COVER INFORMATION Station: VLBA_FD (Code Fd ) 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_FD (Code Fd ) 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 12 30 00 1613+341 09 15 52 6.2 53.7 -7.0 -56.9 0 1 1 0 12 30 00 12 36 00 --- 09 21 53 7.3 54.3 -6.9 -57.7 360 F 1 4800 12 36 00 ARP220 09 21 53 9.1 68.0 -6.2 -60.4 -15 1 1 4800 12 36 00 12 52 00 --- 09 37 55 12.3 69.8 -6.0 -61.7 945 F 1 17600 13 00 00 1613+341 09 45 57 11.6 56.9 -6.5 -60.7 465 1 2 17600 13 00 00 13 03 00 --- 09 48 57 12.1 57.2 -6.4 -61.0 180 R 1 15200 13 03 00 ARP220 09 48 57 14.5 71.0 -5.8 -62.5 -15 1 2 15200 13 03 00 13 22 00 --- 10 08 00 18.4 73.1 -5.5 -63.8 1125 R 1 0 13 23 00 ARP220 10 09 01 18.6 73.2 -5.4 -63.9 54 1 3 0 13 23 00 13 45 00 --- 10 31 04 23.2 75.5 -5.1 -65.3 1320 F 1 17600 13 47 00 ARP220 10 33 05 23.6 75.7 -5.0 -65.4 113 1 4 17600 13 47 00 14 09 00 --- 10 55 08 28.3 78.0 -4.7 -66.6 1320 R 1 0 14 11 00 ARP220 10 57 08 28.7 78.2 -4.6 -66.7 113 1 5 0 14 11 00 14 33 00 --- 11 19 12 33.3 80.5 -4.3 -67.7 1320 F 1 17600 14 40 00 1516+193 11 26 13 37.1 87.8 -3.8 -65.8 406 1 6 17600 14 40 00 14 43 00 --- 11 29 14 37.8 88.1 -3.8 -65.8 180 R 1 15200 14 43 00 ARP220 11 29 14 35.5 81.5 -4.1 -68.1 -11 1 6 15200 14 43 00 15 02 00 --- 11 48 17 39.5 83.6 -3.8 -68.8 1129 R 1 0 15 05 00 ARP220 11 51 17 40.2 83.9 -3.7 -68.9 173 1 7 0 15 05 00 15 27 00 --- 12 13 21 44.9 86.3 -3.4 -69.4 1320 F 1 17600 15 30 00 ARP220 12 16 21 45.5 86.7 -3.3 -69.5 173 1 8 17600 15 30 00 15 52 00 --- 12 38 25 50.3 89.3 -2.9 -69.7 1320 R 1 0 15 55 00 ARP220 12 41 26 50.9 89.7 -2.9 -69.8 173 1 9 0 15 55 00 16 17 00 --- 13 03 29 55.7 92.6 -2.5 -69.6 1320 F 1 17600 Schedule for VLBA_FD (Code Fd ) 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 --- 16 20 00 1516+193 13 06 30 58.6 102.9 -2.2 -62.8 167 1 10 17600 16 20 00 16 26 00 --- 13 12 31 59.8 104.2 -2.1 -62.2 360 R 1 12800 16 26 00 ARP220 13 12 31 57.6 93.9 -2.4 -69.4 -13 1 10 12800 16 26 00 16 42 00 --- 13 28 33 61.1 96.5 -2.1 -68.8 947 R 1 0 16 45 00 ARP220 13 31 34 61.7 97.0 -2.1 -68.6 173 1 11 0 16 45 00 17 07 00 --- 13 53 37 66.4 101.4 -1.7 -66.9 1320 F 1 17600 17 10 00 ARP220 13 56 38 67.0 102.1 -1.6 -66.5 173 1 12 17600 17 10 00 17 32 00 --- 14 18 41 71.6 108.2 -1.3 -63.0 1320 R 1 0 17 35 00 1613+341 14 21 42 66.2 74.0 -1.9 -90.8 151 1 13 0 17 35 00 17 38 00 --- 14 24 42 66.8 73.9 -1.8 -91.2 180 F 1 2400 17 38 00 ARP220 14 24 42 72.8 110.3 -1.2 -61.6 -30 1 13 2400 17 38 00 17 57 00 --- 14 43 46 76.6 119.0 -0.9 -55.2 1110 F 1 17600 18 00 00 ARP220 14 46 46 77.1 120.7 -0.8 -53.8 173 1 14 17600 18 00 00 18 22 00 --- 15 08 50 80.8 139.2 -0.4 -37.8 1320 R 1 0 ----------- Tape Change ------------ 18 40 00 1613+341 15 26 53 79.5 67.1 -0.8 -106.6 1026 2 1 0 18 40 00 18 43 00 --- 15 29 53 80.1 66.0 -0.7 -108.1 180 F 1 2400 18 43 00 ARP220 15 29 53 82.8 170.6 -0.1 -8.8 -76 2 1 2400 18 43 00 19 02 00 --- 15 48 56 82.2 204.2 0.2 22.7 1064 F 1 17600 19 05 00 ARP220 15 51 57 81.9 208.8 0.3 26.9 171 2 2 17600 19 05 00 19 27 00 --- 16 14 00 78.8 232.9 0.6 48.4 1320 R 1 0 19 30 00 ARP220 16 17 01 78.3 235.1 0.7 50.3 172 2 3 0 19 30 00 19 52 00 --- 16 39 04 74.1 247.2 1.1 59.9 1320 F 1 17600 19 55 00 ARP220 16 42 05 73.5 248.5 1.1 60.8 173 2 4 17600 19 55 00 20 17 00 --- 17 04 09 69.0 255.6 1.5 65.3 1320 R 1 0 20 20 00 1613+341 17 07 09 78.2 291.1 0.9 103.9 150 2 5 0 20 20 00 20 23 00 --- 17 10 10 77.6 290.4 0.9 102.8 180 F 1 2400 20 23 00 ARP220 17 10 10 67.7 257.1 1.6 66.1 -28 2 5 2400 20 23 00 20 42 00 --- 17 29 13 63.7 261.2 1.9 68.0 1112 F 1 17600 Schedule for VLBA_FD (Code Fd ) 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 --- 20 45 00 ARP220 17 32 13 63.0 261.8 2.0 68.2 173 2 6 17600 20 45 00 21 07 00 --- 17 54 17 58.3 265.6 2.3 69.3 1320 R 1 0 21 10 00 ARP220 17 57 17 57.7 266.0 2.4 69.4 173 2 7 0 21 10 00 21 32 00 --- 18 19 21 52.9 269.1 2.7 69.7 1320 F 1 17600 21 35 00 ARP220 18 22 21 52.3 269.5 2.8 69.7 173 2 8 17600 21 35 00 21 57 00 --- 18 44 25 47.5 272.2 3.2 69.6 1320 R 1 0 22 00 00 1613+341 18 47 25 57.6 286.6 2.6 85.5 154 2 9 0 22 00 00 22 06 00 --- 18 53 26 56.3 286.8 2.7 84.8 360 F 1 4800 22 06 00 ARP220 18 53 26 45.6 273.3 3.3 69.5 -27 2 9 4800 22 06 00 22 22 00 --- 19 09 29 42.2 275.1 3.6 69.1 933 F 1 17600 22 25 00 ARP220 19 12 30 41.5 275.4 3.6 69.1 173 2 10 17600 22 25 00 22 47 00 --- 19 34 33 36.8 277.8 4.0 68.4 1320 R 1 0 22 50 00 ARP220 19 37 34 36.2 278.1 4.0 68.3 173 2 11 0 22 50 00 23 12 00 --- 19 59 37 31.5 280.4 4.4 67.3 1320 F 1 17600 23 15 00 ARP220 20 02 38 30.8 280.7 4.5 67.2 173 2 12 17600 23 15 00 23 37 00 --- 20 24 41 26.2 283.0 4.8 66.1 1320 R 1 0 23 40 00 1613+341 20 27 42 37.2 291.8 4.2 75.1 152 2 13 0 23 40 00 23 43 00 --- 20 30 42 36.6 292.0 4.3 74.8 180 F 1 2400 23 43 00 ARP220 20 30 42 24.9 283.6 4.9 65.8 -29 2 13 2400 23 43 00 23 58 00 --- 20 45 45 21.8 285.2 5.2 64.9 871 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