COVER INFORMATION Station: VLBA_HN (Code Hn ) 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_HN (Code Hn ) 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 07 34 13 48.5 149.5 -1.3 -21.9 0 1 1 0 14 30 00 14 41 00 --- 07 45 15 49.4 153.4 -1.1 -19.2 660 F 1 8800 14 30 08 14 41 00 B0850+054 07 45 15 49.4 153.4 -1.1 -19.2 -4 1 1 8800 14 41 00 14 52 00 --- 07 56 16 50.3 157.5 -0.9 -16.3 656 F 1 17600 14 41 00 14 53 00 J0909+0121 07 57 17 45.4 153.8 -1.2 -18.8 44 1 2 17600 14 53 00 14 55 00 =0906+015 07 59 17 45.5 154.5 -1.2 -18.4 120 R 1 16000 14 53 08 14 55 00 B0850+054 07 59 17 50.5 158.6 -0.9 -15.5 -16 1 2 16000 14 55 00 15 05 00 --- 08 09 19 51.1 162.5 -0.7 -12.8 584 R 1 8000 14 55 00 15 05 00 B0850+054 08 09 19 51.1 162.5 -0.7 -12.8 -4 1 2 8000 15 05 00 15 15 00 --- 08 19 20 51.6 166.4 -0.6 -10.0 596 R 1 0 15 05 00 15 17 00 J0854+2006 08 21 21 66.1 160.1 -0.6 -15.4 85 1 3 0 15 17 00 15 21 00 =0851+202 08 25 21 66.3 162.4 -0.5 -13.7 240 F 1 3200 15 17 08 15 21 00 J0909+0121 08 25 21 47.3 163.6 -0.7 -11.9 -44 1 3 3200 15 21 00 15 24 00 =0906+015 08 28 22 47.4 164.7 -0.7 -11.1 136 F 1 5600 15 21 00 15 24 00 B0850+054 08 28 22 51.9 170.0 -0.4 -7.4 -15 1 3 5600 15 24 00 15 31 30 --- 08 35 53 52.1 173.0 -0.3 -5.1 435 F 1 11600 15 24 00 15 31 30 B0850+054 08 35 53 52.1 173.0 -0.3 -5.1 -4 1 3 11600 15 31 30 15 39 00 --- 08 43 24 52.2 176.0 -0.2 -2.9 446 F 1 17600 15 31 30 15 40 00 J0909+0121 08 44 24 48.0 170.6 -0.4 -6.9 46 1 4 17600 15 40 00 15 42 00 =0906+015 08 46 25 48.1 171.4 -0.4 -6.3 120 R 1 16000 15 40 08 15 42 00 B0850+054 08 46 25 52.3 177.3 -0.1 -2.0 -14 1 4 16000 15 42 00 15 52 00 --- 08 56 26 52.3 181.3 0.1 1.0 586 R 1 8000 15 42 00 15 52 00 B0850+054 08 56 26 52.3 181.3 0.1 1.0 -4 1 4 8000 15 52 00 16 02 00 --- 09 06 28 52.2 185.4 0.2 4.0 596 R 1 0 15 52 00 Schedule for VLBA_HN (Code Hn ) 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 09 08 28 67.0 188.0 0.2 6.3 84 1 5 0 16 04 00 16 08 00 =0851+202 09 12 29 66.9 190.4 0.3 8.1 240 F 1 3200 16 04 08 16 08 00 J0909+0121 09 12 29 48.4 181.1 0.1 0.8 -43 1 5 3200 16 08 00 16 11 00 =0906+015 09 15 29 48.4 182.3 0.1 1.7 137 F 1 5600 16 08 00 16 11 00 B0850+054 09 15 29 52.0 189.1 0.4 6.6 -13 1 5 5600 16 11 00 16 18 30 --- 09 23 01 51.7 192.1 0.5 8.8 437 F 1 11600 16 11 00 16 18 30 B0850+054 09 23 01 51.7 192.1 0.5 8.8 -4 1 5 11600 16 18 30 16 26 00 --- 09 30 32 51.4 195.0 0.6 11.0 446 F 1 17600 16 18 30 16 26 00 J0909+0121 09 30 32 48.1 187.9 0.4 5.8 -13 1 6 17600 16 26 00 16 28 30 =0906+015 09 33 02 48.1 188.8 0.4 6.5 137 R 1 15600 16 26 00 16 28 30 B0850+054 09 33 02 51.3 196.0 0.7 11.7 -12 1 6 15600 16 28 30 16 38 10 --- 09 42 44 50.7 199.7 0.8 14.4 568 R 1 7867 16 28 30 16 38 10 B0850+054 09 42 44 50.7 199.7 0.8 14.4 -4 1 6 7867 16 38 10 16 47 50 --- 09 52 25 50.1 203.4 1.0 17.0 576 R 1 133 16 38 10 16 47 50 B0850+054 09 52 25 50.1 203.4 1.0 17.0 -4 1 7 133 16 47 50 17 00 00 --- 10 04 37 49.1 207.8 1.2 20.1 726 F 1 9867 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: 3 Station: VLBA_HN 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: 3 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