COVER INFORMATION Station: VLBA_FD (Code Fd ) Experiment: M87 multi-epoch at 90cm Exp. Code: BJ046A Schedule Version: 1.00 Processed by SCHED version: Release of 18 Sept. 2003 PI: Bill Junor Address: ISR-1, Space & Atmospheric Sciences MS D466, LANL, P.O. Box 1663 Los Alamos, New Mexico, 87545 U.S.A. Phone: 505 667 0788 EMAIL: bjunor@lanl.gov Fax: 505 665 7395 Phone during observation: 505 699 7692 Observing mode: 90cm 128-4-2 Notes: COVER LETTER: BJ046 SUMMARY: This project needs about 100 hours times 45 baselines to meet the sensitivity requirements. This time can be accumulated in many separated sessions. One session should be a full track with all antennas to set the calibration and ensure full uv coverage. The other sessions can involve as little as 2 hours and as few as 6 antennas. The sessions can be run as filler in gaps between other projects. This project can be run prior to Feb 1, 2004, to accumulate test data on baselines to MK. These test observations need not be long --- 2--4 hours but should include 3C147, 1148-001 and 3C274. Tropospheric weather is not a problem. The ionosphere will have a bigger impact. 3C274 is mostly a night-time object now. -------------------------------------------------------------------- Here is the official dynamic scheduling sheet: ================================================================ Preferred Dynamic Contraints. Alter [defaults] as desired. ================================================================ Equipment constraints: Stations. Below each station code, the "o" indicates an [optional] station that is to be used if it is available. Change "o" to "r" if the station is required or change "o" to "n" if the station is not to be used. SC HN NL FD LA PT KP OV BR MK o o o o o o o o o r Minimum number of stations [6]: May we swap PT for a single VLA antenna? [yes] Consult http://www.aoc.nrao.edu/~gtaylor/y1gotcha.html to decide. If you adopt the default, then both PT and VLA1 must be in the stations list in the keyin file. Bands and polarizations. Below each band code, insert "R" if the righthand polarization is to be used, "L" if the lefthand polarization is to be used, "d" if dual polarizations are to be used, or "o" if the band is in your setups but scheduling should not be constrained by its availability. 90cm 50cm 20cm 13cm 6cm 4cm 2cm 1cm 7mm 3mm d Weather constraints: [appropriate for bands marked "L", "R", or "d" above and for at least the minimum number of stations] Date constraints: Preferred date(s), usually a series start [none]: No earlier than Jan 15, 2004. Excluded dates plus reason [none]: Too close to Sun. Preferred interval between segments in days [none]: Special conditions (e.g., a series with different spacings in time) [See the comments at the top.]: Schedule for VLBA_FD (Code Fd ) Page 2 M87 multi-epoch at 90cm 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) ---------------------------------------------------------------------------------------- --- Sat 3 Jan 2004 Day 3 --- Next scan frequencies: 324.49 324.49 332.49 332.49 Next BBC frequencies: 824.49 824.49 832.49 832.49 Next scan bandwidths: 8.00 8.00 8.00 8.00 06 53 28 3C147 06 46 42 67.4 -27.4 1.1 142.1 0 1 1 0 06 53 08 06 58 27 --- 06 51 42 66.8 -29.0 1.1 139.7 299 F 1 2128 07 00 27 3C147 06 53 42 66.6 -29.6 1.2 138.7 114 1 1 2128 07 00 07 07 05 26 --- 06 58 42 66.1 -31.1 1.3 136.4 299 F 1 4256 07 07 26 3C147 07 00 42 65.9 -31.7 1.3 135.5 114 1 1 4256 07 07 06 07 12 25 --- 07 05 42 65.3 -33.0 1.4 133.3 299 F 1 6384 07 14 38 1148-001 07 07 55 16.3 100.5 -4.7 -57.8 29 1 1 6384 07 14 18 07 19 37 --- 07 12 55 17.3 101.2 -4.6 -57.6 299 F 1 8511 07 20 37 3C274 07 13 55 15.4 84.5 -5.3 -61.3 43 1 2 8511 07 20 17 07 50 32 --- 07 43 55 21.8 88.2 -4.8 -61.7 1795 R 1 14588 07 51 32 3C274 07 44 55 22.1 88.4 -4.8 -61.7 54 1 2 14588 07 51 12 08 21 27 --- 08 14 55 28.5 92.2 -4.3 -61.7 1795 R 1 2487 08 23 30 3C147 08 16 59 55.4 -45.1 2.6 109.2 26 1 2 2487 08 23 10 08 28 30 --- 08 21 59 54.7 -45.5 2.7 107.8 299 R 1 360 08 30 41 1148-001 08 24 11 32.0 112.3 -3.4 -52.7 20 1 3 360 08 30 21 08 35 40 --- 08 29 11 33.0 113.2 -3.4 -52.3 299 F 1 2487 08 36 40 3C274 08 30 11 31.8 94.3 -4.0 -61.5 41 1 3 2487 08 36 20 09 06 35 --- 09 00 11 38.2 98.6 -3.5 -60.6 1795 F 1 14588 09 07 35 3C274 09 01 11 38.4 98.7 -3.5 -60.5 54 1 4 14588 09 07 15 09 37 30 --- 09 31 11 44.7 103.7 -3.0 -58.9 1795 R 1 8511 09 39 35 3C147 09 33 16 43.4 -48.5 3.8 91.9 18 1 4 8511 09 39 15 09 44 34 --- 09 38 16 42.6 -48.5 3.9 90.9 299 R 1 6384 09 46 50 1148-001 09 40 32 46.1 129.0 -2.2 -42.0 11 1 4 6384 09 46 30 09 51 49 --- 09 45 32 47.0 130.3 -2.1 -41.0 299 R 1 4256 09 52 49 3C274 09 46 32 47.9 106.5 -2.7 -57.6 38 1 5 4256 09 52 29 10 22 44 --- 10 16 32 54.0 113.1 -2.2 -54.1 1795 F 1 7845 Schedule for VLBA_FD (Code Fd ) Page 3 M87 multi-epoch at 90cm 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) ---------------------------------------------------------------------------------------- --- Sat 3 Jan 2004 Day 3 --- 10 23 44 3C274 10 17 32 54.2 113.3 -2.2 -54.0 54 1 6 7845 10 23 24 10 53 39 --- 10 47 32 59.9 121.7 -1.7 -48.5 1795 R 1 15255 10 55 42 3C147 10 49 35 31.2 -47.1 5.1 78.1 5 1 6 15255 10 55 22 11 00 41 --- 10 54 35 30.4 -46.9 5.2 77.2 299 R 1 13127 11 03 03 1148-001 10 56 58 56.4 155.1 -0.9 -21.3 2 1 6 13127 11 02 43 11 08 02 --- 11 01 58 56.8 157.2 -0.8 -19.5 299 R 1 10999 11 09 02 3C274 11 02 58 62.7 127.1 -1.5 -44.6 34 1 7 10999 11 08 42 11 38 57 --- 11 32 58 67.3 140.6 -1.0 -34.0 1795 F 1 1102 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: bw051.set Matches group v5090n 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= -500.00 -500.00 -500.00 -500.00 Net SB= U U U U Pol. = RCP LCP RCP LCP BBC = 1 2 3 4 BBC SB= U U U U IF = B D B D VLBA FE= omit 90cm omit 90cm VLBA Synth= 15.4 15.4 15.4 The following frequency sets based on this setup were used. Frequency Set: 1 Setup file default. Used pcal sets: 1 LO sum= 324.49 324.49 332.49 332.49 BBC fr= 824.49 824.49 832.49 832.49 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 -- M87 multi-epoch at 90cm 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) J0542+4951 05 38 43.517539 * 05 42 36.137917 05 42 55.691358 0538+498 49 49 42.83693 * 49 51 07.23356 49 51 21.68021 * 3C147 /home/filehost/cwalker/sched/catalogs/sources.vlba J0542+49 ICRF - Ext.1 Source - 1998 IERS Annual Report J1150-0023 11 48 10.124953 * 11 50 43.870762 11 50 55.763166 * 1148-001 -00 07 13.16375 *-00 23 54.20490 -00 25 10.97404 J1150-00 /home/filehost/cwalker/sched/catalogs/sources.vlba ICRF - Ext.1 Source - 1998 IERS Annual Report J1230+1223 12 28 17.569280 * 12 30 49.423382 12 31 01.016663 1228+126 12 40 01.74911 * 12 23 28.04393 12 22 06.36554 * 3C274 /home/filehost/cwalker/sched/catalogs/sources.vlba J1230+12 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) 3C147 149.7 1148-001 104.2 3C274 99.9 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