COVER INFORMATION Station: VLA1 (Code Y ) 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 VLA1 (Code Y ) 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: 600.39 608.39 616.39 624.39 632.39 640.39 648.39 656.39 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 08 27 00 1637+574 10 51 24 29.8 38.4 -5.8 -72.4 0 1 1 0 08 27 00 08 31 00 --- 10 55 25 30.3 38.6 -5.7 -73.1 240 F 1 3200 08 33 00 1524-136 10 57 25 10.0 114.4 -4.5 -51.0 -9 1 1 3200 08 33 00 08 51 00 --- 11 15 28 13.4 117.3 -4.2 -49.3 1071 F 1 17600 08 53 00 1524-136 11 17 28 13.8 117.6 -4.2 -49.1 104 1 2 17600 08 53 00 09 15 00 --- 11 39 32 17.7 121.3 -3.8 -46.8 1320 R 1 0 09 17 00 1524-136 11 41 32 18.1 121.7 -3.8 -46.5 104 1 3 0 09 17 00 09 39 00 --- 12 03 36 21.9 125.7 -3.4 -43.8 1320 F 1 17600 09 41 00 1524-136 12 05 36 22.2 126.1 -3.4 -43.6 104 1 4 17600 09 41 00 10 03 00 --- 12 27 40 25.8 130.4 -3.0 -40.5 1320 R 1 0 10 05 00 1524-136 12 29 40 26.1 130.9 -3.0 -40.2 104 1 5 0 10 05 00 10 27 00 --- 12 51 44 29.5 135.6 -2.6 -36.7 1320 F 1 17600 10 29 00 1642+690 12 53 44 43.2 24.5 -3.8 -107.4 -62 1 6 17600 10 29 00 10 33 00 --- 12 57 45 43.5 24.3 -3.7 -108.5 178 R 1 14400 10 35 00 1524-136 12 59 45 30.6 137.4 -2.5 -35.3 -65 1 6 14400 10 35 00 10 53 00 --- 13 17 48 33.0 141.7 -2.2 -31.9 1015 R 1 0 10 55 00 1524-136 13 19 48 33.3 142.2 -2.1 -31.5 104 1 7 0 10 55 00 11 17 00 --- 13 41 52 35.9 147.9 -1.8 -27.0 1320 F 1 17600 11 19 00 1524-136 13 43 52 36.1 148.4 -1.7 -26.5 104 1 8 17600 11 19 00 11 41 00 --- 14 05 56 38.3 154.6 -1.4 -21.5 1320 R 1 0 11 43 00 1524-136 14 07 56 38.5 155.1 -1.3 -21.0 104 1 9 0 11 43 00 12 05 00 --- 14 30 00 40.2 161.7 -1.0 -15.5 1320 F 1 17600 12 07 00 1524-136 14 32 00 40.3 162.3 -0.9 -15.0 104 1 10 17600 12 07 00 12 29 00 --- 14 54 04 41.4 169.2 -0.6 -9.2 1320 R 1 0 Schedule for VLA1 (Code Y ) 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 31 00 1642+690 14 56 04 52.1 15.1 -1.8 -143.0 -126 1 11 0 12 31 00 12 35 00 --- 15 00 05 52.3 14.7 -1.7 -144.3 114 F 1 3200 ----------- Tape Change ------------ 12 37 00 1524-136 15 02 05 41.7 171.8 -0.4 -7.0 -131 2 1 0 12 37 00 12 55 00 --- 15 20 08 42.0 177.7 -0.1 -2.0 949 F 1 14400 12 57 00 1524-136 15 22 08 42.0 178.3 -0.1 -1.4 104 2 2 17600 12 57 00 13 19 00 --- 15 44 12 41.9 185.5 0.3 4.7 1320 R 1 0 13 21 00 1524-136 15 46 12 41.8 186.2 0.3 5.3 104 2 3 0 13 21 00 13 43 00 --- 16 08 16 41.1 193.3 0.7 11.3 1320 F 1 17600 13 45 00 1524-136 16 10 16 41.0 193.9 0.7 11.8 104 2 4 17600 13 45 00 14 07 00 --- 16 32 20 39.6 200.7 1.1 17.5 1320 R 1 0 14 09 00 1524-136 16 34 20 39.5 201.3 1.1 18.0 104 2 5 0 14 09 00 14 31 00 --- 16 56 24 37.6 207.7 1.5 23.4 1320 F 1 17600 14 33 00 1642+690 16 58 24 55.1 357.4 0.3 174.1 -120 2 6 17600 14 33 00 14 37 00 --- 17 02 25 55.0 356.8 0.3 172.7 120 R 1 14400 14 39 00 1524-136 17 04 25 36.8 209.9 1.6 25.2 -115 2 6 14400 14 39 00 14 57 00 --- 17 22 28 34.8 214.7 1.9 29.1 965 R 1 0 14 59 00 1524-136 17 24 29 34.5 215.2 2.0 29.5 104 2 7 0 14 59 00 15 21 00 --- 17 46 32 31.7 220.7 2.3 33.8 1320 F 1 17600 15 23 00 1524-136 17 48 32 31.4 221.2 2.4 34.2 104 2 8 17600 15 23 00 15 45 00 --- 18 10 36 28.3 226.2 2.7 38.0 1320 R 1 0 15 47 00 1524-136 18 12 36 28.0 226.6 2.8 38.3 104 2 9 0 15 47 00 16 09 00 --- 18 34 40 24.6 231.2 3.1 41.6 1320 F 1 17600 16 11 00 1524-136 18 36 40 24.2 231.6 3.2 41.9 104 2 10 17600 16 11 00 16 33 00 --- 18 58 44 20.5 235.8 3.5 44.9 1320 R 1 0 16 35 00 1642+690 19 00 44 50.2 341.4 2.3 132.7 -53 2 11 0 16 35 00 16 39 00 --- 19 04 45 49.9 341.0 2.4 131.5 187 F 1 3200 16 41 00 1524-136 19 06 45 19.2 237.2 3.7 45.8 -51 2 11 3200 16 41 00 16 59 00 --- 19 24 48 16.0 240.4 4.0 47.9 1029 F 1 17600 Schedule for VLA1 (Code Y ) Page 4 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 --- 17 01 00 1524-136 19 26 49 15.6 240.7 4.0 48.1 104 2 12 17600 17 01 00 17 23 00 --- 19 48 52 11.6 244.3 4.4 50.2 1320 R 1 0 17 25 00 1524-136 19 50 53 11.2 244.6 4.4 50.4 104 2 13 0 17 25 00 17 47 00 --- 20 12 56 7.0 248.0 4.8 D 52.3 0 F 1 17600 17 49 00 1524-136 20 14 56 6.6 248.3 4.8 D 52.4 105 2 14 17600 17 49 00 18 11 00 --- 20 37 00 2.3 251.5 5.2 D 54.0 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/v6cm-256-8-2-L.set Matches group y_vc in /irasoft/sched/catalogs/freq.dat In VA mode, only IFs A and D are phased. ****** Only 49.61 of 64.00 MHz total bandwidth is within the IFs in the setup file before any FREQ or DOPPLER shifts. Setup group: 10 Station: VLA1 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= 4360.10 4360.10 4360.10 4360.10 4360.10 4360.10 4360.10 4360.10 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 The following frequency sets based on this setup were used. Frequency Set: 10 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= 600.39 608.39 616.39 624.39 632.39 640.39 648.39 656.39 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 VLA specific information: (LO and FI cards not needed. Defaults shown.) VLABAND: VC VLABW: 0000 FEFILTER: 0000 VLAFEAB: 0.00 VLAFECD: 0.00 VLAIF: SYSCIF VLASYNA: 3960.10 VLASYNB: 3960.10 VLAROT: VLBCROT FLUKEA: 100.00 FLUKEB: 200.00 FLUKESET: 0 Details for VLA IFs: LO Sum Frequency span VLBI FIRSTLO VLA IF A: 4960.1000 4960.1000- 5010.1000 4360.1000 VLA IF B: 4960.1000 4960.1000- 5010.1000 4360.1000 VLA IF C: 4960.1000 4960.1000- 5010.1000 4360.1000 VLA IF D: 4960.1000 4960.1000- 5010.1000 4360.1000 With new digital patch panel, VLA IF = VLB IF. 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