COVER INFORMATION Station: VLA27 (Code Y ) Experiment: Central Image in Grav. Lens B0850+054 / Boyce, Hewitt & Myers Exp. Code: BB209C Schedule Version: 1.00 Processed by SCHED version: 6.05 June 2006 PI: Edward R. Boyce Address: Jodrell Bank Observatory Macclesfield Cheshire SK11 9DL United Kingdom Phone: +44-1477-572629 (w) / +44-1625-890362 (h) EMAIL: eboyce@jb.man.ac.uk Fax: +44-1477-571618 Phone during observation: +44-1477-572629 (w) Observing mode: 256-8-2 Notes: HSA with Y27,GBT,AR Target: B0850+054 VLA phase-up: J0909+0121 (1.3 Jy at VLA resolution) Fringe Finder & amp check: J0854+2006 (~1 Jy) Schedule for VLA27 (Code Y ) Page 2 Central Image in Grav. Lens B0850+054 / Boyce, Hewitt & Myers 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. 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) SYNC ---------------------------------------------------------------------------------------- --- Sun 3 Dec 2006 Day 337 --- Next scan frequencies: 4971.49 4971.49 4979.49 4979.49 4987.49 4987.49 4995.49 4995.49 Next BBC frequencies: 611.39 611.39 619.39 619.39 627.39 627.39 635.39 635.39 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 07 15 00 3C147 04 52 27 71.7 26.8 -0.8 -144.7 0 1 1 0 Stopped 07 20 00 --- 04 57 28 72.1 24.6 -0.8 -147.7 300 S 1 10 07 20 00 J0909+0121 04 57 28 22.9 104.8 -4.2 -53.2 -174 1 1 10 Stopped 07 30 00 =0906+015 05 07 30 24.9 106.4 -4.0 -52.6 426 S 1 29 07 30 00 B0850+054 05 07 30 30.5 105.7 -3.8 -53.2 -43 1 1 29 07 30 00 07 33 00 --- 05 10 30 31.1 106.2 -3.7 -53.0 137 F 1 35 07 30 18 07 33 00 B0850+054 05 10 30 31.1 106.2 -3.7 -53.0 -26 1 1 35 07 33 00 07 45 00 --- 05 22 32 33.4 108.4 -3.5 -52.1 694 F 1 58 07 33 00 07 46 00 J0909+0121 05 23 32 28.0 109.2 -3.8 -51.5 18 1 1 58 07 46 00 07 48 00 =0906+015 05 25 33 28.4 109.5 -3.7 -51.3 120 F 1 62 07 46 18 07 48 00 B0850+054 05 25 33 34.0 108.9 -3.5 -51.9 -43 1 1 62 07 48 00 08 00 00 --- 05 37 35 36.4 111.2 -3.3 -50.8 677 F 1 85 07 48 00 08 01 00 J0909+0121 05 38 35 31.0 111.9 -3.5 -50.2 18 1 1 85 08 01 00 08 03 00 =0906+015 05 40 35 31.3 112.3 -3.5 -50.1 120 F 1 89 08 01 18 08 03 00 B0850+054 05 40 35 37.0 111.8 -3.2 -50.6 -43 1 1 89 08 03 00 08 15 00 --- 05 52 37 39.2 114.2 -3.0 -49.3 677 F 1 112 08 03 00 08 19 10 J0854+2006 05 56 48 48.3 97.8 -3.0 -60.9 197 1 1 112 08 19 10 08 22 10 =0851+202 05 59 48 48.9 98.3 -2.9 -60.8 180 F 1 118 08 19 28 08 22 10 J0909+0121 05 59 48 35.0 116.0 -3.2 -48.1 -68 1 1 118 08 22 10 08 25 00 =0906+015 06 02 39 35.5 116.6 -3.1 -47.8 102 F 1 124 08 22 10 08 25 00 B0850+054 06 02 39 41.1 116.4 -2.8 -48.2 -43 1 1 124 08 25 00 08 30 00 --- 06 07 40 42.0 117.5 -2.8 -47.5 257 F 1 133 08 25 00 08 31 00 J0909+0121 06 08 40 36.6 117.9 -3.0 -47.1 18 1 1 133 08 31 00 08 33 00 =0906+015 06 10 40 37.0 118.3 -3.0 -46.8 120 F 1 137 08 31 18 Schedule for VLA27 (Code Y ) Page 3 Central Image in Grav. Lens B0850+054 / Boyce, Hewitt & Myers 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. 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) SYNC ---------------------------------------------------------------------------------------- --- Sun 3 Dec 2006 Day 337 --- 08 33 00 B0850+054 06 10 40 42.6 118.2 -2.7 -47.1 -43 1 1 137 08 33 00 08 45 00 --- 06 22 42 44.8 121.1 -2.5 -45.4 677 F 1 160 08 33 00 08 46 00 J0909+0121 06 23 42 39.3 121.2 -2.8 -45.1 18 1 1 160 08 46 00 08 48 00 =0906+015 06 25 43 39.7 121.6 -2.7 -44.9 120 F 1 164 08 46 18 08 48 00 B0850+054 06 25 43 45.3 121.8 -2.5 -45.0 -43 1 1 164 08 48 00 09 00 00 --- 06 37 45 47.4 124.9 -2.3 -43.0 677 F 1 187 08 48 00 09 01 00 J0909+0121 06 38 45 41.9 124.7 -2.5 -42.9 18 1 1 187 09 01 00 09 03 00 =0906+015 06 40 45 42.3 125.2 -2.5 -42.6 120 F 1 191 09 01 18 09 03 00 B0850+054 06 40 45 47.9 125.7 -2.2 -42.5 -43 1 1 191 09 03 00 09 15 00 --- 06 52 47 49.9 129.2 -2.0 -40.2 677 F 1 215 09 03 00 09 17 50 J0854+2006 06 55 37 60.1 110.2 -2.0 -55.9 113 1 1 215 09 17 50 09 21 00 =0851+202 06 58 48 60.7 111.0 -1.9 -55.4 190 F 1 221 09 18 08 09 21 00 J0909+0121 06 58 48 45.2 130.0 -2.2 -39.4 -73 1 1 221 09 21 00 09 24 00 =0906+015 07 01 48 45.7 130.8 -2.1 -38.9 107 F 1 226 09 21 00 09 24 00 B0850+054 07 01 48 51.3 131.9 -1.9 -38.2 -43 1 1 226 09 24 00 09 32 00 --- 07 09 50 52.5 134.5 -1.7 -36.4 437 F 1 242 09 24 00 09 33 00 J0909+0121 07 10 50 47.1 133.4 -2.0 -37.0 18 1 1 242 09 33 00 09 35 00 =0906+015 07 12 50 47.4 134.0 -1.9 -36.6 120 F 1 246 09 33 18 09 35 00 B0850+054 07 12 50 52.9 135.5 -1.7 -35.7 -43 1 1 246 09 35 00 09 47 00 --- 07 24 52 54.6 139.7 -1.5 -32.6 677 F 1 269 09 35 00 09 48 00 J0909+0121 07 25 52 49.3 138.0 -1.7 -33.7 18 1 1 269 09 48 00 09 50 00 =0906+015 07 27 53 49.5 138.6 -1.7 -33.2 120 F 1 273 09 48 18 09 50 00 B0850+054 07 27 53 55.0 140.8 -1.4 -31.7 -43 1 1 273 09 50 00 10 00 00 --- 07 37 54 56.3 144.6 -1.3 -28.8 557 F 1 292 09 50 00 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: /home/arana/cwalker/sched/setups/v6cm-256-8-2.set Matches group y_vc in /home/arana/cwalker/sched/catalogs/freq.dat In VA mode, only IFs A and D are phased. Setup group: 1 Station: VLA27 Total bit rate: 256 Format: VLBA1:2 Bits per sample: 2 Sample rate: 16.000 Number of channels: 8 Speedup factor: 1.00 Disk used to record data. 1st LO= 4360.10 4360.10 4360.10 4360.10 4360.10 4360.10 4360.10 4360.10 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 D A D A D A D The following frequency sets based on this setup were used. Frequency Set: 1 Setup file default. Used pcal sets: 1 LO sum= 4971.49 4971.49 4979.49 4979.49 4987.49 4987.49 4995.49 4995.49 BBC fr= 611.39 611.39 619.39 619.39 627.39 627.39 635.39 635.39 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= 510 510 510 510 6510 6510 6510 6510 PCALFR2= 510 510 510 510 6510 6510 6510 6510 Track assignments are: track1= 2, 10, 18, 26, 3, 11, 19, 27 barrel=roll_off VLA specific information: (LO and FI cards not needed. Defaults shown.) VLABAND: VC VLABW: 0000 FEFILTER: 0000 VLAFEAB: 0.00 VLAFECD: 0.00 VLAIF: SYSCIF VLASYNA: 3960.10 VLASYNB: 3960.10 VLAROT: VLBCROT FLUKEA: 100.00 FLUKEB: 200.00 FLUKESET: 0 Details for VLA IFs: LO Sum Frequency span VLBI FIRSTLO VLA IF A: 4960.1000 4960.1000- 5010.1000 4360.1000 VLA IF B: 4960.1000 4960.1000- 5010.1000 4360.1000 VLA IF C: 4960.1000 4960.1000- 5010.1000 4360.1000 VLA IF D: 4960.1000 4960.1000- 5010.1000 4360.1000 With new digital patch panel, VLA IF = VLB IF. SOURCE LIST -- Central Image in Grav. Lens B0850+054 / Boyce, Hewitt & Myers 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) * B0850+054 08 50 15.244982 * 08 52 53.573600 08 53 16.280759 0.00 05 26 37.70053 * 05 15 15.66000 05 13 47.38517 0.00 From catalog imbedded in main SCHED input file. Proposal 1.833 scan hours, 124.920 baseline hours above horizon. J0542+4951 05 38 43.517525 * 05 42 36.137902 05 43 10.514368 0.32 0538+498 49 49 42.83710 * 49 51 07.23373 49 51 24.33012 0.41 * 3C147 /home/arana/cwalker/sched/catalogs/sources.vlba J0542+49 VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro 0.000 scan hours, 0.000 baseline hours above horizon. * J0854+2006 08 51 57.250618 * 08 54 48.874930 08 55 13.554277 0.21 0851+202 20 17 58.41741 * 20 06 30.64086 20 04 56.76169 0.40 J0854+20 /home/arana/cwalker/sched/catalogs/sources.vlba OJ287 VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro 0.103 scan hours, 8.017 baseline hours above horizon. * J0909+0121 09 06 35.181601 * 09 09 10.091607 09 09 32.211228 0.31 0906+015 01 33 48.12926 * 01 21 35.61778 01 20 01.16955 0.26 J0909+01 /home/arana/cwalker/sched/catalogs/sources.vlba VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro 0.331 scan hours, 14.929 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) B0850+054 116.2 3C147 149.4 J0854+2006 120.4 J0909+0121 110.9 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