COVER INFORMATION Station: VLBA_HN (Code Hn ) Experiment: Helical structure in B1524-136 jets Exp. Code: gm052a Schedule Version: 2.00 Processed by SCHED version: Release of 18 Sept. 2003 PI: Franco Mantovani Address: Istituto di Radioastronomia Via P. Gobetti, 101 I-40129 Bologna Italy Phone: +39 051 639 9377 EMAIL: fmantovani@ira.cnr.it Fax: +39 051 639 9431 Phone during observation: Observing mode: Continuum Notes: Schedule for VLBA_HN (Code Hn ) Page 2 Helical structure in B1524-136 jets 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). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Fri 13 Feb 2004 Day 44 --- Next scan frequencies: 8387.49 8395.49 8403.49 8411.49 8419.49 8427.49 8435.49 8443.49 Next BBC frequencies: 787.49 795.49 803.49 811.49 819.49 827.49 835.49 843.49 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 08 07 00 1524-136 12 49 55 22.7 138.2 -2.6 -30.2 0 1 1 0 08 07 00 08 29 00 --- 13 11 58 25.3 143.3 -2.3 -26.8 1320 F 1 17600 08 33 00 3C273 13 15 59 47.8 197.5 0.8 12.7 189 1 2 17600 08 33 00 08 37 00 --- 13 20 00 47.6 199.0 0.8 13.8 240 R 1 14400 08 41 00 1524-136 13 24 00 26.6 146.2 -2.1 -24.8 192 1 2 14400 08 41 00 08 59 00 --- 13 42 03 28.3 150.8 -1.8 -21.6 1080 R 1 0 09 01 00 1524-136 13 44 04 28.5 151.3 -1.7 -21.2 114 1 3 0 09 01 00 09 23 00 --- 14 06 07 30.2 157.1 -1.4 -17.1 1320 F 1 17600 09 25 00 1524-136 14 08 08 30.4 157.6 -1.3 -16.7 114 1 4 17600 09 25 00 09 47 00 --- 14 30 11 31.7 163.7 -1.0 -12.2 1320 R 1 0 09 49 00 1524-136 14 32 12 31.8 164.2 -0.9 -11.8 114 1 5 0 09 49 00 10 11 00 --- 14 54 15 32.7 170.5 -0.5 -7.2 1320 F 1 17600 10 13 00 1524-136 14 56 15 32.8 171.1 -0.5 -6.7 114 1 6 17600 10 13 00 10 35 00 --- 15 18 19 33.2 177.4 -0.1 -1.9 1320 R 1 0 10 39 00 3C273 15 22 20 33.9 235.5 2.9 37.2 195 1 7 0 10 39 00 10 43 00 --- 15 26 20 33.2 236.5 3.0 37.7 240 F 1 3200 10 47 00 1524-136 15 30 21 33.2 180.9 0.1 0.7 197 1 7 3200 10 47 00 11 05 00 --- 15 48 24 33.0 186.1 0.4 4.6 1080 F 1 17600 11 07 00 1524-136 15 50 24 33.0 186.7 0.4 5.1 114 1 8 17600 11 07 00 11 29 00 --- 16 12 28 32.3 193.0 0.8 9.8 1320 R 1 0 11 31 00 1524-136 16 14 28 32.2 193.6 0.8 10.2 114 1 9 0 11 31 00 11 53 00 --- 16 36 32 31.0 199.7 1.2 14.7 1320 F 1 17600 11 55 00 1524-136 16 38 32 30.9 200.3 1.2 15.1 114 1 10 17600 11 55 00 12 17 00 --- 17 00 36 29.3 206.2 1.6 19.4 1320 R 1 0 Schedule for VLBA_HN (Code Hn ) Page 3 Helical structure in B1524-136 jets 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). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Fri 13 Feb 2004 Day 44 --- 12 21 00 3C273 17 04 36 16.8 256.7 4.6 45.5 200 1 11 0 12 21 00 12 25 00 --- 17 08 37 16.1 257.4 4.7 45.7 240 F 1 3200 12 29 00 1524-136 17 12 38 28.3 209.3 1.8 21.7 202 1 11 3200 12 29 00 12 47 00 --- 17 30 41 26.5 213.8 2.1 24.8 1080 F 1 17600 ----------- Tape Change ------------ 13 04 00 1524-136 17 47 44 24.7 218.0 2.3 27.6 1010 2 1 0 13 04 00 13 26 00 --- 18 09 47 22.1 223.0 2.7 31.0 1320 F 1 17600 13 28 00 1524-136 18 11 47 21.8 223.5 2.7 31.3 114 2 2 17600 13 28 00 13 50 00 --- 18 33 51 18.9 228.3 3.1 34.3 1320 R 1 0 13 52 00 1524-136 18 35 51 18.7 228.7 3.1 34.5 114 2 3 0 13 52 00 14 14 00 --- 18 57 55 15.5 233.3 3.5 37.2 1320 F 1 17600 14 16 00 1524-136 18 59 55 15.2 233.7 3.5 37.4 114 2 4 17600 14 16 00 14 38 00 --- 19 21 59 11.9 238.0 3.9 39.7 1320 R 1 0 14 40 00 1524-136 19 23 59 11.6 238.3 3.9 39.9 114 2 5 0 14 40 00 15 02 00 --- 19 46 03 8.1 242.4 4.3 42.0 1320 F 1 17600 15 04 00 1524-136 19 48 03 7.7 242.8 4.3 42.1 114 2 6 17600 15 04 00 15 22 00 --- 20 06 06 4.8 246.0 4.6 H 43.6 0 R 1 3200 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: /irasoft/sched/setups/v4cm-256-8-2-R.set Matches group v4cm_3 in /irasoft/sched/catalogs/freq.dat Setup group: 8 Station: VLBA Total bit rate: 256 Format: VLBA1:2 Bits per sample: 2 Sample rate: 16.000 Number of channels: 8 Passes/head pos: 1 Speedup factor: 1.00 Tape speeds: Low density - 266.660 ips, High density - 160.00 ips Time per pass for 17600 ft, High density tapes is: 00:22:00 1st LO= 7600.00 7600.00 7600.00 7600.00 7600.00 7600.00 7600.00 7600.00 Net SB= U U U U U U U U Pol. = RCP RCP RCP RCP RCP RCP RCP RCP BBC = 1 2 3 4 5 6 7 8 BBC SB= U U U U U U U U IF = B B B B B B B B VLBA FE= omit 4cm omit 4cm VLBA Synth= 7.6 15.4 15.4 The following frequency sets based on this setup were used. Frequency Set: 8 Setup file default. Used pcal sets: 1 LO sum= 8387.49 8395.49 8403.49 8411.49 8419.49 8427.49 8435.49 8443.49 BBC fr= 787.49 795.49 803.49 811.49 819.49 827.49 835.49 843.49 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 -- Helical structure in B1524-136 jets 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). Source Source position (RA/Dec) (B1950) (J2000) (Date) * 3C273 12 26 33.245804 * 12 29 06.699700 12 29 19.577652 02 19 43.30550 * 02 03 08.59800 02 01 43.15285 From catalog imbedded in main SCHED input file. * OQ208 14 04 45.615152 * 14 07 00.394411 14 07 11.579404 28 41 29.23491 * 28 27 14.68994 28 25 50.10005 From catalog imbedded in main SCHED input file. * 1524-136 15 24 12.880517 * 15 26 59.450000 15 27 12.349893 -13 40 34.86530 *-13 51 00.10000 -13 51 55.35258 From catalog imbedded in main SCHED input file. J1642+6856 16 42 18.064884 * 16 42 07.848514 16 42 06.219180 * 1642+690 69 02 13.21712 * 68 56 39.75640 68 55 47.82456 J1642+68 /irasoft/sched/catalogs/sources.vlba ICRF - Ext.1 Source - 1998 IERS Annual Report 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) 3C273 137.9 OQ208 117.8 1524-136 91.1 1642+690 97.6 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