COVER INFORMATION Station: VLBA_FD (Code Fd ) Experiment: BP120; 15 GHz obs of the fast superluminal 0827+243 Exp. Code: bp120b Schedule Version: 1.00 Processed by SCHED version: 6.01 Release: Late March 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_FD (Code Fd ) 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). 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) ---------------------------------------------------------------------------------------- --- Thu 7 Apr 2005 Day 97 --- 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 00 10 59 J0423-01 06 16 42 48.2 225.3 1.9 37.7 0 1 1 0 00 10 59 00 14 58 --- 06 20 42 47.6 226.5 2.0 38.6 239 F 1 1596 00 17 08 0827+243 06 22 52 60.9 94.9 -2.1 -70.0 36 1 1 1596 00 17 08 00 37 04 --- 06 42 52 65.2 98.4 -1.8 -68.9 1197 F 1 9574 00 39 24 J0423-01 06 45 12 43.6 233.1 2.4 43.5 44 1 1 9574 00 39 24 00 43 23 --- 06 49 12 42.9 234.1 2.4 44.2 239 F 1 11169 00 45 53 OJ287 06 51 42 60.3 103.5 -2.1 -63.0 57 1 1 11169 00 45 53 00 49 52 --- 06 55 42 61.1 104.3 -2.0 -62.6 239 F 1 12765 00 50 22 0827+243 06 56 12 68.0 101.3 -1.6 -67.6 10 1 2 12765 00 50 22 01 04 20 --- 07 10 12 70.9 104.9 -1.3 -65.7 838 R 1 16850 01 06 49 J0423-01 07 12 42 38.6 239.5 2.8 47.8 54 1 2 16850 01 06 49 01 10 49 --- 07 16 42 37.9 240.3 2.9 48.4 239 R 1 15255 01 13 18 0827+243 07 19 12 72.8 107.7 -1.2 -64.0 55 1 2 15255 01 13 18 01 39 14 --- 07 45 12 77.9 119.6 -0.8 -55.1 1556 R 1 4883 01 39 44 OJ287 07 45 42 71.1 119.9 -1.2 -52.6 10 1 2 4883 01 39 44 01 44 13 --- 07 50 12 72.0 122.0 -1.1 -51.0 269 R 1 3088 01 44 43 0827+243 07 50 42 78.9 123.3 -0.7 -52.0 10 1 3 3088 01 44 43 02 10 39 --- 08 16 42 82.8 152.7 -0.2 -25.6 1556 F 1 7284 02 10 39 0827+243 08 16 42 82.8 152.7 -0.2 -25.6 -4 1 4 7284 02 10 39 02 37 34 --- 08 43 42 83.0 204.0 0.2 22.5 1612 R 1 17146 02 38 34 OJ287 08 44 42 79.2 166.8 -0.2 -12.0 29 1 4 17146 02 38 34 02 42 34 --- 08 48 42 79.4 171.8 -0.1 -7.5 239 R 1 15550 02 43 33 0827+243 08 49 42 82.3 213.5 0.3 31.4 26 1 4 15550 02 43 33 03 10 29 --- 09 16 42 78.0 240.1 0.8 54.8 1616 R 1 4780 Schedule for VLBA_FD (Code Fd ) 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). 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) ---------------------------------------------------------------------------------------- --- Thu 7 Apr 2005 Day 97 --- 03 10 29 0827+243 09 16 42 78.0 240.1 0.8 54.8 -4 1 5 4780 03 10 29 03 33 25 --- 09 39 42 73.5 251.1 1.1 63.2 1372 F 1 4395 03 35 25 3C279 09 41 42 30.9 119.4 -3.2 -48.9 26 1 5 4395 03 35 25 03 39 24 --- 09 45 42 31.6 120.2 -3.2 -48.4 239 F 1 5991 03 41 24 OJ287 09 47 42 74.1 231.4 0.9 45.7 29 1 5 5991 03 41 24 03 45 23 --- 09 51 42 73.5 233.7 0.9 47.6 239 F 1 7586 03 46 23 0827+243 09 52 42 70.8 255.3 1.4 65.8 39 1 5 7586 03 46 23 04 10 19 --- 10 16 42 65.8 261.0 1.8 68.7 1436 F 1 17160 04 10 19 0827+243 10 16 42 65.8 261.0 1.8 68.7 -4 1 6 17160 04 10 19 04 37 15 --- 10 43 42 60.0 265.7 2.2 70.1 1612 R 1 6390 04 37 45 OJ287 10 44 12 63.3 253.2 1.8 61.3 16 1 6 6390 04 37 45 04 41 44 --- 10 48 12 62.5 254.2 1.9 61.8 239 R 1 4794 04 44 14 3C279 10 50 42 42.7 135.0 -2.1 -37.7 64 1 6 4794 04 44 14 04 48 13 --- 10 54 42 43.3 136.1 -2.0 -36.8 239 R 1 3199 04 48 43 0827+243 10 55 12 57.5 267.5 2.4 70.4 -64 1 7 3199 04 48 43 05 03 40 --- 11 10 12 54.3 269.5 2.7 70.6 834 F 1 2785 05 06 10 3C279 11 12 42 45.9 141.3 -1.7 -32.7 58 1 7 2785 05 06 10 05 10 09 --- 11 16 42 46.4 142.5 -1.7 -31.8 239 F 1 4381 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: /home/arana/cwalker/sched/setups/v2cm-128-8-1.set Matches group v2cm_d3 in /home/arana/cwalker/sched/catalogs/freq.dat Fourth 2cm filter Setup group: 4 Station: VLBA_FD Total bit rate: 128 Format: VLBA1:4 Bits per sample: 1 Sample rate: 16.000 Number of channels: 8 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= 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: 4 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_auto 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 30.570809 0.20 0420-014 -01 27 28.70008 *-01 20 33.06538 -01 19 51.00077 0.30 * J0423-01 /home/arana/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 10.906211 0.22 * 0827+243 24 21 07.66381 * 24 10 59.82040 24 10 04.19811 0.40 J0830+24 /home/arana/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 07.177553 0.21 0851+202 20 17 58.41740 * 20 06 30.64085 20 05 24.63747 0.40 J0854+20 /home/arana/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 28.293183 0.20 1253-055 -05 31 07.99581 *-05 47 21.52467 -05 49 11.19874 0.31 * 3C279 /home/arana/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 50.4 0827+243 106.7 OJ287 113.2 3C279 177.8 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