COVER INFORMATION Station: VLBA_MK (Code Mk ) Experiment: GL026B VLBA format, 18 cm, Arp 220, Colin Lonsdale, November 2002 Exp. Code: GL026B Schedule Version: 1.00 Processed by SCHED version: Release of 02 July 2002 PI: Colin Lonsdale Address: MIT Haystack Observatory Off Route 40 Westford, MA 01886 Phone: 508-692-4764 (work) or 603-672-1268 (home) EMAIL: cjl@dopey.haystack.edu Fax: 617-981-0590 Phone during observation: 508-692-4764 (work) or 603-672-1268 (home) Observing mode: 256-8-2 Notes: Primary fringe finder 1613+341 Schedule for VLBA_MK (Code Mk ) Page 2 GL026B VLBA format, 18 cm, Arp 220, Colin Lonsdale, November 2002 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) ---------------------------------------------------------------------------------------- --- Sat 16 Nov 2002 Day 320 --- Next scan frequencies: 1632.99 1632.99 1640.99 1640.99 1648.99 1648.99 1656.99 1656.99 Next BBC frequencies: 767.01 767.01 759.01 759.01 751.01 751.01 743.01 743.01 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 15 30 00 ARP220 08 50 19 -1.8 64.2 -6.7 D -67.4 0 1 1 0 15 30 00 15 52 00 --- 09 12 22 2.9 66.0 -6.4 -69.6 0 F 1 17600 15 55 00 ARP220 09 15 23 3.5 66.3 -6.3 -69.9 173 1 2 17600 15 55 00 16 17 00 --- 09 37 27 8.3 67.9 -6.0 -71.9 1320 R 1 0 16 20 00 1516+193 09 40 27 11.8 73.3 -5.6 -72.9 167 1 3 0 16 20 00 16 26 00 --- 09 46 28 13.1 73.7 -5.5 -73.4 360 F 1 4800 16 26 00 ARP220 09 46 28 10.3 68.6 -5.8 -72.7 -12 1 3 4800 16 26 00 16 42 00 --- 10 02 31 13.8 69.6 -5.5 -74.1 948 F 1 17600 16 45 00 ARP220 10 05 31 14.4 69.8 -5.5 -74.4 173 1 4 17600 16 45 00 17 07 00 --- 10 27 35 19.3 71.2 -5.1 -76.2 1320 R 1 0 17 10 00 ARP220 10 30 35 20.0 71.3 -5.1 -76.4 173 1 5 0 17 10 00 17 32 00 --- 10 52 39 24.9 72.6 -4.7 -78.2 1320 F 1 17600 17 35 00 1613+341 10 55 39 19.4 59.6 -5.3 -78.8 163 1 6 17600 17 35 00 17 38 00 --- 10 58 40 20.0 59.7 -5.3 -79.1 180 R 1 15200 17 38 00 ARP220 10 58 40 26.3 72.9 -4.6 -78.6 -19 1 6 15200 17 38 00 17 57 00 --- 11 17 43 30.6 73.8 -4.3 -80.1 1121 R 1 0 18 00 00 ARP220 11 20 44 31.3 73.9 -4.2 -80.3 173 1 7 0 18 00 00 18 22 00 --- 11 42 47 36.3 74.8 -3.9 -82.0 1320 F 1 17600 18 40 00 1613+341 12 00 50 32.7 61.4 -4.2 -87.1 1065 1 8 17600 18 40 00 18 43 00 --- 12 03 51 33.4 61.4 -4.2 -87.5 180 R 1 15200 18 43 00 ARP220 12 03 51 41.1 75.6 -3.5 -83.6 -21 1 8 15200 18 43 00 19 02 00 --- 12 22 54 45.4 76.2 -3.2 -85.1 1119 R 1 0 19 05 00 ARP220 12 25 54 46.1 76.3 -3.2 -85.4 173 1 9 0 19 05 00 19 27 00 --- 12 47 58 51.1 76.8 -2.8 -87.2 1320 F 1 17600 Schedule for VLBA_MK (Code Mk ) Page 3 GL026B VLBA format, 18 cm, Arp 220, Colin Lonsdale, November 2002 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) ---------------------------------------------------------------------------------------- --- Sat 16 Nov 2002 Day 320 --- 19 30 00 ARP220 12 50 58 51.8 76.8 -2.7 -87.4 173 1 10 17600 19 30 00 19 52 00 --- 13 13 02 56.9 77.1 -2.4 -89.4 1320 R 1 0 19 55 00 ARP220 13 16 02 57.6 77.1 -2.3 -89.7 173 1 11 0 19 55 00 20 17 00 --- 13 38 06 62.6 76.9 -1.9 -92.1 1320 F 1 17600 20 20 00 1613+341 13 41 07 53.3 58.9 -2.5 -103.1 155 1 12 17600 20 20 00 20 23 00 --- 13 44 07 54.0 58.6 -2.5 -103.8 180 R 1 15200 20 23 00 ARP220 13 44 07 64.0 76.8 -1.8 -92.8 -26 1 12 15200 20 23 00 20 42 00 --- 14 03 10 68.4 76.0 -1.5 -95.4 1114 R 1 0 20 45 00 ARP220 14 06 11 69.0 75.8 -1.5 -95.9 173 1 13 0 20 45 00 21 07 00 --- 14 28 14 74.1 73.6 -1.1 -100.2 1320 F 1 17600 21 10 00 ARP220 14 31 15 74.7 73.1 -1.1 -100.9 173 1 14 17600 21 10 00 21 32 00 --- 14 53 18 79.6 67.3 -0.7 -108.9 1320 R 1 0 ----------- Tape Change ------------ 21 35 00 ARP220 14 56 19 80.3 65.9 -0.6 -110.5 173 2 1 0 21 35 00 21 57 00 --- 15 18 22 84.6 45.6 -0.3 -132.9 1320 F 1 17600 22 00 00 1613+341 15 21 23 71.5 36.2 -0.9 -137.8 148 2 2 17600 22 00 00 22 06 00 --- 15 27 24 72.3 33.1 -0.8 -141.5 360 R 1 12800 22 06 00 ARP220 15 27 24 85.9 25.3 -0.1 -154.0 -33 2 2 12800 22 06 00 22 22 00 --- 15 43 27 85.8 -27.5 0.1 151.7 927 R 1 0 22 25 00 ARP220 15 46 27 85.5 -35.2 0.2 143.8 169 2 3 0 22 25 00 22 47 00 --- 16 08 31 81.4 -63.1 0.6 113.8 1320 F 1 17600 22 50 00 ARP220 16 11 31 80.8 -64.8 0.6 111.8 173 2 4 17600 22 50 00 23 12 00 --- 16 33 35 75.9 -72.2 1.0 102.4 1320 R 1 0 23 15 00 ARP220 16 36 35 75.2 -72.7 1.0 101.5 173 2 5 0 23 15 00 23 37 00 --- 16 58 39 70.2 -75.5 1.4 96.8 1320 F 1 17600 23 40 00 1613+341 17 01 39 72.1 -33.9 0.8 140.6 146 2 6 17600 23 40 00 23 43 00 --- 17 04 40 71.7 -35.5 0.8 138.7 180 R 1 15200 23 43 00 ARP220 17 04 40 68.9 -75.9 1.5 95.7 -33 2 6 15200 23 43 00 23 58 00 --- 17 19 42 65.4 -76.6 1.7 93.6 867 R 1 3200 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: arp220.set Matches group v20cm_2 in /usr/local/vlbi_sched/catalogs/freq.dat FD filtered above 1760. SC filtered above 1740. Setup group: 7 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= 2400.00 2400.00 2400.00 2400.00 2400.00 2400.00 2400.00 2400.00 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= L L L L L L L L IF = A C A C A C A C VLBA FE= 20cm omit 20cm omit VLBA Synth= 15.4 2.4 15.4 The following frequency sets based on this setup were used. Frequency Set: 7 Setup file default. Used pcal sets: 1 LO sum= 1632.99 1632.99 1640.99 1640.99 1648.99 1648.99 1656.99 1656.99 BBC fr= 767.01 767.01 759.01 759.01 751.01 751.01 743.01 743.01 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= 10 10 10 10 6010 6010 6010 6010 PCALFR2= 10 10 10 10 6010 6010 6010 6010 Track assignments are: track1= 2, 10, 18, 26, 3, 11, 19, 27 barrel=roll_auto SOURCE LIST -- GL026B VLBA format, 18 cm, Arp 220, Colin Lonsdale, November 2002 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) * ARP220 15 32 46.880196 * 15 34 57.224670 15 35 02.406600 23 40 07.99276 * 23 30 11.56400 23 29 43.00602 From catalog imbedded in main SCHED input file. * 1516+193 15 14 40.987286 * 15 16 56.797600 15 17 02.300133 19 43 10.96935 * 19 32 13.01900 19 31 41.16431 From catalog imbedded in main SCHED input file. * 1613+341 16 11 47.914510 * 16 13 41.064500 16 13 45.236673 34 20 19.83496 * 34 12 47.91000 34 12 27.67864 From catalog imbedded in main SCHED input file. * 3C286 13 28 49.657708 * 13 31 08.288000 13 31 14.112421 30 45 58.64136 * 30 30 32.96000 30 29 43.43295 From catalog imbedded in main SCHED input file. 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) ARP220 42.3 1516+193 38.4 1613+341 54.2 3C286 56.6 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