COVER INFORMATION Station: VLBA_OV (Code Ov ) 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_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) ---------------------------------------------------------------------------------------- --- 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 05 54 22 48.7 70.5 -3.5 -75.1 0 1 1 0 03 18 16 03 23 16 --- 05 59 23 49.6 70.9 -3.5 -75.6 300 F 1 2001 03 25 16 NGC4258 06 01 23 23.7 47.6 -6.3 -60.1 62 1 1 2001 03 25 16 03 42 16 --- 06 18 26 26.3 49.2 -6.0 -62.6 1020 F 1 8803 03 44 16 NGC4258 06 20 26 26.6 49.3 -6.0 -62.9 113 1 1 8803 03 44 16 04 06 16 --- 06 42 30 30.0 51.2 -5.6 -66.1 1320 F 1 17605 04 08 16 4C39.25 06 44 30 58.2 74.0 -2.7 -80.2 57 1 2 17605 04 08 16 04 13 16 --- 06 49 31 59.2 74.3 -2.6 -80.7 300 R 1 15604 04 15 16 NGC4258 06 51 31 31.4 51.9 -5.5 -67.4 58 1 2 15604 04 15 16 04 32 16 --- 07 08 34 34.1 53.1 -5.2 -69.8 1020 R 1 8803 04 34 16 NGC4258 07 10 34 34.4 53.3 -5.1 -70.1 113 1 2 8803 04 34 16 04 56 16 --- 07 32 38 37.9 54.7 -4.8 -73.3 1320 R 1 0 04 58 16 4C39.25 07 34 38 67.9 76.7 -1.9 -85.7 54 1 3 0 04 58 16 05 03 16 --- 07 39 39 68.8 76.8 -1.8 -86.3 300 F 1 2001 05 05 16 NGC4258 07 41 39 39.4 55.3 -4.6 -74.7 55 1 3 2001 05 05 16 05 22 16 --- 07 58 42 42.2 56.2 -4.3 -77.2 1020 F 1 8803 05 24 15 NGC4258 08 00 42 42.5 56.3 -4.3 -77.5 113 1 3 8803 05 24 15 05 46 16 --- 08 22 46 46.2 57.3 -3.9 -80.8 1320 F 1 17605 05 48 16 4C39.25 08 24 46 77.6 76.9 -1.0 -93.4 51 1 4 17605 05 48 16 05 53 16 --- 08 29 47 78.6 76.6 -1.0 -94.5 300 R 1 15604 05 55 15 NGC4258 08 31 47 47.7 57.6 -3.8 -82.3 52 1 4 15604 05 55 15 06 12 16 --- 08 48 50 50.6 58.1 -3.5 -85.0 1020 R 1 8803 06 14 15 NGC4258 08 50 50 50.9 58.1 -3.5 -85.4 113 1 4 8803 06 14 15 06 36 16 --- 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) ---------------------------------------------------------------------------------------- --- Sat 28 Feb 2004 Day 59 --- 06 38 15 4C39.25 09 14 54 87.0 52.8 -0.2 -125.3 49 1 5 0 06 38 15 06 43 15 --- 09 19 55 87.7 38.6 -0.1 -140.3 300 F 1 2001 06 45 15 NGC4258 09 21 55 56.2 58.4 -3.0 -90.8 51 1 5 2001 06 45 15 07 02 15 --- 09 38 58 59.1 58.2 -2.7 -94.2 1020 F 1 8803 07 04 15 NGC4258 09 40 58 59.4 58.1 -2.6 -94.6 113 1 5 8803 07 04 15 07 26 15 --- 10 03 02 63.1 57.2 -2.3 -99.5 1320 F 1 17605 07 28 15 4C39.25 10 05 02 82.4 -73.5 0.6 100.6 27 1 6 17605 07 28 15 07 33 15 --- 10 10 03 81.4 -74.7 0.7 98.7 300 R 1 15604 07 35 15 NGC4258 10 12 03 64.6 56.6 -2.1 -101.7 26 1 6 15604 07 35 15 07 52 15 --- 10 29 06 67.4 54.8 -1.8 -106.4 1020 R 1 8803 07 54 15 NGC4258 10 31 06 67.8 54.6 -1.8 -107.0 113 1 6 8803 07 54 15 08 16 15 --- 10 53 10 71.3 50.8 -1.4 -114.6 1320 R 1 0 08 19 15 1308+326 10 56 10 62.1 90.0 -2.2 -70.4 147 1 7 0 08 19 15 08 24 15 --- 11 01 11 63.1 90.8 -2.2 -70.4 300 F 1 2001 08 27 14 NGC4258 11 04 11 72.9 48.0 -1.3 -119.3 145 1 7 2001 08 27 14 08 44 15 --- 11 21 14 75.3 42.2 -1.0 -128.0 1020 F 1 8803 08 46 14 NGC4258 11 23 14 75.6 41.3 -0.9 -129.2 114 1 7 8803 08 46 14 09 08 15 --- 11 45 18 78.2 29.2 -0.6 -145.1 1320 F 1 17605 09 11 14 1308+326 11 48 18 72.4 100.1 -1.4 -68.1 126 1 8 17605 09 11 14 09 16 14 --- 11 53 19 73.4 101.5 -1.3 -67.4 300 R 1 15604 09 19 14 NGC4258 11 56 19 79.1 21.0 -0.4 -155.2 120 1 8 15604 09 19 14 09 36 14 --- 12 13 22 79.9 5.6 -0.1 -173.4 1020 R 1 8803 09 38 14 NGC4258 12 15 22 79.9 3.7 -0.1 -175.6 112 1 8 8803 09 38 14 10 00 14 --- 12 37 26 79.4 -17.1 0.3 159.9 1320 R 1 0 10 03 14 1308+326 12 40 26 82.1 126.1 -0.5 -49.6 78 1 9 0 10 03 14 10 08 14 --- 12 45 27 82.9 131.6 -0.4 -44.8 300 F 1 2001 10 11 13 NGC4258 12 48 27 78.6 -25.9 0.5 149.1 68 1 9 2001 10 11 13 10 28 14 --- 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) ---------------------------------------------------------------------------------------- --- Sat 28 Feb 2004 Day 59 --- 10 30 13 NGC4258 13 07 30 76.6 -37.7 0.8 134.1 113 1 9 8803 10 30 13 10 52 14 --- 13 29 34 73.6 -46.6 1.2 121.4 1320 F 1 17605 10 55 13 1308+326 13 32 34 83.3 224.0 0.4 40.9 -7 1 10 17605 10 55 13 11 00 13 --- 13 37 35 82.6 230.3 0.4 46.5 293 R 1 15604 11 03 13 NGC4258 13 40 35 72.0 310.3 1.4 116.5 120 1 10 15604 11 03 13 11 20 13 --- 13 57 38 69.3 306.8 1.6 110.1 1020 R 1 8803 11 22 13 NGC4258 13 59 38 69.0 306.5 1.7 109.4 113 1 10 8803 11 22 13 11 44 13 --- 14 21 42 65.4 303.8 2.0 102.9 1320 R 1 0 11 46 13 1308+326 14 23 42 74.3 257.3 1.2 66.8 83 1 11 0 11 46 13 11 51 13 --- 14 28 43 73.3 258.7 1.3 67.5 300 F 1 2001 11 53 13 NGC4258 14 30 43 63.9 303.1 2.2 100.6 84 1 11 2001 11 53 13 12 10 13 --- 14 47 46 61.1 302.2 2.5 96.6 1020 F 1 8803 12 12 12 NGC4258 14 49 46 60.7 302.1 2.5 96.2 113 1 11 8803 12 12 12 12 34 13 --- 15 11 50 57.0 301.6 2.9 91.7 1320 F 1 17605 12 36 13 1308+326 15 13 50 64.4 268.2 2.1 70.3 91 1 12 17605 12 36 13 12 41 13 --- 15 18 51 63.4 269.0 2.1 70.4 300 R 1 15604 12 43 12 NGC4258 15 20 51 55.5 301.6 3.0 90.0 92 1 12 15604 12 43 12 13 00 13 --- 15 37 54 52.6 301.7 3.3 87.0 1020 R 1 8803 13 02 12 NGC4258 15 39 54 52.2 301.7 3.3 86.6 113 1 12 8803 13 02 12 13 24 13 --- 16 01 58 48.5 302.2 3.7 83.0 1320 R 1 0 13 26 12 1308+326 16 03 58 54.4 275.3 2.9 69.7 96 1 13 0 13 26 12 13 31 12 --- 16 08 59 53.4 275.9 3.0 69.6 300 F 1 2001 13 33 12 NGC4258 16 10 59 47.0 302.6 3.9 81.6 96 1 13 2001 13 33 12 13 50 12 --- 16 28 02 44.1 303.3 4.1 78.9 1020 F 1 8803 13 52 12 NGC4258 16 30 02 43.8 303.3 4.2 78.6 113 1 13 8803 13 52 12 14 14 12 --- 16 52 06 40.2 304.5 4.5 75.3 1320 F 1 17605 14 16 12 1308+326 16 54 06 44.5 281.2 3.7 67.5 98 1 14 17605 14 16 12 14 21 12 --- 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) ---------------------------------------------------------------------------------------- --- Sat 28 Feb 2004 Day 59 --- 14 23 12 NGC4258 17 01 07 38.7 305.0 4.7 74.0 98 1 14 15604 14 23 12 14 40 12 --- 17 18 10 35.9 306.1 5.0 71.5 1020 R 1 8803 14 42 12 NGC4258 17 20 10 35.6 306.2 5.0 71.2 113 1 14 8803 14 42 12 14 59 12 --- 17 37 13 32.9 307.4 5.3 68.8 1020 R 1 2001 15 01 12 1308+326 17 39 13 35.8 286.3 4.5 64.8 100 1 14 2001 15 01 12 15 06 12 --- 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= 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