COVER INFORMATION Station: VLBA_MK (Code Mk ) 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_MK (Code Mk ) 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 12 50 39 17.0 85.6 -5.0 -72.1 0 1 1 0 14 20 58 14 25 58 --- 12 55 39 18.2 86.0 -4.9 -72.2 299 F 1 3989 14 41 13 CYG_A 13 10 57 4.1 47.9 -6.8 -67.2 881 1 3 3989 14 41 13 15 21 07 --- 13 50 57 11.2 50.5 -6.1 -73.4 2393 F 1 702 15 24 04 J1751+0939 13 53 55 31.9 90.8 -4.0 -72.6 130 1 3 702 15 24 04 15 29 03 --- 13 58 55 33.1 91.3 -3.9 -72.6 299 F 1 4691 15 43 49 CYG_A 14 13 44 15.4 51.6 -5.8 -76.9 845 1 5 4691 15 43 49 16 23 43 --- 14 53 44 22.8 53.1 -5.1 -83.0 2393 F 1 1403 16 27 03 J1751+0939 14 57 05 46.7 97.0 -2.9 -71.3 147 1 5 1403 16 27 03 16 32 02 --- 15 02 05 47.9 97.6 -2.8 -71.1 299 F 1 5392 16 33 51 BLLAC 15 03 54 2.9 45.7 -7.0 -65.7 13 1 5 5392 16 33 51 16 38 50 --- 15 08 54 3.8 46.1 -6.9 -66.5 299 F 1 9382 16 46 22 CYG_A 15 16 26 27.1 53.5 -4.7 -86.5 399 1 7 9382 16 46 22 17 26 15 --- 15 56 26 34.7 53.5 -4.1 -93.0 2393 F 1 6094 17 28 32 J1751+0939 15 58 44 60.9 106.3 -1.9 -66.3 79 1 7 6094 17 28 32 17 33 32 --- 16 03 44 62.0 107.4 -1.8 -65.6 299 F 1 10083 17 35 34 BLLAC 16 05 47 13.7 49.6 -6.0 -75.5 20 1 7 10083 17 35 34 17 40 33 --- 16 10 47 14.6 49.8 -5.9 -76.3 299 F 1 14072 17 42 15 J2136+0041 16 12 29 8.6 92.4 -5.4 -70.1 68 1 8 14072 17 42 15 17 47 14 --- 16 17 29 9.8 92.8 -5.3 -70.0 299 R 1 17139 17 47 14 CYG_A 16 17 29 38.6 53.1 -3.7 -96.7 -64 1 9 17139 17 47 14 18 27 08 --- 16 57 29 46.1 51.2 -3.0 -104.5 2330 F 1 14774 18 30 15 J1751+0939 17 00 37 74.0 127.6 -0.9 -49.1 126 1 10 14774 18 30 15 18 35 14 --- 17 05 37 74.9 130.7 -0.8 -46.3 299 R 1 16437 Schedule for VLBA_MK (Code Mk ) 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 --- 18 37 27 BLLAC 17 07 50 25.0 51.6 -4.9 -85.3 26 1 10 16437 18 37 27 18 42 26 --- 17 12 50 25.9 51.7 -4.8 -86.2 299 R 1 12448 18 45 35 J2136+0041 17 15 59 23.5 98.2 -4.3 -68.7 152 1 10 12448 18 45 35 18 50 34 --- 17 20 59 24.6 98.7 -4.3 -68.5 299 R 1 8459 18 50 34 CYG_A 17 20 59 50.3 49.3 -2.6 -109.8 -57 1 12 8459 18 50 34 19 30 27 --- 18 00 59 57.2 43.8 -2.0 -120.8 2336 R 1 11746 19 33 55 J1751+0939 18 04 27 79.4 197.2 0.2 16.4 99 1 12 11746 19 33 55 19 38 54 --- 18 09 27 79.0 203.4 0.3 22.3 299 R 1 7757 19 41 06 BLLAC 18 11 39 36.8 51.4 -3.9 -96.2 25 1 12 7757 19 41 06 19 46 05 --- 18 16 39 37.7 51.3 -3.8 -97.1 299 R 1 3768 19 48 45 J2136+0041 18 19 20 38.1 105.4 -3.3 -65.1 118 1 13 3768 19 48 45 19 53 45 --- 18 24 20 39.2 106.1 -3.2 -64.7 299 F 1 221 19 53 45 CYG_A 18 24 20 60.8 38.9 -1.6 -128.8 -51 1 14 221 19 53 45 20 33 38 --- 19 04 20 66.0 26.4 -0.9 -146.5 2343 R 1 3066 ----------- Tape Change ------------ 20 36 09 J1751+0939 19 06 51 69.2 243.4 1.3 58.6 0 2 1 3066 20 36 09 20 41 08 --- 19 11 51 68.2 245.2 1.3 60.0 299 F 1 923 20 43 20 BLLAC 19 14 04 48.0 408.0 -2.8 -109.1 17 2 1 923 20 43 20 20 48 19 --- 19 19 04 48.9 407.5 -2.7 -110.3 299 F 1 4912 20 51 39 J2136+0041 19 22 24 52.0 116.0 -2.2 -57.7 0 2 1 4912 20 51 39 20 56 39 --- 19 27 24 53.0 117.1 -2.2 -56.9 299 F 1 8901 20 56 39 CYG_A 19 27 24 68.0 16.4 -0.5 -159.4 -73 2 3 8901 20 56 39 21 36 32 --- 20 07 24 69.0 -4.1 0.1 174.9 2320 F 1 5614 21 39 33 J1751+0939 20 10 26 55.1 258.2 2.3 69.1 0 2 3 5614 21 39 33 21 44 32 --- 20 15 26 53.9 259.0 2.4 69.5 299 F 1 9603 21 46 42 BLLAC 20 17 36 58.4 398.7 -1.8 -127.2 30 2 3 9603 21 46 42 21 51 41 --- 20 22 36 59.1 397.6 -1.7 -129.0 299 F 1 13592 21 54 42 J2136+0041 20 25 37 64.1 135.4 -1.2 -41.3 0 2 3 13592 21 54 42 21 59 41 --- 20 30 37 65.0 137.7 -1.1 -39.3 299 F 1 17581 Schedule for VLBA_MK (Code Mk ) 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 --- 21 59 41 CYG_A 20 30 37 68.0 -15.9 0.5 160.2 -108 2 4 17581 21 59 41 22 21 37 --- 20 52 37 66.2 -25.5 0.9 147.7 1208 R 1 29 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