COVER INFORMATION Station: VLBA_OV (Code Ov ) Experiment: Parsec scale structure in ISM and the nature of 21-cm absorbers Exp. Code: GG074 Schedule Version: 1.00 Processed by SCHED version: 9.40 Release Jan. 13, 2011. PI: Neeraj Gupta Address: ASTRON Postbus 2 7990 AA Dwingeloo The Netherlands Phone: +31-521-595782 EMAIL: gupta@astron.nl Fax: Phone during observation: +31-521-595782 Observing mode: Notes: Concerning this schedule you can also contact Yurii Pidopryhora, pidopryhora@jive.nl, +31-521-596548 COVER LETTER: Block schedule quote: GG074 Eb Wb Jb1 On25 Mc Tr -- EVN Eu 159 1700(08/06)-0300(09/06) 21cm (1396.5 MHz) US 159 1700(08/06)-0500(09/06) VLBA Target: J1243+4043 Delay calibrator: J1242+3751 Bandpass claibrators/fringe-finders: 4C39.25, 3C345 WSRT calibrator: 3C286 In this experiment we observe an HI absorber (with z~0.0169) in front of a ~196 mJy quasar. The peak absorption is at ~1396.47 MHz, which is centered at one of the observation subbands (with 0 frequency offset). !!! PCAL is OFF for this experiment !!! Schedule for VLBA_OV (Code Ov ) Page 2 Parsec scale structure in ISM and the nature of 21-cm absorbers 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 ---------------------------------------------------------------------------------------- --- Wed 8 Jun 2011 Day 159 --- Next scan frequencies: 1390.83 1390.83 1394.77 1394.77 1398.70 1398.70 1402.63 1402.63 Next BBC frequencies: 709.17 709.17 705.23 705.23 701.30 701.30 697.37 697.37 Next scan bandwidths: 4.00 4.00 4.00 4.00 4.00 4.00 4.00 4.00 19 04 50 4C39.25 04 18 59 31.2 62.4 -5.1 -65.2 0 0 19 04 45 19 09 50 --- 04 24 00 32.1 62.8 -5.1 -65.7 300 5 19 04 46 20 39 50 J1243+4043 05 54 15 15.2 50.1 -6.8 -53.7 5331 5 20 39 45 20 51 20 --- 06 05 47 17.0 51.4 -6.6 -55.2 690 16 20 39 46 20 51 50 J1243+4043 06 06 17 17.1 51.5 -6.6 -55.2 24 16 20 51 45 21 03 20 --- 06 17 49 18.9 52.8 -6.4 -56.7 690 27 20 51 46 21 04 20 J1242+3751 06 18 49 17.7 55.5 -6.4 -56.2 49 27 21 04 15 21 06 20 =1240+381 06 20 49 18.0 55.8 -6.4 -56.4 120 29 21 04 16 21 07 20 J1243+4043 06 21 49 19.6 53.2 -6.4 -57.2 49 29 21 07 15 21 18 50 --- 06 33 21 21.4 54.5 -6.2 -58.7 690 41 21 07 16 21 19 20 J1243+4043 06 33 51 21.5 54.5 -6.2 -58.7 24 41 21 19 15 21 30 50 --- 06 45 23 23.4 55.7 -6.0 -60.2 690 52 21 19 16 21 31 50 J1242+3751 06 46 23 22.3 58.6 -6.0 -59.3 49 52 21 31 45 21 33 50 =1240+381 06 48 24 22.6 58.9 -5.9 -59.6 120 54 21 31 46 21 38 00 4C39.25 06 52 34 59.7 74.6 -2.6 -80.9 166 54 21 37 55 21 43 00 --- 06 57 35 60.6 74.9 -2.5 -81.4 300 59 21 37 56 21 47 10 J1243+4043 07 01 46 26.1 57.4 -5.7 -62.1 169 59 21 47 05 21 58 40 --- 07 13 18 28.0 58.5 -5.5 -63.5 690 70 21 47 06 21 59 10 J1243+4043 07 13 48 28.1 58.5 -5.5 -63.6 24 70 21 59 05 22 10 40 --- 07 25 20 30.1 59.6 -5.3 -64.9 690 81 21 59 06 22 11 40 J1242+3751 07 26 20 29.2 62.8 -5.3 -63.7 50 81 22 11 35 22 13 40 =1240+381 07 28 20 29.6 63.0 -5.3 -63.9 120 83 22 11 36 22 14 40 J1243+4043 07 29 20 30.8 60.0 -5.3 -65.4 50 83 22 14 35 22 26 10 --- 07 40 52 32.8 61.0 -5.1 -66.7 690 94 22 14 36 Schedule for VLBA_OV (Code Ov ) Page 3 Parsec scale structure in ISM and the nature of 21-cm absorbers 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 ---------------------------------------------------------------------------------------- --- Wed 8 Jun 2011 Day 159 --- 22 26 40 J1243+4043 07 41 22 32.9 61.1 -5.1 -66.8 24 94 22 26 35 22 38 10 --- 07 52 54 34.9 62.1 -4.9 -68.1 690 106 22 26 36 22 39 10 J1242+3751 07 53 54 34.1 65.5 -4.8 -66.5 50 106 22 39 05 22 41 10 =1240+381 07 55 55 34.5 65.7 -4.8 -66.7 120 108 22 39 06 22 42 10 J1243+4043 07 56 55 35.6 62.4 -4.8 -68.5 50 108 22 42 05 22 53 40 --- 08 08 27 37.6 63.4 -4.6 -69.8 690 119 22 42 06 22 54 10 J1243+4043 08 08 57 37.7 63.4 -4.6 -69.9 24 119 22 54 05 23 05 40 --- 08 20 29 39.8 64.4 -4.4 -71.2 690 130 22 54 06 23 06 40 J1242+3751 08 21 29 39.2 68.1 -4.4 -69.2 50 130 23 06 35 23 08 40 =1240+381 08 23 29 39.6 68.3 -4.3 -69.4 120 132 23 06 36 23 09 40 J1243+4043 08 24 29 40.5 64.7 -4.3 -71.6 50 132 23 09 35 23 21 10 --- 08 36 01 42.6 65.6 -4.1 -72.9 690 143 23 09 36 23 21 40 J1243+4043 08 36 31 42.7 65.6 -4.1 -73.0 24 143 23 21 35 23 33 10 --- 08 48 03 44.8 66.5 -3.9 -74.3 690 154 23 21 36 23 34 10 J1242+3751 08 49 03 44.3 70.5 -3.9 -71.8 49 154 23 34 05 23 36 10 =1240+381 08 51 04 44.7 70.7 -3.9 -71.9 120 156 23 34 06 23 37 10 J1243+4043 08 52 04 45.5 66.8 -3.9 -74.7 49 156 23 37 05 23 48 40 --- 09 03 36 47.6 67.6 -3.7 -76.0 690 168 23 37 06 --- Start: Wed 8 Jun 2011 Day 159 -- Stop: Thu 9 Jun 2011 Day 160 --- 23 49 10 J1243+4043 09 04 06 47.7 67.6 -3.7 -76.1 24 168 23 49 05 00 00 40 --- 09 15 38 49.8 68.4 -3.5 -77.4 690 179 23 49 06 00 01 40 J1242+3751 09 16 38 49.5 72.8 -3.4 -74.3 49 179 00 01 35 00 03 40 =1240+381 09 18 38 49.9 73.0 -3.4 -74.5 120 181 00 01 36 00 04 40 J1243+4043 09 19 38 50.6 68.6 -3.4 -77.8 49 181 00 04 35 00 16 10 --- 09 31 10 52.7 69.3 -3.2 -79.2 690 192 00 04 36 00 16 40 J1243+4043 09 31 40 52.8 69.4 -3.2 -79.2 24 192 00 16 35 00 28 10 --- 09 43 12 55.0 70.0 -3.0 -80.6 690 203 00 16 36 00 29 10 J1242+3751 09 44 12 54.8 75.1 -3.0 -76.8 49 203 00 29 05 00 31 10 =1240+381 09 46 13 55.2 75.2 -3.0 -76.9 120 205 00 29 06 Schedule for VLBA_OV (Code Ov ) Page 4 Parsec scale structure in ISM and the nature of 21-cm absorbers 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 ---------------------------------------------------------------------------------------- --- Thu 9 Jun 2011 Day 160 --- 00 46 10 J1243+4043 10 01 15 58.4 70.9 -2.7 -82.8 889 205 00 46 05 00 57 40 --- 10 12 47 60.5 71.4 -2.5 -84.2 690 217 00 46 06 00 58 10 J1243+4043 10 13 17 60.6 71.4 -2.5 -84.3 24 217 00 58 05 01 09 40 --- 10 24 49 62.8 71.8 -2.3 -85.8 690 228 00 58 06 01 10 40 J1242+3751 10 25 49 62.9 78.2 -2.3 -80.5 48 228 01 10 35 01 12 40 =1240+381 10 27 49 63.3 78.3 -2.3 -80.6 120 230 01 10 36 01 13 40 J1243+4043 10 28 50 63.6 71.9 -2.3 -86.4 48 230 01 13 35 01 25 10 --- 10 40 22 65.7 72.2 -2.1 -88.0 690 241 01 13 36 01 25 40 J1243+4043 10 40 52 65.8 72.2 -2.1 -88.1 24 241 01 25 35 01 37 10 --- 10 52 24 68.0 72.3 -1.9 -89.9 690 252 01 25 36 01 38 10 J1242+3751 10 53 24 68.3 80.1 -1.8 -83.0 47 252 01 38 05 01 40 10 =1240+381 10 55 24 68.6 80.2 -1.8 -83.1 120 254 01 38 06 01 46 10 J1243+4043 11 01 25 69.7 72.2 -1.7 -91.4 346 254 01 46 05 01 55 10 --- 11 10 26 71.5 72.0 -1.6 -93.0 540 263 01 46 06 01 55 40 J1243+4043 11 10 57 71.5 72.0 -1.6 -93.1 24 263 01 55 35 02 04 50 --- 11 20 08 73.3 71.6 -1.4 -95.0 550 272 01 55 36 02 05 50 J1242+3751 11 21 08 73.7 81.8 -1.4 -85.6 45 272 02 05 45 02 07 50 =1240+381 11 23 09 74.1 81.9 -1.3 -85.8 120 274 02 05 46 02 08 50 J1243+4043 11 24 09 74.0 71.4 -1.3 -95.9 45 274 02 08 45 02 17 20 --- 11 32 40 75.6 70.6 -1.2 -98.1 510 282 02 08 46 02 17 50 J1243+4043 11 33 10 75.7 70.5 -1.2 -98.2 24 282 02 17 45 02 26 20 --- 11 41 42 77.3 69.4 -1.0 -100.7 510 291 02 17 46 02 27 20 J1242+3751 11 42 42 78.0 82.7 -1.0 -88.0 43 291 02 27 15 02 29 20 =1240+381 11 44 42 78.4 82.8 -1.0 -88.2 120 293 02 27 16 02 30 20 J1243+4043 11 45 42 78.1 68.7 -1.0 -102.0 42 293 02 30 15 02 38 50 --- 11 54 14 79.6 66.7 -0.8 -105.4 510 301 02 30 16 02 39 20 J1243+4043 11 54 44 79.7 66.6 -0.8 -105.6 24 301 02 39 15 02 47 50 --- 12 03 15 81.3 63.6 -0.7 -109.9 510 309 02 39 16 02 48 50 J1242+3751 12 04 15 82.2 82.9 -0.7 -91.1 38 309 02 48 45 02 50 50 =1240+381 12 06 16 82.6 82.9 -0.6 -91.5 120 311 02 48 46 Schedule for VLBA_OV (Code Ov ) Page 5 Parsec scale structure in ISM and the nature of 21-cm absorbers 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 ---------------------------------------------------------------------------------------- --- Thu 9 Jun 2011 Day 160 --- 02 55 40 3C345 12 11 06 38.0 64.8 -4.5 -69.6 188 311 02 55 35 03 00 00 --- 12 15 27 38.8 65.1 -4.5 -70.1 260 315 02 55 36 03 02 30 J1243+4043 12 17 58 83.8 54.3 -0.4 -121.6 48 315 03 02 25 03 14 00 --- 12 29 29 85.5 39.1 -0.3 -138.5 690 327 03 02 26 03 14 30 J1243+4043 12 30 00 85.6 38.2 -0.2 -139.5 23 327 03 14 25 03 26 00 --- 12 41 31 86.5 9.3 0.0 -170.2 690 338 03 14 26 03 26 50 J1242+3751 12 42 22 89.4 20.8 0.0 -159.0 26 338 03 26 45 03 28 50 =1240+381 12 44 22 89.4 -18.3 0.0 161.5 120 340 03 26 46 03 29 50 J1243+4043 12 45 22 86.6 -2.7 0.0 177.1 39 340 03 29 45 03 41 20 --- 12 56 54 85.8 -34.1 0.2 144.0 690 351 03 29 46 03 41 50 J1243+4043 12 57 24 85.7 -35.1 0.2 142.9 23 351 03 41 45 03 53 20 --- 13 08 56 84.1 -52.2 0.4 124.0 690 362 03 41 46 03 54 10 J1242+3751 13 09 46 84.7 -81.9 0.4 94.1 21 362 03 54 05 03 56 10 =1240+381 13 11 46 84.4 -82.2 0.5 93.5 120 364 03 54 06 03 57 10 J1243+4043 13 12 47 83.5 -55.8 0.5 119.8 33 364 03 57 05 04 08 40 --- 13 24 18 81.5 -63.0 0.7 110.8 690 376 03 57 06 04 09 10 J1243+4043 13 24 48 81.4 -63.2 0.7 110.5 24 376 04 09 05 04 20 40 --- 13 36 20 79.4 -67.1 0.9 104.7 690 387 04 09 06 04 21 30 J1242+3751 13 37 11 79.3 -82.9 0.9 88.9 31 387 04 21 25 04 23 30 =1240+381 13 39 11 78.9 -82.9 0.9 88.6 120 389 04 21 26 04 24 30 J1243+4043 13 40 11 78.7 -68.1 0.9 103.2 41 389 04 24 25 04 36 00 --- 13 51 43 76.5 -70.0 1.1 99.3 690 400 04 24 26 04 36 30 J1243+4043 13 52 13 76.4 -70.1 1.1 99.2 24 400 04 36 25 04 48 00 --- 14 03 45 74.2 -71.3 1.3 96.2 690 411 04 36 26 04 48 50 J1242+3751 14 04 35 73.9 -81.8 1.4 85.7 35 411 04 48 45 04 50 50 =1240+381 14 06 35 73.5 -81.7 1.4 85.5 120 413 04 48 46 04 55 10 3C345 14 10 56 60.3 73.1 -2.5 -82.6 142 413 04 55 05 05 00 00 --- 14 15 47 61.2 73.4 -2.5 -83.1 290 418 04 55 06 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: sess211.H128 Matching groups in /aps3/sched9.4/catalogs/freq.dat: v20cm_1 FD and KP filtered below 1330. SC filtered above 1440 Setup group: 13 Station: VLBA_OV Total bit rate: 128 Format: VLBA1:1 Bits per sample: 2 Sample rate: 8.000 Number of channels: 8 DBE type: Speedup factor: 1.00 Disk used to record data. 1st LO= 2100.00 2100.00 2100.00 2100.00 2100.00 2100.00 2100.00 2100.00 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 = A C A C A C A C VLBA FE= 20cm omit 20cm omit VLBA Synth= 15.4 2.1 15.4 The following frequency sets based on this setup were used. Frequency Set: 14 Based on FREQ, BW, and/or DOPPLER in schedule. Used pcal sets: 1 LO sum= 1390.83 1390.83 1394.77 1394.77 1398.70 1398.70 1402.63 1402.63 BBC fr= 709.17 709.17 705.23 705.23 701.30 701.30 697.37 697.37 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, 6, 10, 14, 18, 22, 26, 30 barrel=roll_off SOURCES USED IN RECORDING SCANS -- Parsec scale structure in ISM and the nature of 21-cm absorbers 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) * J1243+4043 12 41 32.734570 * 12 43 55.781600 12 44 29.987313 0.00 41 00 22.94680 * 40 43 58.43500 40 40 17.96403 0.00 From catalog imbedded in main SCHED input file. Doppler based on heliocentric frame and optical definition. Velocities: 5051.90 5051.90 5051.90 5051.90 5051.90 5051.90 5051.90 5051.90 8.931 scan and 700.258 baseline hours in setup: sess211.H128 J0927+3902 09 23 55.319213 * 09 27 03.013934 09 27 46.245428 0.29 0923+392 39 15 23.56646 * 39 02 20.85186 38 59 24.55706 0.16 * 4C39.25 /aps3/sched9.4/catalogs/sources.vlba J0927+39 GSFC 2010a astro solution 231732 Observations Doppler based on other sources. 0.167 scan and 18.750 baseline hours in setup: sess211.H128 * J1242+3751 12 40 27.034314 * 12 42 51.369077 12 43 25.855934 0.04 1240+381 38 07 25.41734 * 37 51 00.02525 37 47 18.58321 0.03 J1242+37 /aps3/sched9.4/catalogs/sources.vlba GSFC 2010a astro solution 1290 Observations Doppler based on other sources. 0.800 scan and 62.633 baseline hours in setup: sess211.H128 J1331+3030 13 28 49.657759 * 13 31 08.288051 13 31 41.716249 0.19 * 3C286 30 45 58.64061 * 30 30 32.95925 30 27 03.00073 0.17 1328+307 /aps3/sched9.4/catalogs/sources.vlba J1331+30 GSFC 2010a astro solution 276 Observations Doppler based on other sources. 0.167 scan and 0.833 baseline hours in setup: sess211.H128 J1642+3948 16 41 17.606228 * 16 42 58.809965 16 43 24.330295 0.81 * 3C345 39 54 10.81494 * 39 48 36.99400 39 47 20.92672 0.54 1641+399 /aps3/sched9.4/catalogs/sources.vlba J1642+39 GSFC 2010a astro solution 52595 Observations Doppler based on other sources. 0.236 scan and 18.792 baseline hours in setup: sess211.H128 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) J1243+4043 92.0 4C39.25 57.0 J1242+3751 93.4 3C286 105.8 3C345 117.1 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