COVER INFORMATION Station: VLBA_HN (Code Hn ) Experiment: M87 multi-epoch at 90cm Exp. Code: BJ046R 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_HN (Code Hn ) 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) ---------------------------------------------------------------------------------------- --- Fri 23 Apr 2004 Day 114 --- 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 01 06 47 3C147 10 24 32 42.8 -55.8 4.7 70.0 0 1 1 0 01 06 27 01 11 46 --- 10 29 32 42.0 -55.4 4.8 69.3 299 F 1 2128 01 14 11 1148-001 10 31 57 43.2 152.4 -1.3 -19.8 0 1 1 2128 01 13 51 01 19 10 --- 10 36 57 43.6 154.0 -1.2 -18.7 299 F 1 4256 01 20 10 3C274 10 37 57 50.9 132.8 -1.9 -33.3 39 1 1 4256 01 19 50 01 50 05 --- 11 07 57 54.5 143.3 -1.4 -26.6 1795 F 1 16356 01 51 05 3C274 11 08 57 54.7 143.7 -1.4 -26.3 54 1 2 16356 01 50 45 02 21 00 --- 11 38 57 57.4 155.9 -0.9 -17.8 1795 R 1 6743 02 23 05 3C147 11 41 02 31.6 310.8 6.0 59.3 16 1 2 6743 02 22 45 02 28 04 --- 11 46 02 30.9 311.3 6.1 58.6 299 R 1 4615 02 30 19 1148-001 11 48 18 46.6 179.0 0.0 -0.7 41 1 2 4615 02 29 59 02 35 19 --- 11 53 18 46.6 180.9 0.0 0.6 299 R 1 2487 02 36 18 3C274 11 54 18 58.4 162.7 -0.6 -12.9 30 1 3 2487 02 35 58 03 06 13 --- 12 24 18 59.4 176.8 -0.1 -2.4 1795 F 1 9613 03 07 13 3C274 12 25 18 59.4 177.2 -0.1 -2.1 54 1 4 9613 03 06 53 03 37 08 --- 12 55 18 59.0 191.5 0.4 8.6 1795 R 1 13486 03 39 12 3C147 12 57 21 21.7 318.9 7.2 48.3 32 1 4 13486 03 38 52 03 44 11 --- 13 02 21 21.1 319.5 7.3 47.6 299 R 1 11358 03 46 33 1148-001 13 04 44 43.6 205.9 1.2 18.7 60 1 4 11358 03 46 13 03 51 32 --- 13 09 44 43.2 207.5 1.3 19.8 299 R 1 9231 03 52 32 3C274 13 10 44 58.2 198.6 0.7 13.9 24 1 5 9231 03 52 12 04 22 27 --- 13 40 44 55.9 211.5 1.2 23.0 1795 F 1 2870 04 23 27 3C274 13 41 44 55.8 211.9 1.2 23.3 54 1 5 2870 04 23 07 04 53 22 --- 14 11 44 52.5 223.0 1.7 30.7 1795 F 1 14971 04 55 24 3C147 14 13 46 13.4 328.4 8.5 36.5 38 1 5 14971 04 55 04 05 00 23 --- 14 18 46 12.9 329.0 8.6 35.7 299 F 1 17099 Schedule for VLBA_HN (Code Hn ) 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) ---------------------------------------------------------------------------------------- --- Fri 23 Apr 2004 Day 114 --- 05 02 07 1148-001 14 20 30 35.2 228.0 2.5 33.0 31 1 6 17099 05 01 47 05 07 06 --- 14 25 30 34.5 229.3 2.6 33.7 299 R 1 15974 05 08 06 3C274 14 26 30 50.6 227.9 1.9 33.8 22 1 6 15974 05 07 46 05 38 01 --- 14 56 30 46.2 236.8 2.4 38.8 1795 R 1 3873 05 39 01 3C274 14 57 30 46.0 237.1 2.4 39.0 54 1 7 3873 05 38 41 06 08 56 --- 15 27 30 41.2 244.7 2.9 42.7 1795 F 1 8228 06 17 52 1148-001 15 36 28 23.6 245.3 3.8 41.7 495 1 7 8228 06 17 32 06 22 52 --- 15 41 28 22.8 246.3 3.8 42.1 299 F 1 10355 06 23 51 3C274 15 42 28 38.7 248.2 3.2 44.1 22 1 8 10355 06 23 31 06 53 47 --- 16 12 28 33.5 254.6 3.7 46.3 1795 R 1 12744 06 54 46 3C274 16 13 28 33.4 254.8 3.7 46.3 54 1 8 12744 06 54 26 07 24 41 --- 16 43 28 28.0 260.6 4.2 47.7 1795 R 1 643 07 31 40 3C274 16 50 28 26.7 261.9 4.3 47.9 410 1 9 643 07 31 20 08 01 35 --- 17 20 28 21.3 267.2 4.8 48.5 1795 F 1 11457 08 02 35 3C274 17 21 28 21.1 267.4 4.8 48.5 54 1 10 11457 08 02 15 08 32 30 --- 17 51 28 15.6 272.5 5.3 48.5 1795 R 1 11642 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 53.750745 0538+498 49 49 42.83693 * 49 51 07.23356 49 51 27.34268 * 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 57.374585 * 1148-001 -00 07 13.16375 *-00 23 54.20490 -00 25 22.18793 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 03.018611 1228+126 12 40 01.74911 * 12 23 28.04393 12 22 01.61467 * 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 57.8 1148-001 144.6 3C274 145.8 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