COVER INFORMATION Station: SHANGHAI (Code Sh ) Experiment: 3C66 field: multiple phase center correlation and blind searches Exp. Code: EP077 Schedule Version: 1.00 Processed by SCHED version: 9.40 Release Jan. 13, 2011. PI: Yurii Pidopryhora Address: JIVE Postbus 2 7990 AA Dwingeloo The Netherlands Phone: +31-521-596548 EMAIL: pidopryhora@jive.nl Fax: Phone during observation: +31-528-353211 Observing mode: Notes: COVER LETTER: An L-band observation of the 3C 66 field in order to try a multiple simultaneous phase center capability of the SFXC software correlator. The targets were chosen to both provide us with a useful test dataset and because of their potential scientific interest. This dataset would be especially useful for trying a "blind" search of compact sources -- a method of processing the entire primary beam area of a VLBI observation using a distributed search algorithm. Two sources 3C66A = J0222+4302 3C66B = J0223+4259 and a position in between them 3C66MID are observed. Since both 3C66A and 3C66B are bright sources, no observation of additional calibrators/fringe-finders is necessary. The observation time is split in half between observing the "nothing" midpoint and tilting from 3C66A to 3C66B in order to determine if pointing far off source offers any (dis)advantages for a multi phase center experient. * PCAL is OFF for this experiment * Schedule for SHANGHAI (Code Sh ) Page 2 3C66 field: multiple phase center correlation and blind searches UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Mon 31 Oct 2011 Day 304 --- Next scan frequencies: 1610.49 1610.49 1610.49 1610.49 1642.49 1642.49 1642.49 1642.49 1674.49 1674.49 1674.49 1674.49 1706.49 1706.49 1706.49 1706.49 Next BBC frequencies: 689.51 689.51 689.51 689.51 657.51 657.51 657.51 657.51 625.51 625.51 625.51 625.51 593.51 593.51 593.51 593.51 Next scan bandwidths: 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16 00 00 J0223+4259 02 43 14 77.5 -16.4 0.3 160.7 0 0 16 00 00 16 15 00 =UG01841 02 58 16 76.3 -27.3 0.6 147.5 900 116 16 00 01 16 15 30 3C66MID 02 58 46 76.2 -27.7 0.6 147.0 27 116 16 15 30 16 30 00 --- 03 13 19 74.5 -36.0 0.8 136.5 870 228 16 15 31 16 30 30 J0222+4302 03 13 49 74.4 -36.3 0.8 136.1 27 228 16 30 30 16 45 00 =0219+428 03 28 21 72.4 -42.5 1.1 127.6 870 341 16 30 31 16 45 30 3C66MID 03 28 51 72.4 -42.6 1.1 127.5 27 341 16 45 30 17 00 00 --- 03 43 23 70.2 -47.3 1.3 120.6 870 453 16 45 31 17 00 30 J0223+4259 03 43 54 70.2 -47.4 1.3 120.4 27 453 17 00 30 17 15 00 =UG01841 03 58 26 67.8 -50.8 1.6 114.8 870 565 17 00 31 17 15 30 3C66MID 03 58 56 67.7 -50.9 1.6 114.5 27 565 17 15 30 17 30 00 --- 04 13 28 65.2 -53.4 1.8 109.7 870 677 17 15 31 17 30 30 J0222+4302 04 13 59 65.1 -53.5 1.8 109.6 27 677 17 30 30 17 45 00 =0219+428 04 28 31 62.5 -55.3 2.1 105.5 870 790 17 30 31 17 45 30 3C66MID 04 29 01 62.5 -55.4 2.1 105.3 27 790 17 45 30 18 00 00 --- 04 43 33 59.9 -56.6 2.3 101.7 870 902 17 45 31 18 00 30 J0223+4259 04 44 03 59.9 -56.7 2.3 101.6 27 902 18 00 30 18 15 00 =UG01841 04 58 36 57.3 -57.6 2.6 98.4 870 1014 18 00 31 18 15 30 3C66MID 04 59 06 57.1 -57.6 2.6 98.3 27 1014 18 15 30 18 30 00 --- 05 13 38 54.5 -58.2 2.8 95.3 870 1126 18 15 31 18 30 30 J0222+4302 05 14 08 54.4 -58.1 2.8 95.2 27 1126 18 30 30 18 45 00 =0219+428 05 28 41 51.7 -58.4 3.1 92.5 870 1239 18 30 31 Schedule for SHANGHAI (Code Sh ) Page 3 3C66 field: multiple phase center correlation and blind searches UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Mon 31 Oct 2011 Day 304 --- 18 45 30 3C66MID 05 29 11 51.7 -58.5 3.1 92.4 27 1239 18 45 30 19 00 00 --- 05 43 43 49.0 -58.6 3.3 89.9 870 1351 18 45 31 19 00 30 J0223+4259 05 44 13 49.0 -58.6 3.3 89.8 27 1351 19 00 30 19 15 00 =UG01841 05 58 46 46.3 -58.5 3.6 87.4 870 1463 19 00 31 19 15 30 3C66MID 05 59 16 46.2 -58.5 3.6 87.3 27 1463 19 15 30 19 30 00 --- 06 13 48 43.5 -58.2 3.8 85.0 870 1575 19 15 31 19 30 30 J0222+4302 06 14 18 43.4 -58.2 3.8 84.9 27 1575 19 30 30 19 45 00 =0219+428 06 28 51 40.7 -57.8 4.1 82.7 870 1688 19 30 31 19 45 30 3C66MID 06 29 21 40.7 -57.8 4.1 82.6 27 1688 19 45 30 20 00 00 --- 06 43 53 38.1 -57.3 4.3 80.5 870 1800 19 45 31 20 00 30 J0223+4259 06 44 23 38.0 -57.3 4.3 80.4 27 1800 20 00 30 20 15 00 =UG01841 06 58 56 35.4 -56.7 4.6 78.3 870 1912 20 00 31 20 15 30 3C66MID 06 59 26 35.3 -56.6 4.6 78.2 27 1912 20 15 30 20 30 00 --- 07 13 58 32.7 -55.9 4.8 76.1 870 2024 20 15 31 20 30 30 J0222+4302 07 14 28 32.6 -55.8 4.9 76.0 27 2024 20 30 30 20 45 00 =0219+428 07 29 00 30.0 -55.0 5.1 73.9 870 2137 20 30 31 20 45 30 3C66MID 07 29 31 30.0 -55.1 5.1 73.9 27 2137 20 45 30 21 00 00 --- 07 44 03 27.4 -54.2 5.3 71.8 870 2249 20 45 31 21 00 30 J0223+4259 07 44 33 27.4 -54.2 5.3 71.8 27 2249 21 00 30 21 15 00 =UG01841 07 59 05 24.9 -53.2 5.6 69.7 870 2361 21 00 31 21 15 30 3C66MID 07 59 35 24.7 -53.1 5.6 69.6 27 2361 21 15 30 21 30 00 --- 08 14 08 22.3 -52.1 5.8 67.6 870 2473 21 15 31 21 30 30 J0222+4302 08 14 38 22.1 -52.0 5.9 67.5 27 2473 21 30 30 21 45 00 =0219+428 08 29 10 19.7 -50.8 6.1 65.4 870 2586 21 30 31 21 45 30 3C66MID 08 29 40 19.7 -50.9 6.1 65.4 27 2586 21 45 30 22 00 00 --- 08 44 13 17.3 -49.6 6.3 63.3 870 2698 21 45 31 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: sess311.L1024 Matching groups in /aps3/sched9.4/catalogs/freq.dat: sh18cm Huang Xinyong 27Sept05 ****** Only 244.98 of 256.00 MHz total bandwidth is within the IFs in the setup file before any FREQ or DOPPLER shifts. Setup group: 7 Station: SHANGHAI Total bit rate: 1024 Format: MKIV1:2 Bits per sample: 2 Sample rate: 32.000 Number of channels: 16 DBE type: Speedup factor: 0.50 Disk used to record data. 1st LO= 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 Net SB= L L U U L L U U L L U U L L U U Pol. = RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP BBC = 1 2 1 2 3 4 3 4 5 6 5 6 7 8 7 8 BBC SB= U U L L U U L L U U L L U U L L IF = C A C A C A C A C A C A C A C A The following frequency sets based on this setup were used. Frequency Set: 10 Setup file default. Used pcal sets: 1 LO sum= 1610.49 1610.49 1610.49 1610.49 1642.49 1642.49 1642.49 1642.49 1674.49 1674.49 1674.49 1674.49 1706.49 1706.49 1706.49 1706.49 BBC fr= 689.51 689.51 689.51 689.51 657.51 657.51 657.51 657.51 625.51 625.51 625.51 625.51 593.51 593.51 593.51 593.51 Bandwd= 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 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, 66, 74, 82, 90, 67, 75, 83, 91 barrel=roll_off SOURCES USED IN RECORDING SCANS -- 3C66 field: multiple phase center correlation and blind searches 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). Scan hours are for recording scans only. Baseline hours are only counted for scans above horizon at both ends. Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) * 3C66MID 02 19 45.840245 * 02 22 55.500000 02 23 43.588166 0.00 42 47 11.87780 * 43 00 49.20000 43 04 11.18537 0.00 From catalog imbedded in main SCHED input file. a middle point between 3C66A and 3C66B 2.900 scan and 133.642 baseline hours in setup: sess311.L1024 * J0222+4302 02 19 29.982911 * 02 22 39.611497 02 23 27.692846 0.04 0219+428 42 48 29.80839 * 43 02 07.79888 43 05 29.96491 0.04 J0222+43 /aps3/sched9.4/catalogs/sources.vlba GSFC 2010a astro solution 1028 Observations 1.450 scan and 70.325 baseline hours in setup: sess311.L1024 * J0223+4259 02 20 01.720100 * 02 23 11.411264 02 23 59.506312 0.33 UG01841 42 45 54.73283 * 42 59 31.38469 43 02 53.18888 0.30 0220+427 /aps3/sched9.4/catalogs/sources.vlba GSFC 2010a astro solution 45 Observations 1.458 scan and 65.867 baseline hours in setup: sess311.L1024 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) 3C66MID 151.1 J0222+4302 151.1 J0223+4259 151.1 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