COVER INFORMATION Station: VLBA_KP (Code Kp ) Experiment: Monitoring OH outburst in PPN OH17.7-2.0 - second epoch Exp. Code: BS166B Schedule Version: 1.00 Processed by SCHED version: 6.05 June 2006 PI: Marian Szymczak Address: Torun Centre for Astronomy ul. Gagarina 11, Torun, PL-87100 Poland Phone: +48 56 6113029 EMAIL: msz@astro.uni.torun.pl Fax: +48 56 6113009 Phone during observation: +48 56 6113010 Observing mode: Full polarization observations of the 1612 MHz OH masers Notes: Please, make sure PHASE CAL is OFF. Schedule for VLBA_KP (Code Kp ) Page 2 Monitoring OH outburst in PPN OH17.7-2.0 - second epoch 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. For disks, the footages are really the GBytes 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 ---------------------------------------------------------------------------------------- --- Wed 28 Feb 2007 Day 59 --- Next scan frequencies: 1611.68 1611.68 1611.55 1611.55 Next BBC frequencies: 788.32 788.32 788.45 788.45 Next scan bandwidths: 1.00 1.00 1.00 1.00 09 01 15 3C286_W 12 06 02 71.7 89.0 -1.4 -79.8 0 1 1 0 09 01 15 09 33 10 --- 12 38 02 78.5 93.9 -0.9 -79.1 1915 F 1 4 09 01 50 Next scan frequencies: 1612.15 1612.15 1612.02 1612.02 Next BBC frequencies: 787.85 787.85 787.98 787.98 Next scan bandwidths: 0.06 0.06 0.06 0.06 09 33 10 3C286_N 12 38 02 78.5 93.9 -0.9 -79.1 -4 1 1 4 09 33 10 10 07 04 --- 13 12 02 85.6 108.4 -0.3 -69.1 2030 F 1 8 09 33 10 10 07 04 3C345_N 13 12 02 47.1 64.1 -3.5 -83.4 -83 1 1 8 10 07 04 10 33 00 --- 13 38 02 52.1 64.7 -3.1 -87.1 1473 F 1 11 10 07 04 Next scan frequencies: 1611.68 1611.68 1611.55 1611.55 Next BBC frequencies: 788.32 788.32 788.45 788.45 Next scan bandwidths: 1.00 1.00 1.00 1.00 10 33 00 3C345_W 13 38 02 52.1 64.7 -3.1 -87.1 -4 1 1 11 10 33 00 10 58 56 --- 14 04 02 57.1 64.9 -2.7 -91.1 1552 F 1 14 10 33 00 10 58 56 J1733_W 14 04 02 22.6 123.3 -3.5 -46.7 -75 1 1 14 10 58 56 11 03 55 --- 14 09 02 23.5 124.2 -3.4 -46.1 224 F 1 15 10 58 56 Next scan frequencies: 1612.15 1612.15 1612.02 1612.02 Next BBC frequencies: 787.85 787.85 787.98 787.98 Next scan bandwidths: 0.06 0.06 0.06 0.06 11 03 55 J1733_N 14 09 02 23.5 124.2 -3.4 -46.1 -4 1 1 15 11 03 55 11 11 54 --- 14 17 02 24.9 125.7 -3.3 -45.0 475 F 1 16 11 03 55 11 11 54 OH17.7-2.0 14 17 02 13.6 117.0 -4.2 -51.3 -29 1 1 16 11 11 54 11 24 52 --- 14 30 02 16.0 119.0 -4.0 -50.0 749 F 1 17 11 11 54 11 24 52 OH17.7-2.0 14 30 02 16.0 119.0 -4.0 -50.0 -4 1 1 17 11 24 52 11 37 49 --- 14 43 02 18.4 121.2 -3.8 -48.6 774 F 1 19 11 24 52 Schedule for VLBA_KP (Code Kp ) Page 3 Monitoring OH outburst in PPN OH17.7-2.0 - second epoch 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. For disks, the footages are really the GBytes 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 ---------------------------------------------------------------------------------------- --- Wed 28 Feb 2007 Day 59 --- 11 37 49 OH17.7-2.0 14 43 02 18.4 121.2 -3.8 -48.6 -4 1 1 19 11 37 49 11 50 47 --- 14 56 02 20.7 123.4 -3.6 -47.0 774 F 1 21 11 37 49 Next scan frequencies: 1611.68 1611.68 1611.55 1611.55 Next BBC frequencies: 788.32 788.32 788.45 788.45 Next scan bandwidths: 1.00 1.00 1.00 1.00 11 50 47 J1733_W 14 56 02 31.3 133.7 -2.6 -39.0 -27 1 1 21 11 50 47 11 55 46 --- 15 01 02 32.0 134.8 -2.5 -38.1 272 F 1 21 11 50 47 Next scan frequencies: 1612.15 1612.15 1612.02 1612.02 Next BBC frequencies: 787.85 787.85 787.98 787.98 Next scan bandwidths: 0.06 0.06 0.06 0.06 11 55 46 J1733_N 15 01 02 32.0 134.8 -2.5 -38.1 -4 1 1 21 11 55 46 12 03 45 --- 15 09 02 33.2 136.7 -2.4 -36.7 475 F 1 22 11 55 46 12 05 45 OH17.7-2.0 15 11 02 23.3 126.2 -3.3 -45.0 94 1 1 22 12 05 45 12 18 43 --- 15 24 02 25.5 128.6 -3.1 -43.2 778 F 1 24 12 06 20 12 18 43 OH17.7-2.0 15 24 02 25.5 128.6 -3.1 -43.2 -4 1 1 24 12 18 43 12 31 41 --- 15 37 02 27.6 131.2 -2.9 -41.2 774 F 1 25 12 18 43 12 31 41 OH17.7-2.0 15 37 02 27.6 131.2 -2.9 -41.2 -4 1 1 25 12 31 41 12 44 38 --- 15 50 02 29.7 134.0 -2.7 -39.1 774 F 1 27 12 31 41 Next scan frequencies: 1611.68 1611.68 1611.55 1611.55 Next BBC frequencies: 788.32 788.32 788.45 788.45 Next scan bandwidths: 1.00 1.00 1.00 1.00 12 44 38 J1733_W 15 50 02 38.6 147.1 -1.7 -28.3 -24 1 1 27 12 44 38 12 49 38 --- 15 55 02 39.2 148.5 -1.6 -27.1 275 F 1 27 12 44 38 Next scan frequencies: 1612.15 1612.15 1612.02 1612.02 Next BBC frequencies: 787.85 787.85 787.98 787.98 Next scan bandwidths: 0.06 0.06 0.06 0.06 12 49 38 J1733_N 15 55 02 39.2 148.5 -1.6 -27.1 -4 1 1 27 12 49 38 12 57 36 --- 16 03 02 40.0 150.7 -1.5 -25.2 475 F 1 28 12 49 38 Schedule for VLBA_KP (Code Kp ) Page 4 Monitoring OH outburst in PPN OH17.7-2.0 - second epoch 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. For disks, the footages are really the GBytes 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 ---------------------------------------------------------------------------------------- --- Wed 28 Feb 2007 Day 59 --- 12 57 36 3C286_N 16 03 02 57.7 277.5 2.5 77.4 -91 1 1 28 12 57 36 13 23 32 --- 16 29 02 52.3 279.8 3.0 75.9 1465 F 1 31 12 57 36 Next scan frequencies: 1611.68 1611.68 1611.55 1611.55 Next BBC frequencies: 788.32 788.32 788.45 788.45 Next scan bandwidths: 1.00 1.00 1.00 1.00 13 23 32 3C286_W 16 29 02 52.3 279.8 3.0 75.9 -4 1 1 31 13 23 32 13 49 28 --- 16 55 02 46.9 282.0 3.4 74.3 1552 F 1 35 13 23 32 13 49 28 J1733_W 16 55 02 44.0 166.9 -0.6 -11.4 -83 1 1 35 13 49 28 13 54 27 --- 17 00 02 44.2 168.6 -0.6 -9.9 216 F 1 35 13 49 28 Next scan frequencies: 1612.15 1612.15 1612.02 1612.02 Next BBC frequencies: 787.85 787.85 787.98 787.98 Next scan bandwidths: 0.06 0.06 0.06 0.06 13 54 27 J1733_N 17 00 02 44.2 168.6 -0.6 -9.9 -4 1 1 35 13 54 27 14 02 26 --- 17 08 02 44.5 171.3 -0.4 -7.6 475 F 1 36 13 54 27 14 04 25 OH17.7-2.0 17 10 02 39.7 154.2 -1.3 -22.4 102 1 1 36 14 04 25 14 17 23 --- 17 23 02 40.8 158.1 -1.1 -19.1 778 F 1 38 14 05 00 14 17 23 OH17.7-2.0 17 23 02 40.8 158.1 -1.1 -19.1 -4 1 1 38 14 17 23 14 30 21 --- 17 36 02 41.7 162.1 -0.9 -15.6 774 F 1 39 14 17 23 14 30 21 OH17.7-2.0 17 36 02 41.7 162.1 -0.9 -15.6 -4 1 1 39 14 30 21 14 43 19 --- 17 49 02 42.5 166.2 -0.7 -12.1 774 F 1 41 14 30 21 Next scan frequencies: 1611.68 1611.68 1611.55 1611.55 Next BBC frequencies: 788.32 788.32 788.45 788.45 Next scan bandwidths: 1.00 1.00 1.00 1.00 14 43 19 J1733_W 17 49 02 44.8 185.3 0.3 4.7 -19 1 1 41 14 43 19 14 48 18 --- 17 54 02 44.7 187.1 0.3 6.1 280 F 1 41 14 43 19 Schedule for VLBA_KP (Code Kp ) Page 5 Monitoring OH outburst in PPN OH17.7-2.0 - second epoch 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. For disks, the footages are really the GBytes 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 ---------------------------------------------------------------------------------------- --- Wed 28 Feb 2007 Day 59 --- Next scan frequencies: 1612.15 1612.15 1612.02 1612.02 Next BBC frequencies: 787.85 787.85 787.98 787.98 Next scan bandwidths: 0.06 0.06 0.06 0.06 14 48 18 J1733_N 17 54 02 44.7 187.1 0.3 6.1 -4 1 1 41 14 48 18 14 56 17 --- 18 02 02 44.4 189.8 0.5 8.5 475 F 1 42 14 48 18 14 56 17 OH17.7-2.0 18 02 02 43.1 170.4 -0.5 -8.4 -19 1 1 42 14 56 17 15 09 15 --- 18 15 02 43.4 174.7 -0.3 -4.6 759 F 1 44 14 56 17 15 09 15 OH17.7-2.0 18 15 02 43.4 174.7 -0.3 -4.6 -4 1 1 44 15 09 15 15 22 13 --- 18 28 02 43.6 179.0 0.0 -0.8 774 F 1 46 15 09 15 15 22 13 OH17.7-2.0 18 28 02 43.6 179.0 0.0 -0.8 -4 1 1 46 15 22 13 15 35 10 --- 18 41 02 43.5 183.4 0.2 3.0 774 F 1 47 15 22 13 Next scan frequencies: 1611.68 1611.68 1611.55 1611.55 Next BBC frequencies: 788.32 788.32 788.45 788.45 Next scan bandwidths: 1.00 1.00 1.00 1.00 15 35 10 J1733_W 18 41 02 42.1 202.4 1.1 19.4 -19 1 1 47 15 35 10 15 40 10 --- 18 46 02 41.7 204.0 1.2 20.7 280 F 1 48 15 35 10 Next scan frequencies: 1612.15 1612.15 1612.02 1612.02 Next BBC frequencies: 787.85 787.85 787.98 787.98 Next scan bandwidths: 0.06 0.06 0.06 0.06 15 40 10 J1733_N 18 46 02 41.7 204.0 1.2 20.7 -4 1 1 48 15 40 10 15 48 08 --- 18 54 02 41.0 206.4 1.3 22.8 475 F 1 49 15 40 10 15 50 08 OH17.7-2.0 18 56 02 43.2 188.3 0.4 7.3 102 1 1 49 15 50 08 16 03 06 --- 19 09 02 42.7 192.6 0.6 11.0 778 F 1 50 15 50 43 16 03 06 OH17.7-2.0 19 09 02 42.7 192.6 0.6 11.0 -4 1 1 50 16 03 06 16 16 04 --- 19 22 02 42.0 196.7 0.9 14.6 774 F 1 52 16 03 06 16 16 04 OH17.7-2.0 19 22 02 42.0 196.7 0.9 14.6 -4 1 1 52 16 16 04 16 29 02 --- 19 35 02 41.1 200.8 1.1 18.1 774 F 1 53 16 16 04 Schedule for VLBA_KP (Code Kp ) Page 6 Monitoring OH outburst in PPN OH17.7-2.0 - second epoch 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. For disks, the footages are really the GBytes 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 ---------------------------------------------------------------------------------------- --- Wed 28 Feb 2007 Day 59 --- Next scan frequencies: 1611.68 1611.68 1611.55 1611.55 Next BBC frequencies: 788.32 788.32 788.45 788.45 Next scan bandwidths: 1.00 1.00 1.00 1.00 16 29 02 J1733_W 19 35 02 36.4 217.7 2.0 32.2 -17 1 1 53 16 29 02 16 34 01 --- 19 40 02 35.7 219.0 2.1 33.2 282 F 1 54 16 29 02 Next scan frequencies: 1612.15 1612.15 1612.02 1612.02 Next BBC frequencies: 787.85 787.85 787.98 787.98 Next scan bandwidths: 0.06 0.06 0.06 0.06 16 34 01 J1733_N 19 40 02 35.7 219.0 2.1 33.2 -4 1 1 54 16 34 01 16 41 59 --- 19 48 02 34.6 221.0 2.2 34.8 475 F 1 55 16 34 01 16 41 59 OH17.7-2.0 19 48 02 40.0 204.7 1.3 21.5 -17 1 1 55 16 41 59 16 54 57 --- 20 01 02 38.8 208.4 1.5 24.6 761 F 1 57 16 41 59 16 54 57 OH17.7-2.0 20 01 02 38.8 208.4 1.5 24.6 -4 1 1 57 16 54 57 17 07 55 --- 20 14 02 37.4 212.0 1.7 27.7 774 F 1 58 16 54 57 17 07 55 OH17.7-2.0 20 14 02 37.4 212.0 1.7 27.7 -4 1 1 58 17 07 55 17 20 53 --- 20 27 02 35.9 215.4 1.9 30.5 774 F 1 60 17 07 55 Next scan frequencies: 1611.68 1611.68 1611.55 1611.55 Next BBC frequencies: 788.32 788.32 788.45 788.45 Next scan bandwidths: 1.00 1.00 1.00 1.00 17 20 53 J1733_W 20 27 02 28.7 229.7 2.9 41.7 -20 1 1 60 17 20 53 17 25 52 --- 20 32 02 27.9 230.8 3.0 42.4 279 F 1 60 17 20 53 Next scan frequencies: 1612.15 1612.15 1612.02 1612.02 Next BBC frequencies: 787.85 787.85 787.98 787.98 Next scan bandwidths: 0.06 0.06 0.06 0.06 17 25 52 J1733_N 20 32 02 27.9 230.8 3.0 42.4 -4 1 1 60 17 25 52 17 33 51 --- 20 40 02 26.6 232.4 3.1 43.6 475 F 1 61 17 25 52 17 35 51 OH17.7-2.0 20 42 02 33.9 219.2 2.2 33.6 99 1 1 61 17 35 51 17 48 48 --- 20 55 02 32.1 222.3 2.4 36.1 778 F 1 63 17 36 26 Schedule for VLBA_KP (Code Kp ) Page 7 Monitoring OH outburst in PPN OH17.7-2.0 - second epoch 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. For disks, the footages are really the GBytes 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 ---------------------------------------------------------------------------------------- --- Wed 28 Feb 2007 Day 59 --- 17 48 48 OH17.7-2.0 20 55 02 32.1 222.3 2.4 36.1 -4 1 1 63 17 48 48 18 01 46 --- 21 08 02 30.2 225.2 2.6 38.4 774 F 1 64 17 48 48 18 01 46 OH17.7-2.0 21 08 02 30.2 225.2 2.6 38.4 -4 1 1 64 18 01 46 18 14 44 --- 21 21 02 28.2 228.0 2.8 40.6 774 F 1 66 18 01 46 Next scan frequencies: 1611.68 1611.68 1611.55 1611.55 Next BBC frequencies: 788.32 788.32 788.45 788.45 Next scan bandwidths: 1.00 1.00 1.00 1.00 18 14 44 J1733_W 21 21 02 19.4 239.9 3.8 48.9 -24 1 1 66 18 14 44 18 19 43 --- 21 26 02 18.4 240.7 3.9 49.4 275 F 1 67 18 14 44 Next scan frequencies: 1612.15 1612.15 1612.02 1612.02 Next BBC frequencies: 787.85 787.85 787.98 787.98 Next scan bandwidths: 0.06 0.06 0.06 0.06 18 19 43 J1733_N 21 26 02 18.4 240.7 3.9 49.4 -4 1 1 67 18 19 43 18 27 42 --- 21 34 02 17.0 242.0 4.0 50.3 475 F 1 68 18 19 43 18 27 42 OH17.7-2.0 21 34 02 26.1 230.6 3.1 42.6 -24 1 1 68 18 27 42 18 40 40 --- 21 47 02 24.0 233.1 3.3 44.5 753 F 1 69 18 27 42 18 40 40 OH17.7-2.0 21 47 02 24.0 233.1 3.3 44.5 -4 1 1 69 18 40 40 18 53 38 --- 22 00 02 21.7 235.5 3.5 46.3 774 F 1 71 18 40 40 18 53 38 OH17.7-2.0 22 00 02 21.7 235.5 3.5 46.3 -4 1 1 71 18 53 38 19 06 36 --- 22 13 02 19.4 237.8 3.7 47.9 774 F 1 72 18 53 38 Next scan frequencies: 1611.68 1611.68 1611.55 1611.55 Next BBC frequencies: 788.32 788.32 788.45 788.45 Next scan bandwidths: 1.00 1.00 1.00 1.00 19 08 35 2253_W 22 15 02 71.9 148.2 -0.7 -27.7 9 1 1 72 19 08 35 19 51 28 --- 22 58 02 74.2 183.3 0.1 2.9 2573 F 1 77 19 09 10 Schedule for VLBA_KP (Code Kp ) Page 8 Monitoring OH outburst in PPN OH17.7-2.0 - second epoch 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. For disks, the footages are really the GBytes 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 ---------------------------------------------------------------------------------------- --- Wed 28 Feb 2007 Day 59 --- Next scan frequencies: 1612.15 1612.15 1612.02 1612.02 Next BBC frequencies: 787.85 787.85 787.98 787.98 Next scan bandwidths: 0.06 0.06 0.06 0.06 19 51 28 2253_N 22 58 02 74.2 183.3 0.1 2.9 -4 1 1 77 19 51 28 21 00 17 --- 00 07 02 67.2 230.6 1.2 43.0 4125 F 1 86 19 51 28 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: bs166wide.set Matches group v20cm_2 in /home/filehost/cwalker/sched/catalogs/freq.dat FD filtered above 1760. SC filtered above 1740. Setup group: 17 Station: VLBA_KP Total bit rate: 16 Format: VLBA1:1 Bits per sample: 2 Sample rate: 2.000 Number of channels: 4 Speedup factor: 4.00 Disk used to record data. 1st LO= 2400.00 2400.00 2400.00 2400.00 Net SB= U U U U Pol. = LCP RCP LCP RCP BBC = 1 2 3 4 BBC SB= L L L L IF = C A C A 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: 7 Based on FREQ, BW, and/or DOPPLER in schedule. Used pcal sets: 1 LO sum= 1611.68 1611.68 1611.55 1611.55 BBC fr= 788.32 788.32 788.45 788.45 Bandwd= 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 OFF OFF OFF OFF PCALXB2= M1 M2 M3 M4 OFF OFF OFF OFF 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 barrel=roll_off Setup file: bs166narrow.set Matches group v20cm_2 in /home/filehost/cwalker/sched/catalogs/freq.dat FD filtered above 1760. SC filtered above 1740. Setup group: 7 Station: VLBA_KP Total bit rate: 16 Format: VLBA1:1 Bits per sample: 2 Sample rate: 2.000 Number of channels: 4 Speedup factor: 4.00 Disk used to record data. 1st LO= 2400.00 2400.00 2400.00 2400.00 Net SB= U U U U Pol. = LCP RCP LCP RCP BBC = 1 2 3 4 BBC SB= L L L L IF = C A C A 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: 17 Based on FREQ, BW, and/or DOPPLER in schedule. Used pcal sets: 1 LO sum= 1612.15 1612.15 1612.02 1612.02 BBC fr= 787.85 787.85 787.98 787.98 Bandwd= 0.062 0.062 0.062 0.062 The following pulse cal sets were used with this setup: Pulse cal detection set: 1 PCAL = OFF PCALXB1= S1 S2 S3 S4 OFF OFF OFF OFF PCALXB2= M1 M2 M3 M4 OFF OFF OFF OFF 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 barrel=roll_off SOURCE LIST -- Monitoring OH outburst in PPN OH17.7-2.0 - second epoch 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) * OH17.7-2.0 18 27 39.767201 * 18 30 30.695000 18 30 54.853929 0.00 -14 31 03.68772 *-14 28 56.82000 -14 28 49.81780 0.00 From catalog imbedded in main SCHED input file. Doppler based on LSR frame and radio definition. Velocities: 50.00 50.00 73.00 73.00 5.186 scan hours, 191.385 baseline hours above horizon. * 3C345_W 16 41 17.606231 * 16 42 58.809968 16 43 13.562082 0.00 39 54 10.81493 * 39 48 36.99399 39 47 22.18962 0.00 From catalog imbedded in main SCHED input file. Doppler based on other sources. 0.432 scan hours, 19.397 baseline hours above horizon. * 3C345_N 16 41 17.606231 * 16 42 58.809968 16 43 13.562082 0.00 39 54 10.81493 * 39 48 36.99399 39 47 22.18962 0.00 From catalog imbedded in main SCHED input file. Doppler based on other sources. 0.432 scan hours, 18.262 baseline hours above horizon. * 3C286_W 13 28 49.657757 * 13 31 08.288049 13 31 29.770269 0.00 30 45 58.64062 * 30 30 32.95926 30 28 01.60395 0.00 From catalog imbedded in main SCHED input file. Doppler based on other sources. 0.964 scan hours, 43.331 baseline hours above horizon. * 3C286_N 13 28 49.657757 * 13 31 08.288049 13 31 29.770269 0.00 30 45 58.64062 * 30 30 32.95926 30 28 01.60395 0.00 From catalog imbedded in main SCHED input file. Doppler based on other sources. 0.997 scan hours, 43.647 baseline hours above horizon. * J1733_W 17 30 13.535187 * 17 33 02.705785 17 33 26.888381 0.00 -13 02 45.83975 *-13 04 49.54823 -13 05 18.96688 0.00 From catalog imbedded in main SCHED input file. Doppler based on other sources. 0.748 scan hours, 23.453 baseline hours above horizon. * J1733_N 17 30 13.535187 * 17 33 02.705785 17 33 26.888381 0.00 -13 02 45.83975 *-13 04 49.54823 -13 05 18.96688 0.00 From catalog imbedded in main SCHED input file. Doppler based on other sources. 1.197 scan hours, 44.568 baseline hours above horizon. * 2253_W 22 51 29.519743 * 22 53 57.747942 22 54 17.787359 0.00 15 52 54.34803 * 16 08 53.56086 16 11 03.82311 0.00 From catalog imbedded in main SCHED input file. Doppler based on other sources. 0.715 scan hours, 32.141 baseline hours above horizon. * 2253_N 22 51 29.519743 * 22 53 57.747942 22 54 17.787359 0.00 15 52 54.34803 * 16 08 53.56086 16 11 03.82311 0.00 From catalog imbedded in main SCHED input file. Doppler based on other sources. 1.147 scan hours, 51.559 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) OH17.7-2.0 62.4 3C345_W 95.4 3C345_N 95.4 3C286_W 135.1 3C286_N 135.1 J1733_W 76.4 J1733_N 76.4 2253_W 24.3 2253_N 24.3 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