COVER INFORMATION Station: VLBA_BR (Code Br ) 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_BR (Code Br ) 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 06 43 45 51.5 125.1 -2.2 -35.5 0 1 1 0 00 46 08 00 54 37 --- 06 51 45 52.5 127.6 -2.1 -34.3 479 F 1 8 00 46 31 00 56 41 3C274 06 53 49 12.9 85.8 -5.6 -43.0 39 1 1 8 00 56 11 01 11 38 --- 07 08 49 15.4 88.6 -5.4 -43.1 898 F 1 23 00 56 34 01 15 05 3C274 07 12 16 16.0 89.2 -5.3 -43.1 199 1 1 23 01 14 35 01 30 02 --- 07 27 16 18.5 92.0 -5.1 -43.1 898 F 1 38 01 14 58 01 33 29 3C274 07 30 43 19.1 92.7 -5.0 -43.0 200 1 1 38 01 32 59 01 48 27 --- 07 45 43 21.6 95.5 -4.8 -42.8 898 F 1 53 01 33 22 01 49 11 3C279 07 46 27 3.9 103.2 -5.2 H -40.8 3 1 1 53 01 48 27 01 51 10 --- 07 48 27 4.2 103.6 -5.1 H -40.7 0 F 1 56 01 48 27 01 51 55 3C274 07 49 12 22.2 96.2 -4.7 -42.8 2 1 1 56 01 51 10 02 06 52 --- 08 04 12 24.6 99.1 -4.4 -42.4 898 F 1 71 01 51 10 02 07 36 3C279 08 04 56 6.9 106.7 -4.9 -40.0 3 1 1 71 02 06 52 02 09 36 --- 08 06 56 7.2 107.1 -4.8 -39.9 120 F 1 74 02 06 52 02 10 21 3C274 08 07 41 25.2 99.8 -4.4 -42.3 3 1 1 74 02 09 36 02 25 18 --- 08 22 41 27.7 102.9 -4.1 -41.8 898 F 1 89 02 09 36 02 26 03 3C279 08 23 25 9.8 110.3 -4.6 -39.0 3 1 1 89 02 25 18 02 28 02 --- 08 25 25 10.1 110.7 -4.5 -38.9 120 F 1 91 02 25 18 02 28 47 3C274 08 26 10 28.2 103.6 -4.1 -41.6 2 1 1 91 02 28 02 02 43 44 --- 08 41 10 30.6 106.8 -3.8 -40.9 898 F 1 107 02 28 02 02 44 29 3C279 08 41 55 12.7 114.0 -4.2 -37.8 2 1 1 107 02 43 44 02 46 28 --- 08 43 55 13.0 114.4 -4.2 -37.7 120 F 1 109 02 43 44 02 47 13 3C274 08 44 39 31.2 107.5 -3.8 -40.7 2 1 1 109 02 46 28 03 02 11 --- 08 59 39 33.6 110.8 -3.5 -39.7 898 F 1 124 02 46 28 03 02 54 3C279 09 00 23 15.4 117.8 -3.9 -36.4 2 1 1 124 03 02 11 03 04 54 --- 09 02 23 15.7 118.2 -3.9 -36.3 120 F 1 127 03 02 11 Schedule for VLBA_BR (Code Br ) 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 --- 03 06 54 OJ287 09 04 23 61.9 184.6 0.2 3.3 21 1 1 127 03 06 24 03 11 53 --- 09 09 23 61.8 187.1 0.2 5.0 299 F 1 132 03 06 47 03 13 43 J1159+2914 09 11 14 52.7 104.9 -2.8 -47.6 50 1 1 132 03 13 13 03 18 42 =1156+295 09 16 14 53.5 106.1 -2.7 -47.3 299 F 1 138 03 13 36 03 19 44 3C274 09 17 15 36.3 114.9 -3.2 -38.3 21 1 1 138 03 19 14 03 34 41 --- 09 32 15 38.5 118.5 -3.0 -36.9 898 F 1 153 03 19 37 03 35 26 3C279 09 33 00 20.1 124.7 -3.4 -33.5 1 1 1 153 03 34 41 03 37 25 --- 09 35 00 20.4 125.2 -3.4 -33.3 120 F 1 155 03 34 41 03 38 10 3C274 09 35 45 39.0 119.4 -2.9 -36.5 1 1 1 155 03 37 25 03 53 08 --- 09 50 45 41.1 123.3 -2.7 -34.8 898 F 1 170 03 37 25 03 53 52 3C279 09 51 29 22.5 128.9 -3.1 -31.5 1 1 1 170 03 53 08 03 55 52 --- 09 53 29 22.8 129.4 -3.1 -31.2 120 F 1 173 03 53 08 03 56 36 3C274 09 54 14 41.6 124.2 -2.6 -34.4 1 1 1 173 03 55 52 04 11 34 --- 10 09 14 43.6 128.4 -2.4 -32.4 898 F 1 188 03 55 52 04 12 18 3C279 10 09 58 24.9 133.2 -2.8 -29.3 1 1 1 188 04 11 34 04 14 17 --- 10 11 58 25.1 133.7 -2.7 -29.0 120 F 1 191 04 11 34 04 15 02 3C274 10 12 42 44.1 129.4 -2.3 -31.9 0 1 1 191 04 14 17 04 29 59 --- 10 27 42 46.0 133.9 -2.1 -29.5 898 F 1 206 04 14 17 04 30 43 3C279 10 28 26 27.0 137.7 -2.5 -26.8 0 1 1 206 04 29 59 04 32 43 --- 10 30 26 27.3 138.2 -2.4 -26.5 120 F 1 209 04 29 59 04 33 27 3C274 10 31 11 46.4 134.9 -2.0 -28.9 0 1 1 209 04 32 43 04 48 25 --- 10 46 11 48.1 139.7 -1.7 -26.2 898 F 1 224 04 32 43 04 49 09 3C279 10 46 55 29.0 142.4 -2.2 -24.1 0 1 1 224 04 48 25 04 51 09 --- 10 48 55 29.2 143.0 -2.1 -23.8 120 F 1 227 04 48 25 04 51 53 3C274 10 49 40 48.5 140.9 -1.7 -25.5 0 1 1 227 04 51 09 05 06 51 --- 11 04 40 49.9 146.0 -1.4 -22.5 898 F 1 242 04 51 09 05 07 35 3C279 11 05 24 30.8 147.3 -1.9 -21.2 0 1 1 242 05 06 51 05 09 35 --- 11 07 24 31.0 147.9 -1.8 -20.9 120 F 1 244 05 06 51 Schedule for VLBA_BR (Code Br ) 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 --- 05 10 19 3C274 11 08 09 50.3 147.2 -1.4 -21.7 0 1 1 244 05 09 35 05 25 17 --- 11 23 09 51.5 152.7 -1.1 -18.3 898 F 1 260 05 09 35 05 26 01 3C279 11 23 53 32.3 152.4 -1.5 -18.1 0 1 1 260 05 25 17 05 28 01 --- 11 25 53 32.5 153.0 -1.5 -17.7 120 F 1 262 05 25 17 05 30 01 J1159+2914 11 27 53 70.1 159.1 -0.5 -15.8 38 1 1 262 05 29 31 05 35 00 =1156+295 11 32 53 70.4 162.2 -0.4 -13.5 299 F 1 268 05 29 54 05 37 01 J1310+3220 11 34 55 66.0 122.5 -1.6 -41.8 89 1 1 268 05 36 31 05 42 00 =1308+326 11 39 55 66.7 124.4 -1.5 -40.6 299 F 1 273 05 36 54 05 44 47 3C274 11 42 42 52.8 160.2 -0.8 -13.4 133 1 1 273 05 44 17 05 59 44 --- 11 57 42 53.5 166.2 -0.6 -9.4 898 F 1 288 05 44 40 06 00 29 3C279 11 58 27 34.6 162.4 -1.0 -11.7 0 1 1 288 05 59 44 06 02 28 --- 12 00 27 34.7 163.0 -0.9 -11.3 120 F 1 291 05 59 44 06 03 13 3C274 12 01 11 53.7 167.6 -0.5 -8.5 0 1 1 291 06 02 28 06 18 10 --- 12 16 11 54.1 173.8 -0.2 -4.3 898 F 1 306 06 02 28 06 18 54 3C279 12 16 55 35.3 167.9 -0.7 -8.1 0 1 1 306 06 18 10 06 20 53 --- 12 18 55 35.4 168.5 -0.6 -7.7 120 F 1 308 06 18 10 06 21 37 3C274 12 19 38 54.1 175.2 -0.2 -3.3 0 1 1 308 06 20 53 06 36 35 --- 12 34 38 54.2 181.5 0.1 1.0 898 F 1 324 06 20 53 06 37 17 3C279 12 35 21 35.8 173.5 -0.4 -4.4 0 1 1 324 06 36 35 06 39 17 --- 12 37 21 35.9 174.1 -0.3 -3.9 120 F 1 326 06 36 35 06 40 00 3C274 12 38 04 54.2 182.9 0.1 2.0 0 1 1 326 06 39 17 06 54 57 --- 12 53 04 53.9 189.1 0.4 6.2 898 F 1 341 06 39 17 06 55 39 3C279 12 53 46 36.0 179.1 0.0 -0.6 0 1 1 341 06 54 57 06 57 39 --- 12 55 46 36.0 179.8 0.0 -0.2 120 F 1 344 06 54 57 06 58 20 3C274 12 56 28 53.8 190.5 0.4 7.2 0 1 1 344 06 57 39 07 13 18 --- 13 11 28 53.2 196.6 0.7 11.3 898 F 1 359 06 57 39 07 13 58 3C279 13 12 08 35.9 184.8 0.3 3.2 0 1 1 359 07 13 18 07 15 58 --- 13 14 08 35.9 185.4 0.3 3.6 120 F 1 362 07 13 18 Schedule for VLBA_BR (Code Br ) 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 --- 07 16 38 3C274 13 14 49 53.1 197.9 0.7 12.1 0 1 1 362 07 15 58 07 31 36 --- 13 29 49 52.2 203.8 1.0 16.0 898 F 1 377 07 15 58 07 32 15 3C279 13 30 28 35.5 190.4 0.6 7.0 0 1 1 377 07 31 36 07 34 15 --- 13 32 28 35.5 191.0 0.6 7.4 120 F 1 379 07 31 36 07 34 54 3C274 13 33 07 52.0 205.1 1.0 16.8 0 1 1 379 07 34 15 07 49 51 --- 13 48 07 50.8 210.6 1.3 20.4 898 F 1 394 07 34 15 07 50 30 3C279 13 48 46 34.8 195.9 0.9 10.6 1 1 1 394 07 49 51 07 52 30 --- 13 50 46 34.7 196.5 0.9 11.0 120 F 1 397 07 49 51 07 54 30 J1159+2914 13 52 46 61.2 239.1 1.9 41.0 61 1 1 397 07 54 00 07 59 29 =1156+295 13 57 46 60.5 240.8 2.0 41.9 299 F 1 402 07 54 23 08 00 06 J1310+3220 13 58 23 71.8 213.9 0.8 26.1 8 1 1 402 07 59 29 08 05 05 =1308+326 14 03 23 71.3 216.9 0.9 28.3 299 F 1 408 07 59 29 08 05 55 3C274 14 04 14 49.3 216.3 1.6 23.9 0 1 1 408 08 05 25 08 20 53 --- 14 19 14 47.7 221.3 1.8 26.8 898 F 1 423 08 05 48 08 21 35 3C279 14 19 56 33.0 205.0 1.4 16.5 7 1 1 423 08 20 53 08 23 35 --- 14 21 56 32.9 205.5 1.4 16.8 120 F 1 425 08 20 53 08 24 18 3C274 14 22 40 47.4 222.4 1.9 27.4 8 1 1 425 08 23 35 08 39 16 --- 14 37 40 45.6 227.1 2.1 30.0 898 F 1 440 08 23 35 08 40 00 3C279 14 38 24 31.6 210.1 1.7 19.7 10 1 1 440 08 39 16 08 42 00 --- 14 40 24 31.4 210.7 1.7 20.0 120 F 1 443 08 39 16 08 42 44 3C274 14 41 09 45.2 228.1 2.2 30.6 11 1 1 443 08 42 00 08 57 42 --- 14 56 09 43.2 232.5 2.4 32.8 898 F 1 458 08 42 00 08 58 25 3C279 14 56 52 29.9 215.1 2.0 22.7 11 1 1 458 08 57 42 09 00 25 --- 14 58 52 29.7 215.7 2.0 23.0 120 F 1 461 08 57 42 09 01 08 3C274 14 59 36 42.8 233.4 2.5 33.3 11 1 1 461 09 00 25 09 16 06 --- 15 14 36 40.7 237.5 2.7 35.2 898 F 1 476 09 00 25 09 16 45 3C279 15 15 15 28.1 219.9 2.3 25.5 8 1 1 476 09 16 06 09 18 45 --- 15 17 15 27.8 220.4 2.3 25.8 120 F 1 479 09 16 06 Schedule for VLBA_BR (Code Br ) 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 19 23 3C274 15 17 54 40.3 238.3 2.8 35.6 8 1 1 479 09 18 45 09 34 21 --- 15 32 54 38.1 242.2 3.0 37.2 898 F 1 494 09 18 45 09 34 57 3C279 15 33 30 26.0 224.5 2.6 28.0 6 1 1 494 09 34 21 09 36 56 --- 15 35 30 25.8 224.9 2.6 28.3 120 F 1 496 09 34 21 09 37 33 3C274 15 36 07 37.6 242.9 3.1 37.5 7 1 1 496 09 36 56 09 52 31 --- 15 51 07 35.3 246.5 3.3 38.8 898 F 1 511 09 36 56 09 53 07 3C279 15 51 43 23.8 228.8 2.9 30.3 7 1 1 511 09 52 31 09 55 07 --- 15 53 43 23.6 229.3 3.0 30.6 120 F 1 514 09 52 31 09 55 43 3C274 15 54 20 34.9 247.3 3.4 39.1 8 1 1 514 09 55 07 10 10 41 --- 16 09 20 32.5 250.7 3.6 40.1 898 F 1 529 09 55 07 10 11 16 3C279 16 09 55 21.5 233.0 3.2 32.4 7 1 1 529 10 10 41 10 13 15 --- 16 11 55 21.2 233.5 3.3 32.6 120 F 1 531 10 10 41 10 13 50 3C274 16 12 30 32.0 251.4 3.7 40.3 7 1 1 531 10 13 15 10 28 48 --- 16 27 30 29.6 254.6 3.9 41.2 898 F 1 546 10 13 15 10 29 21 3C279 16 28 03 19.0 237.0 3.5 34.2 5 1 1 546 10 28 48 10 31 20 --- 16 30 03 18.7 237.4 3.6 34.4 120 F 1 549 10 28 48 10 33 59 1726+455 16 32 42 80.3 100.5 -0.9 -69.4 30 1 1 549 10 33 29 10 36 59 --- 16 35 42 80.7 101.7 -0.9 -68.8 180 F 1 552 10 33 52 10 40 17 1751+288 16 39 01 65.9 136.5 -1.2 -31.6 162 1 1 552 10 39 47 10 43 16 --- 16 42 01 66.2 137.9 -1.2 -30.7 180 F 1 556 10 40 10 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: 9 Station: VLBA_BR Total bit rate: 128 Format: VLBA1:4 Bits per sample: 2 Sample rate: 16.000 Number of channels: 4 Speedup factor: 2.00 Disk used to record data. 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: 9 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_off 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