COVER INFORMATION Station: GBT_VLBA (Code Gb ) Experiment: TwoDimensional time Delay Measurement of Intra-Day Variable Sources. Exp. Code: bc162 Schedule Version: 2.00 Processed by SCHED version: 6.05 June 2006 PI: Giuseppe Cimo Address: Joint Institute for VLBI in Europe Postbus 2 7990 AA Dwingeloo - The Netherlands Phone: +31-(0)521 596545 EMAIL: cimo@jive.nl Fax: +31-(0)521 596539 Phone during observation: Observing mode: 256-8-2 3.6 and 6cm Notes: Schedule for GBT_VLBA (Code Gb ) Page 2 TwoDimensional time Delay Measurement of Intra-Day Variable Sources. 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. For disks, the footages are really the GBytes TPStart: Tape motion start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. 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) SYNC ---------------------------------------------------------------------------------------- --- Fri 23 Feb 2007 Day 54 --- Next scan frequencies: 8405.49 8405.49 8413.49 8413.49 8421.49 8421.49 8429.49 8429.49 Next BBC frequencies: 694.51 694.51 686.51 686.51 678.51 678.51 670.51 670.51 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 11 00 00 J1800+3848 15 52 29 65.1 79.0 -2.1 -80.7 0 1 1 0 11 00 00 11 05 00 =1758+388 15 57 29 66.1 79.4 -2.1 -81.1 300 F 1 10 11 00 18 11 05 00 J1819+3845 15 57 29 62.4 78.1 -2.4 -79.3 -38 1 1 10 11 05 00 11 20 00 --- 16 12 32 65.3 79.2 -2.1 -80.6 862 F 1 39 11 05 00 11 20 00 J1821+3945 16 12 32 64.9 76.7 -2.2 -82.6 -34 1 1 39 11 20 00 11 25 00 =1820+397 16 17 33 65.9 77.0 -2.1 -83.1 266 F 1 48 11 20 00 11 25 00 J1819+3845 16 17 33 66.2 79.6 -2.0 -81.1 -35 1 1 48 11 25 00 11 40 00 --- 16 32 35 69.1 80.7 -1.8 -82.4 865 F 1 77 11 25 00 11 40 00 J1821+3945 16 32 35 68.8 77.7 -1.8 -84.8 -35 1 1 77 11 40 00 11 45 00 =1820+397 16 37 36 69.7 78.0 -1.7 -85.4 265 F 1 87 11 40 00 11 45 00 J1819+3845 16 37 36 70.1 81.1 -1.7 -82.8 -36 1 1 87 11 45 00 12 00 00 --- 16 52 38 73.0 82.1 -1.5 -84.2 864 F 1 116 11 45 00 12 00 00 J1821+3945 16 52 38 72.6 78.6 -1.5 -87.2 -37 1 1 116 12 00 00 12 05 00 =1820+397 16 57 39 73.6 78.7 -1.4 -87.9 263 F 1 126 12 00 00 12 05 00 J1800+3848 16 57 39 77.7 83.4 -1.0 -86.8 -40 1 1 126 12 05 00 12 10 00 =1758+388 17 02 40 78.7 83.6 -1.0 -87.3 260 F 1 135 12 05 00 12 10 00 J1819+3845 17 02 40 75.0 82.8 -1.3 -85.1 -38 1 1 135 12 10 00 12 25 00 --- 17 17 43 77.9 83.7 -1.0 -86.6 862 F 1 165 12 10 00 12 25 00 J1821+3945 17 17 43 77.4 78.9 -1.1 -90.9 -40 1 1 165 12 25 00 12 30 00 =1820+397 17 22 43 78.4 78.8 -1.0 -91.8 260 F 1 174 12 25 00 12 30 00 J1819+3845 17 22 43 78.9 83.9 -0.9 -87.2 -40 1 1 174 12 30 00 12 45 00 --- 17 37 46 81.8 84.5 -0.7 -88.9 860 F 1 203 12 30 00 12 45 00 J1821+3945 17 37 46 81.3 77.7 -0.7 -95.2 -43 1 1 203 12 45 00 12 50 00 =1820+397 17 42 47 82.2 77.0 -0.7 -96.7 257 F 1 213 12 45 00 Schedule for GBT_VLBA (Code Gb ) Page 3 TwoDimensional time Delay Measurement of Intra-Day Variable Sources. 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. For disks, the footages are really the GBytes TPStart: Tape motion start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. 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) SYNC ---------------------------------------------------------------------------------------- --- Fri 23 Feb 2007 Day 54 --- 12 50 00 J1819+3845 17 42 47 82.8 84.6 -0.6 -89.6 -45 1 1 213 12 50 00 13 05 00 --- 17 57 49 85.7 84.1 -0.4 -92.5 855 F 1 242 12 50 00 13 05 00 J1821+3945 17 57 49 85.1 72.4 -0.4 -103.8 -52 1 1 242 13 05 00 13 10 00 =1820+397 18 02 50 86.0 69.0 -0.3 -107.9 248 F 1 252 13 05 00 13 10 00 J1819+3845 18 02 50 86.7 83.2 -0.3 -94.1 -56 1 1 252 13 10 00 13 25 00 --- 18 17 52 89.5 48.0 0.0 -131.7 844 F 1 281 13 10 00 13 25 00 J1821+3945 18 17 52 88.4 32.0 -0.1 -147.3 -59 1 1 281 13 25 00 13 30 00 =1820+397 18 22 53 88.7 -5.5 0.0 174.4 241 F 1 290 13 25 00 13 30 00 J1819+3845 18 22 53 89.3 -63.2 0.1 116.3 -128 1 1 290 13 30 00 13 45 00 --- 18 37 56 86.4 -83.6 0.3 93.6 772 F 1 319 13 30 00 13 45 00 J1821+3945 18 37 56 86.7 -65.2 0.3 112.3 -63 1 1 319 13 45 00 13 50 00 =1820+397 18 42 57 85.8 -70.1 0.3 106.7 237 F 1 329 13 45 00 13 50 00 J1819+3845 18 42 57 85.4 -84.2 0.4 92.1 -56 1 1 329 13 50 00 14 05 00 --- 18 57 59 82.5 -84.6 0.6 89.4 844 F 1 358 13 50 00 14 05 00 J1821+3945 18 57 59 82.9 -76.3 0.6 98.0 -46 1 1 358 14 05 00 14 10 00 =1820+397 19 03 00 82.0 -77.3 0.7 96.3 254 F 1 368 14 05 00 14 10 00 J1800+3848 19 03 00 77.8 -83.4 1.0 86.8 -42 1 1 368 14 10 00 14 15 00 =1758+388 19 08 01 76.9 -83.1 1.1 86.3 258 F 1 377 14 10 00 14 15 00 J1819+3845 19 08 01 80.6 -84.3 0.8 88.1 -38 1 1 377 14 15 00 14 30 00 --- 19 23 03 77.6 -83.6 1.1 86.5 862 F 1 406 14 15 00 14 30 00 J1821+3945 19 23 03 78.1 -78.8 1.0 91.6 -40 1 1 406 14 30 00 14 35 00 =1820+397 19 28 04 77.2 -78.9 1.1 90.7 260 F 1 416 14 30 00 14 35 00 J1819+3845 19 28 04 76.7 -83.3 1.1 86.0 -39 1 1 416 14 35 00 14 45 00 --- 19 38 06 74.7 -82.7 1.3 85.0 561 F 1 435 14 35 00 14 45 00 J1821+3945 19 38 06 75.2 -78.9 1.3 89.1 -37 1 1 435 14 45 00 14 50 00 =1820+397 19 43 06 74.3 -78.8 1.3 88.4 263 F 1 445 14 45 00 14 50 00 J1819+3845 19 43 06 73.7 -82.4 1.4 84.5 -37 1 1 445 14 50 00 15 00 00 --- 19 53 08 71.8 -81.7 1.6 83.6 563 F 1 464 14 50 00 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: /home/arana/cwalker/sched/setups/v4cm-256-8-2.set Matches group gbt4cmb in /home/arana/cwalker/sched/catalogs/freq.dat LO1=11.350, LO2=12.75, LO3=10.5 Setup group: 1 Station: GBT_VLBA Total bit rate: 256 Format: VLBA1:2 Bits per sample: 2 Sample rate: 16.000 Number of channels: 8 Speedup factor: 1.00 Disk used to record data. 1st LO= 9100.00 9100.00 9100.00 9100.00 9100.00 9100.00 9100.00 9100.00 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= L L L L L L L L IF = B D B D B D B D The following frequency sets based on this setup were used. Frequency Set: 1 Setup file default. Used pcal sets: 1 LO sum= 8405.49 8405.49 8413.49 8413.49 8421.49 8421.49 8429.49 8429.49 BBC fr= 694.51 694.51 686.51 686.51 678.51 678.51 670.51 670.51 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 -- TwoDimensional time Delay Measurement of Intra-Day Variable Sources. 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) * J1800+3848 17 58 44.703953 * 18 00 24.765362 18 00 38.459229 0.26 1758+388 38 48 32.47356 * 38 48 30.69754 38 48 05.41887 0.40 J1800+38 /home/arana/cwalker/sched/catalogs/sources.vlba VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro 0.250 scan hours, 12.213 baseline hours above horizon. * J1819+3845 18 17 46.175701 * 18 19 26.547379 18 19 40.127037 0.31 38 43 40.47037 * 38 45 01.78615 38 44 49.10023 0.51 /home/arana/cwalker/sched/catalogs/sources.vlba VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro 2.833 scan hours, 145.283 baseline hours above horizon. * J1821+3945 18 20 21.240613 * 18 21 59.700620 18 22 12.967190 2.05 1820+397 39 44 27.15459 * 39 45 59.65691 39 45 48.52510 2.21 J1821+39 /home/arana/cwalker/sched/catalogs/sources.vlba VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro 0.917 scan hours, 45.484 baseline hours above horizon. 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) J1800+3848 78.3 J1819+3845 74.9 J1821+3945 75.0 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