COVER INFORMATION Station: ARECIBO (Code Ar ) Experiment: GD021 format, 18 cm, Arp 220, Phil Diamond, June 2006 Exp. Code: GD021A Schedule Version: 1.00 Processed by SCHED version: 6.04 March 2006 PI: Phil Diamond Address: MERLIN/VLBI National Facility Jodrell Bank, Macclesfield Cheshire, SK11 9DL England Phone: (+44) (0)1477 572625 EMAIL: pdiamond@jb.man.ac.uk Fax: (+44) (0)1477 571618 Phone during observation: (+44) (0)1477 572625 Observing mode: 256-8-2 Notes: Primary fringe finder 1613+341 Schedule for ARECIBO (Code Ar ) Page 2 GD021 format, 18 cm, Arp 220, Phil Diamond, June 2006 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. For disks, the footages are really the GBytes TPStart: Tape motion start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) SYNC ---------------------------------------------------------------------------------------- --- Wed 7 Jun 2006 Day 158 --- Next scan frequencies: 1633.99 1633.99 1641.99 1641.99 1649.99 1649.99 1657.99 1657.99 Next BBC frequencies: 801.01 801.01 793.01 793.01 785.01 785.01 777.01 777.01 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 01 37 00 1516+193 14 11 16 74.4 83.1 -1.1 -91.6 0 1 1 0 01 37 00 01 40 00 --- 14 14 17 75.1 83.0 -1.0 -91.9 180 F 1 2400 01 37 20 01 40 00 ARP220 14 14 17 70.4 71.3 -1.3 -101.4 -120 1 1 2400 01 40 00 01 59 00 --- 14 33 20 74.7 67.8 -1.0 -106.7 1020 F 1 17600 01 40 10 02 03 00 ARP220 14 37 20 75.5 66.7 -1.0 -108.1 210 1 2 17600 02 03 00 02 25 00 --- 14 59 24 80.2 56.9 -0.6 -119.9 1320 R 1 0 02 03 20 02 28 00 ARP220 15 02 24 80.8 54.8 -0.5 -122.3 157 1 3 0 02 28 00 02 50 00 --- 15 24 28 84.3 25.7 -0.2 -153.4 1320 F 1 17600 02 28 20 02 52 00 ARP220 15 26 28 84.5 381.4 -0.1 -157.8 -745 1 4 17600 02 52 00 03 14 00 --- 15 48 32 84.0 329.5 0.2 148.3 575 R 1 0 02 52 20 03 17 00 1516+193 15 51 33 81.8 279.6 0.6 96.8 49 1 5 0 03 17 00 03 27 00 --- 16 01 34 79.5 278.1 0.7 94.5 600 F 1 8000 03 17 20 03 27 00 ARP220 16 01 34 82.0 311.0 0.4 128.7 -90 1 5 8000 03 27 00 03 39 00 --- 16 13 36 79.7 301.5 0.6 118.1 630 F 1 17600 03 27 10 03 42 00 ARP220 16 16 37 79.1 299.8 0.7 116.1 157 1 6 17600 03 42 00 04 04 00 --- 16 38 40 74.3 291.9 1.1 106.2 1320 R 1 0 03 42 20 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: 17 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 used at high density at 160.000 ips. Time per pass is 22.00 minutes. 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: 17 Setup file default. Used pcal sets: 1 LO sum= 1633.99 1633.99 1641.99 1641.99 1649.99 1649.99 1657.99 1657.99 BBC fr= 801.01 801.01 793.01 793.01 785.01 785.01 777.01 777.01 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 = OFF PCALXB1= S1 S2 S3 S4 S5 S6 S7 S8 PCALXB2= M1 M2 M3 M4 M5 M6 M7 M8 PCALFR1= 0 0 0 0 0 0 0 0 PCALFR2= 0 0 0 0 0 0 0 0 Track assignments are: track1= 2, 10, 18, 26, 3, 11, 19, 27 barrel=roll_off SOURCE LIST -- GD021 format, 18 cm, Arp 220, Phil Diamond, June 2006 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) Error (B1950) (J2000) (Date) (mas) * ARP220 15 32 46.905485 * 15 34 57.250000 15 35 15.454050 0.00 23 40 07.75728 * 23 30 11.33000 23 28 49.59553 0.00 From catalog imbedded in main SCHED input file. 16.033 scan hours, 699.690 baseline hours above horizon. * 1516+193 15 14 40.987286 * 15 16 56.797600 15 17 15.605042 0.00 19 43 10.96935 * 19 32 13.01900 19 30 43.73756 0.00 From catalog imbedded in main SCHED input file. 0.300 scan hours, 30.267 baseline hours above horizon. * 1613+341 16 11 47.914510 * 16 13 41.064500 16 13 57.321137 0.00 34 20 19.83496 * 34 12 47.91000 34 11 43.55505 0.00 From catalog imbedded in main SCHED input file. 0.983 scan hours, 27.604 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) ARP220 129.4 1516+193 130.9 1613+341 122.0 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