COVER INFORMATION Station: VLBA_KP (Code Kp ) 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_KP (Code Kp ) 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 13 23 00 ARP220 09 38 20 12.8 70.1 -5.9 -60.5 0 1 1 0 13 23 00 13 45 00 --- 10 00 24 17.3 72.7 -5.6 -62.0 1320 F 1 17600 13 47 00 ARP220 10 02 24 17.7 72.9 -5.5 -62.1 113 1 2 17600 13 47 00 14 09 00 --- 10 24 28 22.2 75.3 -5.2 -63.5 1320 R 1 0 14 11 00 ARP220 10 26 28 22.6 75.6 -5.1 -63.6 113 1 3 0 14 11 00 14 33 00 --- 10 48 32 27.1 78.0 -4.8 -64.8 1320 F 1 17600 14 40 00 1516+193 10 55 33 30.7 84.9 -4.4 -63.7 407 1 4 17600 14 40 00 14 43 00 --- 10 58 33 31.3 85.3 -4.3 -63.8 180 R 1 15200 14 43 00 ARP220 10 58 33 29.2 79.1 -4.6 -65.3 -10 1 4 15200 14 43 00 15 02 00 --- 11 17 37 33.2 81.2 -4.3 -66.1 1130 R 1 0 15 05 00 ARP220 11 20 37 33.8 81.5 -4.2 -66.2 173 1 5 0 15 05 00 15 27 00 --- 11 42 41 38.5 84.0 -3.9 -66.9 1320 F 1 17600 15 30 00 ARP220 11 45 41 39.1 84.4 -3.8 -67.0 173 1 6 17600 15 30 00 15 52 00 --- 12 07 45 43.8 87.0 -3.5 -67.5 1320 R 1 0 15 55 00 ARP220 12 10 45 44.4 87.3 -3.4 -67.5 173 1 7 0 15 55 00 16 17 00 --- 12 32 49 49.1 90.1 -3.0 -67.7 1320 F 1 17600 16 20 00 1516+193 12 35 49 51.9 99.0 -2.7 -62.8 168 1 8 17600 16 20 00 16 26 00 --- 12 41 50 53.1 100.1 -2.6 -62.4 360 R 1 12800 16 26 00 ARP220 12 41 50 51.0 91.4 -2.9 -67.7 -12 1 8 12800 16 26 00 16 42 00 --- 12 57 53 54.4 93.7 -2.6 -67.4 948 R 1 0 16 45 00 ARP220 13 00 54 55.0 94.1 -2.6 -67.3 173 1 9 0 16 45 00 17 07 00 --- 13 22 57 59.7 97.8 -2.2 -66.4 1320 F 1 17600 17 10 00 ARP220 13 25 58 60.3 98.4 -2.2 -66.2 173 1 10 17600 17 10 00 17 32 00 --- 13 48 01 64.9 103.0 -1.8 -64.4 1320 R 1 0 Schedule for VLBA_KP (Code Kp ) 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 --- 17 35 00 1613+341 13 51 02 60.2 75.9 -2.4 -84.2 156 1 11 0 17 35 00 17 38 00 --- 13 54 02 60.8 76.0 -2.3 -84.5 180 F 1 2400 17 38 00 ARP220 13 54 02 66.2 104.4 -1.7 -63.6 -25 1 11 2400 17 38 00 17 57 00 --- 14 13 05 70.0 109.9 -1.4 -60.4 1115 F 1 17600 18 00 00 ARP220 14 16 06 70.6 111.0 -1.3 -59.8 173 1 12 17600 18 00 00 18 22 00 --- 14 38 09 74.9 120.4 -0.9 -52.9 1320 R 1 0 18 40 00 1613+341 14 56 12 73.6 76.9 -1.3 -92.5 1045 1 13 0 18 40 00 18 43 00 --- 14 59 13 74.2 76.7 -1.2 -93.0 180 F 1 2400 18 43 00 ARP220 14 59 13 78.4 134.7 -0.6 -41.1 -45 1 13 2400 18 43 00 19 02 00 --- 15 18 16 80.8 155.3 -0.3 -22.7 1095 F 1 17600 19 05 00 ARP220 15 21 17 81.0 159.4 -0.2 -19.0 171 1 14 17600 19 05 00 19 27 00 --- 15 43 20 81.3 192.7 0.1 11.8 1320 R 1 0 ----------- Tape Change ------------ 19 30 00 ARP220 15 46 21 81.2 197.1 0.2 15.8 171 2 1 0 19 30 00 19 52 00 --- 16 08 24 78.8 223.1 0.6 39.2 1320 F 1 17600 19 55 00 ARP220 16 11 25 78.3 225.8 0.6 41.5 172 2 2 17600 19 55 00 20 17 00 --- 16 33 28 74.6 240.4 1.0 53.5 1320 R 1 0 20 20 00 1613+341 16 36 29 84.7 296.8 0.4 113.7 136 2 3 0 20 20 00 20 23 00 --- 16 39 29 84.2 294.4 0.4 110.9 180 F 1 2400 20 23 00 ARP220 16 39 29 73.4 243.3 1.1 55.7 -40 2 3 2400 20 23 00 20 42 00 --- 16 58 32 69.7 250.6 1.4 60.7 1100 F 1 17600 20 45 00 ARP220 17 01 33 69.1 251.5 1.4 61.3 173 2 4 17600 20 45 00 21 07 00 --- 17 23 37 64.6 257.4 1.8 64.5 1320 R 1 0 21 10 00 ARP220 17 26 37 64.0 258.1 1.9 64.8 173 2 5 0 21 10 00 21 32 00 --- 17 48 41 59.4 262.4 2.2 66.5 1320 F 1 17600 21 35 00 ARP220 17 51 41 58.7 263.0 2.3 66.7 173 2 6 17600 21 35 00 21 57 00 --- 18 13 45 54.1 266.5 2.6 67.4 1320 R 1 0 22 00 00 1613+341 18 16 45 64.2 283.4 2.1 86.3 154 2 7 0 22 00 00 22 06 00 --- 18 22 46 63.0 283.6 2.2 85.7 360 F 1 4800 Schedule for VLBA_KP (Code Kp ) Page 4 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 --- 22 06 00 ARP220 18 22 46 52.2 267.9 2.8 67.6 -28 2 7 4800 22 06 00 22 22 00 --- 18 38 49 48.8 270.1 3.1 67.7 932 F 1 17600 22 25 00 ARP220 18 41 49 48.1 270.5 3.1 67.7 173 2 8 17600 22 25 00 22 47 00 --- 19 03 53 43.5 273.2 3.5 67.5 1320 R 1 0 22 50 00 ARP220 19 06 53 42.8 273.6 3.5 67.4 173 2 9 0 22 50 00 23 12 00 --- 19 28 57 38.2 276.2 3.9 66.9 1320 F 1 17600 23 15 00 ARP220 19 31 58 37.5 276.5 3.9 66.8 173 2 10 17600 23 15 00 23 37 00 --- 19 54 01 32.9 279.0 4.3 66.0 1320 R 1 0 23 40 00 1613+341 19 57 02 43.8 288.7 3.7 76.4 152 2 11 0 23 40 00 23 43 00 --- 20 00 02 43.2 288.9 3.8 76.1 180 F 1 2400 23 43 00 ARP220 20 00 02 31.6 279.7 4.4 65.8 -29 2 11 2400 23 43 00 23 58 00 --- 20 15 05 28.5 281.3 4.7 65.1 871 F 1 14400 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