2 11889 06 35 20 06 40 39 --- 20 32 27 44.5 243.1 2.7 46.1 280 R 2 10826 06 40 39 W44DF 20 32 27 47.9 217.3 1.6 28.8 -23 1 2 10826 06 40 39 06 43 39 --- 20 35 27 47.6 218.2 1.6 29.5 157 R 2 10226 06 43 39 J1838+0404 20 35 27 47.5 225.9 1.9 35.0 -11 1 2 10226 06 43 39 06 45 39 =J1838+04 20 37 28 47.2 226.5 2.0 35.4 109 R 2 9826 06 45 39 W44BC 20 37 28 47.1 218.9 1.7 30.0 -11 1 2 9826 06 45 39 06 48 39 --- 20 40 28 46.7 219.8 1.7 30.7 169 R 2 9226 06 48 39 J1838+0404 20 40 28 46.7 227.4 2.0 36.0 -11 1 2 9226 06 48 39 06 50 39 =J1838+04 20 42 28 46.4 228.0 2.1 36.4 109 R 2 8826 Schedule for VLBA_OV (Code Ov ) Page 10 SNR/OH(1720 MHz) Masers Toward W44 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). Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Mon 18 Aug 2003 Day 230 --- 06 50 39 W44DF 20 42 28 46.7 220.5 1.8 31.1 -11 1 2 8826 06 50 39 06 53 39 --- 20 45 29 46.3 221.4 1.8 31.8 169 R 2 8226 06 53 39 J1838+0404 20 45 29 46.0 228.8 2.1 36.9 -11 1 2 8226 06 53 39 06 55 39 =J1838+04 20 47 29 45.7 229.4 2.1 37.3 109 R 2 7826 06 55 39 W44BC 20 47 29 45.8 222.0 1.9 32.2 -11 1 2 7826 06 55 39 06 58 39 --- 20 50 30 45.4 222.9 1.9 32.8 169 R 2 7226 06 58 39 J1838+0404 20 50 30 45.2 230.3 2.2 37.9 -11 1 2 7226 06 58 39 07 00 39 =J1838+04 20 52 30 44.9 230.8 2.2 38.2 109 R 2 6826 07 00 39 W44DF 20 52 30 45.4 223.5 1.9 33.3 -11 1 2 6826 07 00 39 07 03 39 --- 20 55 31 44.9 224.4 2.0 33.9 169 R 2 6226 07 03 39 J1838+0404 20 55 31 44.5 231.6 2.3 38.7 -11 1 2 6226 07 03 39 07 05 39 =J1838+04 20 57 31 44.1 232.2 2.3 39.1 109 R 2 5826 07 05 39 W44BC 20 57 31 44.4 224.9 2.0 34.2 -11 1 2 5826 07 05 39 07 08 39 --- 21 00 31 44.0 225.8 2.1 34.8 169 R 2 5226 07 08 39 J1838+0404 21 00 31 43.7 233.0 2.4 39.6 -11 1 2 5226 07 08 39 07 10 39 =J1838+04 21 02 32 43.4 233.5 2.4 39.9 109 R 2 4826 07 10 39 W44DF 21 02 32 43.9 226.4 2.1 35.2 -11 1 2 4826 07 10 39 07 13 39 --- 21 05 32 43.5 227.3 2.1 35.8 169 R 2 4226 07 13 39 J1838+0404 21 05 32 42.9 234.3 2.4 40.4 -11 1 2 4226 07 13 39 07 15 39 =J1838+04 21 07 33 42.5 234.8 2.5 40.7 109 R 2 3826 07 15 39 W44BC 21 07 33 43.0 227.8 2.2 36.1 -11 1 2 3826 07 15 39 07 18 39 --- 21 10 33 42.5 228.6 2.2 36.7 169 R 2 3226 07 18 39 J1838+0404 21 10 33 42.1 235.6 2.5 41.2 -11 1 2 3226 07 18 39 07 20 39 =J1838+04 21 12 33 41.7 236.1 2.6 41.5 109 R 2 2826 07 20 39 W44DF 21 12 33 42.5 229.2 2.3 37.1 -11 1 2 2826 07 20 39 07 23 39 --- 21 15 34 42.0 230.0 2.3 37.6 169 R 2 2226 07 23 39 J1838+0404 21 15 34 41.2 236.8 2.6 41.9 -11 1 2 2226 07 23 39 07 25 39 =J1838+04 21 17 34 40.9 237.3 2.6 42.2 109 R 2 1826 Schedule for VLBA_OV (Code Ov ) Page 11 SNR/OH(1720 MHz) Masers Toward W44 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). Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Mon 18 Aug 2003 Day 230 --- 07 25 39 W44BC 21 17 34 41.4 230.5 2.4 37.9 -11 1 2 1826 07 25 39 07 28 39 --- 21 20 35 41.0 231.3 2.4 38.4 169 R 2 1226 07 28 39 J1838+0404 21 20 35 40.4 238.1 2.7 42.6 -11 1 2 1226 07 28 39 07 30 39 =J1838+04 21 22 35 40.0 238.5 2.7 42.9 109 R 2 826 07 30 39 W44DF 21 22 35 40.9 231.9 2.4 38.8 -10 1 2 826 07 30 39 07 33 39 --- 21 25 36 40.5 232.6 2.5 39.3 170 R 2 226 07 33 39 J1838+0404 21 25 36 39.5 239.3 2.8 43.3 -10 1 3 226 07 33 39 07 35 39 =J1838+04 21 27 36 39.2 239.7 2.8 43.6 110 F 1 626 07 35 39 W44BC 21 27 36 39.9 233.1 2.5 39.5 -10 1 3 626 07 35 39 07 38 39 --- 21 30 36 39.4 233.8 2.6 40.0 170 F 1 1226 07 38 39 J1838+0404 21 30 36 38.7 240.4 2.9 44.0 -10 1 3 1226 07 38 39 07 40 39 =J1838+04 21 32 37 38.3 240.9 2.9 44.2 110 F 1 1626 07 40 39 W44DF 21 32 37 39.3 234.4 2.6 40.3 -10 1 3 1626 07 40 39 07 43 39 --- 21 35 37 38.8 235.1 2.6 40.8 170 F 1 2226 07 43 39 J1838+0404 21 35 37 37.8 241.6 2.9 44.6 -10 1 3 2226 07 43 39 07 45 39 =J1838+04 21 37 37 37.4 242.0 3.0 44.8 110 F 1 2626 07 45 39 W44BC 21 37 37 38.3 235.5 2.7 41.0 -10 1 3 2626 07 45 39 07 48 39 --- 21 40 38 37.8 236.2 2.7 41.5 170 F 1 3226 07 48 39 J1838+0404 21 40 38 36.9 242.7 3.0 45.2 -10 1 3 3226 07 48 39 07 50 39 =J1838+04 21 42 38 36.6 243.1 3.1 45.4 110 F 1 3626 07 51 14 J1751+0939 21 43 13 31.3 257.6 3.9 52.1 18 1 3 3626 07 50 39 07 55 54 --- 21 47 54 30.3 258.4 3.9 52.3 280 F 1 4674 07 55 54 W44DF 21 47 54 36.8 238.0 2.9 42.5 -20 1 3 4674 07 55 54 07 58 44 --- 21 50 44 36.3 238.7 2.9 42.9 150 F 1 5241 07 58 44 J1838+0404 21 50 44 35.1 244.8 3.2 46.3 -10 1 3 5241 07 58 44 08 00 44 =J1838+04 21 52 45 34.7 245.3 3.2 46.5 110 F 1 5641 08 00 44 W44BC 21 52 45 35.7 239.0 2.9 43.1 -10 1 3 5641 08 00 44 08 03 34 --- 21 55 35 35.2 239.7 3.0 43.4 160 F 1 6208 Schedule for VLBA_OV (Code Ov ) Page 12 SNR/OH(1720 MHz) Masers Toward W44 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). Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Mon 18 Aug 2003 Day 230 --- 08 03 34 J1838+0404 21 55 35 34.2 245.9 3.3 46.8 -10 1 3 6208 08 03 34 08 05 34 =J1838+04 21 57 35 33.9 246.3 3.3 46.9 110 F 1 6608 08 05 34 W44DF 21 57 35 35.1 240.2 3.0 43.7 -10 1 3 6608 08 05 34 08 08 24 --- 22 00 26 34.7 240.8 3.1 44.1 160 F 1 7174 08 08 24 J1838+0404 22 00 26 33.3 246.9 3.4 47.2 -10 1 3 7174 08 08 24 08 10 24 =J1838+04 22 02 26 33.0 247.3 3.4 47.4 110 F 1 7574 08 10 24 W44BC 22 02 26 34.0 241.2 3.1 44.2 -10 1 3 7574 08 10 24 08 13 14 --- 22 05 17 33.6 241.8 3.2 44.6 160 F 1 8141 08 13 14 J1838+0404 22 05 17 32.5 247.8 3.4 47.7 -10 1 3 8141 08 13 14 08 15 14 =J1838+04 22 07 17 32.1 248.2 3.5 47.8 110 F 1 8541 08 15 14 W44DF 22 07 17 33.5 242.3 3.2 44.8 -10 1 3 8541 08 15 14 08 18 04 --- 22 10 07 33.0 242.9 3.2 45.2 160 F 1 9108 08 18 04 J1838+0404 22 10 07 31.6 248.8 3.5 48.1 -10 1 3 9108 08 18 04 08 20 04 =J1838+04 22 12 08 31.2 249.2 3.6 48.2 110 F 1 9508 08 20 04 W44BC 22 12 08 32.3 243.2 3.3 45.3 -10 1 3 9508 08 20 04 08 22 54 --- 22 14 58 31.8 243.8 3.3 45.6 160 F 1 10074 08 22 54 J1838+0404 22 14 58 30.7 249.7 3.6 48.5 -10 1 3 10074 08 22 54 08 24 54 =J1838+04 22 16 59 30.3 250.1 3.6 48.6 110 F 1 10474 08 24 54 W44DF 22 16 59 31.7 244.3 3.3 45.9 -10 1 3 10474 08 24 54 08 27 44 --- 22 19 49 31.2 244.9 3.4 46.2 160 F 1 11041 08 27 44 J1838+0404 22 19 49 29.7 250.6 3.7 48.9 -10 1 3 11041 08 27 44 08 29 44 =J1838+04 22 21 49 29.4 251.0 3.7 49.0 110 F 1 11441 08 29 44 W44BC 22 21 49 30.6 245.2 3.4 46.3 -10 1 3 11441 08 29 44 08 32 34 --- 22 24 40 30.1 245.8 3.5 46.6 160 F 1 12008 08 32 34 J1838+0404 22 24 40 28.8 251.6 3.8 49.2 -10 1 3 12008 08 32 34 08 34 34 =J1838+04 22 26 40 28.5 251.9 3.8 49.4 110 F 1 12408 08 34 34 W44DF 22 26 40 30.0 246.3 3.5 46.8 -10 1 3 12408 08 34 34 08 37 24 --- 22 29 31 29.5 246.8 3.5 47.1 160 F 1 12974 Schedule for VLBA_OV (Code Ov ) Page 13 SNR/OH(1720 MHz) Masers Toward W44 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). Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Mon 18 Aug 2003 Day 230 --- 08 37 24 J1838+0404 22 29 31 27.9 252.4 3.8 49.6 -10 1 3 12974 08 37 24 08 39 24 =J1838+04 22 31 31 27.5 252.8 3.9 49.7 110 F 1 13374 08 39 24 W44BC 22 31 31 28.8 247.1 3.6 47.2 -10 1 3 13374 08 39 24 08 42 14 --- 22 34 21 28.3 247.7 3.6 47.4 160 F 1 13941 08 42 14 J1838+0404 22 34 21 27.0 253.3 3.9 49.9 -10 1 3 13941 08 42 14 08 44 14 =J1838+04 22 36 22 26.6 253.7 4.0 50.0 110 F 1 14341 08 44 14 W44DF 22 36 22 28.2 248.2 3.7 47.7 -10 1 3 14341 08 44 14 08 47 04 --- 22 39 12 27.7 248.7 3.7 47.9 160 F 1 14908 08 47 04 J1838+0404 22 39 12 26.1 254.2 4.0 50.2 -10 1 3 14908 08 47 04 08 49 04 =J1838+04 22 41 13 25.7 254.5 4.0 50.3 110 F 1 15308 08 49 04 W44BC 22 41 13 27.0 249.0 3.7 48.0 -10 1 3 15308 08 49 04 08 51 54 --- 22 44 03 26.5 249.5 3.8 48.2 160 F 1 15874 08 51 54 J1838+0404 22 44 03 25.1 255.0 4.1 50.5 -10 1 3 15874 08 51 54 08 53 54 =J1838+04 22 46 03 24.8 255.4 4.1 50.6 110 F 1 16274 08 54 29 J1751+0939 22 46 39 18.7 268.0 4.9 53.8 17 1 3 16274 08 53 54 08 59 09 --- 22 51 20 17.8 268.7 5.0 53.8 280 F 1 17326 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: v18cm-ian.set Matches group v20cm_2 in /home/filehost/cwalker/sched/catalogs/freq.dat FD filtered above 1760. SC filtered above 1740. Setup group: 1 Station: VLBA Total bit rate: 32 Format: VLBA1:1 Bits per sample: 2 Sample rate: 2.000 Number of channels: 8 Passes/head pos: 2 Speedup factor: 4.00 Tape speeds: Low density - 66.665 ips, High density - 40.00 ips Time per pass for 17600 ft, High density tapes is: 01:28:00 1st LO= 2400.00 2400.00 2400.00 2400.00 2400.00 2400.00 2400.00 2400.00 Net SB= U U L L L L L L Pol. = RCP LCP RCP LCP RCP LCP RCP LCP BBC = 1 2 3 4 5 6 7 8 BBC SB= L L U U U U U U IF = A C A C A C A C VLBA FE= 20cm omit 20cm omit VLBA Synth= 15.4 2.4 15.4 The following frequency sets based on this setup were used. Frequency Set: 1 Based on FREQ, BW, and/or DOPPLER in schedule. Used pcal sets: 1 LO sum= 1720.24 1720.24 1720.17 1720.17 1719.17 1719.17 1718.17 1718.17 BBC fr= 679.76 679.76 679.83 679.83 680.83 680.83 681.83 681.83 Bandwd= 0.062 0.062 1.000 1.000 1.000 1.000 1.000 1.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 1 PCAL = OFF PCALXB1= S1 S2 S3 S4 S5 S6 S7 S8 PCALXB2= M1 M2 M3 M4 M5 M6 M7 M8 PCALFR1= 0 0 0 0 0 0 0 0 PCALFR2= 0 0 0 0 0 0 0 0 Track assignments are: track1= 2, 6, 10, 14, 18, 22, 26, 30 track2= 3, 7, 11, 15, 19, 23, 27, 31 barrel=roll_auto SOURCE LIST -- SNR/OH(1720 MHz) Masers Toward W44 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). Source Source position (RA/Dec) (B1950) (J2000) (Date) * W44DF * 18 54 00.000000 18 56 32.221496 18 56 43.464766 * 01 21 00.00000 01 24 59.36144 01 25 17.39798 From catalog imbedded in main SCHED input file. * W44BC * 18 53 29.000000 18 56 01.490177 18 56 12.750063 * 01 06 45.00000 01 10 42.17661 01 11 00.01523 From catalog imbedded in main SCHED input file. * 3C345 16 41 17.606214 * 16 42 58.809951 16 43 06.235716 J1642+3948 39 54 10.81489 * 39 48 36.99395 39 48 26.23193 From catalog imbedded in main SCHED input file. fringe finder J1838+04 18 36 19.708768 * 18 38 48.829033 18 38 59.799337 * J1838+0404 04 01 41.08993 * 04 04 24.66927 04 04 38.12745 From catalog imbedded in main SCHED input file. phase ref source, 250mJy, 5 degrees away * 3C286 13 28 49.657692 * 13 31 08.287984 13 31 17.077484 J1331+305 30 45 58.64021 * 30 30 32.95885 30 29 42.64242 From catalog imbedded in main SCHED input file. linear polarization calibrator, sets early * J1751+0939 17 49 10.387930 * 17 51 32.818573 17 51 43.156177 09 39 42.82596 * 09 39 00.72851 09 39 01.85600 From catalog imbedded in main SCHED input file. D-term cal, ICRF, 1.1 Jy point source in bh097 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) W44DF 134.9 W44BC 134.9 3C345 91.7 J1838+0404 129.8 3C286 53.9 J1751+0939 116.9 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