COVER INFORMATION Station: VLBA_NL (Code Nl ) 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_NL (Code Nl ) 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 11 31 34 12.4 121.7 -3.9 -40.8 0 1 1 0 08 07 00 08 29 00 --- 11 53 37 15.8 125.9 -3.6 -38.5 1320 F 1 17600 08 33 00 3C273 11 57 38 49.6 167.7 -0.5 -9.1 166 1 2 17600 08 33 00 08 37 00 --- 12 01 39 49.8 169.3 -0.5 -8.0 240 R 1 14400 08 41 00 1524-136 12 05 39 17.6 128.3 -3.4 -37.1 170 1 2 14400 08 41 00 08 59 00 --- 12 23 42 20.2 132.1 -3.1 -34.8 1080 R 1 0 09 01 00 1524-136 12 25 43 20.4 132.5 -3.0 -34.5 114 1 3 0 09 01 00 09 23 00 --- 12 47 46 23.3 137.3 -2.7 -31.4 1320 F 1 17600 09 25 00 1524-136 12 49 47 23.6 137.8 -2.6 -31.1 114 1 4 17600 09 25 00 09 47 00 --- 13 11 50 26.2 142.9 -2.3 -27.6 1320 R 1 0 09 49 00 1524-136 13 13 51 26.4 143.4 -2.2 -27.2 114 1 5 0 09 49 00 10 11 00 --- 13 35 54 28.7 148.9 -1.9 -23.4 1320 F 1 17600 10 13 00 1524-136 13 37 54 28.9 149.4 -1.8 -23.0 114 1 6 17600 10 13 00 10 35 00 --- 13 59 58 30.8 155.2 -1.5 -18.8 1320 R 1 0 10 39 00 3C273 14 03 59 44.9 214.5 1.6 25.0 194 1 7 0 10 39 00 10 43 00 --- 14 07 59 44.5 215.8 1.6 25.9 240 F 1 3200 10 47 00 1524-136 14 12 00 31.7 158.4 -1.3 -16.4 196 1 7 3200 10 47 00 11 05 00 --- 14 30 03 32.8 163.4 -1.0 -12.7 1080 F 1 17600 11 07 00 1524-136 14 32 03 32.9 164.0 -0.9 -12.2 114 1 8 17600 11 07 00 11 29 00 --- 14 54 07 33.8 170.3 -0.6 -7.4 1320 R 1 0 11 31 00 1524-136 14 56 07 33.9 170.9 -0.5 -7.0 114 1 9 0 11 31 00 11 53 00 --- 15 18 11 34.3 177.3 -0.2 -2.0 1320 F 1 17600 11 55 00 1524-136 15 20 11 34.3 177.9 -0.1 -1.6 114 1 10 17600 11 55 00 12 17 00 --- 15 42 15 34.3 184.4 0.3 3.4 1320 R 1 0 Schedule for VLBA_NL (Code Nl ) 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 15 46 15 30.7 241.7 3.3 41.1 196 1 11 0 12 21 00 12 25 00 --- 15 50 16 30.0 242.5 3.3 41.5 240 F 1 3200 12 29 00 1524-136 15 54 17 34.0 187.9 0.5 6.1 198 1 11 3200 12 29 00 12 47 00 --- 16 12 20 33.4 193.1 0.8 10.1 1080 F 1 17600 ----------- Tape Change ------------ 13 04 00 1524-136 16 29 23 32.5 198.0 1.0 13.7 1011 2 1 0 13 04 00 13 26 00 --- 16 51 26 31.1 204.0 1.4 18.2 1320 F 1 17600 13 28 00 1524-136 16 53 26 30.9 204.6 1.4 18.6 114 2 2 17600 13 28 00 13 50 00 --- 17 15 30 29.0 210.4 1.8 22.8 1320 R 1 0 13 52 00 1524-136 17 17 30 28.8 210.9 1.8 23.2 114 2 3 0 13 52 00 14 14 00 --- 17 39 34 26.6 216.3 2.2 27.1 1320 F 1 17600 14 16 00 1524-136 17 41 34 26.3 216.8 2.2 27.4 114 2 4 17600 14 16 00 14 38 00 --- 18 03 38 23.7 222.0 2.6 30.9 1320 R 1 0 14 40 00 1524-136 18 05 38 23.5 222.4 2.6 31.2 114 2 5 0 14 40 00 15 02 00 --- 18 27 42 20.6 227.3 3.0 34.4 1320 F 1 17600 15 04 00 1524-136 18 29 42 20.3 227.7 3.0 34.6 114 2 6 17600 15 04 00 15 22 00 --- 18 47 45 17.7 231.5 3.3 36.9 1080 R 1 3200 15 26 00 3C273 18 51 46 -2.8 275.3 6.4 D 48.0 203 2 6 3200 15 26 00 15 30 00 --- 18 55 47 -3.6 275.9 6.4 D 47.9 0 R 1 0 15 34 00 1524-136 18 59 47 15.9 233.9 3.5 38.4 206 2 7 0 15 34 00 15 56 00 --- 19 21 51 12.5 238.2 3.9 40.7 1320 F 1 17600 15 58 00 1524-136 19 23 51 12.2 238.5 3.9 40.9 114 2 8 17600 15 58 00 16 20 00 --- 19 45 55 8.6 242.6 4.3 43.0 1320 R 1 0 16 22 00 1524-136 19 47 55 8.3 242.9 4.3 43.2 114 2 9 0 16 22 00 16 44 00 --- 20 09 59 4.6 246.8 4.7 44.9 1320 F 1 17600 16 46 00 1524-136 20 11 59 4.2 247.2 4.7 45.1 114 2 10 17600 16 46 00 17 08 00 --- 20 34 03 0.4 250.9 5.1 D 46.5 0 R 1 0 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