COVER INFORMATION Station: VLBA_OV (Code Ov ) 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 VLBA_OV (Code Ov ) 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: 871.49 871.49 879.49 879.49 887.49 887.49 895.49 895.49 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 07 30 00 B0850+054 04 24 52 21.3 100.0 -4.5 -51.9 0 1 1 0 07 30 00 07 33 00 --- 04 27 52 21.9 100.5 -4.4 -51.8 180 F 1 6 07 30 18 07 33 00 B0850+054 04 27 52 21.9 100.5 -4.4 -51.8 -4 1 1 6 07 33 00 07 45 00 --- 04 39 54 24.3 102.5 -4.2 -51.3 716 F 1 29 07 33 00 07 46 00 J0909+0121 04 40 54 18.8 103.2 -4.5 -50.8 43 1 1 29 07 46 00 07 48 00 =0906+015 04 42 55 19.2 103.5 -4.4 -50.7 120 F 1 33 07 46 18 07 48 00 B0850+054 04 42 55 24.8 103.0 -4.2 -51.2 -17 1 1 33 07 48 00 08 00 00 --- 04 54 57 27.2 105.1 -4.0 -50.5 703 F 1 56 07 48 00 08 01 00 J0909+0121 04 55 57 21.7 105.8 -4.2 -50.0 43 1 1 56 08 01 00 08 03 00 =0906+015 04 57 57 22.1 106.1 -4.2 -49.9 120 F 1 60 08 01 18 08 03 00 B0850+054 04 57 57 27.7 105.7 -3.9 -50.3 -17 1 1 60 08 03 00 08 15 00 --- 05 09 59 30.0 107.9 -3.7 -49.5 703 F 1 83 08 03 00 08 19 10 J0854+2006 05 14 10 39.3 93.7 -3.7 -57.8 225 1 1 83 08 19 10 08 22 10 =0851+202 05 17 10 39.9 94.2 -3.6 -57.7 180 F 1 89 08 19 28 08 22 10 J0909+0121 05 17 10 25.8 109.5 -3.9 -48.6 -34 1 1 89 08 22 10 08 25 00 =0906+015 05 20 01 26.3 110.1 -3.8 -48.4 136 F 1 95 08 22 10 08 25 00 B0850+054 05 20 01 31.9 109.8 -3.6 -48.8 -17 1 1 95 08 25 00 08 30 00 --- 05 25 02 32.9 110.8 -3.5 -48.4 283 F 1 104 08 25 00 08 31 00 J0909+0121 05 26 02 27.4 111.2 -3.7 -48.0 43 1 1 104 08 31 00 08 33 00 =0906+015 05 28 02 27.8 111.6 -3.7 -47.8 120 F 1 108 08 31 18 08 33 00 B0850+054 05 28 02 33.4 111.4 -3.4 -48.1 -17 1 1 108 08 33 00 08 45 00 --- 05 40 04 35.6 113.8 -3.2 -47.0 703 F 1 131 08 33 00 08 46 00 J0909+0121 05 41 04 30.2 114.1 -3.5 -46.6 43 1 1 131 08 46 00 08 48 00 =0906+015 05 43 04 30.6 114.5 -3.4 -46.4 120 F 1 135 08 46 18 Schedule for VLBA_OV (Code Ov ) 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 48 00 B0850+054 05 43 04 36.2 114.5 -3.2 -46.7 -17 1 1 135 08 48 00 09 00 00 --- 05 55 06 38.3 117.1 -3.0 -45.4 703 F 1 158 08 48 00 09 01 00 J0909+0121 05 56 07 32.9 117.2 -3.2 -45.1 43 1 1 158 09 01 00 09 03 00 =0906+015 05 58 07 33.2 117.6 -3.2 -44.9 120 F 1 162 09 01 18 09 03 00 B0850+054 05 58 07 38.9 117.7 -2.9 -45.0 -17 1 1 162 09 03 00 09 15 00 --- 06 10 09 41.0 120.5 -2.7 -43.5 703 F 1 185 09 03 00 09 17 50 J0854+2006 06 12 59 50.9 104.5 -2.7 -55.1 144 1 1 185 09 17 50 09 21 00 =0851+202 06 16 10 51.5 105.2 -2.7 -54.9 190 F 1 192 09 18 08 09 21 00 J0909+0121 06 16 10 36.4 121.6 -2.9 -42.7 -36 1 1 192 09 21 00 09 24 00 =0906+015 06 19 10 36.9 122.2 -2.8 -42.3 144 F 1 197 09 21 00 09 24 00 B0850+054 06 19 10 42.5 122.7 -2.6 -42.3 -17 1 1 197 09 24 00 09 32 00 --- 06 27 12 43.8 124.8 -2.4 -41.0 463 F 1 213 09 24 00 09 33 00 J0909+0121 06 28 12 38.4 124.4 -2.7 -41.1 43 1 1 213 09 33 00 09 35 00 =0906+015 06 30 12 38.7 124.9 -2.7 -40.8 120 F 1 217 09 33 18 09 35 00 B0850+054 06 30 12 44.3 125.6 -2.4 -40.6 -17 1 1 217 09 35 00 09 47 00 --- 06 42 14 46.2 128.9 -2.2 -38.5 703 F 1 240 09 35 00 09 48 00 J0909+0121 06 43 14 40.8 128.1 -2.4 -38.8 43 1 1 240 09 48 00 09 50 00 =0906+015 06 45 15 41.1 128.6 -2.4 -38.5 120 F 1 244 09 48 18 09 50 00 B0850+054 06 45 15 46.7 129.7 -2.1 -38.0 -17 1 1 244 09 50 00 10 00 00 --- 06 55 16 48.2 132.7 -2.0 -36.0 583 F 1 263 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 v6cm_2 in /home/arana/cwalker/sched/catalogs/freq.dat Setup group: 9 Station: VLBA_OV 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= 4100.00 4100.00 4100.00 4100.00 4100.00 4100.00 4100.00 4100.00 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= U U U U U U U U IF = A C A C A C A C VLBA FE= 6cm omit 6cm omit VLBA Synth= 15.4 4.1 15.4 The following frequency sets based on this setup were used. Frequency Set: 9 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= 871.49 871.49 879.49 879.49 887.49 887.49 895.49 895.49 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 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