COVER INFORMATION Station: VLBA_PT (Code Pt ) Experiment: bw082 M87 movie pilot. Walker, Ly, Junor, Hardee Exp. Code: bw082e Schedule Version: 1.00 Processed by SCHED version: 6.04 March 2006 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: COVER LETTER: Special note for this session: The third run of this sequence was seriously degraded so the program committee has allowed me to get a second 3-day sequence which I will do in conjunction with the 12-16 day observation. The first of that pair will be April 18. The second should be on April 21. Normal cover letter for this project: This 6 session project samples different possible frame rates for a 7mm movie of M87. It is needed prior to full movie observations because the rate of changes near the core is not known. It is likely that they have been severly undersampled by previous observations. Each session will use the same schedule. The sessions should fall in the following windows (days) after the first: 0, 3, 6, 12-16, 31-39, 80-100. The program committee has asked me to coordinate with Phillip Hicks on the scheduling. I will do so. I propose to use long range forcasts to identify a 6 day window in which to start, and then, at 12, 31, and 80 days, identify a day within the 5, 9, and 21 day windows that follow in which to do a session. Here is the key information from the time allocation email: ------------------ PROPOSAL STATUS ( 01/06/05 ): Approved for dynamic scheduling, high priority Proposal Selection Committee - December 3, 2004: We ask Phillip Hicks to seek permission from Craig Walker before starting the observing sequence, rather than having Phillip be responsible for making the long-term weather forecast. CURRENT TIME ALLOCATION: 6 times 10.0 hrs dynamically scheduled centered at LST 12.5 with 128 Mbits/sec recording --------------------- I apologize for the long delay in starting this project, but it will take my attention once started and, for personal reasons, I did not feel I was in a position to provide that over the last year. ------------------------------------------------------------------------- Schedule for VLBA_PT (Code Pt ) Page 2 bw082 M87 movie pilot. Walker, Ly, Junor, Hardee 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 ---------------------------------------------------------------------------------------- --- Fri 21 Apr 2006 Day 111 --- Next scan frequencies: 43127.49 43127.49 43135.49 43135.49 Next BBC frequencies: 727.49 727.49 735.49 735.49 Next scan bandwidths: 8.00 8.00 8.00 8.00 00 46 38 OJ287 07 30 00 66.4 121.5 -1.4 -48.6 0 1 1 0 00 46 08 00 54 37 --- 07 38 00 67.8 124.8 -1.3 -46.2 479 F 1 3391 00 46 21 00 56 41 3C274 07 40 04 21.1 89.2 -4.9 -57.7 25 1 1 3391 00 56 11 01 11 38 --- 07 55 04 24.2 91.3 -4.6 -57.7 898 F 1 9575 00 56 24 01 12 21 3C279 07 55 47 8.8 103.3 -5.0 -53.9 6 1 1 9575 01 11 38 01 14 21 --- 07 57 47 9.2 103.6 -5.0 -53.8 120 F 1 10659 01 11 38 01 15 05 3C274 07 58 31 24.9 91.8 -4.5 -57.7 6 1 1 10659 01 14 21 01 30 02 --- 08 13 31 28.0 94.0 -4.3 -57.5 898 F 1 16933 01 14 21 01 30 46 3C279 08 14 15 12.5 106.1 -4.7 -52.9 7 1 2 16933 01 30 02 01 32 45 --- 08 16 15 12.9 106.4 -4.7 -52.8 120 R 1 17179 01 30 02 01 33 29 3C274 08 16 59 28.7 94.5 -4.2 -57.5 6 1 2 17179 01 32 45 01 48 27 --- 08 31 59 31.8 96.8 -4.0 -57.1 898 R 1 10903 01 32 45 01 49 11 3C279 08 32 43 16.1 109.0 -4.4 -51.7 7 1 2 10903 01 48 27 01 51 10 --- 08 34 43 16.5 109.3 -4.4 -51.6 120 R 1 9812 01 48 27 01 51 55 3C274 08 35 27 32.5 97.3 -3.9 -57.0 6 1 2 9812 01 51 10 02 06 52 --- 08 50 27 35.5 99.7 -3.7 -56.5 898 R 1 3533 01 51 10 02 07 36 3C279 08 51 12 19.7 112.0 -4.1 -50.3 7 1 2 3533 02 06 52 02 09 36 --- 08 53 12 20.1 112.3 -4.1 -50.2 120 R 1 2441 02 06 52 02 10 21 3C274 08 53 56 36.3 100.3 -3.6 -56.3 6 1 3 2441 02 09 36 02 25 18 --- 09 08 56 39.3 102.9 -3.4 -55.5 898 F 1 3840 02 09 36 02 26 03 3C279 09 09 41 23.2 115.2 -3.8 -48.7 6 1 3 3840 02 25 18 02 28 02 --- 09 11 41 23.6 115.6 -3.7 -48.5 120 F 1 4934 02 25 18 02 28 47 3C274 09 12 25 40.0 103.5 -3.3 -55.3 6 1 3 4934 02 28 02 02 43 44 --- 09 27 25 43.0 106.4 -3.1 -54.2 898 F 1 11214 02 28 02 02 44 29 3C279 09 28 10 26.6 118.6 -3.5 -46.8 6 1 3 11214 02 43 44 02 46 28 --- 09 30 10 27.0 119.0 -3.4 -46.6 120 F 1 12308 02 43 44 Schedule for VLBA_PT (Code Pt ) Page 3 bw082 M87 movie pilot. Walker, Ly, Junor, Hardee 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 ---------------------------------------------------------------------------------------- --- Fri 21 Apr 2006 Day 111 --- 02 47 13 3C274 09 30 55 43.7 107.1 -3.0 -54.0 5 1 4 12308 02 46 28 03 02 11 --- 09 45 55 46.6 110.2 -2.8 -52.5 898 R 1 16611 02 46 28 03 02 54 3C279 09 46 39 29.9 122.3 -3.2 -44.6 4 1 4 16611 03 02 11 03 04 54 --- 09 48 39 30.2 122.7 -3.1 -44.3 120 R 1 15521 03 02 11 03 06 54 OJ287 09 50 39 71.2 224.4 0.9 38.0 32 1 4 15521 03 06 24 03 11 53 --- 09 55 39 70.5 227.1 1.0 40.1 299 R 1 13327 03 06 37 03 13 43 J1159+2914 09 57 29 63.6 92.6 -2.0 -71.0 15 1 4 13327 03 13 13 03 18 42 =1156+295 10 02 29 64.6 93.4 -2.0 -70.9 299 R 1 11132 03 13 26 03 19 44 3C274 10 03 31 50.0 114.2 -2.5 -50.5 26 1 4 11132 03 19 14 03 34 41 --- 10 18 31 52.8 118.0 -2.2 -48.3 898 R 1 4948 03 19 27 03 35 26 3C279 10 19 15 35.4 129.4 -2.6 -39.9 3 1 4 4948 03 34 41 03 37 25 --- 10 21 15 35.7 129.9 -2.6 -39.6 120 R 1 3855 03 34 41 03 38 10 3C274 10 22 00 53.4 118.9 -2.2 -47.7 3 1 5 3855 03 37 25 03 53 08 --- 10 37 00 56.0 123.3 -1.9 -45.0 898 F 1 2426 03 37 25 03 53 52 3C279 10 37 44 38.2 133.9 -2.3 -36.8 3 1 5 2426 03 53 08 03 55 52 --- 10 39 44 38.5 134.4 -2.3 -36.4 120 F 1 3519 03 53 08 03 56 36 3C274 10 40 29 56.6 124.4 -1.8 -44.2 2 1 5 3519 03 55 52 04 11 34 --- 10 55 29 59.1 129.5 -1.6 -40.7 898 F 1 9800 03 55 52 04 12 18 3C279 10 56 13 40.8 138.8 -2.0 -33.2 2 1 5 9800 04 11 34 04 14 17 --- 10 58 13 41.1 139.3 -2.0 -32.8 120 F 1 10892 04 11 34 04 15 02 3C274 10 58 58 59.7 130.8 -1.5 -39.8 1 1 5 10892 04 14 17 04 29 59 --- 11 13 58 61.9 136.7 -1.3 -35.4 898 F 1 17170 04 14 17 04 30 43 3C279 11 14 42 43.2 144.1 -1.7 -29.2 0 1 6 17170 04 29 59 04 32 43 --- 11 16 42 43.5 144.7 -1.7 -28.7 120 R 1 16080 04 29 59 04 33 27 3C274 11 17 26 62.4 138.2 -1.2 -34.3 0 1 6 16080 04 32 43 04 48 25 --- 11 32 26 64.3 145.2 -1.0 -28.9 898 R 1 9801 04 32 43 04 49 09 3C279 11 33 10 45.3 149.8 -1.4 -24.7 0 1 6 9801 04 48 25 04 51 09 --- 11 35 10 45.5 150.4 -1.4 -24.2 120 R 1 8708 04 48 25 Schedule for VLBA_PT (Code Pt ) Page 4 bw082 M87 movie pilot. Walker, Ly, Junor, Hardee 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 ---------------------------------------------------------------------------------------- --- Fri 21 Apr 2006 Day 111 --- 04 51 53 3C274 11 35 55 64.7 146.9 -0.9 -27.5 0 1 6 8708 04 51 09 05 06 51 --- 11 50 55 66.2 155.0 -0.7 -21.0 898 R 1 2427 04 51 09 05 07 35 3C279 11 51 40 47.0 155.9 -1.1 -19.8 0 1 6 2427 05 06 51 05 09 35 --- 11 53 40 47.2 156.6 -1.0 -19.2 120 R 1 1334 05 06 51 05 10 19 3C274 11 54 24 66.5 157.0 -0.6 -19.3 0 1 7 1334 05 09 35 05 25 17 --- 12 09 24 67.5 166.0 -0.4 -11.8 898 F 1 4947 05 09 35 05 26 01 3C279 12 10 09 48.4 162.5 -0.8 -14.5 0 1 7 4947 05 25 17 05 28 01 --- 12 12 09 48.5 163.2 -0.7 -13.9 120 F 1 6041 05 25 17 05 30 01 J1159+2914 12 14 09 84.1 211.7 0.2 29.9 43 1 7 6041 05 29 31 05 35 00 =1156+295 12 19 09 83.5 220.1 0.3 37.6 299 F 1 8235 05 29 44 05 37 01 J1310+3220 12 21 10 79.4 97.4 -0.8 -75.8 33 1 7 8235 05 36 31 05 42 00 =1308+326 12 26 10 80.5 98.9 -0.7 -74.9 299 F 1 10430 05 36 44 05 44 47 3C274 12 28 58 68.0 178.6 0.0 -1.2 108 1 7 10430 05 44 17 05 59 44 --- 12 43 58 67.9 188.3 0.2 7.0 898 F 1 16613 05 44 30 06 00 29 3C279 12 44 42 49.8 175.4 -0.2 -3.8 2 1 8 16613 05 59 44 06 02 28 --- 12 46 42 49.8 176.2 -0.2 -3.1 120 R 1 17494 05 59 44 06 03 13 3C274 12 47 26 67.7 190.5 0.3 8.9 2 1 8 17494 06 02 28 06 18 10 --- 13 02 26 66.9 199.8 0.5 16.7 898 R 1 11215 06 02 28 06 18 54 3C279 13 03 10 49.8 182.6 0.1 2.1 3 1 8 11215 06 18 10 06 20 53 --- 13 05 10 49.8 183.3 0.1 2.8 120 R 1 10126 06 18 10 06 21 37 3C274 13 05 54 66.7 201.9 0.6 18.4 4 1 8 10126 06 20 53 06 36 35 --- 13 20 54 65.3 210.2 0.8 25.2 898 R 1 3852 06 20 53 06 37 17 3C279 13 21 37 49.4 189.6 0.4 8.0 5 1 8 3852 06 36 35 06 39 17 --- 13 23 37 49.4 190.4 0.5 8.6 120 R 1 2769 06 36 35 06 40 00 3C274 13 24 19 64.9 212.0 0.9 26.6 5 1 9 2769 06 39 17 06 54 57 --- 13 39 19 63.1 219.3 1.1 32.4 898 F 1 3499 06 39 17 06 55 39 3C279 13 40 01 48.6 196.5 0.7 13.6 7 1 9 3499 06 54 57 06 57 39 --- 13 42 01 48.5 197.2 0.8 14.2 120 F 1 4575 06 54 57 Schedule for VLBA_PT (Code Pt ) Page 5 bw082 M87 movie pilot. Walker, Ly, Junor, Hardee 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 ---------------------------------------------------------------------------------------- --- Fri 21 Apr 2006 Day 111 --- 06 58 20 3C274 13 42 43 62.7 220.8 1.2 33.6 7 1 9 4575 06 57 39 07 13 18 --- 13 57 43 60.5 227.1 1.4 38.3 898 F 1 10836 06 57 39 07 13 58 3C279 13 58 24 47.3 203.0 1.0 19.0 8 1 9 10836 07 13 18 07 15 58 --- 14 00 24 47.1 203.7 1.1 19.5 120 F 1 11905 07 13 18 07 16 38 3C274 14 01 04 60.0 228.4 1.5 39.2 9 1 10 11905 07 15 58 07 31 36 --- 14 16 04 57.6 233.7 1.7 43.0 898 R 1 17042 07 15 58 07 32 15 3C279 14 16 44 45.6 209.2 1.3 23.9 9 1 10 17042 07 31 36 07 34 15 --- 14 18 44 45.4 209.8 1.4 24.4 120 R 1 15983 07 31 36 07 34 54 3C274 14 19 23 57.1 234.8 1.8 43.7 10 1 10 15983 07 34 15 07 49 51 --- 14 34 23 54.5 239.4 2.1 46.7 898 R 1 9739 07 34 15 07 50 30 3C279 14 35 02 43.6 214.9 1.6 28.4 11 1 10 9739 07 49 51 07 52 30 --- 14 37 02 43.4 215.5 1.7 28.9 120 R 1 8682 07 49 51 07 54 30 J1159+2914 14 39 02 56.0 272.6 2.7 71.0 76 1 10 8682 07 54 00 07 59 29 =1156+295 14 44 02 55.0 273.2 2.7 70.9 299 R 1 6487 07 54 13 08 00 06 J1310+3220 14 44 39 70.3 270.8 1.6 77.8 0 1 10 6487 07 59 29 08 05 05 =1308+326 14 49 39 69.3 271.4 1.6 77.7 299 R 1 4247 07 59 29 08 05 55 3C274 14 50 29 51.5 243.8 2.3 49.3 9 1 11 4247 08 05 25 08 20 53 --- 15 05 29 48.7 247.4 2.6 51.3 898 F 1 1936 08 05 38 08 21 35 3C279 15 06 12 39.5 223.7 2.2 35.0 18 1 11 1936 08 20 53 08 23 35 --- 15 08 12 39.2 224.3 2.2 35.4 120 F 1 3018 08 20 53 08 24 18 3C274 15 08 55 48.1 248.2 2.6 51.7 20 1 11 3018 08 23 35 08 39 16 --- 15 23 55 45.1 251.4 2.9 53.3 898 F 1 9291 08 23 35 08 40 00 3C279 15 24 39 36.8 228.4 2.5 38.4 22 1 11 9291 08 39 16 08 42 00 --- 15 26 39 36.5 228.9 2.5 38.7 120 F 1 10383 08 39 16 08 42 44 3C274 15 27 24 44.5 252.1 2.9 53.6 23 1 11 10383 08 42 00 08 57 42 --- 15 42 24 41.5 255.1 3.2 54.8 898 F 1 16664 08 42 00 08 58 25 3C279 15 43 08 33.8 232.7 2.8 41.4 22 1 12 16664 08 57 42 09 00 25 --- 15 45 08 33.5 233.2 2.8 41.7 120 R 1 17448 08 57 42 Schedule for VLBA_PT (Code Pt ) Page 6 bw082 M87 movie pilot. Walker, Ly, Junor, Hardee 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 ---------------------------------------------------------------------------------------- --- Fri 21 Apr 2006 Day 111 --- 09 01 08 3C274 15 45 51 40.8 255.7 3.2 55.0 22 1 12 17448 09 00 25 09 16 06 --- 16 00 51 37.8 258.4 3.5 55.9 898 R 1 11176 09 00 25 09 16 45 3C279 16 01 31 30.7 236.7 3.1 44.0 19 1 12 11176 09 16 06 09 18 45 --- 16 03 31 30.4 237.1 3.1 44.2 120 R 1 10115 09 16 06 09 19 23 3C274 16 04 09 37.1 259.0 3.5 56.1 18 1 12 10115 09 18 45 09 34 21 --- 16 19 09 34.1 261.5 3.8 56.8 898 R 1 3875 09 18 45 09 34 57 3C279 16 19 45 27.5 240.4 3.4 46.2 16 1 12 3875 09 34 21 09 36 56 --- 16 21 45 27.2 240.8 3.4 46.4 120 R 1 2838 09 34 21 09 37 33 3C274 16 22 22 33.4 262.0 3.9 56.9 17 1 13 2838 09 36 56 09 52 31 --- 16 37 22 30.3 264.3 4.1 57.3 898 F 1 3390 09 36 56 09 53 07 3C279 16 37 59 24.2 243.8 3.7 48.2 17 1 13 3390 09 52 31 09 55 07 --- 16 39 59 23.8 244.2 3.7 48.4 120 F 1 4430 09 52 31 09 55 43 3C274 16 40 35 29.7 264.8 4.2 57.4 17 1 13 4430 09 55 07 10 10 41 --- 16 55 35 26.6 267.0 4.4 57.6 898 F 1 10658 09 55 07 10 11 16 3C279 16 56 10 20.8 247.0 4.0 49.9 16 1 13 10658 10 10 41 10 13 15 --- 16 58 10 20.4 247.4 4.0 50.0 120 F 1 11689 10 10 41 10 13 50 3C274 16 58 45 25.9 267.5 4.5 57.7 15 1 14 11689 10 13 15 10 28 48 --- 17 13 45 22.8 269.6 4.7 57.7 898 R 1 17295 10 13 15 10 29 21 3C279 17 14 18 17.3 250.1 4.3 51.3 14 1 14 17295 10 28 48 10 31 20 --- 17 16 18 16.9 250.4 4.3 51.5 120 R 1 16279 10 28 48 10 33 59 1726+455 17 18 58 78.7 367.8 -0.1 -170.8 30 1 14 16279 10 33 29 10 36 59 --- 17 21 58 78.7 365.1 -0.1 -174.0 180 R 1 14882 10 33 42 10 40 17 1751+288 17 25 16 81.8 130.1 -0.5 -46.2 35 1 14 14882 10 39 47 10 43 16 --- 17 28 16 82.2 133.4 -0.4 -43.2 180 R 1 13485 10 40 00 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: bw082.set Matches group v7mm_c8 in /home/filehost/cwalker/sched/catalogs/freq.dat Setup group: 6 Station: VLBA_PT 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= 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: 6 Setup file default. Used pcal sets: 1 LO sum= 43127.49 43127.49 43135.49 43135.49 BBC fr= 727.49 727.49 735.49 735.49 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 -- bw082 M87 movie pilot. Walker, Ly, Junor, Hardee 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) J0854+2006 08 51 57.250618 * 08 54 48.874930 08 55 10.791396 0.21 0851+202 20 17 58.41741 * 20 06 30.64086 20 05 10.33376 0.40 J0854+20 /home/filehost/cwalker/sched/catalogs/sources.vlba * OJ287 VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro 0.216 scan hours, 9.723 baseline hours above horizon. * J1159+2914 11 56 57.786209 * 11 59 31.833910 11 59 52.694997 0.23 1156+295 29 31 25.73874 * 29 14 43.82684 29 12 37.05144 0.40 J1159+29 /home/filehost/cwalker/sched/catalogs/sources.vlba VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro 0.249 scan hours, 11.219 baseline hours above horizon. J1230+1223 12 28 17.569279 * 12 30 49.423381 12 31 09.770533 0.31 1228+126 12 40 01.74901 * 12 23 28.04383 12 21 17.14059 0.20 * 3C274 /home/filehost/cwalker/sched/catalogs/sources.vlba J1230+12 VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro 7.230 scan hours, 292.449 baseline hours above horizon. J1256-0547 12 53 35.831291 * 12 56 11.166559 12 56 31.801981 0.20 1253-055 -05 31 07.99586 *-05 47 21.52472 -05 49 33.21172 0.30 * 3C279 /home/filehost/cwalker/sched/catalogs/sources.vlba J1256-05 VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro 0.964 scan hours, 36.334 baseline hours above horizon. * J1310+3220 13 08 07.560131 * 13 10 28.663850 13 10 48.162054 0.24 1308+326 32 36 40.23883 * 32 20 43.78290 32 18 37.85933 0.40 J1310+32 /home/filehost/cwalker/sched/catalogs/sources.vlba VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro 0.166 scan hours, 7.480 baseline hours above horizon. J1727+4530 17 26 01.198750 * 17 27 27.650804 17 27 39.743662 0.29 * 1726+455 45 33 04.55118 * 45 30 39.73133 45 29 57.42754 0.40 J1727+45 /home/filehost/cwalker/sched/catalogs/sources.vlba VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro 0.050 scan hours, 2.244 baseline hours above horizon. J1753+2848 17 51 45.401869 * 17 53 42.473641 17 53 57.954430 0.23 * 1751+288 28 48 36.64959 * 28 48 04.93887 28 47 38.40938 0.40 J1753+28 /home/filehost/cwalker/sched/catalogs/sources.vlba VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro 0.050 scan hours, 2.244 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) OJ287 99.6 J1159+2914 130.4 3C274 148.0 3C279 164.3 J1310+3220 134.6 1726+455 105.4 1751+288 109.6 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