COVER INFORMATION Station: VLBA_HN (Code Hn ) 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_HN (Code Hn ) 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 08 59 32 83.5 124.4 -0.5 -51.1 0 1 1 0 03 14 20 03 19 20 --- 09 04 33 84.2 130.4 -0.4 -45.9 300 F 1 2001 03 21 20 NGC4258 09 06 33 56.3 65.6 -3.2 -79.3 58 1 1 2001 03 21 20 03 38 20 --- 09 23 36 59.1 66.5 -2.9 -81.6 1020 F 1 8803 03 40 20 NGC4258 09 25 36 59.5 66.6 -2.9 -81.9 113 1 1 8803 03 40 20 04 02 20 --- 09 47 40 63.2 67.4 -2.5 -85.2 1320 F 1 17605 04 04 20 4C39.25 09 49 40 84.3 229.0 0.4 45.3 6 1 2 17605 04 04 20 04 09 20 --- 09 54 41 83.5 235.1 0.5 50.6 300 R 1 15604 04 11 20 NGC4258 09 56 41 64.7 67.7 -2.4 -86.7 2 1 2 15604 04 11 20 04 28 20 --- 10 13 44 67.6 67.9 -2.1 -89.6 1020 R 1 8803 04 30 20 NGC4258 10 15 44 67.9 67.9 -2.1 -89.9 113 1 2 8803 04 30 20 04 52 20 --- 10 37 48 71.7 67.5 -1.7 -94.4 1320 R 1 0 04 54 20 4C39.25 10 39 48 75.8 260.1 1.2 68.2 -15 1 3 0 04 54 20 04 59 20 --- 10 44 49 74.9 261.6 1.3 68.8 285 F 1 2001 05 01 20 NGC4258 10 46 49 73.2 427.0 -1.5 -96.5 3 1 3 2001 05 01 20 05 18 20 --- 11 03 52 76.1 425.3 -1.3 -101.2 1020 F 1 8803 05 20 20 NGC4258 11 05 52 76.4 425.1 -1.2 -101.9 113 1 3 8803 05 20 20 05 42 20 --- 11 27 56 80.0 419.9 -0.9 -111.0 1320 F 1 17605 05 44 20 4C39.25 11 29 56 66.7 270.8 2.0 70.4 14 1 4 17605 05 44 20 05 49 20 --- 11 34 57 65.7 271.6 2.1 70.4 300 R 1 15604 05 51 19 NGC4258 11 36 57 81.4 416.1 -0.7 -116.4 17 1 4 15604 05 51 19 06 08 20 --- 11 54 00 83.8 403.5 -0.4 -132.1 1020 R 1 8803 06 10 19 NGC4258 11 56 00 84.0 401.3 -0.4 -134.6 112 1 4 8803 06 10 19 06 32 20 --- 12 18 04 85.7 362.5 0.0 -177.3 1320 R 1 0 Schedule for VLBA_HN (Code Hn ) 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 --- 06 34 19 4C39.25 12 20 04 57.5 278.0 2.9 68.9 57 1 5 0 06 34 19 06 39 20 --- 12 25 05 56.6 278.7 3.0 68.7 300 F 1 2001 06 41 19 NGC4258 12 27 05 85.4 342.9 0.1 161.5 56 1 5 2001 06 41 19 06 58 19 --- 12 44 08 83.8 316.8 0.4 132.4 1020 F 1 8803 07 00 19 NGC4258 12 46 08 83.6 314.8 0.4 130.0 112 1 5 8803 07 00 19 07 22 20 --- 13 08 12 80.3 300.9 0.8 112.2 1320 F 1 17605 07 24 19 4C39.25 13 10 12 48.5 284.2 3.7 66.0 50 1 6 17605 07 24 19 07 29 19 --- 13 15 13 47.6 284.8 3.8 65.6 300 R 1 15604 07 31 19 NGC4258 13 17 13 78.9 298.0 1.0 107.7 51 1 6 15604 07 31 19 07 48 19 --- 13 34 16 76.1 294.7 1.3 101.3 1020 R 1 8803 07 50 19 NGC4258 13 36 16 75.8 294.4 1.3 100.7 113 1 6 8803 07 50 19 08 12 19 --- 13 58 20 72.1 292.6 1.7 94.9 1320 R 1 0 08 15 19 1308+326 14 01 20 75.4 227.4 0.8 39.6 130 1 7 0 08 15 19 08 20 19 --- 14 06 21 74.7 230.5 0.9 42.0 300 F 1 2001 08 23 18 NGC4258 14 09 21 70.2 292.2 1.8 92.5 132 1 7 2001 08 23 18 08 40 19 --- 14 26 24 67.3 292.1 2.1 89.3 1020 F 1 8803 08 42 18 NGC4258 14 28 24 67.0 292.1 2.2 88.9 113 1 7 8803 08 42 18 09 04 19 --- 14 50 28 63.2 292.6 2.5 85.3 1320 F 1 17605 09 07 18 1308+326 14 53 28 67.2 250.8 1.7 54.9 146 1 8 17605 09 07 18 09 12 18 --- 14 58 29 66.3 252.4 1.8 55.7 300 R 1 15604 09 15 18 NGC4258 15 01 29 61.4 293.0 2.7 83.6 146 1 8 15604 09 15 18 09 32 18 --- 15 18 32 58.5 293.7 3.0 81.1 1020 R 1 8803 09 34 18 NGC4258 15 20 32 58.2 293.8 3.0 80.8 113 1 8 8803 09 34 18 09 56 18 --- 15 42 36 54.5 295.1 3.4 77.8 1320 R 1 0 09 59 18 1308+326 15 45 36 57.9 263.8 2.6 59.5 153 1 9 0 09 59 18 10 04 18 --- 15 50 37 57.0 264.8 2.7 59.6 300 F 1 2001 10 07 17 NGC4258 15 53 37 52.7 295.8 3.6 76.4 153 1 9 2001 10 07 17 10 24 18 --- 16 10 40 49.9 296.9 3.9 74.1 1020 F 1 8803 Schedule for VLBA_HN (Code Hn ) 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 --- 10 26 17 NGC4258 16 12 40 49.5 297.1 3.9 73.9 113 1 9 8803 10 26 17 10 48 18 --- 16 34 44 46.0 298.8 4.3 71.1 1320 F 1 17605 10 51 17 1308+326 16 37 44 48.3 273.0 3.5 59.9 156 1 10 17605 10 51 17 10 56 17 --- 16 42 45 47.4 273.8 3.5 59.8 300 R 1 15604 10 59 17 NGC4258 16 45 45 44.2 299.7 4.4 69.7 156 1 10 15604 10 59 17 11 16 17 --- 17 02 48 41.5 301.1 4.7 67.5 1020 R 1 8803 11 18 17 NGC4258 17 04 48 41.2 301.3 4.8 67.3 113 1 10 8803 11 18 17 11 40 17 --- 17 26 52 37.8 303.3 5.1 64.5 1320 R 1 0 11 42 17 1308+326 17 28 52 39.1 280.7 4.3 58.4 99 1 11 0 11 42 17 11 47 17 --- 17 33 53 38.2 281.4 4.4 58.1 300 F 1 2001 11 49 17 NGC4258 17 35 53 36.4 304.1 5.3 63.3 99 1 11 2001 11 49 17 12 06 17 --- 17 52 56 33.9 305.7 5.6 61.2 1020 F 1 8803 12 08 17 NGC4258 17 54 56 33.6 305.9 5.6 60.9 113 1 11 8803 12 08 17 12 30 17 --- 18 17 00 30.3 308.2 6.0 58.0 1320 F 1 17605 12 32 17 1308+326 18 19 00 30.2 287.7 5.1 55.6 100 1 12 17605 12 32 17 12 37 17 --- 18 24 01 29.3 288.4 5.2 55.3 300 R 1 15604 12 39 16 NGC4258 18 26 01 29.1 309.1 6.1 56.8 100 1 12 15604 12 39 16 12 56 17 --- 18 43 04 26.7 311.0 6.4 54.6 1020 R 1 8803 12 58 16 NGC4258 18 45 04 26.4 311.2 6.4 54.3 114 1 12 8803 12 58 16 13 20 17 --- 19 07 08 23.4 313.7 6.8 51.3 1320 R 1 0 13 22 16 1308+326 19 09 08 21.6 294.6 6.0 52.0 101 1 13 0 13 22 16 13 27 17 --- 19 14 09 20.8 295.3 6.1 51.5 300 F 1 2001 13 29 16 NGC4258 19 16 09 22.2 314.7 6.9 50.0 101 1 13 2001 13 29 16 13 46 16 --- 19 33 12 20.0 316.8 7.2 47.7 1020 F 1 8803 13 48 16 NGC4258 19 35 12 19.8 317.0 7.3 47.4 114 1 13 8803 13 48 16 14 10 16 --- 19 57 16 17.1 319.8 7.6 44.2 1320 F 1 17605 14 12 16 1308+326 19 59 16 13.5 301.8 6.8 47.4 102 1 14 17605 14 12 16 14 17 16 --- 20 04 17 12.8 302.6 6.9 46.9 300 R 1 15604 Schedule for VLBA_HN (Code Hn ) 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) ---------------------------------------------------------------------------------------- --- Sun 29 Feb 2004 Day 60 --- 14 19 16 NGC4258 20 06 17 16.1 320.9 7.8 42.9 101 1 14 15604 14 19 16 14 36 16 --- 20 23 20 14.1 323.2 8.1 40.3 1020 R 1 8803 14 38 16 NGC4258 20 25 20 13.9 323.4 8.1 40.0 114 1 14 8803 14 38 16 14 55 16 --- 20 42 23 12.1 325.8 8.4 37.4 1020 R 1 2001 14 57 16 1308+326 20 44 23 6.8 308.7 7.6 42.6 102 1 14 2001 14 57 16 15 02 16 --- 20 49 24 6.1 309.4 7.6 42.0 300 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= 22207.75 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