COVER INFORMATION Station: VLBA_MK (Code Mk ) Experiment: Central Image in Grav. Lens B0850+054 / Boyce, Hewitt & Myers Exp. Code: BB209B Schedule Version: 1.00 Processed by SCHED version: 6.02 July 2005 PI: Edward R. Boyce Address: NRAO, P.O. Box O Socorro, NM 87801 USA Phone: +1-505-835-7230 (w) / +1-505-838-0389 (h) EMAIL: eboyce@nrao.edu Fax: +1-505-835-7027 Phone during observation: +1-505-835-7230 (w) / +1-505-838-0389 (h) 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_MK (Code Mk ) 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. 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 ---------------------------------------------------------------------------------------- --- Fri 19 Aug 2005 Day 231 --- 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 15 17 00 J0854+2006 02 47 28 5.0 70.4 -6.1 -70.7 0 1 1 0 15 17 00 15 21 00 =0851+202 02 51 29 5.9 70.7 -6.1 -71.0 240 F 1 3200 15 17 08 15 24 00 B0850+054 02 54 29 2.1 85.2 -6.0 D -70.3 164 1 1 3200 15 24 00 15 31 30 --- 03 02 00 3.8 85.8 -5.9 -70.4 0 F 1 9200 15 24 08 15 31 30 B0850+054 03 02 00 3.8 85.8 -5.9 -70.4 -4 1 1 9200 15 31 30 15 39 00 --- 03 09 32 5.6 86.4 -5.7 -70.6 446 F 1 15200 15 31 30 15 42 00 B0850+054 03 12 32 6.3 86.7 -5.7 -70.6 173 1 2 15200 15 42 00 15 52 00 --- 03 22 34 8.7 87.5 -5.5 -70.7 600 R 1 12000 15 42 08 15 52 00 B0850+054 03 22 34 8.7 87.5 -5.5 -70.7 -4 1 2 12000 15 52 00 16 02 00 --- 03 32 35 11.0 88.4 -5.3 -70.8 596 R 1 4000 15 52 00 16 04 00 J0854+2006 03 34 36 15.5 73.8 -5.3 -74.2 104 1 2 4000 16 04 00 16 08 00 =0851+202 03 38 36 16.4 74.1 -5.3 -74.4 240 R 1 800 16 04 08 16 08 00 J0909+0121 03 38 36 7.3 91.2 -5.5 -70.2 -24 1 3 800 16 08 00 16 11 00 =0906+015 03 41 37 8.0 91.5 -5.5 -70.2 156 F 1 1600 16 08 00 16 11 00 B0850+054 03 41 37 13.2 89.1 -5.2 -70.9 -16 1 3 1600 16 11 00 16 18 30 --- 03 49 08 14.9 89.7 -5.1 -70.9 434 F 1 7600 16 11 00 16 18 30 B0850+054 03 49 08 14.9 89.7 -5.1 -70.9 -4 1 3 7600 16 18 30 16 26 00 --- 03 56 39 16.7 90.4 -4.9 -70.9 446 F 1 13600 16 18 30 16 26 00 J0909+0121 03 56 39 11.6 92.8 -5.2 -70.1 -16 1 3 13600 16 26 00 16 28 30 =0906+015 03 59 10 12.1 93.0 -5.2 -70.0 134 F 1 15600 16 26 00 16 28 30 B0850+054 03 59 10 17.3 90.6 -4.9 -70.9 -16 1 4 15600 16 28 30 16 38 10 --- 04 08 51 19.6 91.4 -4.7 -70.8 564 R 1 11867 16 28 30 16 38 10 B0850+054 04 08 51 19.6 91.4 -4.7 -70.8 -4 1 4 11867 16 38 10 16 47 50 --- 04 18 33 21.8 92.3 -4.6 -70.7 576 R 1 4133 16 38 10 Schedule for VLBA_MK (Code Mk ) 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. 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 ---------------------------------------------------------------------------------------- --- Fri 19 Aug 2005 Day 231 --- 16 47 50 B0850+054 04 18 33 21.8 92.3 -4.6 -70.7 -4 1 5 4133 16 47 50 17 00 00 --- 04 30 45 24.7 93.4 -4.4 -70.6 726 F 1 5600 16 47 50 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: /home/filehost/cwalker/sched/setups/v6cm-256-8-2.set Matches group v6cm_2 in /home/filehost/cwalker/sched/catalogs/freq.dat Setup group: 11 Station: VLBA_MK 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 used at high density at 160.000 ips. Time per pass is 22.00 minutes. 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: 13 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_auto 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 14.412131 * 08 52 52.741000 08 53 09.141565 0.00 05 26 37.65607 * 05 15 15.66000 05 14 12.15845 0.00 From catalog imbedded in main SCHED input file. Proposal 2.058 scan hours, 137.658 baseline hours above horizon. J0542+4951 05 38 43.517527 * 05 42 36.137904 05 43 00.989881 0.33 0538+498 49 49 42.83710 * 49 51 07.23373 49 51 16.41963 0.41 * 3C147 /home/filehost/cwalker/sched/catalogs/sources.vlba J0542+49 VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.000 scan hours, 0.000 baseline hours above horizon. * J0854+2006 08 51 57.250617 * 08 54 48.874929 08 55 06.781057 0.21 0851+202 20 17 58.41740 * 20 06 30.64085 20 05 25.10711 0.40 J0854+20 /home/filehost/cwalker/sched/catalogs/sources.vlba OJ287 VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.133 scan hours, 9.700 baseline hours above horizon. * J0909+0121 09 06 35.181586 * 09 09 10.091592 09 09 26.075993 0.32 0906+015 01 33 48.12897 * 01 21 35.61749 01 20 26.39832 0.28 J0909+01 /home/filehost/cwalker/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.208 scan hours, 10.333 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 17.1 3C147 63.2 J0854+2006 16.4 J0909+0121 16.1 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