COVER INFORMATION Station: VLBA_HN (Code Hn ) Experiment: Helical structure in B1524-136 jets Exp. Code: gm052b Schedule Version: 1.00 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) ---------------------------------------------------------------------------------------- --- Sat 14 Feb 2004 Day 45 --- Next scan frequencies: 4960.49 4968.49 4976.49 4984.49 4992.49 5000.49 5008.49 5016.49 Next BBC frequencies: 860.49 868.49 876.49 884.49 892.49 900.49 908.49 916.49 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 08 03 00 1524-136 12 49 51 22.7 138.1 -2.6 -30.2 0 1 1 0 08 03 00 08 25 00 --- 13 11 54 25.3 143.3 -2.3 -26.8 1320 F 1 17600 08 27 00 1637+574 13 13 55 55.2 47.5 -3.4 -91.9 50 1 2 17600 08 27 00 08 31 00 --- 13 17 55 55.8 47.4 -3.3 -92.8 240 R 1 14400 08 33 00 1524-136 13 19 56 26.2 145.2 -2.1 -25.5 49 1 2 14400 08 33 00 08 51 00 --- 13 37 59 27.9 149.7 -1.8 -22.3 1080 R 1 0 08 53 00 1524-136 13 39 59 28.1 150.2 -1.8 -22.0 114 1 3 0 08 53 00 09 15 00 --- 14 02 02 29.9 156.0 -1.4 -17.9 1320 F 1 17600 09 17 00 1524-136 14 04 03 30.1 156.5 -1.4 -17.5 114 1 4 17600 09 17 00 09 39 00 --- 14 26 06 31.5 162.5 -1.0 -13.1 1320 R 1 0 09 41 00 1524-136 14 28 07 31.6 163.1 -1.0 -12.7 114 1 5 0 09 41 00 10 03 00 --- 14 50 10 32.6 169.3 -0.6 -8.0 1320 F 1 17600 10 05 00 1524-136 14 52 11 32.6 169.9 -0.6 -7.6 114 1 6 17600 10 05 00 10 27 00 --- 15 14 14 33.1 176.2 -0.2 -2.8 1320 R 1 0 10 29 00 1642+690 15 16 15 61.7 16.1 -1.4 -145.6 7 1 7 0 10 29 00 10 33 00 --- 15 20 15 61.9 15.5 -1.4 -147.1 240 F 1 3200 10 35 00 1524-136 15 22 16 33.2 178.6 -0.1 -1.1 5 1 7 3200 10 35 00 10 53 00 --- 15 40 19 33.1 183.8 0.2 2.9 1080 F 1 17600 10 55 00 1524-136 15 42 19 33.1 184.4 0.3 3.3 114 1 8 17600 10 55 00 11 17 00 --- 16 04 23 32.6 190.7 0.6 8.1 1320 R 1 0 11 19 00 1524-136 16 06 23 32.5 191.3 0.7 8.5 114 1 9 0 11 19 00 11 41 00 --- 16 28 26 31.5 197.5 1.0 13.1 1320 F 1 17600 11 43 00 1524-136 16 30 27 31.4 198.0 1.1 13.5 114 1 10 17600 11 43 00 12 05 00 --- 16 52 30 29.9 204.0 1.4 17.9 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) ---------------------------------------------------------------------------------------- --- Sat 14 Feb 2004 Day 45 --- 12 07 00 1524-136 16 54 31 29.8 204.6 1.5 18.3 114 1 11 0 12 07 00 12 29 00 --- 17 16 34 27.9 210.3 1.8 22.4 1320 F 1 17600 12 31 00 1642+690 17 18 35 63.6 352.6 0.6 164.9 19 1 12 17600 12 31 00 12 35 00 --- 17 22 35 63.5 351.9 0.7 163.3 240 R 1 14400 ----------- Tape Change ------------ 12 37 00 1524-136 17 24 36 27.2 212.3 2.0 23.8 21 2 1 0 12 37 00 12 55 00 --- 17 42 39 25.3 216.7 2.3 26.8 1080 F 1 14400 12 57 00 1524-136 17 44 39 25.1 217.2 2.3 27.1 114 2 2 17600 12 57 00 13 19 00 --- 18 06 43 22.5 222.3 2.7 30.5 1320 R 1 0 13 21 00 1524-136 18 08 43 22.2 222.8 2.7 30.8 114 2 3 0 13 21 00 13 43 00 --- 18 30 47 19.4 227.6 3.1 33.9 1320 F 1 17600 13 45 00 1524-136 18 32 47 19.1 228.1 3.1 34.1 114 2 4 17600 13 45 00 14 07 00 --- 18 54 50 16.0 232.6 3.5 36.8 1320 R 1 0 14 09 00 1524-136 18 56 51 15.7 233.0 3.5 37.1 114 2 5 0 14 09 00 14 31 00 --- 19 18 54 12.4 237.4 3.9 39.4 1320 F 1 17600 14 33 00 1642+690 19 20 55 56.9 335.1 2.6 121.0 25 2 6 17600 14 33 00 14 37 00 --- 19 24 55 56.6 334.8 2.7 119.8 240 R 1 14400 14 39 00 1524-136 19 26 56 11.1 238.9 4.0 40.2 23 2 6 14400 14 39 00 14 57 00 --- 19 44 59 8.2 242.3 4.3 41.9 1080 R 1 0 14 59 00 1524-136 19 46 59 7.9 242.6 4.3 42.0 114 2 7 0 14 59 00 15 21 00 --- 20 09 03 4.3 246.6 4.7 H 43.8 0 F 1 17600 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/v6cm-256-8-2-L.set Matches group v6cm_2 in /irasoft/sched/catalogs/freq.dat Setup group: 9 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= 4100.00 4100.00 4100.00 4100.00 4100.00 4100.00 4100.00 4100.00 Net SB= U U U U U U U U Pol. = LCP LCP LCP LCP LCP LCP LCP LCP BBC = 1 2 3 4 5 6 7 8 BBC SB= U U U U U U U U IF = C C C C C C C C VLBA FE= 6cm omit 6cm omit VLBA Synth= 15.4 4.1 15.4 The following frequency sets based on this setup were used. Frequency Set: 9 Setup file default. Used pcal sets: 1 LO sum= 4960.49 4968.49 4976.49 4984.49 4992.49 5000.49 5008.49 5016.49 BBC fr= 860.49 868.49 876.49 884.49 892.49 900.49 908.49 916.49 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 19.603680 02 19 43.30550 * 02 03 08.59800 02 01 43.01229 From catalog imbedded in main SCHED input file. * OQ208 14 04 45.615152 * 14 07 00.394411 14 07 11.612080 28 41 29.23491 * 28 27 14.68994 28 25 50.05163 From catalog imbedded in main SCHED input file. * 1524-136 15 24 12.880517 * 15 26 59.450000 15 27 12.385859 -13 40 34.86530 *-13 51 00.10000 -13 51 55.45989 From catalog imbedded in main SCHED input file. J1638+5720 16 37 17.425178 * 16 38 13.456293 16 38 17.324466 * 1637+574 57 26 15.76147 * 57 20 23.97918 57 19 31.14683 J1638+57 /irasoft/sched/catalogs/sources.vlba ICRF - Ext.1 Source - 1998 IERS Annual Report J1642+3948 16 41 17.606214 * 16 42 58.809952 16 43 06.266114 1641+399 39 54 10.81489 * 39 48 36.99395 39 47 47.97809 * 3C345 /irasoft/sched/catalogs/sources.vlba J1642+39 ICRF - Ext.1 Source - 1998 IERS Annual Report J1642+6856 16 42 18.064884 * 16 42 07.848514 16 42 06.279838 * 1642+690 69 02 13.21712 * 68 56 39.75640 68 55 47.71872 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 138.9 OQ208 118.5 1524-136 92.1 1637+574 94.6 3C345 88.4 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