COVER INFORMATION Station: VLBA_KP (Code Kp ) 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_KP (Code Kp ) 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 14 30 00 B0850+054 04 55 43 28.6 102.6 -4.0 -56.3 0 1 1 0 14 30 00 14 41 00 --- 05 06 44 30.9 104.3 -3.8 -55.6 660 F 1 0 14 30 18 14 41 00 B0850+054 05 06 44 30.9 104.3 -3.8 -55.6 -4 1 1 0 14 41 00 14 52 00 --- 05 17 46 33.1 106.2 -3.6 -54.9 656 F 1 0 14 41 00 14 53 00 J0909+0121 05 18 46 27.8 107.3 -3.8 -54.1 43 1 1 0 14 53 00 14 55 00 =0906+015 05 20 47 28.2 107.6 -3.8 -54.0 120 F 1 0 14 53 18 14 55 00 B0850+054 05 20 47 33.8 106.7 -3.5 -54.7 -17 1 1 0 14 55 00 15 05 00 --- 05 30 48 35.8 108.5 -3.4 -53.9 583 F 1 0 14 55 00 15 05 00 B0850+054 05 30 48 35.8 108.5 -3.4 -53.9 -4 1 1 0 15 05 00 15 15 00 --- 05 40 50 37.8 110.3 -3.2 -53.0 596 F 1 0 15 05 00 15 17 00 J0854+2006 05 42 50 45.6 93.3 -3.2 -64.4 98 1 1 0 15 17 00 15 21 00 =0851+202 05 46 51 46.4 93.9 -3.1 -64.3 240 F 1 0 15 17 18 15 21 00 J0909+0121 05 46 51 33.4 112.2 -3.4 -51.8 -32 1 1 0 15 21 00 15 24 00 =0906+015 05 49 51 34.0 112.8 -3.3 -51.5 148 F 1 0 15 21 00 15 24 00 B0850+054 05 49 51 39.6 112.1 -3.1 -52.1 -17 1 1 0 15 24 00 15 31 30 --- 05 57 23 41.0 113.6 -2.9 -51.3 433 F 1 0 15 24 00 15 31 30 B0850+054 05 57 23 41.0 113.6 -2.9 -51.3 -4 1 1 0 15 31 30 15 39 00 --- 06 04 54 42.5 115.2 -2.8 -50.4 446 F 1 0 15 31 30 15 40 00 J0909+0121 06 05 54 37.1 115.9 -3.1 -49.8 43 1 1 0 15 40 00 15 42 00 =0906+015 06 07 54 37.5 116.3 -3.0 -49.5 120 F 1 0 15 40 18 15 42 00 B0850+054 06 07 54 43.1 115.8 -2.8 -50.1 -17 1 1 0 15 42 00 15 52 00 --- 06 17 56 45.0 118.1 -2.6 -48.7 583 F 1 0 15 42 00 15 52 00 B0850+054 06 17 56 45.0 118.1 -2.6 -48.7 -4 1 1 0 15 52 00 16 02 00 --- 06 27 58 46.8 120.5 -2.4 -47.2 596 F 1 0 15 52 00 Schedule for VLBA_KP (Code Kp ) 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 04 00 J0854+2006 06 29 58 55.5 101.1 -2.4 -62.4 97 1 1 0 16 04 00 16 08 00 =0851+202 06 33 59 56.3 101.9 -2.4 -62.1 240 F 1 0 16 04 18 16 08 00 J0909+0121 06 33 59 42.3 122.0 -2.6 -46.0 -34 1 1 0 16 08 00 16 11 00 =0906+015 06 36 59 42.8 122.7 -2.5 -45.6 146 F 1 0 16 08 00 16 11 00 B0850+054 06 36 59 48.5 122.8 -2.3 -45.7 -17 1 1 0 16 11 00 16 18 30 --- 06 44 30 49.8 124.8 -2.1 -44.4 433 F 1 0 16 11 00 16 18 30 B0850+054 06 44 30 49.8 124.8 -2.1 -44.4 -4 1 1 0 16 18 30 16 26 00 --- 06 52 02 51.1 127.0 -2.0 -42.9 446 F 1 0 16 18 30 16 26 00 J0909+0121 06 52 02 45.5 126.5 -2.3 -43.0 -17 1 1 0 16 26 00 16 28 30 =0906+015 06 54 32 45.9 127.1 -2.2 -42.6 133 F 1 0 16 26 00 16 28 30 B0850+054 06 54 32 51.5 127.7 -2.0 -42.4 -17 1 1 0 16 28 30 16 38 10 --- 07 04 14 53.1 130.6 -1.8 -40.3 563 F 1 0 16 28 30 16 38 10 B0850+054 07 04 14 53.1 130.6 -1.8 -40.3 -4 1 1 0 16 38 10 16 47 50 --- 07 13 55 54.6 133.8 -1.7 -37.9 576 F 1 0 16 38 10 16 47 50 B0850+054 07 13 55 54.6 133.8 -1.7 -37.9 -4 1 1 0 16 47 50 17 00 00 --- 07 26 07 56.4 138.1 -1.5 -34.6 726 F 1 0 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: 8 Station: VLBA_KP 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: 8 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 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