COVER INFORMATION Station: VLBA_LA (Code La ) Experiment: BP120; 15 GHz obs of the fast superluminal 0827+243 Exp. Code: bp120e Schedule Version: 1.00 Processed by SCHED version: 6.02 July 2005 PI: Glenn Piner Address: Whittier College Dept. Physics and Astronomy 13406 E. Philadelphia St Whittier CA 90608 Phone: 562-464-4556 EMAIL: gpiner@whittier.edu Fax: 562-464-4514 Phone during observation: 562-464-4556 Observing mode: 128-8-1 Notes: Five epochs of 5 hours, with ~2 month separations Please use same keyin file for all five epochs Fringe finders/pol. cal. : J0423-01, OJ287, 3C279 Do not observe between 10-jul and 20-aug or between 20-sep and 2 Schedule for VLBA_LA (Code La ) Page 2 BP120; 15 GHz obs of the fast superluminal 0827+243 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). 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 ---------------------------------------------------------------------------------------- --- Mon 29 Aug 2005 Day 241 --- Next scan frequencies: 15349.49 15349.49 15357.49 15357.49 15365.49 15365.49 15373.49 15373.49 Next BBC frequencies: 749.49 749.49 757.49 757.49 765.49 765.49 773.49 773.49 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 14 40 52 J0423-01 06 07 30 45.7 218.8 1.7 30.6 0 1 1 0 14 40 52 14 44 51 --- 06 11 30 45.2 220.1 1.8 31.5 239 F 1 0 14 41 15 14 47 01 0827+243 06 13 40 58.2 101.8 -2.3 -60.5 45 1 1 0 14 47 01 15 06 57 --- 06 33 40 62.2 106.5 -2.0 -58.5 1197 F 1 0 14 47 24 15 09 17 J0423-01 06 36 00 41.7 227.1 2.2 36.4 53 1 1 0 15 09 17 15 13 16 --- 06 40 00 41.1 228.1 2.3 37.2 239 F 1 0 15 09 40 15 15 46 OJ287 06 42 30 57.0 109.4 -2.2 -54.6 64 1 1 0 15 15 46 15 19 45 --- 06 46 30 57.8 110.4 -2.1 -54.1 239 F 1 0 15 16 09 15 20 15 0827+243 06 47 00 64.7 110.2 -1.7 -56.6 10 1 1 0 15 20 15 15 34 13 --- 07 01 00 67.4 114.6 -1.5 -53.9 838 F 1 0 15 20 38 15 36 43 J0423-01 07 03 30 37.4 234.0 2.7 41.0 64 1 1 0 15 36 43 15 40 42 --- 07 07 30 36.8 235.0 2.7 41.6 239 F 1 0 15 37 06 15 43 11 0827+243 07 10 00 69.0 118.0 -1.4 -51.8 66 1 1 0 15 43 11 16 09 07 --- 07 36 00 73.4 130.5 -0.9 -42.5 1556 F 1 0 15 43 34 16 09 37 OJ287 07 36 30 66.7 127.0 -1.3 -43.6 11 1 1 0 16 09 37 16 14 06 --- 07 41 00 67.4 129.0 -1.2 -42.2 269 F 1 0 16 10 00 16 14 36 0827+243 07 41 30 74.2 133.9 -0.8 -39.9 10 1 1 0 16 14 36 16 40 32 --- 08 07 30 77.3 154.6 -0.4 -22.4 1556 F 1 0 16 14 59 16 40 32 0827+243 08 07 30 77.3 154.6 -0.4 -22.4 -4 1 1 0 16 40 32 17 07 28 --- 08 34 30 78.4 183.8 0.1 3.3 1612 F 1 0 16 40 32 17 08 27 OJ287 08 35 30 73.7 163.3 -0.3 -14.3 40 1 1 0 17 08 27 17 12 27 --- 08 39 30 73.9 166.6 -0.3 -11.5 239 F 1 0 17 08 50 17 13 27 0827+243 08 40 30 78.2 190.5 0.2 9.3 38 1 1 0 17 13 27 17 40 22 --- 09 07 30 76.0 216.5 0.6 31.9 1616 F 1 0 17 13 50 Schedule for VLBA_LA (Code La ) Page 3 BP120; 15 GHz obs of the fast superluminal 0827+243 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). 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 ---------------------------------------------------------------------------------------- --- Mon 29 Aug 2005 Day 241 --- 17 40 22 0827+243 09 07 30 76.0 216.5 0.6 31.9 -4 1 1 0 17 40 22 18 03 18 --- 09 30 30 72.7 231.8 1.0 44.4 1372 F 1 0 17 40 22 18 05 18 3C279 09 32 30 26.7 120.1 -3.4 -44.9 22 1 1 0 18 05 18 18 09 17 --- 09 36 30 27.4 120.9 -3.3 -44.4 239 F 1 0 18 05 41 18 11 17 OJ287 09 38 30 71.7 214.1 0.7 29.0 25 1 1 0 18 11 17 18 15 16 --- 09 42 30 71.2 216.7 0.8 31.1 239 F 1 0 18 11 40 18 16 16 0827+243 09 43 30 70.6 238.3 1.2 49.2 39 1 1 0 18 16 16 18 40 12 --- 10 07 30 66.2 247.4 1.6 55.2 1436 F 1 0 18 16 39 18 40 12 0827+243 10 07 30 66.2 247.4 1.6 55.2 -4 1 1 0 18 40 12 19 07 08 --- 10 34 30 61.0 254.9 2.1 59.2 1612 F 1 0 18 40 12 19 07 38 OJ287 10 35 00 63.1 241.1 1.7 49.1 15 1 1 0 19 07 38 19 11 37 --- 10 39 00 62.4 242.4 1.7 50.0 239 F 1 0 19 08 01 19 14 07 3C279 10 41 30 37.7 135.7 -2.2 -34.7 72 1 1 0 19 14 07 19 18 06 --- 10 45 30 38.3 136.7 -2.2 -34.0 239 F 1 0 19 14 30 19 18 36 0827+243 10 46 00 58.8 257.6 2.2 60.3 -57 1 1 0 19 18 36 19 33 34 --- 11 01 00 55.8 260.7 2.5 61.3 841 F 1 0 19 18 59 19 36 03 3C279 11 03 30 40.7 141.6 -1.9 -30.4 64 1 1 0 19 36 03 19 40 03 --- 11 07 30 41.2 142.8 -1.8 -29.6 239 F 1 0 19 36 26 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: /home/filehost/cwalker/sched/setups/v2cm-128-8-1.set Matches group v2cm_d3 in /home/filehost/cwalker/sched/catalogs/freq.dat Fourth 2cm filter Setup group: 5 Station: VLBA_LA Total bit rate: 128 Format: VLBA1:4 Bits per sample: 1 Sample rate: 16.000 Number of channels: 8 Speedup factor: 2.00 Disk used to record data. 1st LO= 14600.00 14600.00 14600.00 14600.00 14600.00 14600.00 14600.00 14600.00 Net SB= U U U U U U U U Pol. = RCP LCP RCP LCP RCP LCP RCP LCP BBC = 1 2 3 4 5 6 7 8 BBC SB= U U U U U U U U IF = B D B D B D B D VLBA FE= omit 2cm omit 2cm VLBA Synth= 14.6 10.9 10.9 The following frequency sets based on this setup were used. Frequency Set: 5 Setup file default. Used pcal sets: 1 LO sum= 15349.49 15349.49 15357.49 15357.49 15365.49 15365.49 15373.49 15373.49 BBC fr= 749.49 749.49 757.49 757.49 765.49 765.49 773.49 773.49 Bandwd= 8.000 8.000 8.000 8.000 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 S5 S7 S1 S3 S5 S7 PCALXB2= S2 S4 S6 S8 S2 S4 S6 S8 PCALFR1= 510 510 510 510 6510 6510 6510 6510 PCALFR2= 510 510 510 510 6510 6510 6510 6510 Track assignments are: track1= 2, 10, 18, 26, 3, 11, 19, 27 barrel=roll_off SOURCE LIST -- BP120; 15 GHz obs of the fast superluminal 0827+243 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) J0423-0120 04 20 43.539850 * 04 23 15.800727 04 23 32.820027 0.20 0420-014 -01 27 28.70008 *-01 20 33.06538 -01 19 31.08695 0.30 * J0423-01 /home/filehost/cwalker/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.199 scan hours, 8.975 baseline hours above horizon. J0830+2410 08 27 54.398590 * 08 30 52.086189 08 31 10.862765 0.22 * 0827+243 24 21 07.66381 * 24 10 59.82040 24 10 01.61406 0.40 J0830+24 /home/filehost/cwalker/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 3.806 scan hours, 170.238 baseline hours above horizon. J0854+2006 08 51 57.250617 * 08 54 48.874929 08 55 06.938779 0.21 0851+202 20 17 58.41740 * 20 06 30.64085 20 05 24.34774 0.40 J0854+20 /home/filehost/cwalker/sched/catalogs/sources.vlba * OJ287 VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.341 scan hours, 15.333 baseline hours above horizon. J1256-0547 12 53 35.831289 * 12 56 11.166557 12 56 27.491159 0.20 1253-055 -05 31 07.99581 *-05 47 21.52467 -05 49 06.18807 0.31 * 3C279 /home/filehost/cwalker/sched/catalogs/sources.vlba J1256-05 VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.199 scan hours, 8.366 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) J0423-01 92.5 0827+243 32.7 OJ287 26.0 3C279 38.8 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