COVER INFORMATION Station: VLBA_NL (Code Nl ) Experiment: M87 multi-epoch at 90cm Exp. Code: BJ046Q 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_NL (Code Nl ) 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) ---------------------------------------------------------------------------------------- --- Thu 22 Apr 2004 Day 113 --- 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 40 38 3C147 09 36 11 49.6 -57.9 3.9 78.4 0 1 1 0 01 40 18 01 45 37 --- 09 41 11 48.8 -57.6 4.0 77.7 299 F 1 2128 01 48 07 1148-001 09 43 41 39.0 137.3 -2.1 -30.4 14 1 1 2128 01 47 47 01 53 06 --- 09 48 41 39.6 138.7 -2.0 -29.5 299 F 1 4256 01 54 06 3C274 09 49 41 44.3 118.0 -2.7 -42.4 40 1 1 4256 01 53 46 02 24 01 --- 10 19 41 49.0 126.1 -2.2 -38.1 1795 F 1 16356 02 25 01 3C274 10 20 41 49.2 126.4 -2.2 -37.9 54 1 2 16356 02 24 41 02 54 56 --- 10 50 41 53.4 136.0 -1.7 -32.0 1795 R 1 6743 02 57 01 3C147 10 52 46 37.8 307.2 5.2 67.2 5 1 2 6743 02 56 41 03 02 00 --- 10 57 46 37.1 307.6 5.2 66.5 299 R 1 4615 03 04 19 1148-001 11 00 05 46.3 161.4 -0.8 -13.7 35 1 2 4615 03 03 59 03 09 18 --- 11 05 05 46.6 163.2 -0.8 -12.5 299 R 1 2487 03 10 18 3C274 11 06 05 55.3 141.6 -1.4 -28.3 36 1 3 2487 03 09 58 03 40 13 --- 11 36 05 58.2 153.8 -0.9 -19.7 1795 F 1 9613 03 41 13 3C274 11 37 05 58.3 154.3 -0.9 -19.4 54 1 4 9613 03 40 53 04 11 08 --- 12 07 05 60.1 168.2 -0.4 -9.0 1795 R 1 13486 04 13 13 3C147 12 09 11 27.0 314.0 6.4 56.3 23 1 4 13486 04 12 53 04 18 13 --- 12 14 11 26.3 314.5 6.5 55.5 299 R 1 11358 04 20 41 1148-001 12 16 40 47.4 189.5 0.4 7.1 59 1 4 11358 04 20 21 04 25 41 --- 12 21 40 47.2 191.3 0.5 8.4 299 R 1 9231 04 26 40 3C274 12 22 40 60.5 175.8 -0.1 -3.2 27 1 5 9231 04 26 20 04 56 35 --- 12 52 40 60.2 190.7 0.4 8.1 1795 F 1 2870 04 57 35 3C274 12 53 40 60.2 191.2 0.4 8.5 54 1 5 2870 04 57 15 05 27 30 --- 13 23 40 58.4 205.1 0.9 18.9 1795 F 1 14971 05 29 30 3C147 13 25 40 17.5 322.5 7.7 44.8 32 1 5 14971 05 29 10 05 34 29 --- 13 30 40 16.9 323.1 7.8 44.0 299 F 1 17099 Schedule for VLBA_NL (Code Nl ) 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) ---------------------------------------------------------------------------------------- --- Thu 22 Apr 2004 Day 113 --- 05 36 18 1148-001 13 32 30 42.0 215.2 1.7 25.5 31 1 6 17099 05 35 58 05 41 18 --- 13 37 30 41.4 216.7 1.8 26.5 299 R 1 15974 05 42 17 3C274 13 38 30 57.1 211.5 1.1 23.5 22 1 6 15974 05 41 57 06 12 13 --- 14 08 30 53.7 222.9 1.6 31.3 1795 R 1 3873 06 13 12 3C274 14 09 30 53.6 223.3 1.6 31.6 54 1 7 3873 06 12 52 06 43 08 --- 14 39 30 49.4 233.0 2.1 37.6 1795 F 1 8228 06 44 07 1148-001 14 40 30 33.1 233.6 2.8 36.9 21 1 7 8228 06 43 47 06 49 07 --- 14 45 30 32.3 234.8 2.9 37.5 299 F 1 10355 06 50 06 3C274 14 46 30 48.4 235.0 2.3 38.7 22 1 8 10355 06 49 46 07 20 01 --- 15 16 30 43.6 243.0 2.8 42.9 1795 R 1 12744 07 21 01 3C274 15 17 30 43.4 243.3 2.8 43.0 54 1 8 12744 07 20 41 07 50 56 --- 15 47 30 38.3 250.2 3.3 45.9 1795 R 1 643 07 51 56 1148-001 15 48 30 22.0 248.2 4.0 43.8 21 1 9 643 07 51 36 07 56 55 --- 15 53 30 21.1 249.1 4.0 44.2 299 F 1 1484 07 57 55 3C274 15 54 30 37.0 251.7 3.4 46.5 22 1 9 1484 07 57 35 08 27 50 --- 16 24 30 31.7 257.7 3.9 48.2 1795 F 1 13585 08 28 50 3C274 16 25 30 31.5 257.9 3.9 48.3 54 1 10 13585 08 28 30 08 58 45 --- 16 55 30 26.0 263.4 4.4 49.3 1795 R 1 9514 09 05 44 3C274 17 02 30 24.7 264.6 4.5 49.5 410 1 11 9514 09 05 24 09 35 39 --- 17 32 30 19.1 269.7 5.0 49.8 1795 F 1 2586 09 36 39 3C274 17 33 30 18.9 269.9 5.0 49.8 54 1 11 2586 09 36 19 10 06 34 --- 18 03 30 13.3 274.8 5.5 49.5 1795 F 1 14687 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 53.762850 0538+498 49 49 42.83693 * 49 51 07.23356 49 51 27.48417 * 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 57.376175 * 1148-001 -00 07 13.16375 *-00 23 54.20490 -00 25 22.18960 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 03.017828 1228+126 12 40 01.74911 * 12 23 28.04393 12 22 01.53782 * 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 58.7 1148-001 145.6 3C274 146.7 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