COVER INFORMATION Station: ARECIBO (Code Ar ) 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 ARECIBO (Code Ar ) 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). ---------------------------------------------------------------------------------------- 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: 802.01 802.01 794.01 794.01 786.01 786.01 778.01 778.01 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 14 40 00 1516+193 13 54 59 70.6 443.2 -1.4 -90.1 0 1 1 0 14 40 00 14 43 00 --- 13 58 00 71.3 443.2 -1.3 -90.4 180 F 1 2400 14 43 00 ARP220 13 58 00 66.8 433.0 -1.6 D -98.2 -26 1 1 2400 14 43 00 15 02 00 --- 14 17 03 71.1 430.8 -1.3 -102.1 0 F 1 17600 15 05 00 ARP220 14 20 03 71.8 430.4 -1.2 -102.9 162 1 2 17600 15 05 00 15 27 00 --- 14 42 07 76.6 425.1 -0.9 -110.2 1320 R 1 0 15 30 00 ARP220 14 45 08 77.3 424.0 -0.8 -111.5 163 1 3 0 15 30 00 15 52 00 --- 15 07 11 81.7 410.4 -0.5 -127.1 1320 F 1 17600 15 55 00 ARP220 15 10 12 82.2 407.3 -0.4 -130.5 165 1 4 17600 15 55 00 16 17 00 --- 15 32 15 84.8 367.1 0.0 -172.7 1320 R 1 0 16 20 00 1516+193 15 35 16 85.5 286.1 0.3 104.6 -16 1 5 0 16 20 00 16 26 00 --- 15 41 17 84.1 282.6 0.4 100.7 344 F 1 4800 16 26 00 ARP220 15 41 17 84.6 344.5 0.1 163.9 -150 1 5 4800 16 26 00 16 42 00 --- 15 57 19 82.7 315.7 0.4 133.7 810 F 1 17600 16 45 00 ARP220 16 00 20 82.2 312.2 0.4 129.9 166 1 6 17600 16 45 00 17 07 00 --- 16 22 23 77.8 297.0 0.8 112.8 1320 R 1 0 17 10 00 ARP220 16 25 24 77.2 295.8 0.8 111.3 163 1 7 0 17 10 00 17 32 00 --- 16 47 28 72.3 290.1 1.2 103.5 1320 F 1 17600 17 35 00 1613+341 16 50 28 72.2 334.5 0.6 150.4 71 1 8 17600 17 35 00 17 38 00 --- 16 53 29 71.8 332.8 0.7 148.3 180 R 1 15200 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 arlbw4 in /usr/local/vlbi_sched/catalogs/freq.dat RX=LBW, with lfbf=4, TG 07-Oct-01 Setup group: 9 Station: ARECIBO Total bit rate: 256 Format: MKIV1:2 Bits per sample: 2 Sample rate: 16.000 Number of channels: 8 Passes/head pos: 1 Speedup factor: 1.00 Tape speeds: Low density - 270.000 ips, High density - 160.00 ips Time per pass for 17600 ft, High density tapes is: 00:22:00 1st LO= 2435.00 2435.00 2435.00 2435.00 2435.00 2435.00 2435.00 2435.00 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 The following frequency sets based on this setup were used. Frequency Set: 10 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= 802.01 802.01 794.01 794.01 786.01 786.01 778.01 778.01 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_off 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