COVER INFORMATION Station: VLBA_MK (Code Mk ) Experiment: Something Interesting is Happening in NGC4258 Exp. Code: BG145D 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) ---------------------------------------------------------------------------------------- --- Sun 29 Feb 2004 Day 60 --- Next scan frequencies: 22207.75 22207.75 22197.37 22197.37 22126.39 22126.39 22111.56 22111.56 Next BBC frequencies: 707.75 707.75 697.37 697.37 626.39 626.39 611.56 611.56 Next scan bandwidths: 4.00 4.00 4.00 4.00 4.00 4.00 4.00 4.00 03 14 20 4C39.25 03 25 39 12.0 52.6 -6.0 -74.1 0 1 1 0 03 14 20 03 19 20 --- 03 30 40 12.9 52.9 -5.9 -74.9 300 F 1 2001 04 04 20 4C39.25 04 15 47 21.5 54.7 -5.2 -81.4 2676 1 1 2001 04 04 20 04 09 20 --- 04 20 48 22.5 54.9 -5.1 -82.1 300 F 1 4002 04 30 20 NGC4258 04 41 51 -0.8 38.2 -7.6 D -59.0 1213 1 1 4002 04 30 20 04 52 20 --- 05 03 55 2.5 40.0 -7.3 -63.1 0 F 1 12805 04 54 20 4C39.25 05 05 55 31.2 55.6 -4.4 -88.9 56 1 1 12805 04 54 20 04 59 20 --- 05 10 56 32.2 55.7 -4.3 -89.7 300 F 1 14806 05 01 20 NGC4258 05 12 56 3.8 40.7 -7.1 -64.7 57 1 2 14806 05 01 20 05 18 20 --- 05 29 59 6.5 41.8 -6.8 -67.7 1020 R 1 13592 05 20 20 NGC4258 05 31 59 6.8 42.0 -6.8 -68.0 113 1 2 13592 05 20 20 05 42 20 --- 05 54 03 10.3 43.3 -6.4 -71.9 1320 R 1 4790 05 44 20 4C39.25 05 56 03 40.9 55.0 -3.5 -97.2 52 1 2 4790 05 44 20 05 49 20 --- 06 01 04 41.9 54.8 -3.4 -98.1 300 R 1 2789 05 51 19 NGC4258 06 03 04 11.8 43.7 -6.3 -73.5 53 1 3 2789 05 51 19 06 08 20 --- 06 20 07 14.6 44.5 -6.0 -76.4 1020 F 1 4013 06 10 19 NGC4258 06 22 07 14.9 44.6 -6.0 -76.8 113 1 3 4013 06 10 19 06 32 20 --- 06 44 11 18.6 45.4 -5.6 -80.6 1320 F 1 12815 06 34 19 4C39.25 06 46 11 50.4 52.1 -2.7 -107.2 50 1 3 12815 06 34 19 06 39 20 --- 06 51 12 51.4 51.6 -2.6 -108.4 300 F 1 14816 06 41 19 NGC4258 06 53 12 20.1 45.6 -5.4 -82.2 51 1 4 14816 06 41 19 06 58 19 --- 07 10 15 23.0 45.9 -5.1 -85.2 1020 R 1 13582 07 00 19 NGC4258 07 12 15 23.3 46.0 -5.1 -85.6 113 1 4 13582 07 00 19 07 22 20 --- 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) ---------------------------------------------------------------------------------------- --- Sun 29 Feb 2004 Day 60 --- 07 24 19 4C39.25 07 36 19 59.3 45.2 -1.9 -120.8 49 1 4 4780 07 24 19 07 29 19 --- 07 41 20 60.2 44.2 -1.8 -122.5 300 R 1 2778 07 31 19 NGC4258 07 43 20 28.6 46.1 -4.6 -91.2 50 1 5 2778 07 31 19 07 48 19 --- 08 00 23 31.4 46.0 -4.3 -94.4 1020 F 1 4023 07 50 19 NGC4258 08 02 23 31.8 45.9 -4.3 -94.8 113 1 5 4023 07 50 19 08 12 19 --- 08 24 27 35.5 45.4 -3.9 -99.1 1320 F 1 12825 08 15 19 1308+326 08 27 27 26.3 62.9 -4.7 -82.3 155 1 5 12825 08 15 19 08 20 19 --- 08 32 28 27.3 63.0 -4.6 -82.9 300 F 1 14827 08 23 18 NGC4258 08 35 28 37.3 45.0 -3.7 -101.4 153 1 6 14827 08 23 18 08 40 19 --- 08 52 31 40.1 44.1 -3.4 -105.1 1020 R 1 13572 08 42 18 NGC4258 08 54 31 40.5 44.0 -3.4 -105.5 113 1 6 13572 08 42 18 09 04 19 --- 09 16 35 44.0 42.4 -3.0 -110.6 1320 R 1 4769 09 07 18 1308+326 09 19 35 37.2 63.9 -3.9 -88.7 159 1 6 4769 09 07 18 09 12 18 --- 09 24 36 38.3 63.9 -3.8 -89.4 300 R 1 2768 09 15 18 NGC4258 09 27 36 45.8 41.5 -2.9 -113.4 159 1 7 2768 09 15 18 09 32 18 --- 09 44 39 48.4 39.6 -2.6 -117.8 1020 F 1 4033 09 34 18 NGC4258 09 46 39 48.7 39.4 -2.5 -118.4 113 1 7 4033 09 34 18 09 56 18 --- 10 08 43 51.9 36.3 -2.2 -124.8 1320 F 1 12836 09 59 18 1308+326 10 11 43 48.2 63.3 -3.0 -96.1 156 1 7 12836 09 59 18 10 04 18 --- 10 16 44 49.3 63.1 -2.9 -96.9 300 F 1 14837 10 07 17 NGC4258 10 19 44 53.4 34.5 -2.0 -128.3 154 1 8 14837 10 07 17 10 24 18 --- 10 36 47 55.5 31.2 -1.7 -134.1 1020 R 1 13562 10 26 17 NGC4258 10 38 47 55.8 30.8 -1.7 -134.8 114 1 8 13562 10 26 17 10 48 18 --- 11 00 51 58.2 25.6 -1.3 -143.2 1320 R 1 4759 10 51 17 1308+326 11 03 51 59.0 59.7 -2.1 -106.0 151 1 8 4759 10 51 17 10 56 17 --- 11 08 52 60.1 59.1 -2.0 -107.2 300 R 1 2758 10 59 17 NGC4258 11 11 52 59.3 22.6 -1.1 -147.8 149 1 9 2758 10 59 17 11 16 17 --- 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) ---------------------------------------------------------------------------------------- --- Sun 29 Feb 2004 Day 60 --- 11 18 17 NGC4258 11 30 55 60.8 16.9 -0.8 -156.2 114 1 9 4043 11 18 17 11 40 17 --- 11 52 59 62.0 9.5 -0.4 -166.8 1320 F 1 12846 11 42 17 1308+326 11 54 59 68.9 49.7 -1.3 -121.9 87 1 9 12846 11 42 17 11 47 17 --- 12 00 00 69.8 48.1 -1.2 -124.1 300 F 1 14847 11 49 17 NGC4258 12 02 00 62.3 6.3 -0.3 -171.3 86 1 10 14847 11 49 17 12 06 17 --- 12 19 03 62.5 0.0 0.0 -179.9 1020 R 1 13551 12 08 17 NGC4258 12 21 03 62.5 -0.7 0.0 179.0 114 1 10 13551 12 08 17 12 30 17 --- 12 43 07 62.1 -8.7 0.4 167.9 1320 R 1 4749 12 32 17 1308+326 12 45 07 76.2 23.3 -0.4 -153.9 85 1 10 4749 12 32 17 12 37 17 --- 12 50 08 76.7 19.1 -0.3 -158.6 300 R 1 2748 12 39 16 NGC4258 12 52 08 61.7 -11.8 0.5 163.5 84 1 11 2748 12 39 16 12 56 17 --- 13 09 11 60.7 -17.5 0.8 155.4 1020 F 1 4054 12 58 16 NGC4258 13 11 11 60.6 -18.1 0.9 154.5 114 1 11 4054 12 58 16 13 20 17 --- 13 33 15 58.7 -24.5 1.2 144.9 1320 F 1 12856 13 22 16 1308+326 13 35 15 76.3 -22.5 0.4 154.8 78 1 11 12856 13 22 16 13 27 17 --- 13 40 16 75.8 -26.4 0.5 150.3 300 F 1 14857 13 29 16 NGC4258 13 42 16 57.7 -26.8 1.4 141.3 77 1 12 14857 13 29 16 13 46 16 --- 13 59 19 55.8 -30.7 1.7 134.9 1020 R 1 13541 13 48 16 NGC4258 14 01 19 55.6 -31.1 1.7 134.2 114 1 12 13541 13 48 16 14 10 16 --- 14 23 23 52.7 -35.3 2.1 126.7 1320 R 1 4739 14 12 16 1308+326 14 25 23 69.1 -49.4 1.2 122.3 81 1 12 4739 14 12 16 14 17 16 --- 14 30 24 68.2 -50.9 1.3 120.2 300 R 1 2737 14 19 16 NGC4258 14 32 24 51.5 -36.7 2.2 124.0 80 1 13 2737 14 19 16 14 36 16 --- 14 49 27 49.0 -39.1 2.5 119.0 1020 F 1 4064 14 38 16 NGC4258 14 51 27 48.7 -39.3 2.5 118.5 113 1 13 4064 14 38 16 14 55 16 --- 15 08 30 46.1 -41.2 2.8 113.9 1020 F 1 10865 14 57 16 1308+326 15 10 30 60.5 -58.9 2.0 107.7 85 1 13 10865 14 57 16 15 02 16 --- 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= 22207.75 22207.75 22197.37 22197.37 22126.39 22126.39 22111.56 22111.56 BBC fr= 707.75 707.75 697.37 697.37 626.39 626.39 611.56 611.56 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 11.323494 47 34 53.16919 * 47 18 14.30300 47 16 43.28116 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 19.656515 0923+392 39 15 23.56655 * 39 02 20.85195 39 01 20.30103 * 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 41.207644 * 1308+326 32 36 40.23888 * 32 20 43.78295 32 19 13.26007 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 4C39.25 144.0 1308+326 138.6 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