COVER INFORMATION Station: GBT_VLBA (Code Gb ) Experiment: Water Megamaser in the LINER IC1481, Nakai etc Exp. Code: BN032 Schedule Version: 1.00 Processed by SCHED version: 6.01 Release: Late March 2005 PI: NAKAI N. Address: Institute of Physics, University of Tsukuba Tsukuba, Ibaraki 305-8571 Japan Phone: 81 29 853 4281 EMAIL: nakai@physics.px.tsukuba.ac.jp Fax: 81 29 853 6618 Phone during observation: 81 29 853 4281 Observing mode: 1.3cm, line Notes: fringe finder, manual pcal: 3c454.3 phase reference source : 2320+052, 2334++076 amplitude check source : 3c286 Schedule for GBT_VLBA (Code Gb ) Page 2 Water Megamaser in the LINER IC1481, Nakai etc 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) ---------------------------------------------------------------------------------------- --- Sat 23 Apr 2005 Day 113 --- Next scan frequencies: 21779.62 21791.48 21799.64 21807.06 Next BBC frequencies: 729.62 741.48 749.64 757.06 Next scan bandwidths: 8.00 8.00 8.00 8.00 11 05 00 3C286 19 52 01 14.8 -62.6 6.3 53.8 0 1 1 0 11 05 00 11 15 00 --- 20 02 02 13.0 -61.2 6.5 52.8 600 F 1 4000 11 19 00 3C454.3 20 06 03 47.0 109.3 -2.8 -50.3 -76 1 1 4000 11 19 00 11 29 00 --- 20 16 05 48.9 111.6 -2.6 -49.3 524 F 1 8000 11 30 00 2334+076 20 17 05 36.0 111.6 -3.3 -47.3 -9 1 1 8000 11 30 00 11 33 00 --- 20 20 05 36.6 112.2 -3.2 -47.0 171 F 1 9200 11 33 00 IC1481 20 20 05 38.0 117.0 -3.0 -44.6 -40 1 1 9200 11 33 00 11 41 00 --- 20 28 07 39.4 118.8 -2.9 -43.6 440 F 1 12400 11 41 00 2320+052 20 28 07 38.7 119.1 -2.9 -43.4 -28 1 1 12400 11 41 00 11 44 00 --- 20 31 07 39.2 119.8 -2.8 -43.1 152 F 1 13600 11 44 00 IC1481 20 31 07 39.9 119.5 -2.8 -43.3 -28 1 1 13600 11 44 00 11 52 00 --- 20 39 09 41.3 121.4 -2.7 -42.2 452 F 1 16800 11 52 00 2320+052 20 39 09 40.6 121.7 -2.7 -42.0 -28 1 2 16800 11 52 00 11 55 00 --- 20 42 09 41.1 122.4 -2.6 -41.6 152 R 1 17200 11 55 00 IC1481 20 42 09 41.8 122.2 -2.6 -41.8 -28 1 2 17200 11 55 00 12 03 00 --- 20 50 10 43.1 124.2 -2.5 -40.6 452 R 1 14000 12 03 00 2320+052 20 50 10 42.4 124.5 -2.5 -40.4 -28 1 2 14000 12 03 00 12 06 00 --- 20 53 11 42.9 125.2 -2.5 -40.0 152 R 1 12800 12 06 00 IC1481 20 53 11 43.6 125.0 -2.4 -40.2 -28 1 2 12800 12 06 00 12 14 00 --- 21 01 12 44.9 127.1 -2.3 -38.9 452 R 1 9600 12 14 00 2320+052 21 01 12 44.1 127.4 -2.3 -38.7 -28 1 2 9600 12 14 00 12 17 00 --- 21 04 13 44.6 128.2 -2.3 -38.2 152 R 1 8400 12 17 00 IC1481 21 04 13 45.3 128.0 -2.3 -38.4 -28 1 2 8400 12 17 00 12 25 00 --- 21 12 14 46.6 130.2 -2.1 -37.0 452 R 1 5200 12 25 00 2320+052 21 12 14 45.8 130.4 -2.1 -36.8 -28 1 2 5200 12 25 00 12 28 00 --- 21 15 14 46.3 131.3 -2.1 -36.2 152 R 1 4000 Schedule for GBT_VLBA (Code Gb ) Page 3 Water Megamaser in the LINER IC1481, Nakai etc 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) ---------------------------------------------------------------------------------------- --- Sat 23 Apr 2005 Day 113 --- 12 28 00 IC1481 21 15 14 47.0 131.1 -2.1 -36.4 -28 1 2 4000 12 28 00 12 36 00 --- 21 23 16 48.2 133.5 -1.9 -34.8 452 R 1 800 12 51 00 3C454.3 21 38 18 62.2 138.0 -1.3 -33.1 827 1 3 800 12 51 00 13 02 00 --- 21 49 20 63.6 142.9 -1.1 -29.4 660 F 1 3600 13 03 00 2334+076 21 50 20 51.3 135.9 -1.7 -33.3 -7 1 3 3600 13 03 00 13 06 00 --- 21 53 21 51.7 136.9 -1.7 -32.7 173 F 1 4800 13 06 00 IC1481 21 53 21 52.1 143.5 -1.4 -27.9 -43 1 3 4800 13 06 00 13 14 00 --- 22 01 22 53.0 146.4 -1.3 -25.8 437 F 1 8000 13 14 00 2320+052 22 01 22 52.2 146.4 -1.3 -25.8 -28 1 3 8000 13 14 00 13 17 00 --- 22 04 22 52.5 147.5 -1.3 -25.0 152 F 1 9200 13 17 00 IC1481 22 04 22 53.3 147.5 -1.3 -25.0 -28 1 3 9200 13 17 00 13 25 00 --- 22 12 24 54.1 150.6 -1.1 -22.7 452 F 1 12400 13 25 00 2320+052 22 12 24 53.4 150.5 -1.1 -22.8 -28 1 3 12400 13 25 00 13 28 00 --- 22 15 24 53.6 151.7 -1.1 -21.9 152 F 1 13600 13 28 00 IC1481 22 15 24 54.4 151.8 -1.1 -21.9 -28 1 3 13600 13 28 00 13 36 00 --- 22 23 26 55.1 155.0 -0.9 -19.4 452 F 1 16800 13 36 00 2320+052 22 23 26 54.3 154.9 -1.0 -19.5 -28 1 4 16800 13 36 00 13 39 00 --- 22 26 26 54.6 156.1 -0.9 -18.6 152 R 1 17200 13 39 00 IC1481 22 26 26 55.3 156.3 -0.9 -18.5 -28 1 4 17200 13 39 00 13 47 00 --- 22 34 27 55.9 159.6 -0.8 -15.9 452 R 1 14000 13 47 00 2320+052 22 34 27 55.2 159.4 -0.8 -16.1 -28 1 4 14000 13 47 00 13 50 00 --- 22 37 28 55.4 160.7 -0.7 -15.1 152 R 1 12800 13 50 00 IC1481 22 37 28 56.1 160.9 -0.7 -14.9 -28 1 4 12800 13 50 00 13 58 00 --- 22 45 29 56.6 164.4 -0.6 -12.2 452 R 1 9600 13 58 00 2320+052 22 45 29 55.9 164.1 -0.6 -12.4 -28 1 4 9600 13 58 00 14 01 00 --- 22 48 30 56.0 165.4 -0.5 -11.4 152 R 1 8400 14 01 00 IC1481 22 48 30 56.7 165.8 -0.5 -11.2 -28 1 4 8400 14 01 00 14 09 00 --- 22 56 31 57.1 169.4 -0.4 -8.4 452 R 1 5200 Schedule for GBT_VLBA (Code Gb ) Page 4 Water Megamaser in the LINER IC1481, Nakai etc 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) ---------------------------------------------------------------------------------------- --- Sat 23 Apr 2005 Day 113 --- 14 09 00 2320+052 22 56 31 56.4 169.0 -0.4 -8.7 -28 1 4 5200 14 09 00 14 12 00 --- 22 59 32 56.5 170.3 -0.4 -7.6 152 R 1 4000 14 12 00 IC1481 22 59 32 57.2 170.7 -0.3 -7.3 -28 1 4 4000 14 12 00 14 20 00 --- 23 07 33 57.4 174.4 -0.2 -4.4 452 R 1 800 14 20 00 2320+052 23 07 33 56.7 173.9 -0.2 -4.8 -27 1 5 800 14 20 00 14 23 00 --- 23 10 33 56.7 175.3 -0.2 -3.7 153 F 1 400 14 23 00 IC1481 23 10 33 57.4 175.8 -0.2 -3.3 -27 1 5 400 14 23 00 14 31 00 --- 23 18 35 57.5 179.5 0.0 -0.4 453 F 1 3600 14 46 00 3C454.3 23 33 37 66.1 204.0 0.7 19.3 827 1 5 3600 14 46 00 14 57 00 --- 23 44 39 65.1 209.9 0.8 24.0 660 F 1 8000 14 58 00 2334+076 23 45 39 59.1 185.4 0.2 4.3 -13 1 5 8000 14 58 00 15 01 00 --- 23 48 40 59.0 186.9 0.2 5.4 167 F 1 9200 15 01 00 IC1481 23 48 40 56.8 193.3 0.5 10.4 -43 1 5 9200 15 01 00 15 09 00 --- 23 56 41 56.4 196.8 0.6 13.2 437 F 1 12400 15 09 00 2320+052 23 56 41 55.8 196.0 0.6 12.5 -28 1 5 12400 15 09 00 15 12 00 --- 23 59 41 55.7 197.3 0.6 13.5 152 F 1 13600 15 12 00 IC1481 23 59 41 56.3 198.1 0.7 14.2 -28 1 5 13600 15 12 00 15 20 00 --- 00 07 43 55.7 201.6 0.8 16.8 452 F 1 16800 15 20 00 2320+052 00 07 43 55.2 200.7 0.8 16.1 -28 1 6 16800 15 20 00 15 23 00 --- 00 10 43 55.0 201.9 0.8 17.1 152 R 1 17200 15 23 00 IC1481 00 10 43 55.5 202.8 0.9 17.8 -29 1 6 17200 15 23 00 15 31 00 --- 00 18 45 54.8 206.1 1.0 20.3 451 R 1 14000 15 31 00 2320+052 00 18 45 54.3 205.2 1.0 19.6 -29 1 6 14000 15 31 00 15 34 00 --- 00 21 45 54.1 206.4 1.0 20.5 151 R 1 12800 15 34 00 IC1481 00 21 45 54.6 207.3 1.0 21.2 -29 1 6 12800 15 34 00 15 42 00 --- 00 29 46 53.8 210.5 1.2 23.6 451 R 1 9600 15 42 00 2320+052 00 29 46 53.3 209.5 1.1 22.8 -29 1 6 9600 15 42 00 15 45 00 --- 00 32 47 53.0 210.7 1.2 23.7 151 R 1 8400 Schedule for GBT_VLBA (Code Gb ) Page 5 Water Megamaser in the LINER IC1481, Nakai etc 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) ---------------------------------------------------------------------------------------- --- Sat 23 Apr 2005 Day 113 --- 15 45 00 IC1481 00 32 47 53.5 211.6 1.2 24.4 -29 1 6 8400 15 45 00 15 53 00 --- 00 40 48 52.7 214.6 1.4 26.6 451 R 1 5200 15 53 00 2320+052 00 40 48 52.2 213.7 1.3 25.9 -29 1 6 5200 15 53 00 15 56 00 --- 00 43 49 51.9 214.8 1.4 26.6 151 R 1 4000 15 56 00 IC1481 00 43 49 52.3 215.7 1.4 27.4 -29 1 6 4000 15 56 00 16 04 00 --- 00 51 50 51.4 218.6 1.5 29.4 451 R 1 800 16 04 00 2320+052 00 51 50 50.9 217.6 1.5 28.7 -29 1 7 800 16 04 00 16 07 00 --- 00 54 50 50.6 218.6 1.6 29.4 151 F 1 400 16 07 00 IC1481 00 54 50 51.0 219.6 1.6 30.1 -29 1 7 400 16 07 00 16 15 00 --- 01 02 52 50.0 222.3 1.7 32.0 451 F 1 3600 16 15 00 2320+052 01 02 52 49.6 221.3 1.7 31.3 -29 1 7 3600 16 15 00 16 18 00 --- 01 05 52 49.2 222.3 1.7 32.0 151 F 1 4800 16 18 00 IC1481 01 05 52 49.6 223.3 1.8 32.7 -29 1 7 4800 16 18 00 16 26 00 --- 01 13 54 48.5 225.8 1.9 34.4 451 F 1 8000 16 41 00 3C454.3 01 28 56 49.5 247.6 2.6 48.9 832 1 7 8000 16 41 00 16 52 00 --- 01 39 58 47.5 250.2 2.8 50.1 660 F 1 12400 16 53 00 2334+076 01 40 58 48.0 231.0 2.1 37.9 -4 1 7 12400 16 53 00 16 56 00 --- 01 43 58 47.6 231.9 2.2 38.5 176 F 1 13600 16 56 00 IC1481 01 43 58 43.9 234.4 2.4 39.8 -38 1 7 13600 16 56 00 17 04 00 --- 01 52 00 42.6 236.5 2.5 41.1 442 F 1 16800 17 04 00 2320+052 01 52 00 42.4 235.6 2.5 40.5 -29 1 8 16800 17 04 00 17 07 00 --- 01 55 00 41.9 236.4 2.6 40.9 151 R 1 17200 17 07 00 IC1481 01 55 00 42.2 237.3 2.6 41.5 -29 1 8 17200 17 07 00 17 15 00 --- 02 03 02 40.8 239.3 2.7 42.6 451 R 1 14000 17 15 00 2320+052 02 03 02 40.5 238.3 2.7 42.0 -29 1 8 14000 17 15 00 17 18 00 --- 02 06 02 40.0 239.1 2.8 42.4 151 R 1 12800 17 18 00 IC1481 02 06 02 40.3 240.0 2.8 43.0 -29 1 8 12800 17 18 00 17 26 00 --- 02 14 03 38.9 241.9 2.9 44.0 451 R 1 9600 Schedule for GBT_VLBA (Code Gb ) Page 6 Water Megamaser in the LINER IC1481, Nakai etc 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) ---------------------------------------------------------------------------------------- --- Sat 23 Apr 2005 Day 113 --- 17 26 00 2320+052 02 14 03 38.7 241.0 2.9 43.5 -29 1 8 9600 17 26 00 17 29 00 --- 02 17 04 38.2 241.6 2.9 43.8 151 R 1 8400 17 29 00 IC1481 02 17 04 38.4 242.6 3.0 44.3 -28 1 8 8400 17 29 00 17 37 00 --- 02 25 05 37.0 244.3 3.1 45.2 452 R 1 5200 17 37 00 2320+052 02 25 05 36.8 243.5 3.1 44.7 -28 1 8 5200 17 37 00 17 40 00 --- 02 28 06 36.2 244.1 3.1 45.0 152 R 1 4000 17 40 00 IC1481 02 28 06 36.5 245.0 3.1 45.5 -28 1 8 4000 17 40 00 17 48 00 --- 02 36 07 35.0 246.7 3.3 46.3 452 R 1 800 17 48 00 2320+052 02 36 07 34.8 245.8 3.3 45.9 -28 1 9 800 17 48 00 17 51 00 --- 02 39 08 34.3 246.5 3.3 46.2 152 F 1 400 17 51 00 IC1481 02 39 08 34.5 247.3 3.3 46.6 -28 1 9 400 17 51 00 17 59 00 --- 02 47 09 33.0 249.0 3.5 47.3 452 F 1 3600 17 59 00 2320+052 02 47 09 32.8 248.1 3.4 46.9 -28 1 9 3600 17 59 00 18 02 00 --- 02 50 09 32.3 248.7 3.5 47.1 152 F 1 4800 18 02 00 IC1481 02 50 09 32.5 249.6 3.5 47.6 -28 1 9 4800 18 02 00 18 10 00 --- 02 58 11 31.0 251.1 3.6 48.2 452 F 1 8000 18 10 00 2320+052 02 58 11 30.8 250.3 3.6 47.8 -28 1 9 8000 18 10 00 18 13 00 --- 03 01 11 30.3 250.9 3.7 48.0 152 F 1 9200 18 13 00 IC1481 03 01 11 30.5 251.7 3.7 48.4 -28 1 9 9200 18 13 00 18 21 00 --- 03 09 12 29.0 253.2 3.8 48.9 452 F 1 12400 18 36 00 3C454.3 03 24 15 27.4 269.3 4.5 54.6 841 1 9 12400 18 36 00 18 47 00 --- 03 35 17 25.3 271.1 4.7 54.6 660 F 1 16800 18 48 00 2334+076 03 36 17 27.7 257.0 4.0 50.3 5 1 10 16800 18 48 00 18 51 00 --- 03 39 17 27.2 257.5 4.1 50.5 180 R 1 17200 18 51 00 IC1481 03 39 17 23.2 258.6 4.3 50.5 -39 1 10 17200 18 51 00 18 59 00 --- 03 47 19 21.7 260.0 4.5 50.9 441 R 1 14000 18 59 00 2320+052 03 47 19 21.5 259.2 4.4 50.6 -28 1 10 14000 18 59 00 19 02 00 --- 03 50 19 21.0 259.7 4.5 50.7 152 R 1 12800 Schedule for GBT_VLBA (Code Gb ) Page 7 Water Megamaser in the LINER IC1481, Nakai etc 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) ---------------------------------------------------------------------------------------- --- Sat 23 Apr 2005 Day 113 --- 19 02 00 IC1481 03 50 19 21.1 260.5 4.5 51.0 -28 1 10 12800 19 02 00 19 10 00 --- 03 58 20 19.6 261.8 4.6 51.2 452 R 1 9600 19 10 00 2320+052 03 58 20 19.4 261.1 4.6 51.0 -28 1 10 9600 19 10 00 19 13 00 --- 04 01 21 18.8 261.6 4.7 51.1 152 R 1 8400 19 13 00 IC1481 04 01 21 19.0 262.3 4.7 51.3 -28 1 10 8400 19 13 00 19 21 00 --- 04 09 22 17.4 263.6 4.8 51.5 452 R 1 5200 19 21 00 2320+052 04 09 22 17.3 262.9 4.8 51.3 -28 1 10 5200 19 21 00 19 24 00 --- 04 12 23 16.7 263.4 4.9 51.4 152 R 1 4000 19 24 00 IC1481 04 12 23 16.8 264.1 4.9 51.6 -28 1 10 4000 19 24 00 19 32 00 --- 04 20 24 15.3 265.4 5.0 51.7 452 R 1 800 19 32 00 2320+052 04 20 24 15.1 264.7 5.0 51.6 -28 1 11 800 19 32 00 19 35 00 --- 04 23 25 14.5 265.1 5.0 51.6 152 F 1 400 19 35 00 IC1481 04 23 25 14.7 265.9 5.1 51.8 -28 1 11 400 19 35 00 19 43 00 --- 04 31 26 13.1 267.2 5.2 51.9 452 F 1 3600 19 43 00 2320+052 04 31 26 13.0 266.4 5.2 51.7 -28 1 11 3600 19 43 00 19 46 00 --- 04 34 26 12.4 266.9 5.2 51.8 152 F 1 4800 19 46 00 IC1481 04 34 26 12.5 267.6 5.2 51.9 -28 1 11 4800 19 46 00 19 54 00 --- 04 42 28 11.0 268.9 5.4 51.9 452 F 1 8000 19 54 00 3C454.3 04 42 28 12.2 281.1 5.8 53.2 -52 1 11 8000 19 54 00 20 05 00 --- 04 53 30 10.1 282.7 6.0 52.7 608 F 1 12400 20 06 00 2334+076 04 54 30 12.5 269.8 5.3 52.2 7 1 11 12400 20 06 00 20 09 00 --- 04 57 30 12.0 270.3 5.4 52.2 180 F 1 13600 20 09 00 IC1481 04 57 30 8.0 271.2 5.6 51.9 -39 1 11 13600 20 09 00 20 17 00 --- 05 05 31 6.4 272.5 5.8 51.9 441 F 1 16800 20 17 00 2320+052 05 05 31 6.3 271.7 5.7 51.8 -28 1 12 16800 20 17 00 20 20 00 --- 05 08 32 5.7 272.2 5.8 51.8 152 R 1 17200 20 20 00 IC1481 05 08 32 5.9 272.9 5.8 51.9 -28 1 12 17200 20 20 00 20 29 00 --- 05 17 33 4.1 274.3 6.0 D 51.7 0 R 1 13600 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: bn032.set --- WARNING --- This group does not match an entry in the frequency catalog. This might be ok because the catalog is not complete. But be very careful to be sure that the setup is correct. Setup group: 12 Station: GBT_VLBA 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= 21050.00 21050.00 21050.00 21050.00 Net SB= U U U U Pol. = LCP LCP LCP LCP BBC = 1 2 3 4 BBC SB= U U U U IF = C C C C The following frequency sets based on this setup were used. Frequency Set: 12 Based on FREQ, BW, and/or DOPPLER in schedule. Used pcal sets: 1 LO sum= 21779.62 21791.48 21799.64 21807.06 BBC fr= 729.62 741.48 749.64 757.06 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 = 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, 18, 3, 19 barrel=roll_auto SOURCE LIST -- Water Megamaser in the LINER IC1481, Nakai etc 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) * 3C454.3 22 51 29.519701 * 22 53 57.747900 22 54 12.037528 0.00 15 52 54.34817 * 16 08 53.56100 16 10 19.44643 0.00 From catalog imbedded in main SCHED input file. Doppler based on other sources. 1.083 scan hours, 66.194 baseline hours above horizon. * 3C286 13 28 49.657607 * 13 31 08.287900 13 31 24.336088 0.00 30 45 58.64036 * 30 30 32.95900 30 28 50.43187 0.00 From catalog imbedded in main SCHED input file. Doppler based on other sources. 0.167 scan hours, 8.463 baseline hours above horizon. * 2320+052 23 18 12.130378 * 23 20 44.856600 23 20 59.632824 0.00 04 57 23.44689 * 05 13 49.95300 05 15 22.26683 0.00 From catalog imbedded in main SCHED input file. Doppler based on other sources. 1.783 scan hours, 104.898 baseline hours above horizon. * 2334+076 23 31 40.087500 * 23 34 12.828200 23 34 27.528094 0.00 07 19 52.41074 * 07 36 27.55200 07 38 00.81750 0.00 From catalog imbedded in main SCHED input file. Doppler based on other sources. 0.433 scan hours, 24.704 baseline hours above horizon. * IC1481 23 16 52.531672 * 23 19 25.079700 23 19 39.835314 0.00 05 37 56.34069 * 05 54 21.80500 05 55 53.80720 0.00 From catalog imbedded in main SCHED input file. Doppler based on LSR frame and radio definition. Velocities: 6110.00 5950.00 5840.00 5740.00 5.967 scan hours, 358.215 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) 3C454.3 46.3 3C286 136.0 2320+052 41.2 2334+076 37.5 IC1481 41.4 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