COVER INFORMATION Station: VLBA_MK (Code Mk ) Experiment: be034b; 2/8 GHz observations of J2257-364 Exp. Code: be034b Schedule Version: 1.00 Processed by SCHED version: Release of 18 Sept. 2003 PI: Philip Edwards Address: Institute of Space and Astronautical Science 3-1-1 Yoshinodai, Sagamihara Kanagawa 229-8510 Japan Phone: +81-42-759-8342 EMAIL: pge@vsop.isas.ac.jp Fax: +81-42-759-8485 Phone during observation: +81-42-759-8342 Observing mode: 128-4-2 at 2cm Notes: Fringe finder J2258-27 Second epoch of two 6.0 hrs dynamically scheduled centered at LST 23.0 Schedule for VLBA_MK (Code Mk ) Page 2 be034b; 2/8 GHz observations of J2257-364 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). 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) ---------------------------------------------------------------------------------------- --- Thu 11 Dec 2003 Day 345 --- Next scan frequencies: 2262.49 2270.49 8412.49 8420.49 Next BBC frequencies: 837.51 829.51 812.49 820.49 Next scan bandwidths: 8.00 8.00 8.00 8.00 23 53 21 J2258-27 18 52 39 13.8 127.0 -4.1 -58.3 0 1 1 0 23 53 21 23 57 20 --- 18 56 39 14.6 127.5 -4.0 -57.7 239 F 1 1596 --- Start: Thu 11 Dec 2003 Day 345 -- Stop: Fri 12 Dec 2003 Day 346 --- 23 57 50 J2257-364 18 57 09 10.2 134.9 -4.0 -55.9 15 1 1 1596 23 57 50 00 11 18 --- 19 10 39 12.4 136.5 -3.8 -53.6 808 F 1 6981 00 11 18 J2257-364 19 10 39 12.4 136.5 -3.8 -53.6 -4 1 1 6981 00 11 18 00 31 15 --- 19 30 39 15.5 139.1 -3.4 -50.0 1193 F 1 14959 00 31 15 J2257-364 19 30 39 15.5 139.1 -3.4 -50.0 -4 1 2 14959 00 31 15 00 51 12 --- 19 50 39 18.5 141.9 -3.1 -46.2 1193 R 1 12263 00 51 12 J2257-364 19 50 39 18.5 141.9 -3.1 -46.2 -4 1 2 12263 00 51 12 01 11 08 --- 20 10 39 21.3 144.9 -2.8 -42.2 1193 R 1 4285 01 11 08 J2257-364 20 10 39 21.3 144.9 -2.8 -42.2 -4 1 3 4285 01 11 08 01 31 05 --- 20 30 39 23.9 148.3 -2.4 -37.9 1193 F 1 3694 01 31 05 J2257-364 20 30 39 23.9 148.3 -2.4 -37.9 -4 1 3 3694 01 31 05 01 45 03 --- 20 44 39 25.6 150.8 -2.2 -34.8 834 F 1 9278 01 47 02 J2258-27 20 46 39 32.6 145.3 -2.2 -37.4 100 1 3 9278 01 47 02 01 51 02 --- 20 50 39 33.1 146.1 -2.1 -36.4 239 F 1 10874 01 51 32 J2257-364 20 51 09 26.3 152.0 -2.1 -33.3 10 1 4 10874 01 51 32 02 11 28 --- 21 11 09 28.4 155.9 -1.8 -28.6 1197 R 1 16348 02 11 28 J2257-364 21 11 09 28.4 155.9 -1.8 -28.6 -4 1 4 16348 02 11 28 02 31 25 --- 21 31 09 30.2 160.0 -1.4 -23.6 1193 R 1 8370 02 31 25 J2257-364 21 31 09 30.2 160.0 -1.4 -23.6 -4 1 4 8370 02 31 25 02 44 53 --- 21 44 39 31.2 162.9 -1.2 -20.1 804 R 1 2985 02 46 53 J2258-27 21 46 39 39.2 159.5 -1.2 -21.9 98 1 4 2985 02 46 53 02 50 52 --- 21 50 39 39.5 160.5 -1.1 -20.8 239 R 1 1389 Schedule for VLBA_MK (Code Mk ) Page 3 be034b; 2/8 GHz observations of J2257-364 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). 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) ---------------------------------------------------------------------------------------- --- Fri 12 Dec 2003 Day 346 --- 02 51 22 J2257-364 21 51 09 31.6 164.4 -1.1 -18.4 8 1 5 1389 02 51 22 03 11 19 --- 22 11 09 32.7 169.0 -0.8 -12.9 1197 F 1 6589 03 11 19 J2257-364 22 11 09 32.7 169.0 -0.8 -12.9 -4 1 5 6589 03 11 19 03 31 15 --- 22 31 09 33.4 173.7 -0.4 -7.4 1193 F 1 14567 03 31 15 J2257-364 22 31 09 33.4 173.7 -0.4 -7.4 -4 1 6 14567 03 31 15 03 44 43 --- 22 44 39 33.7 176.9 -0.2 -3.6 804 R 1 15247 03 46 43 J2258-27 22 46 39 42.2 176.5 -0.2 -3.7 97 1 6 15247 03 46 43 03 50 42 --- 22 50 39 42.2 177.7 -0.1 -2.4 239 R 1 13652 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/vsx-128-4-2-R.set Matches group vsx_22 in /home/filehost/cwalker/sched/catalogs/freq.dat Setup group: 1 Station: VLBA Total bit rate: 128 Format: VLBA1:4 Bits per sample: 2 Sample rate: 16.000 Number of channels: 4 Passes/head pos: 1 Speedup factor: 2.00 Tape speeds: Low density - 133.330 ips, High density - 80.00 ips Time per pass for 17600 ft, High density tapes is: 00:44:00 1st LO= 3100.00 3100.00 7600.00 7600.00 Net SB= U U U U Pol. = RCP RCP RCP RCP BBC = 1 2 3 4 BBC SB= L L U U IF = A A B B VLBA FE= 13cm 4cm 13cm 4cm VLBA Synth= 7.6 3.1 15.4 The following frequency sets based on this setup were used. Frequency Set: 1 Setup file default. Used pcal sets: 1 LO sum= 2262.49 2270.49 8412.49 8420.49 BBC fr= 837.51 829.51 812.49 820.49 Bandwd= 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 S1 S3 S1 S2 S3 S4 PCALXB2= S2 S4 S2 S4 M1 M2 M3 M4 PCALFR1= 510 510 6510 6510 0 0 0 0 PCALFR2= 510 510 6510 6510 0 0 0 0 Track assignments are: track1= 2, 18, 3, 19 barrel=roll_auto SOURCE LIST -- be034b; 2/8 GHz observations of J2257-364 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). Source Source position (RA/Dec) (B1950) (J2000) (Date) * J2257-364 22 54 23.115930 * 22 57 10.614100 22 57 22.989691 -36 43 46.95984 *-36 27 43.71000 -36 26 45.18796 From catalog imbedded in main SCHED input file. J2258-2758 22 55 22.460655 * 22 58 05.962888 22 58 18.002449 2255-282 -28 14 25.61877 *-27 58 21.25675 -27 57 19.93893 * J2258-27 /home/filehost/cwalker/sched/catalogs/sources.vlba ICRF - Ext.1 Source - 1998 IERS Annual Report 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) J2257-364 73.3 J2258-27 76.0 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