COVER INFORMATION Station: SHANGHAI (Code Sh ) Experiment: Structure changes in two Blazars - OQ530; 05May01 18:30 - 03:30 Exp. Code: EM043B Schedule Version: 2.00 Processed by SCHED version: Release of 30 Jan. 2001 PI: Franco Mantovani Address: Istituto di Radioastronomia Via P. Gobetti, 101 I-40129 Bologna Italy Phone: +39 51 6399377 EMAIL: fmantovani@ira.bo.cnr.it Fax: +39 51 6399431 Phone during observation: Observing mode: Continuum Notes: Schedule for SHANGHAI (Code Sh ) Page 2 Structure changes in two Blazars - OQ530; 05May01 18:30 - 03:30 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). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Tue 5 Jun 2001 Day 156 --- Next scan frequencies: 4960.49 4968.49 4976.49 4984.49 4992.49 5000.49 5008.49 5016.49 Next BBC frequencies: 760.49 768.49 776.49 784.49 792.49 800.49 808.49 816.49 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 18 32 00 1642+690 19 33 48 45.0 339.8 2.9 124.4 0 1 1 0 18 32 00 18 38 30 --- 19 40 19 44.5 339.3 3.0 122.6 390 F 1 2600 18 40 30 OQ530 19 42 20 30.1 318.4 5.4 77.5 70 1 1 2600 18 40 30 18 47 00 --- 19 48 51 29.2 318.6 5.5 76.3 390 F 1 5200 18 49 00 OQ530 19 50 51 28.9 318.7 5.5 75.9 117 1 1 5200 18 49 00 19 02 00 --- 20 03 53 27.0 319.3 5.7 73.5 780 F 1 10400 19 04 00 OQ530 20 05 53 26.8 319.4 5.8 73.2 117 1 1 10400 19 04 00 19 17 00 --- 20 18 56 25.0 320.0 6.0 70.8 780 F 1 15600 19 19 00 OQ530 20 20 56 24.7 320.1 6.0 70.4 117 1 2 15600 19 19 00 19 32 00 --- 20 33 58 22.9 320.9 6.2 68.1 780 R 1 10400 19 34 00 OQ530 20 35 58 22.6 321.0 6.3 67.7 117 1 2 10400 19 34 00 19 47 00 --- 20 49 01 20.9 321.8 6.5 65.4 780 R 1 5200 19 49 00 OQ530 20 51 01 20.6 321.9 6.5 65.0 117 1 2 5200 19 49 00 20 02 00 --- 21 04 03 18.9 322.8 6.7 62.7 780 R 1 0 20 04 00 OQ530 21 06 03 18.7 323.0 6.8 62.3 117 1 3 0 20 04 00 20 17 00 --- 21 19 05 17.0 323.9 7.0 60.0 780 F 1 5200 20 19 00 1642+690 21 21 06 36.1 335.4 4.6 96.5 54 1 3 5200 20 19 00 20 25 30 --- 21 27 37 35.5 335.3 4.8 94.9 390 F 1 7800 20 27 30 OQ530 21 29 37 15.7 324.8 7.2 58.0 52 1 3 7800 20 27 30 20 34 00 --- 21 36 08 14.9 325.3 7.3 56.9 390 F 1 10400 20 36 00 OQ530 21 38 09 14.6 325.5 7.3 56.5 117 1 3 10400 20 36 00 20 49 00 --- 21 51 11 13.1 326.6 7.5 54.1 780 F 1 15600 20 51 00 OQ530 21 53 11 12.8 326.7 7.6 53.7 117 1 4 15600 20 51 00 21 04 00 --- 22 06 13 11.3 327.9 7.8 51.3 780 R 1 10400 Schedule for SHANGHAI (Code Sh ) Page 3 Structure changes in two Blazars - OQ530; 05May01 18:30 - 03:30 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). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Tue 5 Jun 2001 Day 156 --- 21 06 00 OQ530 22 08 14 11.1 328.1 7.8 51.0 117 1 4 10400 21 06 00 21 19 00 --- 22 21 16 9.7 329.4 8.0 48.5 780 R 1 5200 21 21 00 OQ530 22 23 16 9.4 329.6 8.1 48.2 117 1 4 5200 21 21 00 21 34 00 --- 22 36 18 8.1 330.9 8.3 45.7 780 R 1 0 21 36 00 OQ530 22 38 18 7.9 331.1 8.3 45.3 117 1 5 0 21 36 00 21 49 00 --- 22 51 21 6.5 332.4 8.5 42.9 780 F 1 5200 21 51 00 OQ530 22 53 21 6.3 332.7 8.6 42.5 117 1 5 5200 21 51 00 22 04 00 --- 23 06 23 5.1 334.1 8.8 40.0 780 F 1 10400 22 19 00 1642+690 23 21 25 25.4 336.9 6.7 69.1 830 1 5 10400 22 19 00 22 25 30 --- 23 27 57 24.9 337.2 6.8 67.7 390 F 1 13000 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: /soft/astro/sched/setups/v6cm-128-8-1-L.set Matches group sh6cm in /usr/local/sched/catalogs/freq.dat from Huang Xinyong 170300, change in LO Setup group: 10 Station: SHANGHAI Total bit rate: 128 Format: MKIV1:4 Bits per sample: 1 Sample rate: 16.000 Number of channels: 8 Passes/head pos: 1 Speedup factor: 2.00 Tape speeds: Low density - 135.000 ips, High density - 80.00 ips Time per pass for 15800 ft, High density tapes is: 00:39:30 1st LO= 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 Net SB= U U U U U U U U Pol. = LCP LCP LCP LCP LCP LCP LCP LCP BBC = 1 2 3 4 5 6 7 8 BBC SB= U U U U U U U U IF = A A A A A A A A The following frequency sets based on this setup were used. Frequency Set: 10 Setup file default. Used pcal sets: 1 LO sum= 4960.49 4968.49 4976.49 4984.49 4992.49 5000.49 5008.49 5016.49 BBC fr= 760.49 768.49 776.49 784.49 792.49 800.49 808.49 816.49 Bandwd= 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 1 PCAL = 1MHZ PCALXB1= S1 S3 S5 S7 S1 S3 S5 S7 PCALXB2= S2 S4 S6 S8 S2 S4 S6 S8 PCALFR1= 510 510 510 510 6510 6510 6510 6510 PCALFR2= 510 510 510 510 6510 6510 6510 6510 Track assignments are: track1= 2, 10, 18, 26, 3, 11, 19, 27 barrel=roll_off SOURCE LIST -- Structure changes in two Blazars - OQ530; 05May01 18:30 - 03:30 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) * 3C286 13 28 49.657106 * 13 31 08.287400 13 31 12.132881 30 45 58.64038 * 30 30 32.95900 30 30 20.08222 From catalog imbedded in main SCHED input file. * OQ530 14 18 06.186963 * 14 19 46.597060 14 19 50.359739 54 36 58.06540 * 54 23 14.78780 54 23 07.55848 From catalog imbedded in main SCHED input file. J1642+6856 16 42 18.064904 * 16 42 07.848533 16 42 11.248830 * 1642+690 69 02 13.21711 * 68 56 39.75639 68 56 35.13475 J1642+68 /usr/local/sched/catalogs/sources.vlba USNO - Ref Frame 1998-6, Eubanks June 1998 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) 3C286 107.6 OQ530 96.0 1642+690 88.4 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