COVER INFORMATION Station: GBT_VLBA (Code Gb ) Experiment: GD018 Exp. Code: GD018 Schedule Version: 1.00 Processed by SCHED version: NRAO internal release of 4 October 2004 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: Phase-referencing of a source at 21cm (256 Mb/s) Notes: P Schedule for GBT_VLBA (Code Gb ) Page 2 GD018 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) ---------------------------------------------------------------------------------------- --- Fri 4 Mar 2005 Day 63 --- Next scan frequencies: 1400.10 1400.10 1408.10 1408.10 1416.10 1416.10 1424.10 1424.10 Next BBC frequencies: 649.90 649.90 641.90 641.90 633.90 633.90 625.90 625.90 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 16 17 00 0234+285 21 47 44 30.3 75.6 -4.8 -60.0 0 1 1 0 16 17 00 16 28 00 --- 21 58 46 32.4 77.0 -4.7 -60.6 660 F 1 8800 16 29 00 IRAS02524 21 59 46 25.2 82.4 -4.9 -56.3 10 1 1 8800 16 29 00 16 36 00 --- 22 06 47 26.5 83.4 -4.8 -56.5 420 F 1 14400 16 36 00 J0257+1847 22 06 47 24.8 85.0 -4.9 -55.5 -32 1 1 14400 16 36 00 16 40 00 =0254+185 22 10 48 25.6 85.6 -4.8 -55.6 208 F 1 17600 16 41 00 IRAS02524 22 11 48 27.5 84.1 -4.7 -56.6 28 1 2 17600 16 41 00 16 48 00 --- 22 18 49 28.9 85.1 -4.6 -56.7 420 R 1 12000 16 48 00 J0257+1847 22 18 49 27.2 86.8 -4.7 -55.7 -32 1 2 12000 16 48 00 16 52 00 =0254+185 22 22 50 27.9 87.4 -4.6 -55.8 208 R 1 8800 16 53 00 IRAS02524 22 23 50 29.8 85.9 -4.5 -56.8 28 1 2 8800 16 53 00 17 00 00 --- 22 30 51 31.2 86.9 -4.4 -56.9 420 R 1 3200 17 00 00 J0257+1847 22 30 51 29.5 88.6 -4.5 -55.8 -32 1 2 3200 17 00 00 17 04 00 =0254+185 22 34 52 30.3 89.3 -4.4 -55.8 208 R 1 0 17 06 00 0234+285 22 36 52 39.8 81.9 -4.0 -62.3 62 1 3 0 17 06 00 17 17 00 --- 22 47 54 41.9 83.4 -3.8 -62.6 660 F 1 8800 17 18 00 IRAS02524 22 48 54 34.7 89.6 -4.1 -57.0 10 1 3 8800 17 18 00 17 25 00 --- 22 55 55 36.1 90.7 -4.0 -57.0 420 F 1 14400 17 25 00 J0257+1847 22 55 55 34.4 92.6 -4.0 -55.8 -32 1 3 14400 17 25 00 17 29 00 =0254+185 22 59 56 35.2 93.2 -4.0 -55.7 208 F 1 17600 17 30 00 IRAS02524 23 00 56 37.1 91.5 -3.9 -57.0 28 1 4 17600 17 30 00 17 37 00 --- 23 07 57 38.5 92.6 -3.8 -56.9 420 R 1 12000 17 37 00 J0257+1847 23 07 57 36.8 94.5 -3.8 -55.6 -32 1 4 12000 17 37 00 17 41 00 =0254+185 23 11 58 37.6 95.2 -3.8 -55.5 208 R 1 8800 Schedule for GBT_VLBA (Code Gb ) Page 3 GD018 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) ---------------------------------------------------------------------------------------- --- Fri 4 Mar 2005 Day 63 --- 17 43 00 0234+285 23 13 58 47.0 87.0 -3.4 -63.2 63 1 4 8800 17 43 00 17 54 00 --- 23 25 00 49.1 88.7 -3.2 -63.4 660 R 1 0 17 55 00 IRAS02524 23 26 00 42.0 95.7 -3.5 -56.6 10 1 5 0 17 55 00 18 02 00 --- 23 33 02 43.4 96.9 -3.4 -56.4 420 F 1 5600 18 02 00 J0257+1847 23 33 02 41.6 98.9 -3.4 -54.8 -33 1 5 5600 18 02 00 18 06 00 =0254+185 23 37 02 42.4 99.6 -3.3 -54.7 207 F 1 8800 18 07 00 IRAS02524 23 38 02 44.3 97.8 -3.3 -56.2 28 1 5 8800 18 07 00 18 14 00 --- 23 45 04 45.7 99.1 -3.2 -56.0 420 F 1 14400 18 14 00 J0257+1847 23 45 04 44.0 101.2 -3.2 -54.3 -33 1 5 14400 18 14 00 18 18 00 =0254+185 23 49 04 44.7 101.9 -3.1 -54.1 207 F 1 17600 18 19 00 IRAS02524 23 50 04 46.7 100.0 -3.1 -55.7 28 1 6 17600 18 19 00 18 26 00 --- 23 57 05 48.0 101.4 -3.0 -55.3 420 R 1 12000 18 26 00 J0257+1847 23 57 05 46.3 103.5 -3.0 -53.6 -33 1 6 12000 18 26 00 18 30 00 =0254+185 00 01 06 47.0 104.4 -2.9 -53.3 207 R 1 8800 18 32 00 0234+285 00 03 06 56.6 94.9 -2.6 -63.0 62 1 6 8800 18 32 00 18 43 00 --- 00 14 08 58.7 97.0 -2.4 -62.6 660 R 1 0 18 43 00 IRAS02524 00 14 08 51.3 105.0 -2.7 -54.2 -51 1 7 0 18 43 00 18 50 00 --- 00 21 09 52.6 106.5 -2.6 -53.6 369 F 1 5600 18 50 00 J0257+1847 00 21 09 50.8 108.8 -2.6 -51.6 -33 1 7 5600 18 50 00 18 54 00 =0254+185 00 25 10 51.5 109.7 -2.5 -51.2 207 F 1 8800 19 09 00 0234+285 00 40 13 63.8 102.6 -2.0 -60.8 833 1 7 8800 19 09 00 19 20 00 --- 00 51 14 65.9 105.4 -1.8 -59.5 660 F 1 17600 19 21 00 IRAS02524 00 52 15 58.3 114.4 -2.1 -49.8 9 1 8 17600 19 21 00 19 28 00 --- 00 59 16 59.5 116.5 -1.9 -48.7 420 R 1 12000 19 28 00 J0257+1847 00 59 16 57.6 118.9 -2.0 -46.4 -34 1 8 12000 19 28 00 19 32 00 =0254+185 01 03 16 58.3 120.1 -1.9 -45.7 206 R 1 8800 19 33 00 IRAS02524 01 04 16 60.4 118.1 -1.9 -47.8 27 1 8 8800 19 33 00 19 40 00 --- 01 11 18 61.6 120.4 -1.7 -46.4 420 R 1 3200 19 40 00 J0257+1847 01 11 18 59.6 122.7 -1.8 -44.1 -34 1 8 3200 19 40 00 19 44 00 =0254+185 01 15 18 60.3 124.1 -1.7 -43.3 206 R 1 0 Schedule for GBT_VLBA (Code Gb ) Page 4 GD018 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) ---------------------------------------------------------------------------------------- --- Fri 4 Mar 2005 Day 63 --- 19 45 00 IRAS02524 01 16 18 62.4 122.1 -1.7 -45.3 27 1 9 0 19 45 00 19 52 00 --- 01 23 20 63.6 124.7 -1.5 -43.6 420 F 1 5600 19 52 00 J0257+1847 01 23 20 61.6 127.0 -1.6 -41.4 -34 1 9 5600 19 52 00 19 56 00 =0254+185 01 27 20 62.2 128.5 -1.5 -40.4 206 F 1 8800 19 58 00 0234+285 01 29 21 72.8 118.8 -1.1 -51.6 59 1 9 8800 19 58 00 20 09 00 --- 01 40 22 74.6 124.4 -1.0 -47.5 660 F 1 17600 20 10 00 IRAS02524 01 41 23 66.4 132.2 -1.2 -38.4 6 1 10 17600 20 10 00 20 17 00 --- 01 48 24 67.4 135.5 -1.1 -36.0 420 R 1 12000 20 17 00 J0257+1847 01 48 24 65.2 137.5 -1.2 -34.0 -33 1 10 12000 20 17 00 20 21 00 =0254+185 01 52 24 65.7 139.4 -1.1 -32.6 207 R 1 8800 20 22 00 IRAS02524 01 53 25 68.0 138.1 -1.0 -34.1 26 1 10 8800 20 22 00 20 29 00 --- 02 00 26 68.9 141.8 -0.9 -31.2 420 R 1 3200 20 29 00 J0257+1847 02 00 26 66.7 143.4 -1.0 -29.5 -33 1 10 3200 20 29 00 20 33 00 =0254+185 02 04 26 67.2 145.6 -0.9 -27.9 207 R 1 0 20 34 00 IRAS02524 02 05 27 69.5 144.7 -0.8 -29.0 26 1 11 0 20 34 00 20 41 00 --- 02 12 28 70.3 148.9 -0.7 -25.7 420 F 1 5600 20 41 00 J0257+1847 02 12 28 68.0 150.0 -0.8 -24.4 -33 1 11 5600 20 41 00 20 45 00 =0254+185 02 16 28 68.4 152.4 -0.7 -22.6 207 F 1 8800 20 47 00 0234+285 02 18 29 79.6 155.5 -0.3 -21.8 57 1 11 8800 20 47 00 20 58 00 --- 02 29 30 80.2 168.8 -0.1 -10.0 660 F 1 17600 20 59 00 IRAS02524 02 30 31 71.8 161.0 -0.4 -15.8 6 1 12 17600 20 59 00 21 06 00 --- 02 37 32 72.1 166.2 -0.3 -11.6 420 R 1 12000 21 06 00 J0257+1847 02 37 32 69.9 165.8 -0.3 -11.7 -34 1 12 12000 21 06 00 21 10 00 =0254+185 02 41 32 70.0 168.5 -0.3 -9.5 206 R 1 8800 21 11 00 IRAS02524 02 42 33 72.3 169.9 -0.2 -8.4 26 1 12 8800 21 11 00 21 18 00 --- 02 49 34 72.5 175.3 -0.1 -3.9 420 R 1 3200 21 18 00 J0257+1847 02 49 34 70.3 174.0 -0.1 -4.9 -33 1 12 3200 21 18 00 21 22 00 =0254+185 02 53 34 70.3 176.9 -0.1 -2.6 207 R 1 0 21 23 00 IRAS02524 02 54 35 72.6 179.2 0.0 -0.6 26 1 13 0 21 23 00 21 30 00 --- 03 01 36 72.5 184.7 0.1 3.9 420 F 1 5600 Schedule for GBT_VLBA (Code Gb ) Page 5 GD018 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) ---------------------------------------------------------------------------------------- --- Fri 4 Mar 2005 Day 63 --- 21 30 00 J0257+1847 03 01 36 70.4 182.5 0.1 2.1 -33 1 13 5600 21 30 00 21 34 00 =0254+185 03 05 36 70.3 185.3 0.1 4.4 207 F 1 8800 21 36 00 0234+285 03 07 37 78.6 214.7 0.5 30.6 39 1 13 8800 21 36 00 21 47 00 --- 03 18 39 77.2 224.2 0.7 38.5 660 F 1 17600 21 48 00 IRAS02524 03 19 39 71.8 198.3 0.4 15.3 -15 1 14 17600 21 48 00 21 55 00 --- 03 26 40 71.3 203.2 0.5 19.3 405 R 1 12000 21 55 00 J0257+1847 03 26 40 69.4 199.6 0.5 16.1 -37 1 14 12000 21 55 00 21 59 00 =0254+185 03 30 40 69.1 202.2 0.5 18.2 203 R 1 8800 22 01 00 0234+285 03 32 41 75.2 233.7 0.9 46.1 35 1 14 8800 22 01 00 22 12 00 --- 03 43 43 73.4 239.6 1.1 50.5 660 R 1 0 ----------- Tape Change ------------ 22 13 00 IRAS02524 03 44 43 69.6 214.8 0.8 28.6 -13 2 1 0 22 13 00 22 20 00 --- 03 51 44 68.8 218.8 0.9 31.7 407 F 1 5600 22 20 00 J0257+1847 03 51 44 67.2 214.5 0.9 27.9 -38 2 1 5600 22 20 00 22 24 00 =0254+185 03 55 45 66.7 216.6 1.0 29.6 202 F 1 8800 22 25 00 IRAS02524 03 56 45 68.2 221.4 1.0 33.7 20 2 1 8800 22 25 00 22 32 00 --- 04 03 46 67.2 225.0 1.1 36.4 420 F 1 14400 22 32 00 J0257+1847 04 03 46 65.7 220.7 1.1 32.6 -39 2 1 14400 22 32 00 22 36 00 =0254+185 04 07 47 65.2 222.6 1.2 34.0 201 F 1 17600 22 37 00 IRAS02524 04 08 47 66.5 227.3 1.2 38.1 20 2 2 17600 22 37 00 22 44 00 --- 04 15 48 65.5 230.5 1.3 40.3 420 R 1 12000 22 44 00 J0257+1847 04 15 48 64.1 226.2 1.3 36.7 -39 2 2 12000 22 44 00 22 48 00 =0254+185 04 19 49 63.5 227.9 1.4 37.9 201 R 1 8800 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: gd018.set Matches group gbt21cm in /usr/local/vlbi_sched/catalogs/freq.dat LO1=4.300, LO2=12.75, LO3=10.5 Setup group: 9 Station: GBT_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= 2050.00 2050.00 2050.00 2050.00 2050.00 2050.00 2050.00 2050.00 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= 1400.10 1400.10 1408.10 1408.10 1416.10 1416.10 1424.10 1424.10 BBC fr= 649.90 649.90 641.90 641.90 633.90 633.90 625.90 625.90 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 -- GD018 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) (B1950) (J2000) (Date) * IRAS02524 02 52 25.818883 * 02 55 17.104000 02 55 33.612154 20 46 49.93596 * 20 58 57.21000 21 00 14.83367 From catalog imbedded in main SCHED input file. 5.133 scan hours, 159.208 baseline hours above horizon. * 0234+285 02 34 55.589614 * 02 37 52.405700 02 38 09.257920 28 35 11.40675 * 28 48 08.98900 28 49 33.42288 From catalog imbedded in main SCHED input file. 3.117 scan hours, 103.342 baseline hours above horizon. * 3C84 03 16 29.567669 * 03 19 48.160500 03 20 07.287714 41 19 51.91590 * 41 30 42.10300 41 31 59.62536 From catalog imbedded in main SCHED input file. 0.183 scan hours, 3.850 baseline hours above horizon. * 3C286 13 28 49.657708 * 13 31 08.288000 13 31 23.683592 30 45 58.64136 * 30 30 32.96000 30 28 43.24878 From catalog imbedded in main SCHED input file. 0.000 scan hours, 0.000 baseline hours above horizon. * J0257+1847 02 54 56.156729 * 02 57 45.628773 02 58 01.993214 0254+185 18 35 05.60480 * 18 47 05.35615 18 48 21.60433 /usr/local/vlbi_sched/catalogs/sources.vlba VLBA Calib. Survey - ICRF Frame - reduced by GSFC group - Aug 2001 2.933 scan hours, 80.627 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) IRAS02524 63.5 0234+285 62.7 3C84 75.7 3C286 137.3 J0257+1847 63.3 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