COVER INFORMATION Station: VLBA_MK (Code Mk ) Experiment: Something Interesting is Happening in NGC4258 Exp. Code: BG145C Schedule Version: 1.00 Processed by SCHED version: Release of 18 Sept. 2003 PI: Lincoln J. Greenhill Address: Harvard-Smithsonian CfA, MS 42 60 Garden St Cambridge, MA 02138 USA Phone: 617 495 7194 EMAIL: lincoln@cfa.harvard.edu Fax: 617 495 7345 Phone during observation: 617 851 8918 Observing mode: 128-8-2 1.3 cm Notes: PULSE CAL OFF AT ALL STATIONS. Suitable for dynamic scheduling. VLBA 12h track centered at 12:30 LST (VLBA_PT). All VLBA stations requested. Track must start/stop w/ cal scan. Schedule for VLBA_MK (Code Mk ) Page 2 Something Interesting is Happening in NGC4258 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 28 Feb 2004 Day 59 --- Next scan frequencies: 22207.78 22207.78 22197.40 22197.40 22126.42 22126.42 22111.59 22111.59 Next BBC frequencies: 707.78 707.78 697.40 697.40 626.42 626.42 611.59 611.59 Next scan bandwidths: 4.00 4.00 4.00 4.00 4.00 4.00 4.00 4.00 03 18 16 4C39.25 03 25 39 12.0 52.6 -6.0 -74.1 0 1 1 0 03 18 16 03 23 16 --- 03 30 40 12.9 52.9 -5.9 -74.9 300 F 1 2001 04 08 16 4C39.25 04 15 47 21.5 54.7 -5.2 -81.4 2676 1 1 2001 04 08 16 04 13 16 --- 04 20 48 22.5 54.9 -5.1 -82.1 300 F 1 4002 04 34 16 NGC4258 04 41 51 -0.8 38.2 -7.6 D -59.0 1213 1 1 4002 04 34 16 04 56 16 --- 05 03 55 2.5 40.0 -7.3 -63.1 0 F 1 12805 04 58 16 4C39.25 05 05 55 31.2 55.6 -4.4 -88.9 56 1 1 12805 04 58 16 05 03 16 --- 05 10 56 32.2 55.7 -4.3 -89.7 300 F 1 14806 05 05 16 NGC4258 05 12 56 3.8 40.7 -7.1 -64.7 57 1 2 14806 05 05 16 05 22 16 --- 05 29 59 6.5 41.8 -6.8 -67.7 1020 R 1 13592 05 24 15 NGC4258 05 31 59 6.8 42.0 -6.8 -68.0 113 1 2 13592 05 24 15 05 46 16 --- 05 54 03 10.3 43.3 -6.4 -71.9 1320 R 1 4790 05 48 16 4C39.25 05 56 03 40.9 55.0 -3.5 -97.2 52 1 2 4790 05 48 16 05 53 16 --- 06 01 04 41.9 54.8 -3.4 -98.1 300 R 1 2789 05 55 15 NGC4258 06 03 04 11.8 43.7 -6.3 -73.5 53 1 3 2789 05 55 15 06 12 16 --- 06 20 07 14.6 44.5 -6.0 -76.4 1020 F 1 4013 06 14 15 NGC4258 06 22 07 14.9 44.6 -6.0 -76.8 113 1 3 4013 06 14 15 06 36 16 --- 06 44 11 18.6 45.4 -5.6 -80.6 1320 F 1 12815 06 38 15 4C39.25 06 46 11 50.4 52.1 -2.7 -107.2 50 1 3 12815 06 38 15 06 43 15 --- 06 51 12 51.4 51.6 -2.6 -108.4 300 F 1 14816 06 45 15 NGC4258 06 53 12 20.1 45.6 -5.4 -82.2 51 1 4 14816 06 45 15 07 02 15 --- 07 10 15 23.0 45.9 -5.1 -85.2 1020 R 1 13582 07 04 15 NGC4258 07 12 15 23.3 46.0 -5.1 -85.6 113 1 4 13582 07 04 15 07 26 15 --- 07 34 19 27.0 46.1 -4.7 -89.5 1320 R 1 4780 Schedule for VLBA_MK (Code Mk ) Page 3 Something Interesting is Happening in NGC4258 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 28 Feb 2004 Day 59 --- 07 28 15 4C39.25 07 36 19 59.3 45.2 -1.9 -120.8 49 1 4 4780 07 28 15 07 33 15 --- 07 41 20 60.2 44.2 -1.8 -122.5 300 R 1 2778 07 35 15 NGC4258 07 43 20 28.6 46.1 -4.6 -91.2 50 1 5 2778 07 35 15 07 52 15 --- 08 00 23 31.4 46.0 -4.3 -94.4 1020 F 1 4023 07 54 15 NGC4258 08 02 23 31.8 45.9 -4.3 -94.8 113 1 5 4023 07 54 15 08 16 15 --- 08 24 27 35.5 45.4 -3.9 -99.1 1320 F 1 12825 08 19 15 1308+326 08 27 27 26.3 62.9 -4.7 -82.3 155 1 5 12825 08 19 15 08 24 15 --- 08 32 28 27.3 63.0 -4.6 -82.9 300 F 1 14827 08 27 14 NGC4258 08 35 28 37.3 45.0 -3.7 -101.4 153 1 6 14827 08 27 14 08 44 15 --- 08 52 31 40.1 44.1 -3.4 -105.1 1020 R 1 13572 08 46 14 NGC4258 08 54 31 40.5 44.0 -3.4 -105.5 113 1 6 13572 08 46 14 09 08 15 --- 09 16 35 44.0 42.4 -3.0 -110.6 1320 R 1 4769 09 11 14 1308+326 09 19 35 37.2 63.9 -3.9 -88.7 159 1 6 4769 09 11 14 09 16 14 --- 09 24 36 38.3 63.9 -3.8 -89.4 300 R 1 2768 09 19 14 NGC4258 09 27 36 45.8 41.5 -2.9 -113.4 159 1 7 2768 09 19 14 09 36 14 --- 09 44 39 48.4 39.6 -2.6 -117.8 1020 F 1 4033 09 38 14 NGC4258 09 46 39 48.7 39.4 -2.5 -118.4 113 1 7 4033 09 38 14 10 00 14 --- 10 08 43 51.9 36.3 -2.2 -124.8 1320 F 1 12836 10 03 14 1308+326 10 11 43 48.2 63.3 -3.0 -96.1 156 1 7 12836 10 03 14 10 08 14 --- 10 16 44 49.3 63.1 -2.9 -96.9 300 F 1 14837 10 11 13 NGC4258 10 19 44 53.4 34.5 -2.0 -128.3 154 1 8 14837 10 11 13 10 28 14 --- 10 36 47 55.5 31.2 -1.7 -134.1 1020 R 1 13562 10 30 13 NGC4258 10 38 47 55.8 30.8 -1.7 -134.8 114 1 8 13562 10 30 13 10 52 14 --- 11 00 51 58.2 25.6 -1.3 -143.2 1320 R 1 4759 10 55 13 1308+326 11 03 51 59.0 59.7 -2.1 -106.0 151 1 8 4759 10 55 13 11 00 13 --- 11 08 52 60.1 59.1 -2.0 -107.2 300 R 1 2758 11 03 13 NGC4258 11 11 52 59.3 22.6 -1.1 -147.8 149 1 9 2758 11 03 13 11 20 13 --- 11 28 55 60.7 17.5 -0.8 -155.3 1020 F 1 4043 Schedule for VLBA_MK (Code Mk ) Page 4 Something Interesting is Happening in NGC4258 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 28 Feb 2004 Day 59 --- 11 22 13 NGC4258 11 30 55 60.8 16.9 -0.8 -156.2 114 1 9 4043 11 22 13 11 44 13 --- 11 52 59 62.0 9.5 -0.4 -166.8 1320 F 1 12846 11 46 13 1308+326 11 54 59 68.9 49.7 -1.3 -121.9 87 1 9 12846 11 46 13 11 51 13 --- 12 00 00 69.8 48.1 -1.2 -124.1 300 F 1 14847 11 53 13 NGC4258 12 02 00 62.3 6.3 -0.3 -171.3 86 1 10 14847 11 53 13 12 10 13 --- 12 19 03 62.5 0.0 0.0 -179.9 1020 R 1 13551 12 12 12 NGC4258 12 21 03 62.5 -0.7 0.0 179.0 114 1 10 13551 12 12 12 12 34 13 --- 12 43 07 62.1 -8.7 0.4 167.9 1320 R 1 4749 12 36 13 1308+326 12 45 07 76.2 23.3 -0.4 -153.9 85 1 10 4749 12 36 13 12 41 13 --- 12 50 08 76.7 19.1 -0.3 -158.6 300 R 1 2748 12 43 12 NGC4258 12 52 08 61.7 -11.8 0.5 163.5 84 1 11 2748 12 43 12 13 00 13 --- 13 09 11 60.7 -17.5 0.8 155.4 1020 F 1 4054 13 02 12 NGC4258 13 11 11 60.6 -18.1 0.9 154.5 114 1 11 4054 13 02 12 13 24 13 --- 13 33 15 58.7 -24.5 1.2 144.9 1320 F 1 12856 13 26 12 1308+326 13 35 15 76.3 -22.5 0.4 154.8 78 1 11 12856 13 26 12 13 31 12 --- 13 40 16 75.8 -26.4 0.5 150.3 300 F 1 14857 13 33 12 NGC4258 13 42 16 57.7 -26.8 1.4 141.3 77 1 12 14857 13 33 12 13 50 12 --- 13 59 19 55.8 -30.7 1.7 134.9 1020 R 1 13541 13 52 12 NGC4258 14 01 19 55.6 -31.1 1.7 134.2 114 1 12 13541 13 52 12 14 14 12 --- 14 23 23 52.7 -35.3 2.1 126.7 1320 R 1 4739 14 16 12 1308+326 14 25 23 69.1 -49.4 1.2 122.3 81 1 12 4739 14 16 12 14 21 12 --- 14 30 24 68.2 -50.9 1.3 120.2 300 R 1 2737 14 23 12 NGC4258 14 32 24 51.5 -36.7 2.2 124.0 80 1 13 2737 14 23 12 14 40 12 --- 14 49 27 49.0 -39.1 2.5 119.0 1020 F 1 4064 14 42 12 NGC4258 14 51 27 48.7 -39.3 2.5 118.5 113 1 13 4064 14 42 12 14 59 12 --- 15 08 30 46.1 -41.2 2.8 113.9 1020 F 1 10865 15 01 12 1308+326 15 10 30 60.5 -58.9 2.0 107.7 85 1 13 10865 15 01 12 15 06 12 --- 15 15 31 59.4 -59.5 2.1 106.5 300 F 1 12866 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: bg145.set Matches group v1cm_a4 in /home/filehost/cwalker/sched/catalogs/freq.dat Setup group: 1 Station: VLBA Total bit rate: 128 Format: VLBA1:2 Bits per sample: 2 Sample rate: 8.000 Number of channels: 8 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= 21500.00 21500.00 21500.00 21500.00 21500.00 21500.00 21500.00 21500.00 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 = B D B D B D B D VLBA FE= omit 1cm omit 1cm VLBA Synth= 8.9 15.4 12.6 The following frequency sets based on this setup were used. Frequency Set: 1 Based on FREQ, BW, and/or DOPPLER in schedule. Used pcal sets: 1 LO sum= 22207.78 22207.78 22197.40 22197.40 22126.42 22126.42 22111.59 22111.59 BBC fr= 707.78 707.78 697.40 697.40 626.42 626.42 611.59 611.59 Bandwd= 4.000 4.000 4.000 4.000 4.000 4.000 4.000 4.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 1 PCAL = OFF PCALXB1= S1 S2 S3 S4 S5 S6 S7 S8 PCALXB2= M1 M2 M3 M4 M5 M6 M7 M8 PCALFR1= 0 0 0 0 0 0 0 0 PCALFR2= 0 0 0 0 0 0 0 0 Track assignments are: track1= 2, 10, 18, 26, 3, 11, 19, 27 barrel=roll_auto SOURCE LIST -- Something Interesting is Happening in NGC4258 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) * NGC4258 12 16 29.364915 * 12 18 57.504600 12 19 11.299587 47 34 53.16919 * 47 18 14.30300 47 16 43.14681 From catalog imbedded in main SCHED input file. Doppler based on LSR frame and radio definition. Velocities: 350.00 350.00 490.00 490.00 1447.00 1447.00 1647.00 1647.00 J0927+3902 09 23 55.319195 * 09 27 03.013916 09 27 19.653554 0923+392 39 15 23.56655 * 39 02 20.85195 39 01 20.19082 * 4C39.25 /home/filehost/cwalker/sched/catalogs/sources.vlba J0927+39 ICRF - Ext.1 Source - 1998 IERS Annual Report Doppler based on other sources. J1310+3220 13 08 07.560126 * 13 10 28.663845 13 10 41.181257 * 1308+326 32 36 40.23888 * 32 20 43.78295 32 19 13.21513 J1310+32 /home/filehost/cwalker/sched/catalogs/sources.vlba ICRF - Ext.1 Source - 1998 IERS Annual Report Doppler based on other sources. 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) NGC4258 135.8 4C39.25 144.8 1308+326 138.1 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