COVER INFORMATION Station: VLBA_OV (Code Ov ) 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_OV (Code Ov ) 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 05 54 22 48.7 70.5 -3.5 -75.1 0 1 1 0 03 49 43 03 54 44 --- 05 59 23 49.6 70.9 -3.5 -75.6 300 F 1 2001 03 56 43 NGC4258 06 01 23 23.7 47.6 -6.3 -60.1 62 1 1 2001 03 56 43 04 13 43 --- 06 18 26 26.3 49.2 -6.0 -62.6 1020 F 1 8803 04 15 43 NGC4258 06 20 26 26.6 49.3 -6.0 -62.9 113 1 1 8803 04 15 43 04 37 44 --- 06 42 30 30.0 51.2 -5.6 -66.1 1320 F 1 17605 04 39 43 4C39.25 06 44 30 58.2 74.0 -2.7 -80.2 57 1 2 17605 04 39 43 04 44 43 --- 06 49 31 59.2 74.3 -2.6 -80.7 300 R 1 15604 04 46 43 NGC4258 06 51 31 31.4 51.9 -5.5 -67.4 58 1 2 15604 04 46 43 05 03 43 --- 07 08 34 34.1 53.1 -5.2 -69.8 1020 R 1 8803 05 05 43 NGC4258 07 10 34 34.4 53.3 -5.1 -70.1 113 1 2 8803 05 05 43 05 27 43 --- 07 32 38 37.9 54.7 -4.8 -73.3 1320 R 1 0 05 29 43 4C39.25 07 34 38 67.9 76.7 -1.9 -85.7 54 1 3 0 05 29 43 05 34 43 --- 07 39 39 68.8 76.9 -1.8 -86.3 300 F 1 2001 05 36 43 NGC4258 07 41 39 39.4 55.3 -4.6 -74.7 55 1 3 2001 05 36 43 05 53 43 --- 07 58 42 42.2 56.2 -4.3 -77.2 1020 F 1 8803 05 55 43 NGC4258 08 00 42 42.5 56.3 -4.3 -77.5 113 1 3 8803 05 55 43 06 17 43 --- 08 22 46 46.2 57.3 -3.9 -80.8 1320 F 1 17605 06 19 43 4C39.25 08 24 46 77.6 76.9 -1.0 -93.4 51 1 4 17605 06 19 43 06 24 43 --- 08 29 47 78.6 76.6 -1.0 -94.5 300 R 1 15604 06 26 43 NGC4258 08 31 47 47.7 57.6 -3.8 -82.3 52 1 4 15604 06 26 43 06 43 43 --- 08 48 50 50.6 58.1 -3.5 -85.0 1020 R 1 8803 06 45 43 NGC4258 08 50 50 50.9 58.1 -3.5 -85.4 113 1 4 8803 06 45 43 07 07 43 --- 09 12 54 54.7 58.4 -3.1 -89.2 1320 R 1 0 Schedule for VLBA_OV (Code Ov ) 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 09 43 4C39.25 09 14 54 87.0 52.8 -0.2 -125.3 49 1 5 0 07 09 43 07 14 43 --- 09 19 55 87.7 38.6 -0.1 -140.3 300 F 1 2001 07 16 42 NGC4258 09 21 55 56.2 58.4 -3.0 -90.8 51 1 5 2001 07 16 42 07 33 43 --- 09 38 58 59.1 58.2 -2.7 -94.2 1020 F 1 8803 07 35 42 NGC4258 09 40 58 59.4 58.1 -2.6 -94.6 113 1 5 8803 07 35 42 07 57 43 --- 10 03 02 63.1 57.2 -2.3 -99.5 1320 F 1 17605 07 59 42 4C39.25 10 05 02 82.4 -73.5 0.6 100.6 27 1 6 17605 07 59 42 08 04 43 --- 10 10 03 81.4 -74.7 0.7 98.7 300 R 1 15604 08 06 42 NGC4258 10 12 03 64.6 56.6 -2.1 -101.7 26 1 6 15604 08 06 42 08 23 42 --- 10 29 06 67.4 54.8 -1.8 -106.4 1020 R 1 8803 08 25 42 NGC4258 10 31 06 67.8 54.6 -1.8 -107.0 113 1 6 8803 08 25 42 08 47 42 --- 10 53 10 71.3 50.8 -1.4 -114.6 1320 R 1 0 08 50 42 1308+326 10 56 10 62.1 90.0 -2.2 -70.4 147 1 7 0 08 50 42 08 55 42 --- 11 01 11 63.1 90.8 -2.2 -70.4 300 F 1 2001 08 58 42 NGC4258 11 04 11 72.9 48.0 -1.3 -119.3 145 1 7 2001 08 58 42 09 15 42 --- 11 21 14 75.4 42.2 -1.0 -128.0 1020 F 1 8803 09 17 42 NGC4258 11 23 14 75.6 41.3 -0.9 -129.2 114 1 7 8803 09 17 42 09 39 42 --- 11 45 18 78.2 29.2 -0.6 -145.1 1320 F 1 17605 09 42 41 1308+326 11 48 18 72.4 100.1 -1.4 -68.1 126 1 8 17605 09 42 41 09 47 42 --- 11 53 19 73.4 101.5 -1.3 -67.4 300 R 1 15604 09 50 41 NGC4258 11 56 19 79.1 21.0 -0.4 -155.2 120 1 8 15604 09 50 41 10 07 41 --- 12 13 22 79.9 5.6 -0.1 -173.4 1020 R 1 8803 10 09 41 NGC4258 12 15 22 79.9 3.7 -0.1 -175.7 112 1 8 8803 10 09 41 10 31 41 --- 12 37 26 79.4 -17.1 0.3 159.8 1320 R 1 0 10 34 41 1308+326 12 40 26 82.1 126.1 -0.5 -49.6 78 1 9 0 10 34 41 10 39 41 --- 12 45 27 82.9 131.6 -0.4 -44.8 300 F 1 2001 10 42 41 NGC4258 12 48 27 78.6 -25.9 0.5 149.1 68 1 9 2001 10 42 41 10 59 41 --- 13 05 30 76.8 -36.7 0.8 135.5 1020 F 1 8803 Schedule for VLBA_OV (Code Ov ) 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 01 40 NGC4258 13 07 30 76.6 -37.7 0.8 134.1 113 1 9 8803 11 01 40 11 23 41 --- 13 29 34 73.6 -46.6 1.2 121.4 1320 F 1 17605 11 26 40 1308+326 13 32 34 83.3 224.1 0.4 40.9 -7 1 10 17605 11 26 40 11 31 41 --- 13 37 35 82.6 230.3 0.4 46.5 293 R 1 15604 11 34 40 NGC4258 13 40 35 72.0 310.3 1.4 116.5 120 1 10 15604 11 34 40 11 51 40 --- 13 57 38 69.3 306.8 1.6 110.1 1020 R 1 8803 11 53 40 NGC4258 13 59 38 69.0 306.5 1.7 109.4 113 1 10 8803 11 53 40 12 15 40 --- 14 21 42 65.4 303.8 2.0 102.9 1320 R 1 0 12 17 40 1308+326 14 23 42 74.3 257.3 1.2 66.8 83 1 11 0 12 17 40 12 22 40 --- 14 28 43 73.3 258.7 1.3 67.5 300 F 1 2001 12 24 40 NGC4258 14 30 43 63.9 303.1 2.2 100.6 84 1 11 2001 12 24 40 12 41 40 --- 14 47 46 61.1 302.2 2.5 96.6 1020 F 1 8803 12 43 40 NGC4258 14 49 46 60.7 302.1 2.5 96.2 113 1 11 8803 12 43 40 13 05 40 --- 15 11 50 57.0 301.6 2.9 91.7 1320 F 1 17605 13 07 40 1308+326 15 13 50 64.4 268.2 2.1 70.3 91 1 12 17605 13 07 40 13 12 40 --- 15 18 51 63.4 269.0 2.1 70.4 300 R 1 15604 13 14 40 NGC4258 15 20 51 55.5 301.6 3.0 90.0 92 1 12 15604 13 14 40 13 31 40 --- 15 37 54 52.6 301.7 3.3 87.0 1020 R 1 8803 13 33 40 NGC4258 15 39 54 52.2 301.7 3.3 86.6 113 1 12 8803 13 33 40 13 55 40 --- 16 01 58 48.5 302.2 3.7 83.0 1320 R 1 0 13 57 40 1308+326 16 03 58 54.4 275.3 2.9 69.7 96 1 13 0 13 57 40 14 02 40 --- 16 08 59 53.4 275.9 3.0 69.6 300 F 1 2001 14 04 39 NGC4258 16 10 59 47.0 302.6 3.9 81.6 96 1 13 2001 14 04 39 14 21 40 --- 16 28 02 44.1 303.3 4.1 78.9 1020 F 1 8803 14 23 39 NGC4258 16 30 02 43.8 303.3 4.2 78.6 113 1 13 8803 14 23 39 14 45 40 --- 16 52 06 40.2 304.5 4.5 75.3 1320 F 1 17605 14 47 39 1308+326 16 54 06 44.5 281.2 3.7 67.5 98 1 14 17605 14 47 39 14 52 40 --- 16 59 07 43.5 281.8 3.8 67.3 300 R 1 15604 Schedule for VLBA_OV (Code Ov ) Page 5 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 --- 14 54 39 NGC4258 17 01 07 38.7 305.0 4.7 74.0 98 1 14 15604 14 54 39 15 11 39 --- 17 18 10 35.9 306.1 5.0 71.5 1020 R 1 8803 15 13 39 NGC4258 17 20 10 35.6 306.2 5.0 71.2 113 1 14 8803 15 13 39 15 30 39 --- 17 37 13 32.9 307.4 5.3 68.8 1020 R 1 2001 15 32 39 1308+326 17 39 13 35.8 286.3 4.5 64.8 100 1 14 2001 15 32 39 15 37 39 --- 17 44 14 34.8 286.8 4.6 64.4 300 R 1 0 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