COVER INFORMATION Station: VLA27 (Code Y ) 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 VLA27 (Code Y ) 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: 622.89 622.89 601.09 601.09 609.09 609.09 617.09 617.09 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 13 00 00 1613+341 09 31 15 10.9 55.9 -6.7 -56.0 0 1 1 0 13 00 00 13 03 00 --- 09 34 16 11.4 56.2 -6.7 -56.3 180 F 1 2400 13 03 00 ARP220 09 34 16 12.8 70.1 -6.0 -58.1 -36 1 1 2400 13 03 00 13 22 00 --- 09 53 19 16.5 72.4 -5.7 -59.4 1104 F 1 17600 13 23 00 ARP220 09 54 19 16.7 72.6 -5.7 -59.5 44 1 2 17600 13 23 00 13 45 00 --- 10 16 23 21.1 75.2 -5.3 -60.8 1320 R 1 0 13 47 00 ARP220 10 18 23 21.5 75.5 -5.3 -61.0 104 1 3 0 13 47 00 14 09 00 --- 10 40 26 25.9 78.1 -4.9 -62.1 1320 F 1 17600 14 11 00 ARP220 10 42 27 26.3 78.3 -4.9 -62.2 104 1 4 17600 14 11 00 14 33 00 --- 11 04 30 30.8 81.0 -4.5 -63.1 1320 R 1 0 14 40 00 1516+193 11 11 32 34.1 88.3 -4.1 -61.5 394 1 5 0 14 40 00 14 43 00 --- 11 14 32 34.8 88.8 -4.0 -61.5 180 F 1 2400 14 43 00 ARP220 11 14 32 32.9 82.2 -4.3 -63.5 -25 1 5 2400 14 43 00 15 02 00 --- 11 33 35 36.8 84.5 -4.0 -64.0 1115 F 1 17600 15 05 00 ARP220 11 36 36 37.4 84.9 -4.0 -64.1 163 1 6 17600 15 05 00 15 27 00 --- 11 58 39 42.0 87.8 -3.6 -64.5 1320 R 1 0 15 30 00 ARP220 12 01 40 42.6 88.2 -3.6 -64.5 163 1 7 0 15 30 00 15 52 00 --- 12 23 43 47.2 91.2 -3.2 -64.5 1320 F 1 17600 15 55 00 ARP220 12 26 44 47.8 91.7 -3.1 -64.5 163 1 8 17600 15 55 00 16 17 00 --- 12 48 48 52.3 95.1 -2.8 -64.1 1320 R 1 0 16 20 00 1516+193 12 51 48 54.7 104.9 -2.4 -58.1 150 1 9 0 16 20 00 16 26 00 --- 12 57 49 55.9 106.2 -2.3 -57.5 360 F 1 4800 16 26 00 ARP220 12 57 49 54.2 96.6 -2.6 -63.8 -29 1 9 4800 16 26 00 16 42 00 --- 13 13 52 57.5 99.6 -2.4 -63.0 931 F 1 17600 Schedule for VLA27 (Code Y ) 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 45 00 ARP220 13 16 52 58.1 100.1 -2.3 -62.8 163 1 10 17600 16 45 00 17 07 00 --- 13 38 56 62.6 105.0 -1.9 -60.7 1320 R 1 0 17 10 00 ARP220 13 41 56 63.2 105.7 -1.9 -60.4 163 1 11 0 17 10 00 17 32 00 --- 14 04 00 67.5 112.0 -1.5 -56.8 1320 F 1 17600 17 35 00 1613+341 14 07 00 63.9 80.7 -2.1 -81.2 118 1 12 17600 17 35 00 17 38 00 --- 14 10 01 64.5 80.9 -2.1 -81.5 180 R 1 15200 17 38 00 ARP220 14 10 01 68.6 114.1 -1.4 -55.5 -65 1 12 15200 17 38 00 17 57 00 --- 14 29 04 72.1 122.0 -1.1 -50.0 1075 R 1 0 18 00 00 ARP220 14 32 04 72.6 123.5 -1.0 -48.9 163 1 13 0 18 00 00 18 22 00 --- 14 54 08 76.1 137.1 -0.7 -37.9 1320 F 1 17600 18 25 00 3C286 14 57 09 71.5 264.8 1.4 73.2 -26 1 13 17600 Stopped 18 35 00 --- 15 07 10 69.5 266.6 1.6 73.6 574 S 1 17600 18 40 00 1613+341 15 12 11 77.3 85.1 -1.0 -86.2 13 1 14 17600 18 40 00 18 43 00 --- 15 15 11 77.9 85.3 -1.0 -86.5 180 R 1 15200 18 43 00 ARP220 15 15 11 78.6 156.4 -0.3 -21.2 -122 1 14 15200 18 43 00 19 02 00 --- 15 34 15 79.4 179.0 0.0 -0.9 1018 R 1 0 ----------- Tape Change ------------ 19 05 00 ARP220 15 37 15 79.4 182.8 0.0 2.5 159 2 1 0 19 05 00 19 27 00 --- 15 59 19 78.2 208.2 0.4 25.3 1320 F 1 17600 19 30 00 ARP220 16 02 19 77.9 211.2 0.5 27.9 161 2 2 17600 19 30 00 19 52 00 --- 16 24 23 74.9 228.8 0.8 42.8 1320 R 1 0 19 55 00 ARP220 16 27 23 74.4 230.6 0.9 44.3 162 2 3 0 19 55 00 20 17 00 --- 16 49 27 70.6 241.8 1.2 52.7 1320 F 1 17600 20 20 00 1613+341 16 52 27 82.0 273.6 0.6 88.2 117 2 4 17600 20 20 00 20 23 00 --- 16 55 28 81.4 273.8 0.7 87.9 180 R 1 15200 20 23 00 ARP220 16 55 28 69.5 244.2 1.3 54.4 -59 2 4 15200 20 23 00 20 42 00 --- 17 14 31 65.9 250.6 1.7 58.4 1081 R 1 0 20 45 00 ARP220 17 17 32 65.3 251.4 1.7 58.9 163 2 5 0 20 45 00 21 07 00 --- 17 39 35 60.9 257.0 2.1 61.6 1320 F 1 17600 Schedule for VLA27 (Code Y ) 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 --- 21 10 00 ARP220 17 42 36 60.3 257.6 2.1 61.9 163 2 6 17600 21 10 00 21 32 00 --- 18 04 39 55.8 262.0 2.5 63.4 1320 R 1 0 21 35 00 ARP220 18 07 40 55.2 262.6 2.5 63.6 163 2 7 0 21 35 00 21 57 00 --- 18 29 43 50.6 266.3 2.9 64.3 1320 F 1 17600 22 00 00 1613+341 18 32 44 61.4 280.2 2.3 80.3 133 2 8 17600 22 00 00 22 06 00 --- 18 38 45 60.2 280.6 2.4 79.8 360 R 1 12800 22 06 00 ARP220 18 38 45 48.7 267.6 3.1 64.5 -49 2 8 12800 22 06 00 22 22 00 --- 18 54 47 45.4 270.0 3.3 64.6 911 R 1 0 22 25 00 ARP220 18 57 48 44.8 270.4 3.4 64.6 163 2 9 0 22 25 00 22 47 00 --- 19 19 52 40.2 273.3 3.7 64.4 1320 F 1 17600 22 50 00 ARP220 19 22 52 39.6 273.7 3.8 64.3 163 2 10 17600 22 50 00 23 12 00 --- 19 44 56 35.1 276.5 4.2 63.8 1320 R 1 0 23 15 00 ARP220 19 47 56 34.4 276.9 4.2 63.7 163 2 11 0 23 15 00 23 37 00 --- 20 10 00 29.9 279.6 4.6 63.0 1320 F 1 17600 23 40 00 1613+341 20 13 00 41.3 288.0 4.0 72.2 131 2 12 17600 23 40 00 23 43 00 --- 20 16 01 40.7 288.3 4.0 72.0 180 R 1 15200 23 43 00 ARP220 20 16 01 28.7 280.3 4.7 62.7 -51 2 12 15200 23 43 00 23 58 00 --- 20 31 03 25.6 282.1 4.9 62.0 849 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 --- WARNING --- This group does not match an entry in the frequency catalog. Be very sure that it is correct. Setup group: 10 Station: VLA27 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= 1010.10 1010.10 1039.90 1039.90 1039.90 1039.90 1039.90 1039.90 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= U U U U U U U U IF = A C B D B D B D The following frequency sets based on this setup were used. Frequency Set: 9 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= 622.89 622.89 601.09 601.09 609.09 609.09 617.09 617.09 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 VLA specific information: (LO and FI cards will be written.) VLABAND: VL VLABW: 0000 FEFILTER: 2020 VLAFEAB: -3.20 VLAFECD: -3.20 VLAIF: SYSLIF VLASYNA: 3810.10 VLASYNB: 3839.90 VLAROT: VLBLROT FLUKEA: 100.00 FLUKEB: 200.00 FLUKESET: 0 Details for VLA IFs: LO Sum Frequency span VLBI FIRSTLO VLA IF A: 1610.1000 1630.8500- 1643.3500 1010.1000 VLA IF B: 1639.9000 1639.9000- 1689.9000 1039.9000 VLA IF C: 1610.1000 1630.8500- 1643.3500 1010.1000 VLA IF D: 1639.9000 1639.9000- 1689.9000 1039.9000 With new digital patch panel, VLA IF = VLB IF. 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