COVER INFORMATION Station: VLBA_NL (Code Nl ) Experiment: Something Interesting is Happening in NGC4258 Exp. Code: BG145A 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_NL (Code Nl ) 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) ---------------------------------------------------------------------------------------- --- Thu 19 Feb 2004 Day 50 --- Next scan frequencies: 22208.03 22208.03 22197.65 22197.65 22126.67 22126.67 22111.84 22111.84 Next BBC frequencies: 708.03 708.03 697.65 697.65 626.67 626.67 611.84 611.84 Next scan bandwidths: 4.00 4.00 4.00 4.00 4.00 4.00 4.00 4.00 03 53 39 4C39.25 07 41 11 69.7 88.9 -1.8 -73.7 0 1 1 0 03 53 39 03 58 40 --- 07 46 12 70.6 89.7 -1.7 -73.7 300 F 1 2001 04 00 39 NGC4258 07 48 12 42.9 59.0 -4.5 -70.5 58 1 1 2001 04 00 39 04 17 39 --- 08 05 15 45.7 60.3 -4.2 -72.7 1020 F 1 8803 04 19 39 NGC4258 08 07 15 46.0 60.5 -4.2 -73.0 113 1 1 8803 04 19 39 04 41 39 --- 08 29 19 49.6 61.9 -3.8 -76.0 1320 F 1 17605 04 43 39 4C39.25 08 31 19 79.0 99.8 -0.9 -71.1 55 1 2 17605 04 43 39 04 48 39 --- 08 36 20 79.9 101.6 -0.8 -70.1 300 R 1 15604 04 50 39 NGC4258 08 38 20 51.1 62.5 -3.7 -77.2 56 1 2 15604 04 50 39 05 07 39 --- 08 55 23 53.9 63.5 -3.4 -79.6 1020 R 1 8803 05 09 39 NGC4258 08 57 23 54.3 63.6 -3.4 -79.8 113 1 2 8803 05 09 39 05 31 39 --- 09 19 27 58.0 64.6 -3.0 -83.1 1320 R 1 0 05 33 39 4C39.25 09 21 27 87.0 157.4 -0.1 -21.7 52 1 3 0 05 33 39 05 38 39 --- 09 26 28 87.2 176.5 0.0 -3.4 300 F 1 2001 05 40 39 NGC4258 09 28 28 59.5 64.9 -2.8 -84.4 39 1 3 2001 05 40 39 05 57 39 --- 09 45 31 62.4 65.3 -2.6 -87.2 1020 F 1 8803 05 59 39 NGC4258 09 47 31 62.7 65.3 -2.5 -87.5 113 1 3 8803 05 59 39 06 21 39 --- 10 09 35 66.4 65.4 -2.2 -91.5 1320 F 1 17605 06 23 39 4C39.25 10 11 35 81.1 255.6 0.7 68.4 -13 1 4 17605 06 23 39 06 28 39 --- 10 16 36 80.2 257.7 0.8 69.7 287 R 1 15604 06 30 39 NGC4258 10 18 36 68.0 425.2 -2.0 -93.3 2 1 4 15604 06 30 39 06 47 39 --- 10 35 39 70.8 424.5 -1.7 -97.2 1020 R 1 8803 06 49 38 NGC4258 10 37 39 71.2 424.4 -1.7 -97.7 113 1 4 8803 06 49 38 07 11 39 --- 10 59 43 74.9 421.9 -1.3 -104.0 1320 R 1 0 Schedule for VLBA_NL (Code Nl ) 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) ---------------------------------------------------------------------------------------- --- Thu 19 Feb 2004 Day 50 --- 07 13 38 4C39.25 11 01 43 71.9 269.1 1.6 73.7 12 1 5 0 07 13 38 07 18 39 --- 11 06 44 70.9 270.0 1.7 73.7 300 F 1 2001 07 20 38 NGC4258 11 08 44 76.3 420.3 -1.2 -107.3 13 1 5 2001 07 20 38 07 37 39 --- 11 25 47 79.0 415.4 -0.9 -115.2 1020 F 1 8803 07 39 38 NGC4258 11 27 47 79.3 414.6 -0.9 -116.4 113 1 5 8803 07 39 38 08 01 39 --- 11 49 51 82.4 401.0 -0.5 -133.9 1320 F 1 17605 08 03 38 4C39.25 11 51 51 62.6 276.4 2.4 72.5 31 1 6 17605 08 03 38 08 08 38 --- 11 56 52 61.6 277.1 2.5 72.3 300 R 1 15604 08 10 38 NGC4258 11 58 52 83.4 391.6 -0.3 -144.9 37 1 6 15604 08 10 38 08 27 38 --- 12 15 55 84.5 365.8 -0.1 -173.7 1020 R 1 8803 08 29 38 NGC4258 12 17 55 84.5 362.2 0.0 -177.5 111 1 6 8803 08 29 38 08 51 38 --- 12 39 59 83.4 327.9 0.3 144.2 1320 R 1 0 08 54 38 1308+326 12 42 59 79.1 147.5 -0.5 -28.3 53 1 7 0 08 54 38 08 59 38 --- 12 48 00 79.5 152.6 -0.4 -23.9 300 F 1 2001 09 02 38 NGC4258 12 51 00 82.1 316.9 0.5 131.3 64 1 7 2001 09 02 38 09 19 38 --- 13 08 03 79.7 306.5 0.8 117.9 1020 F 1 8803 09 21 37 NGC4258 13 10 03 79.4 305.6 0.8 116.7 113 1 7 8803 09 21 37 09 43 38 --- 13 32 07 75.9 299.2 1.2 106.4 1320 F 1 17605 09 46 37 1308+326 13 35 07 79.4 209.2 0.4 25.5 113 1 8 17605 09 46 37 09 51 38 --- 13 40 08 78.9 214.2 0.5 29.7 300 R 1 15604 09 54 37 NGC4258 13 43 08 74.1 297.4 1.4 102.6 118 1 8 15604 09 54 37 10 11 37 --- 14 00 11 71.3 295.7 1.7 97.8 1020 R 1 8803 10 13 37 NGC4258 14 02 11 70.9 295.5 1.7 97.3 113 1 8 8803 10 13 37 10 35 37 --- 14 24 15 67.2 294.7 2.1 92.4 1320 R 1 0 10 38 37 1308+326 14 27 15 72.1 244.3 1.3 52.7 140 1 9 0 10 38 37 10 43 37 --- 14 32 16 71.2 246.4 1.4 53.9 300 F 1 2001 10 46 37 NGC4258 14 35 16 65.3 294.5 2.3 90.3 141 1 9 2001 10 46 37 11 03 37 --- 14 52 19 62.4 294.7 2.6 87.3 1020 F 1 8803 Schedule for VLBA_NL (Code Nl ) 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) ---------------------------------------------------------------------------------------- --- Thu 19 Feb 2004 Day 50 --- 11 05 36 NGC4258 14 54 19 62.1 294.7 2.6 87.0 113 1 9 8803 11 05 36 11 27 37 --- 15 16 23 58.4 295.3 3.0 83.5 1320 F 1 17605 11 30 36 1308+326 15 19 23 62.8 260.2 2.1 60.4 150 1 10 17605 11 30 36 11 35 36 --- 15 24 24 61.9 261.3 2.2 60.7 300 R 1 15604 11 38 36 NGC4258 15 27 24 56.5 295.8 3.1 81.8 151 1 10 15604 11 38 36 11 55 36 --- 15 44 27 53.7 296.6 3.4 79.3 1020 R 1 8803 11 57 36 NGC4258 15 46 27 53.3 296.7 3.5 79.1 113 1 10 8803 11 57 36 12 19 36 --- 16 08 31 49.7 298.0 3.8 76.0 1320 R 1 0 12 21 36 1308+326 16 10 31 53.3 270.0 3.0 61.9 95 1 11 0 12 21 36 12 26 36 --- 16 15 32 52.4 270.9 3.1 61.9 300 F 1 2001 12 28 36 NGC4258 16 17 32 48.2 298.6 4.0 74.8 95 1 11 2001 12 28 36 12 45 36 --- 16 34 35 45.4 299.8 4.3 72.5 1020 F 1 8803 12 47 36 NGC4258 16 36 35 45.1 299.9 4.3 72.3 113 1 11 8803 12 47 36 13 09 36 --- 16 58 39 41.6 301.6 4.7 69.4 1320 F 1 17605 13 11 36 1308+326 17 00 39 44.0 277.7 3.8 61.0 98 1 12 17605 13 11 36 13 16 36 --- 17 05 40 43.1 278.4 3.9 60.8 300 R 1 15604 13 18 36 NGC4258 17 07 40 40.1 302.4 4.8 68.2 98 1 12 15604 13 18 36 13 35 36 --- 17 24 43 37.5 303.8 5.1 66.0 1020 R 1 8803 13 37 35 NGC4258 17 26 43 37.2 304.0 5.1 65.7 113 1 12 8803 13 37 35 13 59 36 --- 17 48 47 33.8 306.0 5.5 62.8 1320 R 1 0 14 01 35 1308+326 17 50 47 34.9 284.6 4.7 58.7 99 1 13 0 14 01 35 14 06 36 --- 17 55 48 33.9 285.2 4.8 58.4 300 F 1 2001 14 08 35 NGC4258 17 57 48 32.4 306.8 5.6 61.6 99 1 13 2001 14 08 35 14 25 36 --- 18 14 51 29.9 308.5 5.9 59.4 1020 F 1 8803 14 27 35 NGC4258 18 16 51 29.6 308.7 6.0 59.1 114 1 13 8803 14 27 35 14 49 36 --- 18 38 55 26.5 311.0 6.3 56.1 1320 F 1 17605 14 51 35 1308+326 18 40 55 26.0 291.2 5.5 55.3 101 1 14 17605 14 51 35 14 56 35 --- 18 45 56 25.1 291.9 5.6 55.0 300 R 1 15604 Schedule for VLBA_NL (Code Nl ) 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) ---------------------------------------------------------------------------------------- --- Thu 19 Feb 2004 Day 50 --- 14 58 35 NGC4258 18 47 56 25.2 311.9 6.5 54.9 100 1 14 15604 14 58 35 15 15 35 --- 19 04 59 22.9 313.8 6.8 52.5 1020 R 1 8803 15 17 35 NGC4258 19 06 59 22.6 314.0 6.8 52.2 114 1 14 8803 15 17 35 15 34 35 --- 19 24 02 20.4 316.0 7.1 49.8 1020 R 1 2001 15 36 35 1308+326 19 26 02 18.3 297.4 6.3 51.6 101 1 14 2001 15 36 35 15 41 35 --- 19 31 03 17.5 298.1 6.3 51.2 300 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= 22208.03 22208.03 22197.65 22197.65 22126.67 22126.67 22111.84 22111.84 BBC fr= 708.03 708.03 697.65 697.65 626.67 626.67 611.84 611.84 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 11.104775 47 34 53.16919 * 47 18 14.30300 47 16 41.71239 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 19.671531 0923+392 39 15 23.56655 * 39 02 20.85195 39 01 18.77806 * 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 40.975677 * 1308+326 32 36 40.23888 * 32 20 43.78295 32 19 12.67422 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 134.9 4C39.25 150.9 1308+326 133.4 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