COVER INFORMATION Station: VLBA_MK (Code Mk ) Experiment: BE042d; S/X observation of J0838+2453 Exp. Code: be042d Schedule Version: 1.00 Processed by SCHED version: 6.02 July 2005 PI: Philip Edwards Address: Institute of Space and Astronautical Science 3-1-1 Yoshinodai, Sagamihara Kanagawa 229-8510 Japan Phone: +81-42-759-8342 EMAIL: pge@vsop.isas.ac.jp Fax: +81-42-759-8485 Phone during observation: +81-42-759-8342 Observing mode: 128-4-2 Notes: Fringe finder: J0854+2006 (=OJ287) Ph. ref. cal.: J0837+2454 1 x 2.5 hrs dynamically scheduled centered at LST 8.5 Schedule for VLBA_MK (Code Mk ) Page 2 BE042d; S/X observation of J0838+2453 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). SYNC: Time correlator is expected to sync up. 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) SYNC ---------------------------------------------------------------------------------------- --- Sat 20 Aug 2005 Day 232 --- Next scan frequencies: 2262.49 2270.49 8412.49 8420.49 Next BBC frequencies: 837.51 829.51 812.49 820.49 Next scan bandwidths: 8.00 8.00 8.00 8.00 16 31 03 J0854+2006 04 05 39 22.6 75.8 -4.8 -76.2 0 1 1 0 16 30 48 16 35 22 =0851+202 04 09 59 23.6 76.0 -4.8 -76.5 259 F 1 1829 16 31 01 16 37 32 J0837+2454 04 12 09 28.9 71.8 -4.4 -80.2 113 1 1 1829 16 37 17 16 38 21 =0834+250 04 12 59 29.1 71.8 -4.4 -80.3 50 F 1 2261 16 37 30 16 38 31 J0838+2453 04 13 09 29.0 71.8 -4.4 -80.2 5 1 1 2261 16 38 21 16 41 21 --- 04 15 59 29.7 72.0 -4.4 -80.5 170 F 1 3458 16 38 21 16 41 31 J0837+2454 04 16 09 29.8 72.0 -4.4 -80.5 4 1 1 3458 16 41 21 16 42 21 =0834+250 04 16 59 30.0 72.0 -4.3 -80.6 50 F 1 3857 16 41 21 16 42 31 J0838+2453 04 17 09 29.9 72.0 -4.4 -80.6 5 1 1 3857 16 42 21 16 45 20 --- 04 19 59 30.5 72.1 -4.3 -80.8 170 F 1 5053 16 42 21 16 45 30 J0837+2454 04 20 09 30.7 72.2 -4.3 -80.9 4 1 1 5053 16 45 20 16 46 20 =0834+250 04 20 59 30.9 72.2 -4.3 -80.9 50 F 1 5452 16 45 20 16 46 30 J0838+2453 04 21 09 30.8 72.2 -4.3 -80.9 5 1 1 5452 16 46 20 16 49 20 --- 04 23 59 31.4 72.3 -4.2 -81.1 170 F 1 6649 16 46 20 16 49 30 J0837+2454 04 24 09 31.6 72.3 -4.2 -81.2 4 1 1 6649 16 49 20 16 50 19 =0834+250 04 24 59 31.8 72.4 -4.2 -81.3 50 F 1 7048 16 49 20 16 50 29 J0838+2453 04 25 09 31.7 72.4 -4.2 -81.2 5 1 1 7048 16 50 19 16 53 19 --- 04 27 59 32.3 72.5 -4.2 -81.5 170 F 1 8245 16 50 19 16 53 29 J0837+2454 04 28 09 32.5 72.5 -4.2 -81.5 4 1 1 8245 16 53 19 16 54 19 =0834+250 04 28 59 32.7 72.5 -4.1 -81.6 50 F 1 8644 16 53 19 16 54 29 J0838+2453 04 29 09 32.6 72.5 -4.2 -81.6 5 1 1 8644 16 54 19 16 57 18 --- 04 31 59 33.2 72.6 -4.1 -81.8 170 F 1 9840 16 54 19 16 57 28 J0837+2454 04 32 09 33.4 72.6 -4.1 -81.9 4 1 1 9840 16 57 18 16 58 18 =0834+250 04 32 59 33.6 72.7 -4.1 -81.9 50 F 1 10239 16 57 18 16 58 28 J0838+2453 04 33 09 33.5 72.7 -4.1 -81.9 5 1 1 10239 16 58 18 17 01 18 --- 04 35 59 34.1 72.8 -4.0 -82.1 170 F 1 11436 16 58 18 Schedule for VLBA_MK (Code Mk ) Page 3 BE042d; S/X observation of J0838+2453 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). SYNC: Time correlator is expected to sync up. 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) SYNC ---------------------------------------------------------------------------------------- --- Sat 20 Aug 2005 Day 232 --- 17 01 28 J0837+2454 04 36 09 34.3 72.8 -4.0 -82.2 4 1 1 11436 17 01 18 17 02 17 =0834+250 04 36 59 34.5 72.8 -4.0 -82.3 50 F 1 11835 17 01 18 17 02 27 J0838+2453 04 37 09 34.4 72.8 -4.0 -82.2 5 1 1 11835 17 02 17 17 05 17 --- 04 39 59 35.0 72.9 -4.0 -82.5 170 F 1 13032 17 02 17 17 05 27 J0837+2454 04 40 09 35.2 72.9 -4.0 -82.5 4 1 1 13032 17 05 17 17 06 17 =0834+250 04 40 59 35.4 73.0 -3.9 -82.6 50 F 1 13430 17 05 17 17 06 27 J0838+2453 04 41 09 35.3 73.0 -4.0 -82.6 5 1 1 13430 17 06 17 17 09 16 --- 04 43 59 35.9 73.1 -3.9 -82.8 170 F 1 14627 17 06 17 17 09 26 J0837+2454 04 44 09 36.1 73.1 -3.9 -82.9 4 1 1 14627 17 09 16 17 10 16 =0834+250 04 44 59 36.3 73.1 -3.9 -83.0 50 F 1 15026 17 09 16 17 10 26 J0838+2453 04 45 09 36.2 73.1 -3.9 -82.9 5 1 1 15026 17 10 16 17 13 16 --- 04 47 59 36.8 73.2 -3.8 -83.2 170 F 1 16223 17 10 16 17 13 26 J0837+2454 04 48 09 37.0 73.2 -3.8 -83.2 4 1 1 16223 17 13 16 17 14 15 =0834+250 04 48 59 37.2 73.2 -3.8 -83.3 50 F 1 16622 17 13 16 17 14 25 J0838+2453 04 49 09 37.1 73.2 -3.8 -83.3 5 1 2 16622 17 14 15 17 17 15 --- 04 51 59 37.7 73.3 -3.8 -83.5 170 R 1 17382 17 14 15 17 17 25 J0837+2454 04 52 09 37.9 73.3 -3.8 -83.6 4 1 2 17382 17 17 15 17 18 15 =0834+250 04 52 59 38.1 73.4 -3.7 -83.6 50 R 1 16983 17 17 15 17 18 25 J0838+2453 04 53 09 38.0 73.4 -3.8 -83.6 5 1 2 16983 17 18 15 17 21 14 --- 04 55 59 38.6 73.5 -3.7 -83.8 170 R 1 15786 17 18 15 17 21 24 J0837+2454 04 56 09 38.8 73.5 -3.7 -83.9 4 1 2 15786 17 21 14 17 22 14 =0834+250 04 56 59 39.0 73.5 -3.7 -84.0 50 R 1 15387 17 21 14 17 22 24 J0838+2453 04 57 09 38.9 73.5 -3.7 -83.9 5 1 2 15387 17 22 14 17 25 14 --- 04 59 59 39.5 73.6 -3.6 -84.2 170 R 1 14190 17 22 14 17 25 24 J0837+2454 05 00 09 39.7 73.6 -3.6 -84.2 4 1 2 14190 17 25 14 17 26 14 =0834+250 05 00 59 39.9 73.6 -3.6 -84.3 50 R 1 13791 17 25 14 17 26 23 J0838+2453 05 01 09 39.8 73.6 -3.6 -84.3 5 1 2 13791 17 26 14 17 29 13 --- 05 03 59 40.4 73.7 -3.6 -84.5 170 R 1 12595 17 26 14 Schedule for VLBA_MK (Code Mk ) Page 4 BE042d; S/X observation of J0838+2453 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). SYNC: Time correlator is expected to sync up. 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) SYNC ---------------------------------------------------------------------------------------- --- Sat 20 Aug 2005 Day 232 --- 17 29 23 J0837+2454 05 04 09 40.6 73.7 -3.6 -84.6 4 1 2 12595 17 29 13 17 30 13 =0834+250 05 04 59 40.8 73.7 -3.5 -84.7 50 R 1 12196 17 29 13 17 30 23 J0838+2453 05 05 09 40.7 73.7 -3.6 -84.6 5 1 2 12196 17 30 13 17 33 12 --- 05 07 59 41.3 73.8 -3.5 -84.9 170 R 1 10999 17 30 13 17 33 22 J0837+2454 05 08 09 41.5 73.8 -3.5 -84.9 4 1 2 10999 17 33 12 17 34 12 =0834+250 05 08 59 41.7 73.8 -3.5 -85.0 50 R 1 10600 17 33 12 17 34 22 J0838+2453 05 09 09 41.6 73.8 -3.5 -85.0 5 1 2 10600 17 34 12 17 37 12 --- 05 11 59 42.3 73.9 -3.4 -85.2 170 R 1 9403 17 34 12 17 37 22 J0837+2454 05 12 09 42.4 73.9 -3.4 -85.3 4 1 2 9403 17 37 12 17 38 12 =0834+250 05 12 59 42.6 73.9 -3.4 -85.4 50 R 1 9005 17 37 12 17 38 22 J0838+2453 05 13 09 42.5 73.9 -3.4 -85.3 5 1 2 9005 17 38 12 17 41 11 --- 05 15 59 43.2 74.0 -3.4 -85.6 170 R 1 7808 17 38 12 17 41 21 J0837+2454 05 16 09 43.3 74.0 -3.4 -85.7 4 1 2 7808 17 41 11 17 42 11 =0834+250 05 16 59 43.5 74.0 -3.3 -85.7 50 R 1 7409 17 41 11 17 42 21 J0838+2453 05 17 09 43.4 74.0 -3.4 -85.7 5 1 2 7409 17 42 11 17 45 10 --- 05 19 59 44.1 74.1 -3.3 -85.9 170 R 1 6212 17 42 11 17 45 20 J0837+2454 05 20 09 44.2 74.1 -3.3 -86.0 4 1 2 6212 17 45 10 17 46 10 =0834+250 05 20 59 44.4 74.1 -3.3 -86.1 50 R 1 5813 17 45 10 17 46 20 J0838+2453 05 21 09 44.3 74.1 -3.3 -86.0 5 1 2 5813 17 46 10 17 49 10 --- 05 23 59 45.0 74.2 -3.2 -86.3 170 R 1 4617 17 46 10 17 49 20 J0837+2454 05 24 09 45.1 74.2 -3.2 -86.4 4 1 2 4617 17 49 10 17 50 10 =0834+250 05 24 59 45.3 74.2 -3.2 -86.4 50 R 1 4218 17 49 10 17 50 20 J0838+2453 05 25 09 45.2 74.2 -3.2 -86.4 5 1 2 4218 17 50 10 17 53 09 --- 05 27 59 45.9 74.3 -3.2 -86.7 170 R 1 3021 17 50 10 17 53 19 J0837+2454 05 28 09 46.0 74.3 -3.2 -86.7 4 1 2 3021 17 53 09 17 54 09 =0834+250 05 28 59 46.2 74.3 -3.1 -86.8 50 R 1 2622 17 53 09 17 54 19 J0838+2453 05 29 09 46.1 74.3 -3.2 -86.8 5 1 2 2622 17 54 09 17 57 08 --- 05 31 59 46.8 74.3 -3.1 -87.0 170 R 1 1425 17 54 09 Schedule for VLBA_MK (Code Mk ) Page 5 BE042d; S/X observation of J0838+2453 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). SYNC: Time correlator is expected to sync up. 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) SYNC ---------------------------------------------------------------------------------------- --- Sat 20 Aug 2005 Day 232 --- 17 57 18 J0837+2454 05 32 09 46.9 74.3 -3.1 -87.1 4 1 2 1425 17 57 08 17 58 08 =0834+250 05 32 59 47.1 74.4 -3.1 -87.2 50 R 1 1026 17 57 08 17 58 18 J0838+2453 05 33 09 47.0 74.4 -3.1 -87.1 5 1 3 1026 17 58 08 18 01 08 --- 05 35 59 47.7 74.4 -3.0 -87.4 170 F 1 170 17 58 08 18 01 18 J0837+2454 05 36 09 47.8 74.4 -3.0 -87.5 4 1 3 170 18 01 08 18 02 08 =0834+250 05 36 59 48.0 74.4 -3.0 -87.6 50 F 1 569 18 01 08 18 02 18 J0838+2453 05 37 09 47.9 74.4 -3.0 -87.5 5 1 3 569 18 02 08 18 05 07 --- 05 39 59 48.6 74.5 -3.0 -87.8 170 F 1 1766 18 02 08 18 05 17 J0837+2454 05 40 09 48.7 74.5 -3.0 -87.9 4 1 3 1766 18 05 07 18 06 07 =0834+250 05 40 59 48.9 74.5 -2.9 -87.9 50 F 1 2165 18 05 07 18 06 17 J0838+2453 05 41 09 48.9 74.5 -3.0 -87.9 5 1 3 2165 18 06 07 18 09 06 --- 05 43 59 49.5 74.5 -2.9 -88.2 170 F 1 3362 18 06 07 18 09 16 J0837+2454 05 44 09 49.7 74.5 -2.9 -88.2 4 1 3 3362 18 09 06 18 10 06 =0834+250 05 44 59 49.8 74.5 -2.9 -88.3 50 F 1 3761 18 09 06 18 10 16 J0838+2453 05 45 09 49.8 74.5 -2.9 -88.3 5 1 3 3761 18 10 06 18 13 06 --- 05 47 59 50.4 74.6 -2.8 -88.6 170 F 1 4957 18 10 06 18 13 16 J0837+2454 05 48 09 50.6 74.5 -2.8 -88.6 4 1 3 4957 18 13 06 18 14 06 =0834+250 05 48 59 50.7 74.6 -2.8 -88.7 50 F 1 5356 18 13 06 18 14 16 J0838+2453 05 49 09 50.7 74.6 -2.8 -88.7 5 1 3 5356 18 14 06 18 17 05 --- 05 51 59 51.3 74.6 -2.8 -89.0 170 F 1 6553 18 14 06 18 17 15 J0837+2454 05 52 09 51.5 74.6 -2.8 -89.0 4 1 3 6553 18 17 05 18 18 05 =0834+250 05 52 59 51.7 74.6 -2.7 -89.1 50 F 1 6952 18 17 05 18 18 15 J0838+2453 05 53 09 51.6 74.6 -2.8 -89.1 5 1 3 6952 18 18 05 18 21 05 --- 05 55 59 52.2 74.6 -2.7 -89.4 170 F 1 8149 18 18 05 18 21 14 J0837+2454 05 56 09 52.4 74.6 -2.7 -89.4 4 1 3 8149 18 21 05 18 22 04 =0834+250 05 56 59 52.6 74.6 -2.7 -89.5 50 F 1 8547 18 21 05 18 22 14 J0838+2453 05 57 09 52.5 74.6 -2.7 -89.5 5 1 3 8547 18 22 04 18 25 04 --- 05 59 59 53.1 74.6 -2.6 -89.8 170 F 1 9744 18 22 04 Schedule for VLBA_MK (Code Mk ) Page 6 BE042d; S/X observation of J0838+2453 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). SYNC: Time correlator is expected to sync up. 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) SYNC ---------------------------------------------------------------------------------------- --- Sat 20 Aug 2005 Day 232 --- 18 25 14 J0837+2454 06 00 09 53.3 74.6 -2.6 -89.9 4 1 3 9744 18 25 04 18 26 04 =0834+250 06 00 59 53.5 74.6 -2.6 -89.9 50 F 1 10143 18 25 04 18 26 14 J0838+2453 06 01 09 53.4 74.6 -2.6 -89.9 5 1 3 10143 18 26 04 18 29 03 --- 06 03 59 54.0 74.6 -2.6 -90.2 170 F 1 11340 18 26 04 18 29 13 J0837+2454 06 04 09 54.2 74.6 -2.6 -90.3 4 1 3 11340 18 29 03 18 30 03 =0834+250 06 04 59 54.4 74.6 -2.5 -90.4 50 F 1 11739 18 29 03 18 30 13 J0838+2453 06 05 09 54.3 74.6 -2.6 -90.3 5 1 3 11739 18 30 03 18 33 03 --- 06 07 59 54.9 74.6 -2.5 -90.6 170 F 1 12935 18 30 03 18 33 13 J0837+2454 06 08 09 55.1 74.6 -2.5 -90.7 4 1 3 12935 18 33 03 18 34 02 =0834+250 06 08 59 55.3 74.6 -2.5 -90.8 50 F 1 13334 18 33 03 18 34 12 J0838+2453 06 09 09 55.2 74.6 -2.5 -90.7 5 1 3 13334 18 34 02 18 37 02 --- 06 11 59 55.8 74.6 -2.4 -91.1 170 F 1 14531 18 34 02 18 37 12 J0837+2454 06 12 09 56.0 74.6 -2.4 -91.1 4 1 3 14531 18 37 02 18 38 02 =0834+250 06 12 59 56.2 74.6 -2.4 -91.2 50 F 1 14930 18 37 02 18 38 12 J0838+2453 06 13 09 56.1 74.6 -2.4 -91.2 5 1 3 14930 18 38 02 18 41 01 --- 06 15 59 56.8 74.6 -2.4 -91.5 170 F 1 16127 18 38 02 18 41 11 J0837+2454 06 16 09 56.9 74.5 -2.4 -91.6 4 1 3 16127 18 41 01 18 42 01 =0834+250 06 16 59 57.1 74.5 -2.3 -91.7 50 F 1 16526 18 41 01 18 42 11 J0838+2453 06 17 09 57.0 74.5 -2.4 -91.6 5 1 4 16526 18 42 01 18 45 01 --- 06 19 59 57.7 74.5 -2.3 -92.0 170 R 1 17478 18 42 01 18 45 11 J0837+2454 06 20 09 57.8 74.5 -2.3 -92.1 4 1 4 17478 18 45 01 18 46 00 =0834+250 06 20 59 58.0 74.5 -2.3 -92.2 50 R 1 17079 18 45 01 18 46 10 J0838+2453 06 21 09 57.9 74.5 -2.3 -92.1 5 1 4 17079 18 46 00 18 49 00 --- 06 23 59 58.6 74.4 -2.2 -92.4 170 R 1 15882 18 46 00 18 49 10 J0837+2454 06 24 09 58.7 74.4 -2.2 -92.5 4 1 4 15882 18 49 00 18 50 00 =0834+250 06 24 59 58.9 74.4 -2.2 -92.6 50 R 1 15483 18 49 00 18 50 10 J0838+2453 06 25 09 58.8 74.4 -2.2 -92.6 5 1 4 15483 18 50 00 18 52 59 --- 06 27 59 59.5 74.4 -2.2 -92.9 170 R 1 14286 18 50 00 Schedule for VLBA_MK (Code Mk ) Page 7 BE042d; S/X observation of J0838+2453 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). SYNC: Time correlator is expected to sync up. 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) SYNC ---------------------------------------------------------------------------------------- --- Sat 20 Aug 2005 Day 232 --- 18 53 09 J0837+2454 06 28 09 59.6 74.3 -2.2 -93.0 4 1 4 14286 18 52 59 18 53 59 =0834+250 06 28 59 59.8 74.3 -2.1 -93.1 50 R 1 13888 18 52 59 18 56 09 J0854+2006 06 31 09 56.2 83.2 -2.4 -84.2 116 1 4 13888 18 55 54 19 00 28 =0851+202 06 35 29 57.2 83.4 -2.3 -84.4 259 R 1 12059 18 56 07 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/vsx-128-4-2-R.set Matches group vsx_22 in /home/filehost/cwalker/sched/catalogs/freq.dat Setup group: 10 Station: VLBA_MK 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 used at high density at 80.000 ips. Time per pass is 44.00 minutes. 1st LO= 3100.00 3100.00 7600.00 7600.00 Net SB= U U U U Pol. = RCP RCP RCP RCP BBC = 1 2 3 4 BBC SB= L L U U IF = A A B B VLBA FE= 13cm 4cm 13cm 4cm VLBA Synth= 7.6 3.1 15.4 The following frequency sets based on this setup were used. Frequency Set: 10 Setup file default. Used pcal sets: 1 LO sum= 2262.49 2270.49 8412.49 8420.49 BBC fr= 837.51 829.51 812.49 820.49 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 SOURCE LIST -- BE042d; S/X observation of J0838+2453 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) * J0838+2453 08 35 13.074679 * 08 38 10.950000 08 38 29.568600 0.00 25 04 15.80443 * 24 53 42.86000 24 52 42.70410 0.00 From catalog imbedded in main SCHED input file. 1.601 scan hours, 72.053 baseline hours above horizon. * J0837+2454 08 34 42.314443 * 08 37 40.245685 08 37 58.870939 0.23 0834+250 25 04 54.32847 * 24 54 23.12160 24 53 23.15207 0.41 J0837+24 /home/filehost/cwalker/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.485 scan hours, 21.815 baseline hours above horizon. * J0854+2006 08 51 57.250617 * 08 54 48.874929 08 55 06.795238 0.21 0851+202 20 17 58.41740 * 20 06 30.64085 20 05 25.09792 0.40 J0854+20 /home/filehost/cwalker/sched/catalogs/sources.vlba OJ287 VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.144 scan hours, 6.482 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) J0838+2453 23.0 J0837+2454 23.1 J0854+2006 17.4 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