COVER INFORMATION Station: VLBA_NL (Code Nl ) Experiment: 43 GHz polarimetry of Cygnus A Exp. Code: BM215c Schedule Version: 1.00 Processed by SCHED version: NRAO internal release of 4 October 2004 PI: Enno Middelberg Address: Australia Telescope National Facility PO Box 76 Epping NSW 1710 Australia Phone: +61 2 9372 4100 EMAIL: enno.middelberg@csiro.au Fax: +61 2 9372 4310 Phone during observation: +61 2 9418 6968 Observing mode: 7 mm Notes: Schedule for VLBA_NL (Code Nl ) Page 2 43 GHz polarimetry of Cygnus A 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) ---------------------------------------------------------------------------------------- --- Wed 2 Feb 2005 Day 33 --- Next scan frequencies: 43201.49 43201.49 43209.49 43209.49 43217.49 43217.49 43225.49 43225.49 Next BBC frequencies: 801.49 801.49 809.49 809.49 817.49 817.49 825.49 825.49 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 14 20 58 J1751+0939 17 06 11 56.3 159.4 -0.8 -15.4 0 1 1 0 14 20 58 14 25 58 --- 17 11 11 56.7 161.6 -0.7 -13.8 299 F 1 3989 14 27 51 BLLAC 17 13 05 37.9 63.4 -4.8 -64.4 42 1 1 3989 14 27 51 14 32 51 --- 17 18 05 38.8 63.9 -4.7 -64.9 299 F 1 7978 14 36 14 J2136+0041 17 21 29 19.7 107.6 -4.3 -45.3 159 1 1 7978 14 36 14 14 41 13 --- 17 26 29 20.6 108.5 -4.2 -45.0 299 F 1 11967 14 41 13 CYG_A 17 26 29 61.4 79.1 -2.6 -75.1 -88 1 3 11967 14 41 13 15 21 07 --- 18 06 29 68.8 83.3 -1.9 -77.9 2306 F 1 8680 15 24 04 J1751+0939 18 09 26 57.6 188.2 0.3 6.2 101 1 3 8680 15 24 04 15 29 03 --- 18 14 26 57.5 190.4 0.4 7.9 299 F 1 12669 15 30 44 BLLAC 18 16 08 48.7 69.5 -3.8 -70.8 14 1 3 12669 15 30 44 15 35 43 --- 18 21 08 49.6 69.9 -3.7 -71.3 299 F 1 16658 15 38 50 J2136+0041 18 24 15 30.4 120.3 -3.2 -40.1 143 1 4 16658 15 38 50 15 43 49 --- 18 29 15 31.2 121.4 -3.1 -39.5 299 R 1 14553 15 43 49 CYG_A 18 29 15 73.0 85.9 -1.5 -79.1 -90 1 5 14553 15 43 49 16 23 43 --- 19 09 15 80.5 92.0 -0.8 -79.7 2304 F 1 17360 16 27 03 J1751+0939 19 12 36 53.3 214.7 1.3 25.5 113 1 6 17360 16 27 03 16 32 02 --- 19 17 36 52.7 216.6 1.4 26.8 299 R 1 13371 16 33 51 BLLAC 19 19 25 59.9 75.0 -2.7 -76.9 9 1 6 13371 16 33 51 16 38 50 --- 19 24 25 60.8 75.5 -2.6 -77.4 299 R 1 9382 16 41 23 J2136+0041 19 26 58 39.6 135.8 -2.2 -31.3 104 1 6 9382 16 41 23 16 46 22 --- 19 31 58 40.2 137.2 -2.1 -30.4 299 R 1 5392 16 46 22 CYG_A 19 31 58 84.7 98.9 -0.5 -76.5 -95 1 8 5392 16 46 22 17 26 15 --- 20 11 58 87.5 247.2 0.2 65.1 2299 R 1 8680 Schedule for VLBA_NL (Code Nl ) Page 3 43 GHz polarimetry of Cygnus A 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) ---------------------------------------------------------------------------------------- --- Wed 2 Feb 2005 Day 33 --- 17 28 32 J1751+0939 20 14 15 45.2 234.5 2.4 38.0 47 1 8 8680 17 28 32 17 33 32 --- 20 19 15 44.4 235.9 2.5 38.8 299 R 1 4691 17 35 34 BLLAC 20 21 18 71.2 79.8 -1.7 -83.0 12 1 8 4691 17 35 34 17 40 33 --- 20 26 18 72.1 80.2 -1.6 -83.5 299 R 1 702 17 42 15 J2136+0041 20 28 01 46.1 154.7 -1.1 -18.6 44 1 9 702 17 42 15 17 47 14 --- 20 33 01 46.5 156.5 -1.1 -17.3 299 F 1 3287 17 47 14 CYG_A 20 33 01 83.6 263.5 0.6 78.0 -80 1 10 3287 17 47 14 18 27 08 --- 21 13 01 76.2 271.9 1.2 79.7 2313 R 1 0 18 30 15 J1751+0939 21 16 09 35.0 249.5 3.4 45.1 99 1 11 0 18 30 15 18 35 14 --- 21 21 09 34.1 250.5 3.5 45.5 299 F 1 3989 18 37 27 BLLAC 21 23 21 82.6 82.6 -0.7 -90.8 14 1 11 3989 18 37 27 18 42 26 --- 21 28 21 83.6 82.4 -0.6 -91.8 299 F 1 7978 18 45 35 J2136+0041 21 31 31 48.9 178.0 -0.1 -1.5 114 1 11 7978 18 45 35 18 50 34 --- 21 36 31 48.9 179.9 0.0 -0.1 299 F 1 11967 18 50 34 CYG_A 21 36 31 71.8 274.9 1.6 78.8 -69 1 13 11967 18 50 34 19 30 27 --- 22 16 31 64.4 279.3 2.3 76.3 2324 F 1 8680 19 33 55 J1751+0939 22 19 58 23.5 261.8 4.5 48.5 119 1 13 8680 19 33 55 19 38 54 --- 22 24 58 22.5 262.7 4.6 48.6 299 F 1 12669 19 41 06 BLLAC 22 27 11 85.5 278.7 0.4 94.7 0 1 13 12669 19 41 06 19 46 05 --- 22 32 11 84.5 278.0 0.5 93.1 299 F 1 16658 19 48 45 J2136+0041 22 34 52 46.9 201.5 1.0 15.9 79 1 14 16658 19 48 45 19 53 45 --- 22 39 52 46.6 203.2 1.0 17.1 299 R 1 14553 ----------- Tape Change ------------ 19 53 45 CYG_A 22 39 52 60.1 281.6 2.7 74.6 -58 2 1 14553 19 53 45 20 33 38 --- 23 19 52 52.9 285.7 3.3 71.4 2335 F 1 17360 20 36 09 J1751+0939 23 22 23 11.9 272.4 5.5 49.1 63 2 2 17360 20 36 09 20 41 08 --- 23 27 23 10.9 273.2 5.6 49.1 299 R 1 13371 20 43 20 BLLAC 23 29 35 73.9 279.2 1.4 84.6 0 2 2 13371 20 43 20 20 48 19 --- 23 34 35 73.0 279.5 1.5 84.0 299 R 1 9382 Schedule for VLBA_NL (Code Nl ) Page 4 43 GHz polarimetry of Cygnus A 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) ---------------------------------------------------------------------------------------- --- Wed 2 Feb 2005 Day 33 --- 20 51 39 J2136+0041 23 37 56 40.7 221.7 2.0 29.7 130 2 2 9382 20 51 39 20 56 39 --- 23 42 56 40.1 223.1 2.1 30.6 299 R 1 5392 20 56 39 CYG_A 23 42 56 48.8 288.0 3.7 69.5 -49 2 4 5392 20 56 39 21 36 32 --- 00 22 56 41.8 292.1 4.4 65.8 2344 R 1 8680 21 46 42 BLLAC 00 33 07 62.3 283.9 2.5 78.2 563 2 4 8680 21 46 42 21 51 41 --- 00 38 07 61.4 284.3 2.6 77.7 299 R 1 4691 21 54 42 J2136+0041 00 41 09 31.7 237.8 3.1 39.2 115 2 4 4691 21 54 42 21 59 41 --- 00 46 09 30.9 239.0 3.2 39.7 299 R 1 702 21 59 41 CYG_A 00 46 09 37.8 294.5 4.8 63.6 -43 2 5 702 21 59 41 22 21 37 --- 01 08 09 34.1 296.9 5.1 61.4 1273 F 1 16850 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/v7mm-256-8-2.set Matches group v7mm_c8 in /home/filehost/cwalker/sched/catalogs/freq.dat Setup group: 1 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= 42400.00 42400.00 42400.00 42400.00 42400.00 42400.00 42400.00 42400.00 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 = A C A C A C A C VLBA FE= 7mm omit 7mm omit VLBA Synth= 15.4 7.6 11.6 The following frequency sets based on this setup were used. Frequency Set: 1 Setup file default. Used pcal sets: 1 LO sum= 43201.49 43201.49 43209.49 43209.49 43217.49 43217.49 43225.49 43225.49 BBC fr= 801.49 801.49 809.49 809.49 817.49 817.49 825.49 825.49 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 -- 43 GHz polarimetry of Cygnus A 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) * CYG_A 19 57 44.440998 * 19 59 28.356676 19 59 36.699848 40 35 46.36276 * 40 44 02.09658 40 44 37.80978 From catalog imbedded in main SCHED input file. ICRF - Ext.1 Source - 1998 IERS Annual Report 5.020 scan hours, 214.514 baseline hours above horizon. * J1751+0939 17 49 10.387930 * 17 51 32.818573 17 51 45.959797 09 39 42.82596 * 09 39 00.72851 09 38 41.09671 From catalog imbedded in main SCHED input file. ICRF - Ext.1 Source - 1998 IERS Annual Report 0.665 scan hours, 25.763 baseline hours above horizon. * J2136+0041 21 34 05.207365 * 21 36 38.586300 21 36 52.491033 00 28 25.08052 * 00 41 54.21335 00 43 04.49824 From catalog imbedded in main SCHED input file. ICRF - Ext.1 Source - 1998 IERS Annual Report 0.665 scan hours, 26.428 baseline hours above horizon. * BLLAC 22 00 39.362511 * 22 02 43.291378 22 02 53.469434 42 02 08.59080 * 42 16 39.97994 42 18 03.09669 From catalog imbedded in main SCHED input file. ICRF - Ext.1 Source - 1998 IERS Annual Report 0.665 scan hours, 28.422 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) CYG_A 59.4 J1751+0939 54.7 J2136+0041 18.9 BLLAC 60.4 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