COVER INFORMATION Station: VLBA_OV (Code Ov ) Experiment: BP120; 15 GHz obs of the fast superluminal 0827+243 Exp. Code: bp120a Schedule Version: 1.00 Processed by SCHED version: NRAO internal release of 4 October 2004 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_OV (Code Ov ) 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) ---------------------------------------------------------------------------------------- --- Mon 14 Feb 2005 Day 45 --- 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 03 35 26 J0423-01 05 19 22 49.3 201.7 0.9 17.1 0 1 1 0 03 35 26 03 39 25 --- 05 23 22 49.0 203.2 1.0 18.3 239 F 1 1596 03 41 35 0827+243 05 25 32 48.5 94.7 -3.1 -60.4 51 1 1 1596 03 41 35 04 01 32 --- 05 45 32 52.4 98.3 -2.8 -59.7 1197 F 1 9574 04 03 51 J0423-01 05 47 52 46.8 211.7 1.4 24.7 58 1 1 9574 04 03 51 04 07 51 --- 05 51 52 46.3 213.0 1.5 25.7 239 F 1 11169 04 10 20 OJ287 05 54 22 47.3 100.8 -3.0 -56.4 69 1 1 11169 04 10 20 04 14 19 --- 05 58 22 48.1 101.6 -2.9 -56.2 239 F 1 12765 04 14 49 0827+243 05 58 52 55.0 100.9 -2.5 -59.0 10 1 2 12765 04 14 49 04 28 47 --- 06 12 52 57.8 103.9 -2.3 -57.9 838 R 1 16850 04 31 17 J0423-01 06 15 22 43.6 220.3 1.9 31.0 66 1 2 16850 04 31 17 04 35 16 --- 06 19 22 43.0 221.5 1.9 31.8 239 R 1 15255 04 37 46 0827+243 06 21 52 59.5 106.1 -2.2 -57.0 67 1 2 15255 04 37 46 05 03 41 --- 06 47 52 64.4 113.3 -1.7 -53.3 1556 R 1 4883 05 04 11 OJ287 06 48 22 57.6 113.1 -2.1 -51.3 10 1 2 4883 05 04 11 05 08 41 --- 06 52 52 58.4 114.3 -2.0 -50.6 269 R 1 3088 05 09 10 0827+243 06 53 22 65.4 115.1 -1.6 -52.2 10 1 3 3088 05 09 10 05 35 06 --- 07 19 22 69.8 125.3 -1.2 -45.4 1556 F 1 7284 05 35 06 0827+243 07 19 22 69.8 125.3 -1.2 -45.4 -4 1 4 7284 05 35 06 06 02 02 --- 07 46 22 73.8 140.6 -0.7 -33.7 1612 R 1 17146 06 03 02 OJ287 07 47 22 67.4 134.6 -1.1 -37.1 41 1 4 17146 06 03 02 06 07 01 --- 07 51 22 67.9 136.6 -1.1 -35.6 239 R 1 15550 06 08 01 0827+243 07 52 22 74.5 144.8 -0.6 -30.2 41 1 4 15550 06 08 01 06 34 56 --- 08 19 22 76.7 168.2 -0.2 -10.3 1616 R 1 4780 Schedule for VLBA_OV (Code Ov ) 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) ---------------------------------------------------------------------------------------- --- Mon 14 Feb 2005 Day 45 --- 06 34 56 0827+243 08 19 22 76.7 168.2 -0.2 -10.3 -4 1 5 4780 06 34 56 06 57 53 --- 08 42 22 76.7 191.2 0.2 9.7 1372 F 1 4395 06 59 52 3C279 08 44 22 17.3 111.8 -4.2 -48.0 -5 1 5 4395 06 59 52 07 03 52 --- 08 48 22 18.1 112.5 -4.1 -47.7 234 F 1 5991 07 05 51 OJ287 08 50 22 72.8 176.2 -0.1 -3.2 4 1 5 5991 07 05 51 07 09 51 --- 08 54 22 72.9 179.4 0.0 -0.5 239 F 1 7586 07 10 50 0827+243 08 55 22 75.9 203.3 0.4 20.2 38 1 5 7586 07 10 50 07 34 47 --- 09 19 22 73.4 221.7 0.8 35.5 1436 F 1 17160 07 34 47 0827+243 09 19 22 73.4 221.7 0.8 35.5 -4 1 6 17160 07 34 47 08 01 42 --- 09 46 22 69.3 236.2 1.3 46.5 1612 R 1 6390 08 02 12 OJ287 09 46 52 69.5 216.9 0.9 30.6 11 1 6 6390 08 02 12 08 06 11 --- 09 50 52 69.0 219.1 0.9 32.3 239 R 1 4794 08 08 41 3C279 09 53 22 29.4 125.1 -3.1 -40.9 64 1 6 4794 08 08 41 08 12 40 --- 09 57 22 30.1 125.9 -3.0 -40.4 239 R 1 3199 08 13 10 0827+243 09 57 52 67.3 241.0 1.4 49.7 -53 1 7 3199 08 13 10 08 28 08 --- 10 12 52 64.7 246.2 1.7 53.0 845 F 1 2785 08 30 37 3C279 10 15 22 32.9 130.0 -2.7 -37.8 66 1 7 2785 08 30 37 08 34 37 --- 10 19 22 33.5 131.0 -2.6 -37.2 239 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/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: 1 Station: VLBA 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: 1 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) (B1950) (J2000) (Date) J0423-0120 04 20 43.539850 * 04 23 15.800727 04 23 31.336990 0420-014 -01 27 28.70002 *-01 20 33.06531 -01 19 51.51387 * J0423-01 /home/filehost/cwalker/sched/catalogs/sources.vlba ICRF - Ext.1 Source - 1998 IERS Annual Report 0.199 scan hours, 8.975 baseline hours above horizon. J0830+2410 08 27 54.398594 * 08 30 52.086193 08 31 11.370219 * 0827+243 24 21 07.66387 * 24 10 59.82046 24 10 01.06563 J0830+24 /home/filehost/cwalker/sched/catalogs/sources.vlba ICRF - Ext.1 Source - 1998 IERS Annual Report 3.806 scan hours, 170.238 baseline hours above horizon. J0854+2006 08 51 57.250612 * 08 54 48.874924 08 55 07.531887 0851+202 20 17 58.41743 * 20 06 30.64088 20 05 22.18180 J0854+20 /home/filehost/cwalker/sched/catalogs/sources.vlba * OJ287 ICRF - Ext.1 Source - 1998 IERS Annual Report 0.341 scan hours, 15.333 baseline hours above horizon. J1256-0547 12 53 35.831293 * 12 56 11.166560 12 56 27.464722 1253-055 -05 31 07.99572 *-05 47 21.52458 -05 49 05.94426 * 3C279 /home/filehost/cwalker/sched/catalogs/sources.vlba J1256-05 ICRF - Ext.1 Source - 1998 IERS Annual Report 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 97.5 0827+243 157.9 OJ287 164.7 3C279 130.4 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