COVER INFORMATION Station: VLBA_MK (Code Mk ) Experiment: Something Interesting is Happening in NGC4258 Exp. Code: BG145B 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) ---------------------------------------------------------------------------------------- --- Fri 20 Feb 2004 Day 51 --- Next scan frequencies: 22208.00 22208.00 22197.62 22197.62 22126.64 22126.64 22111.81 22111.81 Next BBC frequencies: 708.00 708.00 697.62 697.62 626.64 626.64 611.81 611.81 Next scan bandwidths: 4.00 4.00 4.00 4.00 4.00 4.00 4.00 4.00 03 49 43 4C39.25 03 25 39 12.0 52.6 -6.0 -74.1 0 1 1 0 03 49 43 03 54 44 --- 03 30 40 12.9 52.9 -5.9 -74.9 300 F 1 2001 04 39 43 4C39.25 04 15 47 21.5 54.7 -5.2 -81.4 2676 1 1 2001 04 39 43 04 44 43 --- 04 20 48 22.5 54.9 -5.1 -82.1 300 F 1 4002 05 05 43 NGC4258 04 41 51 -0.8 38.2 -7.6 D -59.0 1213 1 1 4002 05 05 43 05 27 43 --- 05 03 55 2.5 40.0 -7.3 -63.1 0 F 1 12805 05 29 43 4C39.25 05 05 55 31.2 55.6 -4.4 -88.9 56 1 1 12805 05 29 43 05 34 43 --- 05 10 56 32.2 55.7 -4.3 -89.7 300 F 1 14806 05 36 43 NGC4258 05 12 56 3.8 40.7 -7.1 -64.7 57 1 2 14806 05 36 43 05 53 43 --- 05 29 59 6.5 41.8 -6.8 -67.7 1020 R 1 13592 05 55 43 NGC4258 05 31 59 6.8 42.0 -6.8 -68.0 113 1 2 13592 05 55 43 06 17 43 --- 05 54 03 10.3 43.3 -6.4 -71.9 1320 R 1 4790 06 19 43 4C39.25 05 56 03 40.9 55.0 -3.5 -97.2 52 1 2 4790 06 19 43 06 24 43 --- 06 01 04 41.9 54.8 -3.4 -98.1 300 R 1 2789 06 26 43 NGC4258 06 03 04 11.8 43.7 -6.3 -73.5 53 1 3 2789 06 26 43 06 43 43 --- 06 20 07 14.6 44.5 -6.0 -76.4 1020 F 1 4013 06 45 43 NGC4258 06 22 07 14.9 44.6 -6.0 -76.8 113 1 3 4013 06 45 43 07 07 43 --- 06 44 11 18.6 45.4 -5.6 -80.6 1320 F 1 12815 07 09 43 4C39.25 06 46 11 50.4 52.1 -2.7 -107.2 50 1 3 12815 07 09 43 07 14 43 --- 06 51 12 51.4 51.6 -2.6 -108.4 300 F 1 14816 07 16 42 NGC4258 06 53 12 20.1 45.6 -5.4 -82.2 51 1 4 14816 07 16 42 07 33 43 --- 07 10 15 23.0 45.9 -5.1 -85.2 1020 R 1 13582 07 35 42 NGC4258 07 12 15 23.3 46.0 -5.1 -85.6 113 1 4 13582 07 35 42 07 57 43 --- 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) ---------------------------------------------------------------------------------------- --- Fri 20 Feb 2004 Day 51 --- 07 59 42 4C39.25 07 36 19 59.3 45.2 -1.9 -120.8 49 1 4 4780 07 59 42 08 04 43 --- 07 41 20 60.2 44.2 -1.8 -122.5 300 R 1 2778 08 06 42 NGC4258 07 43 20 28.6 46.1 -4.6 -91.2 50 1 5 2778 08 06 42 08 23 42 --- 08 00 23 31.4 46.0 -4.3 -94.4 1020 F 1 4023 08 25 42 NGC4258 08 02 23 31.8 45.9 -4.3 -94.8 113 1 5 4023 08 25 42 08 47 42 --- 08 24 27 35.5 45.4 -3.9 -99.1 1320 F 1 12825 08 50 42 1308+326 08 27 27 26.3 62.9 -4.7 -82.3 155 1 5 12825 08 50 42 08 55 42 --- 08 32 28 27.3 63.0 -4.6 -82.9 300 F 1 14827 08 58 42 NGC4258 08 35 28 37.3 45.0 -3.7 -101.4 153 1 6 14827 08 58 42 09 15 42 --- 08 52 31 40.1 44.1 -3.4 -105.1 1020 R 1 13572 09 17 42 NGC4258 08 54 31 40.5 44.0 -3.4 -105.5 113 1 6 13572 09 17 42 09 39 42 --- 09 16 35 44.0 42.4 -3.0 -110.6 1320 R 1 4769 09 42 41 1308+326 09 19 35 37.2 63.9 -3.9 -88.7 159 1 6 4769 09 42 41 09 47 42 --- 09 24 36 38.3 63.9 -3.8 -89.4 300 R 1 2768 09 50 41 NGC4258 09 27 36 45.8 41.5 -2.9 -113.4 159 1 7 2768 09 50 41 10 07 41 --- 09 44 39 48.4 39.6 -2.6 -117.8 1020 F 1 4033 10 09 41 NGC4258 09 46 39 48.7 39.4 -2.5 -118.4 113 1 7 4033 10 09 41 10 31 41 --- 10 08 43 51.9 36.3 -2.2 -124.8 1320 F 1 12836 10 34 41 1308+326 10 11 43 48.2 63.3 -3.0 -96.1 156 1 7 12836 10 34 41 10 39 41 --- 10 16 44 49.3 63.1 -2.9 -96.9 300 F 1 14837 10 42 41 NGC4258 10 19 44 53.4 34.5 -2.0 -128.3 154 1 8 14837 10 42 41 10 59 41 --- 10 36 47 55.5 31.2 -1.7 -134.1 1020 R 1 13562 11 01 40 NGC4258 10 38 47 55.8 30.8 -1.7 -134.8 114 1 8 13562 11 01 40 11 23 41 --- 11 00 51 58.2 25.6 -1.3 -143.2 1320 R 1 4759 11 26 40 1308+326 11 03 51 59.0 59.7 -2.1 -106.0 151 1 8 4759 11 26 40 11 31 41 --- 11 08 52 60.1 59.1 -2.0 -107.2 300 R 1 2758 11 34 40 NGC4258 11 11 52 59.3 22.6 -1.1 -147.8 149 1 9 2758 11 34 40 11 51 40 --- 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) ---------------------------------------------------------------------------------------- --- Fri 20 Feb 2004 Day 51 --- 11 53 40 NGC4258 11 30 55 60.8 16.9 -0.8 -156.2 114 1 9 4043 11 53 40 12 15 40 --- 11 52 59 62.0 9.5 -0.4 -166.8 1320 F 1 12846 12 17 40 1308+326 11 54 59 68.9 49.7 -1.3 -121.9 87 1 9 12846 12 17 40 12 22 40 --- 12 00 00 69.8 48.1 -1.2 -124.1 300 F 1 14847 12 24 40 NGC4258 12 02 00 62.3 6.3 -0.3 -171.3 86 1 10 14847 12 24 40 12 41 40 --- 12 19 03 62.5 0.0 0.0 -179.9 1020 R 1 13551 12 43 40 NGC4258 12 21 03 62.5 -0.7 0.0 179.0 114 1 10 13551 12 43 40 13 05 40 --- 12 43 07 62.1 -8.7 0.4 167.9 1320 R 1 4749 13 07 40 1308+326 12 45 07 76.2 23.3 -0.4 -153.9 85 1 10 4749 13 07 40 13 12 40 --- 12 50 08 76.7 19.1 -0.3 -158.6 300 R 1 2748 13 14 40 NGC4258 12 52 08 61.7 -11.8 0.5 163.5 84 1 11 2748 13 14 40 13 31 40 --- 13 09 11 60.7 -17.5 0.8 155.4 1020 F 1 4054 13 33 40 NGC4258 13 11 11 60.6 -18.1 0.9 154.5 114 1 11 4054 13 33 40 13 55 40 --- 13 33 15 58.7 -24.5 1.2 144.9 1320 F 1 12856 13 57 40 1308+326 13 35 15 76.3 -22.5 0.4 154.8 78 1 11 12856 13 57 40 14 02 40 --- 13 40 16 75.8 -26.4 0.5 150.3 300 F 1 14857 14 04 39 NGC4258 13 42 16 57.7 -26.8 1.4 141.3 77 1 12 14857 14 04 39 14 21 40 --- 13 59 19 55.8 -30.7 1.7 134.9 1020 R 1 13541 14 23 39 NGC4258 14 01 19 55.6 -31.1 1.7 134.2 114 1 12 13541 14 23 39 14 45 40 --- 14 23 23 52.7 -35.3 2.1 126.7 1320 R 1 4739 14 47 39 1308+326 14 25 23 69.1 -49.4 1.2 122.3 81 1 12 4739 14 47 39 14 52 40 --- 14 30 24 68.2 -50.9 1.3 120.2 300 R 1 2737 14 54 39 NGC4258 14 32 24 51.5 -36.7 2.2 124.0 80 1 13 2737 14 54 39 15 11 39 --- 14 49 27 49.0 -39.1 2.5 119.0 1020 F 1 4064 15 13 39 NGC4258 14 51 27 48.7 -39.3 2.5 118.5 113 1 13 4064 15 13 39 15 30 39 --- 15 08 30 46.1 -41.2 2.8 113.9 1020 F 1 10865 15 32 39 1308+326 15 10 30 60.5 -58.9 2.0 107.7 85 1 13 10865 15 32 39 15 37 39 --- 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= 22208.00 22208.00 22197.62 22197.62 22126.64 22126.64 22111.81 22111.81 BBC fr= 708.00 708.00 697.62 697.62 626.64 626.64 611.81 611.81 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 11.136291 47 34 53.16919 * 47 18 14.30300 47 16 41.82920 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 19.678337 0923+392 39 15 23.56655 * 39 02 20.85195 39 01 18.95358 * 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 41.005533 * 1308+326 32 36 40.23888 * 32 20 43.78295 32 19 12.67711 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 135.1 4C39.25 150.3 1308+326 133.9 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