COVER INFORMATION Station: VLBA_HN (Code Hn ) Experiment: bw070 M84 Black hole. Ly, Walker, Wrobel. Exp. Code: bw070 Schedule Version: 1.00 Processed by SCHED version: Release of 18 Sept. 2003 PI: R.C. Walker Address: NRAO, P.O. Box O Socorro, NM 87801 USA Phone: +1-505-835-7247 (w) / +1-505-835-3972 (h) EMAIL: cwalker@nrao.edu Fax: +1-505-835-7027 Phone during observation: +1-505-835-7247 (w) / +1-505-835-3972 (h) Observing mode: VLBA Notes: 1156+295 and 3C273 non-recording scans are for GB and EB pointing. 1156+295 recording scans are not for pointing. VLBA will observe other sources during GB and/or EB pointing scans. Schedule for VLBA_HN (Code Hn ) Page 2 bw070 M84 Black hole. Ly, Walker, Wrobel. 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) ---------------------------------------------------------------------------------------- --- Sun 4 Apr 2004 Day 95 --- Next scan frequencies: 43119.49 43119.49 43135.49 43135.49 Next BBC frequencies: 719.49 719.49 735.49 735.49 Next scan bandwidths: 16.00 16.00 16.00 16.00 23 00 00 0420-014 07 06 26 32.6 230.8 2.7 34.6 0 1 1 0 23 00 00 23 05 00 --- 07 11 27 31.9 232.0 2.8 35.2 300 F 1 4000 23 07 00 M84 07 13 27 17.5 88.5 -5.2 -48.7 18 1 1 4000 23 07 00 23 09 00 --- 07 15 27 17.9 88.9 -5.2 -48.7 120 F 1 5600 23 10 13 1156+295 07 16 41 32.9 78.9 -4.7 -55.4 37 1 1 5600 23 10 13 23 15 13 --- 07 21 42 33.8 79.6 -4.6 -55.6 300 F 1 9600 23 16 36 M84 07 23 05 19.3 90.2 -5.0 -48.7 48 1 1 9600 23 16 36 23 22 36 --- 07 29 06 20.4 91.2 -4.9 -48.7 360 F 1 14400 23 22 49 M84 07 29 18 20.4 91.2 -4.9 -48.7 8 1 2 14400 23 22 49 23 33 49 --- 07 40 20 22.4 93.1 -4.7 -48.6 660 R 1 12000 23 34 18 3C274 07 40 50 21.1 92.6 -4.8 -48.5 21 1 2 12000 23 34 18 23 36 18 --- 07 42 50 21.5 93.0 -4.8 -48.5 120 R 1 10400 23 36 50 M84 07 43 22 23.0 93.7 -4.7 -48.5 23 1 2 10400 23 36 50 23 45 50 --- 07 52 23 24.6 95.3 -4.5 -48.4 540 R 1 3200 23 46 03 M84 07 52 36 24.6 95.3 -4.5 -48.4 8 1 2 3200 23 46 03 23 48 03 --- 07 54 36 25.0 95.7 -4.5 -48.4 120 R 1 1600 23 48 15 M84 07 54 49 25.0 95.7 -4.5 -48.4 8 1 3 1600 23 48 15 23 57 15 --- 08 03 50 26.7 97.3 -4.4 -48.1 540 F 1 5600 --- Start: Sun 4 Apr 2004 Day 95 -- Stop: Mon 5 Apr 2004 Day 96 --- 23 57 57 M84 08 04 33 26.8 97.4 -4.3 -48.1 37 1 3 5600 23 57 57 00 08 57 --- 08 15 34 28.8 99.5 -4.2 -47.8 660 F 1 14400 00 09 27 3C274 08 16 04 27.5 98.9 -4.2 -47.8 21 1 3 14400 00 09 27 00 11 27 --- 08 18 04 27.9 99.3 -4.2 -47.7 120 F 1 16000 00 11 58 M84 08 18 36 29.4 100.1 -4.1 -47.7 22 1 4 16000 00 11 58 00 20 58 --- 08 27 37 31.0 101.8 -4.0 -47.3 540 R 1 12000 Schedule for VLBA_HN (Code Hn ) Page 3 bw070 M84 Black hole. Ly, Walker, Wrobel. 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 5 Apr 2004 Day 96 --- 00 21 11 M84 08 27 50 31.0 101.8 -4.0 -47.3 8 1 4 12000 00 21 11 00 32 11 --- 08 38 52 33.0 104.0 -3.8 -46.8 660 R 1 3200 00 32 20 3C274 08 39 01 31.7 103.3 -3.9 -46.8 0 1 4 3200 00 32 11 00 34 20 --- 08 41 01 32.0 103.7 -3.8 -46.7 120 R 1 1481 00 36 20 M84 08 43 01 33.7 104.8 -3.7 -46.6 111 1 5 1481 00 36 20 00 43 20 --- 08 50 02 35.0 106.2 -3.6 -46.1 420 F 1 4119 00 43 24 M84 08 50 07 35.0 106.2 -3.6 -46.1 0 1 5 4119 00 43 20 00 54 24 --- 09 01 09 36.9 108.6 -3.4 -45.4 660 F 1 12979 00 54 53 3C274 09 01 38 35.6 107.9 -3.5 -45.5 20 1 5 12979 00 54 53 00 56 53 --- 09 03 38 36.0 108.3 -3.5 -45.4 120 F 1 14579 00 57 23 M84 09 04 08 37.4 109.2 -3.4 -45.2 22 1 6 14579 00 57 23 01 06 23 --- 09 13 10 39.0 111.2 -3.2 -44.4 540 R 1 13421 01 06 36 M84 09 13 22 39.0 111.2 -3.2 -44.4 7 1 6 13421 01 06 36 01 17 36 --- 09 24 24 40.9 113.8 -3.0 -43.4 660 R 1 4621 01 18 04 3C274 09 24 52 39.6 113.0 -3.1 -43.6 20 1 6 4621 01 18 04 01 20 04 --- 09 26 53 40.0 113.5 -3.1 -43.4 120 R 1 3021 01 20 34 M84 09 27 23 41.4 114.5 -3.0 -43.1 21 1 7 3021 01 20 34 01 29 34 --- 09 36 24 42.9 116.7 -2.8 -42.2 540 F 1 4179 01 29 46 M84 09 36 36 42.9 116.7 -2.8 -42.1 7 1 7 4179 01 29 46 01 40 46 --- 09 47 38 44.7 119.5 -2.6 -40.8 660 F 1 12979 01 40 58 M84 09 47 50 44.7 119.5 -2.6 -40.8 7 1 8 12979 01 40 58 01 51 58 --- 09 58 52 46.4 122.5 -2.4 -39.3 660 R 1 13421 01 52 25 3C274 09 59 19 45.2 121.5 -2.5 -39.7 19 1 8 13421 01 52 25 01 54 25 --- 10 01 20 45.5 122.0 -2.5 -39.4 120 R 1 11821 01 54 54 M84 10 01 49 46.9 123.3 -2.4 -38.9 20 1 8 11821 01 54 54 02 03 54 --- 10 10 50 48.3 125.9 -2.2 -37.5 540 R 1 4621 02 04 06 M84 10 11 02 48.3 125.9 -2.2 -37.5 7 1 9 4621 02 04 06 02 15 06 --- 10 22 04 49.9 129.2 -2.1 -35.6 660 F 1 4179 Schedule for VLBA_HN (Code Hn ) Page 4 bw070 M84 Black hole. Ly, Walker, Wrobel. 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 5 Apr 2004 Day 96 --- 02 15 15 3C274 10 22 13 48.7 128.0 -2.1 -36.2 0 1 9 4179 02 15 06 02 17 15 --- 10 24 13 49.0 128.6 -2.1 -35.9 120 F 1 5897 02 19 15 M84 10 26 14 50.5 130.5 -2.0 -34.8 111 1 9 5897 02 19 15 02 26 15 --- 10 33 15 51.4 132.8 -1.9 -33.5 420 F 1 11497 02 26 20 M84 10 33 19 51.4 132.8 -1.9 -33.5 0 1 10 11497 02 26 15 02 37 20 --- 10 44 21 52.9 136.5 -1.7 -31.1 660 R 1 14843 02 37 46 3C274 10 44 48 51.8 135.1 -1.8 -31.9 19 1 10 14843 02 37 46 02 39 46 --- 10 46 48 52.0 135.8 -1.7 -31.5 120 R 1 13243 02 40 14 M84 10 47 16 53.2 137.5 -1.6 -30.5 19 1 10 13243 02 40 14 02 49 14 --- 10 56 18 54.3 140.7 -1.5 -28.4 540 R 1 6043 02 49 26 M84 10 56 30 54.3 140.8 -1.5 -28.3 7 1 11 6043 02 49 26 03 00 26 --- 11 07 31 55.6 145.0 -1.3 -25.5 660 F 1 2757 03 00 52 3C274 11 07 58 54.5 143.3 -1.4 -26.6 18 1 11 2757 03 00 52 03 02 52 --- 11 09 58 54.8 144.1 -1.4 -26.1 120 F 1 4357 03 03 20 M84 11 10 26 55.9 146.1 -1.2 -24.7 19 1 11 4357 03 03 20 03 12 20 --- 11 19 27 56.7 149.8 -1.1 -22.2 540 F 1 11557 03 12 31 M84 11 19 39 56.8 149.8 -1.1 -22.2 7 1 12 11557 03 12 31 03 23 31 --- 11 30 41 57.7 154.5 -0.9 -18.9 660 R 1 14843 03 23 58 3C274 11 31 07 56.8 152.5 -1.0 -20.2 18 1 12 14843 03 23 58 03 25 58 --- 11 33 07 57.0 153.4 -1.0 -19.6 120 R 1 13243 03 26 25 M84 11 33 34 57.9 155.7 -0.9 -18.0 19 1 12 13243 03 26 25 03 35 25 --- 11 42 36 58.5 159.8 -0.7 -15.1 540 R 1 6043 03 35 36 M84 11 42 47 58.6 159.8 -0.7 -15.0 7 1 13 6043 03 35 36 03 46 36 --- 11 53 49 59.2 164.9 -0.5 -11.3 660 F 1 2757 03 48 36 M84 11 55 49 59.3 165.8 -0.5 -10.6 114 1 13 2757 03 48 36 03 53 36 --- 12 00 50 59.5 168.2 -0.4 -8.8 300 F 1 6757 03 53 52 3C274 12 01 07 58.8 165.8 -0.5 -10.6 9 1 13 6757 03 53 52 03 55 52 --- 12 03 07 58.8 166.7 -0.5 -9.9 120 F 1 8357 Schedule for VLBA_HN (Code Hn ) Page 5 bw070 M84 Black hole. Ly, Walker, Wrobel. 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 5 Apr 2004 Day 96 --- 03 57 33 1156+295 12 04 48 76.3 184.6 0.1 3.9 60 1 13 8357 03 57 33 04 00 33 --- 12 07 49 76.2 187.4 0.1 6.2 180 F 1 10757 04 01 53 M84 12 09 09 59.7 172.2 -0.3 -5.9 41 1 13 10757 04 01 53 04 09 53 --- 12 17 10 59.9 176.1 -0.1 -3.0 480 F 1 17157 04 10 05 M84 12 17 22 59.9 176.1 -0.1 -2.9 7 1 14 17157 04 10 05 04 21 05 --- 12 28 23 59.9 181.5 0.1 1.1 660 R 1 8357 04 21 30 3C274 12 28 49 59.4 178.9 0.0 -0.8 18 1 14 8357 04 21 30 04 23 30 --- 12 30 49 59.4 179.9 0.0 -0.1 120 R 1 6757 ----------- Tape Change ------------ 04 23 57 M84 12 31 16 59.9 182.9 0.1 2.2 18 2 1 6757 04 23 57 04 32 57 --- 12 40 17 59.8 187.3 0.3 5.5 540 F 1 443 04 33 08 M84 12 40 29 59.7 187.4 0.3 5.5 7 2 1 443 04 33 08 04 44 08 --- 12 51 31 59.4 192.6 0.4 9.5 660 F 1 9243 04 44 13 M84 12 51 35 59.4 192.7 0.4 9.5 0 2 1 9243 04 44 08 04 49 43 --- 12 57 06 59.2 195.3 0.5 11.4 330 F 1 13703 04 49 52 3C274 12 57 15 58.9 192.5 0.4 9.3 1 2 1 13703 04 49 43 04 51 52 --- 12 59 15 58.8 193.4 0.5 10.0 120 F 1 15421 04 56 27 J1635+3808 13 03 52 50.2 78.4 -3.5 -65.7 193 2 2 15421 04 56 27 05 00 27 =1633+38 13 07 52 50.9 78.9 -3.5 -66.0 240 R 1 16579 05 02 27 M84 13 09 53 58.4 201.1 0.7 15.7 33 2 2 16579 05 02 27 05 09 27 --- 13 16 54 57.9 204.2 0.9 17.9 420 R 1 10979 05 12 40 M84 13 20 07 57.7 205.6 0.9 18.9 186 2 3 10979 05 12 40 05 27 40 --- 13 35 09 56.4 211.9 1.2 23.4 900 F 1 1022 05 28 01 3C274 13 35 30 56.4 209.3 1.1 21.5 13 2 3 1022 05 28 01 05 30 01 --- 13 37 30 56.2 210.2 1.1 22.1 120 F 1 2622 05 30 22 M84 13 37 52 56.1 213.0 1.2 24.1 14 2 3 2622 05 30 22 05 45 22 --- 13 52 55 54.5 218.8 1.5 28.0 900 F 1 14622 05 47 22 M84 13 54 55 54.2 219.5 1.5 28.5 114 2 4 14622 05 47 22 05 54 22 --- 14 01 56 53.4 222.0 1.6 30.2 420 R 1 14979 Schedule for VLBA_HN (Code Hn ) Page 6 bw070 M84 Black hole. Ly, Walker, Wrobel. 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 5 Apr 2004 Day 96 --- 05 54 49 M84 14 02 23 53.4 222.2 1.6 30.3 22 2 4 14979 05 54 49 06 09 49 --- 14 17 25 51.4 227.3 1.9 33.5 900 R 1 2979 06 10 09 3C274 14 17 45 51.7 225.1 1.8 32.0 12 2 4 2979 06 10 09 06 12 09 --- 14 19 46 51.5 225.7 1.8 32.5 120 R 1 1379 06 12 29 M84 14 20 06 51.1 228.1 1.9 34.0 13 2 5 1379 06 12 29 06 27 29 --- 14 35 08 48.9 232.8 2.2 36.7 900 F 1 10622 06 29 29 M84 14 37 09 48.6 233.4 2.2 37.1 114 2 5 10622 06 29 29 06 36 29 --- 14 44 10 47.6 235.4 2.3 38.2 420 F 1 16222 06 36 48 M84 14 44 29 47.5 235.5 2.3 38.2 14 2 6 16222 06 36 48 06 51 48 --- 14 59 31 45.2 239.6 2.6 40.4 900 R 1 6979 06 52 06 3C274 14 59 50 45.7 237.7 2.5 39.3 11 2 6 6979 06 52 06 06 54 06 --- 15 01 50 45.4 238.2 2.5 39.6 120 R 1 5379 06 54 25 M84 15 02 09 44.8 240.3 2.6 40.7 11 2 7 5379 06 54 25 07 09 25 --- 15 17 11 42.4 244.1 2.9 42.5 900 F 1 6622 07 11 25 M84 15 19 12 42.0 244.6 2.9 42.7 114 2 7 6622 07 11 25 07 18 25 --- 15 26 13 40.9 246.2 3.0 43.4 420 F 1 12222 07 18 38 M84 15 26 26 40.8 246.3 3.0 43.4 8 2 8 12222 07 18 38 07 33 38 --- 15 41 28 38.3 249.7 3.3 44.8 900 R 1 10979 07 33 55 3C274 15 41 45 38.9 248.0 3.2 44.0 10 2 8 10979 07 33 55 07 35 55 --- 15 43 46 38.5 248.5 3.2 44.2 120 R 1 9379 07 36 12 M84 15 44 03 37.8 250.3 3.3 45.0 10 2 9 9379 07 36 12 07 51 12 --- 15 59 06 35.2 253.5 3.6 46.0 900 F 1 2622 07 53 12 M84 16 01 06 34.9 253.9 3.6 46.2 114 2 9 2622 07 53 12 08 02 12 --- 16 10 07 33.3 255.7 3.7 46.7 540 F 1 9822 08 04 12 J1635+3808 16 12 08 83.5 135.5 -0.4 -40.7 14 2 9 9822 08 04 12 08 08 12 =1633+38 16 16 08 84.0 141.1 -0.3 -35.7 240 F 1 13022 08 10 14 M84 16 18 10 31.8 257.3 3.9 47.1 11 2 10 13022 08 10 14 08 19 14 --- 16 27 12 30.2 259.0 4.0 47.5 540 R 1 14979 Schedule for VLBA_HN (Code Hn ) Page 7 bw070 M84 Black hole. Ly, Walker, Wrobel. 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 5 Apr 2004 Day 96 --- 08 21 24 M84 16 29 22 29.8 259.5 4.1 47.6 124 2 10 14979 08 21 24 08 36 24 --- 16 44 25 27.1 262.3 4.3 48.1 900 R 1 2979 08 36 40 3C274 16 44 41 27.8 260.8 4.2 47.7 9 2 10 2979 08 36 40 08 38 40 --- 16 46 41 27.4 261.2 4.3 47.8 120 R 1 1379 08 38 56 M84 16 46 57 26.7 262.7 4.4 48.2 9 2 11 1379 08 38 56 08 53 56 --- 17 02 00 23.9 265.4 4.6 48.5 900 F 1 10622 08 54 01 M84 17 02 04 23.9 265.4 4.6 48.5 0 2 12 10622 08 53 56 09 03 01 --- 17 11 06 22.3 267.0 4.8 48.6 540 R 1 17318 09 03 05 M84 17 11 10 22.2 267.0 4.8 48.6 0 2 12 17318 09 03 01 09 18 05 --- 17 26 13 19.5 269.6 5.0 48.7 900 R 1 5259 09 18 21 3C274 17 26 28 20.2 268.3 4.9 48.5 8 2 12 5259 09 18 21 09 20 21 --- 17 28 28 19.8 268.6 5.0 48.5 120 R 1 3659 09 20 36 M84 17 28 44 19.0 270.0 5.1 48.7 8 2 13 3659 09 20 36 09 35 36 --- 17 43 47 16.3 272.6 5.3 48.6 900 F 1 8341 09 35 41 M84 17 43 51 16.3 272.6 5.3 48.6 0 2 13 8341 09 35 36 09 44 41 --- 17 52 53 14.6 274.1 5.5 48.5 540 F 1 15604 10 00 01 3C274 18 08 15 12.5 275.3 5.6 48.3 910 2 13 15604 10 00 01 10 02 01 --- 18 10 16 12.2 275.7 5.7 48.2 120 F 1 17204 10 30 22 J1635+3808 18 38 41 66.2 268.8 2.1 68.5 1587 2 14 17204 10 30 22 10 34 22 =1633+38 18 42 42 65.5 269.5 2.1 68.5 240 R 1 14004 11 25 57 J1635+3808 19 34 26 56.1 277.3 3.0 67.4 3071 2 14 14004 11 25 57 11 28 57 =1633+38 19 37 26 55.5 277.8 3.0 67.2 180 R 1 11604 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: bw070.set Matches group v7mm_c8 in /mnt/mach/mach/cwalker/code/sched/catalogs/freq.dat Setup group: 1 Station: VLBA Total bit rate: 256 Format: VLBA1:4 Bits per sample: 2 Sample rate: 32.000 Number of channels: 4 Passes/head pos: 1 Speedup factor: 1.00 Tape speeds: Low density - 266.660 ips, High density - 160.00 ips Time per pass for 17600 ft, High density tapes is: 00:22:00 1st LO= 42400.00 42400.00 42400.00 42400.00 Net SB= U U U U Pol. = RCP LCP RCP LCP BBC = 1 2 3 4 BBC SB= U U U U IF = A C A C VLBA FE= 7mm omit 7mm omit VLBA Synth= 15.4 7.6 11.6 The following frequency sets based on this setup were used. Frequency Set: 1 Setup file default. Used pcal sets: 1 LO sum= 43119.49 43119.49 43135.49 43135.49 BBC fr= 719.49 719.49 735.49 735.49 Bandwd= 16.000 16.000 16.000 16.000 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 13510 13510 0 0 0 0 PCALFR2= 510 510 13510 13510 0 0 0 0 Track assignments are: track1= 2, 18, 3, 19 barrel=roll_auto SOURCE LIST -- bw070 M84 Black hole. Ly, Walker, Wrobel. 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) * M84 12 22 31.581984 * 12 25 03.743336 12 25 17.348976 13 09 48.76873 * 12 53 12.13934 12 51 44.28662 From catalog imbedded in main SCHED input file. Ly, Walker, and Wrobel AJ 2004 J0423-0120 04 20 43.539850 * 04 23 15.800727 04 23 27.237277 * 0420-014 -01 27 28.70002 *-01 20 33.06531 -01 20 01.60161 J0423-01 /mnt/mach/mach/cwalker/code/sched/catalogs/sources.vlba ICRF - Ext.1 Source - 1998 IERS Annual Report J1159+2914 11 56 57.786211 * 11 59 31.833912 11 59 45.855866 * 1156+295 29 31 25.73884 * 29 14 43.82694 29 13 18.94154 J1159+29 /mnt/mach/mach/cwalker/code/sched/catalogs/sources.vlba ICRF - Ext.1 Source - 1998 IERS Annual Report J1229+0203 12 26 33.245833 * 12 29 06.699729 12 29 20.293675 1226+023 02 19 43.30569 * 02 03 08.59819 02 01 39.99702 * 3C273 /mnt/mach/mach/cwalker/code/sched/catalogs/sources.vlba 3C273B ICRF - Ext.1 Source - 1998 IERS Annual Report J1229+02 J1230+1223 12 28 17.569280 * 12 30 49.423382 12 31 03.002679 1228+126 12 40 01.74911 * 12 23 28.04393 12 22 00.11301 * 3C274 /mnt/mach/mach/cwalker/code/sched/catalogs/sources.vlba J1230+12 ICRF - Ext.1 Source - 1998 IERS Annual Report * J1635+3808 16 33 30.625098 * 16 35 15.492973 16 35 25.018744 1633+38 38 14 10.08283 * 38 08 04.50060 38 07 13.03495 1633+382 /mnt/mach/mach/cwalker/code/sched/catalogs/sources.vlba J1635+38 ICRF - Ext.1 Source - 1998 IERS Annual Report 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) M84 159.3 0420-014 51.8 1156+295 141.9 3C273 169.1 3C274 160.2 J1635+3808 112.9 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