COVER INFORMATION Station: VLBA_OV (Code Ov ) 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_OV (Code Ov ) 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 15 19 22 46.0 118.9 -2.5 -45.0 0 1 1 0 14 20 58 14 25 58 --- 15 24 22 46.8 120.2 -2.5 -44.3 299 F 1 3989 14 27 51 BLLAC 15 26 16 18.3 50.3 -6.6 -55.9 51 1 1 3989 14 27 51 14 32 51 --- 15 31 16 19.0 50.8 -6.5 -56.5 299 F 1 7978 14 41 13 CYG_A 15 39 40 40.5 64.6 -4.3 -71.7 453 1 3 7978 14 41 13 15 21 07 --- 16 19 40 47.8 67.5 -3.7 -76.2 2393 F 1 4691 15 24 04 J1751+0939 16 22 38 55.9 138.2 -1.5 -32.5 124 1 3 4691 15 24 04 15 29 03 --- 16 27 38 56.5 140.1 -1.4 -31.2 299 F 1 8680 15 30 44 BLLAC 16 29 19 28.4 56.6 -5.6 -64.0 39 1 3 8680 15 30 44 15 35 43 --- 16 34 19 29.2 57.1 -5.5 -64.6 299 F 1 12669 15 38 50 J2136+0041 16 37 27 12.4 98.7 -5.0 -51.9 147 1 3 12669 15 38 50 15 43 49 --- 16 42 27 13.4 99.5 -4.9 -51.7 299 F 1 16658 15 43 49 CYG_A 16 42 27 52.0 69.0 -3.3 -78.8 -83 1 5 16658 15 43 49 16 23 43 --- 17 22 27 59.5 71.0 -2.6 -83.6 2310 F 1 13371 16 27 03 J1751+0939 17 25 48 61.8 166.4 -0.4 -11.0 131 1 5 13371 16 27 03 16 32 02 --- 17 30 48 62.0 168.9 -0.3 -8.9 299 F 1 17360 16 33 51 BLLAC 17 32 37 39.2 61.9 -4.5 -71.7 32 1 6 17360 16 33 51 16 38 50 --- 17 37 37 40.1 62.3 -4.4 -72.3 299 R 1 13371 16 41 23 J2136+0041 17 40 09 24.5 109.3 -3.9 -48.7 115 1 6 13371 16 41 23 16 46 22 --- 17 45 09 25.5 110.2 -3.9 -48.4 299 R 1 9382 16 46 22 CYG_A 17 45 09 63.8 71.8 -2.2 -86.7 -83 1 8 9382 16 46 22 17 26 15 --- 18 25 09 71.4 71.8 -1.6 -93.2 2311 R 1 12669 17 28 32 J1751+0939 18 27 27 61.3 198.5 0.6 14.9 47 1 8 12669 17 28 32 17 33 32 --- 18 32 27 60.9 201.0 0.7 16.8 299 R 1 8680 Schedule for VLBA_OV (Code Ov ) 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 35 34 BLLAC 18 34 29 50.3 65.9 -3.5 -79.3 26 1 8 8680 17 35 34 17 40 33 --- 18 39 29 51.2 66.2 -3.4 -80.0 299 R 1 4691 17 42 15 J2136+0041 18 41 12 35.5 121.5 -2.9 -42.7 59 1 8 4691 17 42 15 17 47 14 --- 18 46 12 36.4 122.7 -2.8 -42.1 299 R 1 702 17 47 14 CYG_A 18 46 12 75.3 70.5 -1.2 -97.9 -84 1 10 702 17 47 14 18 27 08 --- 19 26 12 82.6 59.0 -0.6 -115.7 2310 R 1 3989 18 30 15 J1751+0939 19 29 20 54.7 224.8 1.6 34.7 71 1 10 3989 18 30 15 18 35 14 --- 19 34 20 54.0 226.5 1.7 35.9 299 R 1 0 18 37 27 BLLAC 19 36 32 61.6 68.2 -2.4 -87.9 21 1 11 0 18 37 27 18 42 26 --- 19 41 32 62.6 68.2 -2.4 -88.7 299 F 1 3989 18 45 35 J2136+0041 19 44 42 45.3 138.1 -1.9 -32.1 136 1 11 3989 18 45 35 18 50 34 --- 19 49 42 45.9 139.6 -1.8 -31.1 299 F 1 7978 18 50 34 CYG_A 19 49 42 86.0 28.0 -0.2 -150.5 -86 1 13 7978 18 50 34 19 30 27 --- 20 29 42 83.2 -56.7 0.5 118.6 2307 F 1 4691 19 33 55 J1751+0939 20 33 10 44.4 243.3 2.7 46.2 1 1 13 4691 19 33 55 19 38 54 --- 20 38 10 43.5 244.5 2.8 46.8 299 F 1 8680 19 41 06 BLLAC 20 40 22 73.4 65.8 -1.4 -100.9 7 1 13 8680 19 41 06 19 46 05 --- 20 45 22 74.3 65.1 -1.3 -102.4 299 F 1 12669 19 48 45 J2136+0041 20 48 03 51.8 160.0 -0.8 -15.8 91 1 13 12669 19 48 45 19 53 45 --- 20 53 03 52.1 162.0 -0.7 -14.3 299 F 1 16658 ----------- Tape Change ------------ 19 53 45 CYG_A 20 53 03 79.1 292.8 0.9 104.4 -93 2 1 16658 19 53 45 20 33 38 --- 21 33 03 71.6 288.2 1.6 93.4 2300 F 1 13371 20 36 09 J1751+0939 21 35 34 32.7 256.2 3.7 51.7 67 2 1 13371 20 36 09 20 41 08 --- 21 40 34 31.8 257.1 3.8 51.9 299 F 1 17360 20 43 20 BLLAC 21 42 46 83.6 395.7 -0.3 -141.0 22 2 2 17360 20 43 20 20 48 19 --- 21 47 46 84.2 388.6 -0.3 -149.0 299 R 1 13371 20 51 39 J2136+0041 21 51 07 53.3 186.0 0.2 4.8 59 2 2 13371 20 51 39 20 56 39 --- 21 56 07 53.2 188.1 0.3 6.4 299 R 1 9382 Schedule for VLBA_OV (Code Ov ) 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 56 39 CYG_A 21 56 07 67.2 287.9 1.9 89.3 -73 2 4 9382 20 56 39 21 36 32 --- 22 36 07 59.6 288.9 2.6 83.7 2321 R 1 12669 21 39 33 J1751+0939 22 39 09 20.2 266.8 4.8 53.7 96 2 4 12669 21 39 33 21 44 32 --- 22 44 09 19.2 267.6 4.9 53.8 299 R 1 8680 21 46 42 BLLAC 22 46 19 80.2 304.7 0.7 117.7 2 2 4 8680 21 46 42 21 51 41 --- 22 51 19 79.4 302.4 0.8 114.6 299 R 1 4691 21 54 42 J2136+0041 22 54 20 49.3 210.6 1.3 23.9 114 2 4 4691 21 54 42 21 59 41 --- 22 59 20 48.8 212.3 1.4 25.2 299 R 1 702 21 59 41 CYG_A 22 59 20 55.3 290.0 3.0 80.9 -58 2 5 702 21 59 41 22 21 37 --- 23 21 20 51.2 291.3 3.4 78.3 1259 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