COVER INFORMATION Station: VLBA_MK (Code Mk ) 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_MK (Code Mk ) 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 21 38 00 4C39.25 04 23 51 23.0 55.0 -5.1 -82.5 0 0 21 37 55 21 43 00 --- 04 28 52 23.9 55.1 -5.0 -83.3 300 5 21 37 56 --- Thu 9 Jun 2011 Day 160 --- 00 04 40 J1243+4043 06 50 55 13.9 51.4 -5.9 -75.7 8446 5 00 04 35 00 16 10 --- 07 02 27 16.1 51.9 -5.7 -77.4 690 16 00 04 36 00 16 40 J1243+4043 07 02 57 16.2 51.9 -5.7 -77.5 24 16 00 16 35 00 28 10 --- 07 14 29 18.3 52.4 -5.5 -79.3 690 27 00 16 36 00 29 10 J1242+3751 07 15 30 18.1 55.4 -5.5 -78.6 50 27 00 29 05 00 31 10 =1240+381 07 17 30 18.5 55.5 -5.4 -78.9 120 29 00 29 06 00 46 10 J1243+4043 07 32 32 21.7 53.0 -5.2 -82.0 890 29 00 46 05 00 57 40 --- 07 44 04 23.8 53.3 -5.0 -83.8 690 41 00 46 06 00 58 10 J1243+4043 07 44 34 23.9 53.3 -5.0 -83.8 24 41 00 58 05 01 09 40 --- 07 56 06 26.1 53.5 -4.8 -85.6 690 52 00 58 06 01 10 40 J1242+3751 07 57 06 26.3 56.7 -4.8 -84.5 50 52 01 10 35 01 12 40 =1240+381 07 59 07 26.7 56.8 -4.7 -84.8 120 54 01 10 36 01 13 40 J1243+4043 08 00 07 26.9 53.6 -4.7 -86.3 50 54 01 13 35 01 25 10 --- 08 11 39 29.1 53.7 -4.5 -88.1 690 65 01 13 36 01 25 40 J1243+4043 08 12 09 29.1 53.7 -4.5 -88.2 24 65 01 25 35 01 37 10 --- 08 23 41 31.3 53.7 -4.3 -90.0 690 76 01 25 36 01 38 10 J1242+3751 08 24 41 31.7 57.1 -4.3 -88.6 50 76 01 38 05 01 40 10 =1240+381 08 26 41 32.1 57.1 -4.3 -88.9 120 78 01 38 06 01 46 10 J1243+4043 08 32 42 33.0 53.7 -4.2 -91.5 350 78 01 46 05 01 55 10 --- 08 41 44 34.8 53.6 -4.0 -93.0 540 87 01 46 06 01 55 40 J1243+4043 08 42 14 34.9 53.6 -4.0 -93.1 24 87 01 55 35 02 04 50 --- 08 51 25 36.6 53.5 -3.9 -94.7 550 96 01 55 36 Schedule for VLBA_MK (Code Mk ) 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 ---------------------------------------------------------------------------------------- --- Thu 9 Jun 2011 Day 160 --- 02 05 50 J1242+3751 08 52 25 37.2 57.0 -3.9 -92.9 50 96 02 05 45 02 07 50 =1240+381 08 54 26 37.6 57.0 -3.8 -93.2 120 98 02 05 46 02 08 50 J1243+4043 08 55 26 37.3 53.4 -3.8 -95.4 50 98 02 08 45 02 17 20 --- 09 03 57 39.0 53.2 -3.7 -96.9 510 106 02 08 46 02 17 50 J1243+4043 09 04 27 39.0 53.1 -3.7 -97.0 24 106 02 17 45 02 26 20 --- 09 12 59 40.6 52.9 -3.5 -98.6 510 115 02 17 46 02 27 20 J1242+3751 09 13 59 41.4 56.6 -3.5 -96.5 49 115 02 27 15 02 29 20 =1240+381 09 15 59 41.8 56.5 -3.5 -96.8 120 117 02 27 16 02 30 20 J1243+4043 09 16 59 41.4 52.7 -3.5 -99.3 49 117 02 30 15 02 38 50 --- 09 25 31 43.0 52.3 -3.3 -101.0 510 125 02 30 16 02 39 20 J1243+4043 09 26 01 43.1 52.3 -3.3 -101.1 24 125 02 39 15 02 47 50 --- 09 34 32 44.7 51.8 -3.2 -102.8 510 133 02 39 16 02 48 50 J1242+3751 09 35 32 45.6 55.7 -3.1 -100.4 49 133 02 48 45 02 50 50 =1240+381 09 37 33 46.0 55.6 -3.1 -100.7 120 135 02 48 46 03 02 30 J1243+4043 09 49 15 47.4 50.8 -2.9 -105.9 689 135 03 02 25 03 14 00 --- 10 00 47 49.5 49.9 -2.7 -108.5 690 146 03 02 26 03 14 30 J1243+4043 10 01 17 49.5 49.8 -2.7 -108.6 24 146 03 14 25 03 26 00 --- 10 12 49 51.6 48.6 -2.5 -111.4 690 158 03 14 26 03 26 50 J1242+3751 10 13 39 52.9 52.9 -2.5 -108.4 39 158 03 26 45 03 28 50 =1240+381 10 15 39 53.3 52.6 -2.5 -108.8 120 160 03 26 46 03 29 50 J1243+4043 10 16 39 52.3 48.2 -2.5 -112.4 49 160 03 29 45 03 41 20 --- 10 28 11 54.3 46.7 -2.3 -115.5 690 171 03 29 46 03 41 50 J1243+4043 10 28 41 54.4 46.6 -2.3 -115.6 24 171 03 41 45 03 53 20 --- 10 40 13 56.3 44.9 -2.1 -118.9 690 182 03 41 46 03 54 10 J1242+3751 10 41 03 58.0 49.3 -2.0 -115.5 39 182 03 54 05 03 56 10 =1240+381 10 43 04 58.3 49.0 -2.0 -116.1 120 184 03 54 06 03 57 10 J1243+4043 10 44 04 56.9 44.2 -2.0 -120.1 49 184 03 57 05 04 08 40 --- 10 55 36 58.8 42.0 -1.8 -123.8 690 195 03 57 06 04 09 10 J1243+4043 10 56 06 58.9 41.9 -1.8 -124.0 24 195 04 09 05 04 20 40 --- 11 07 38 60.6 39.4 -1.6 -128.1 690 207 04 09 06 Schedule for VLBA_MK (Code Mk ) 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 --- 04 21 30 J1242+3751 11 08 28 62.6 43.8 -1.6 -124.5 38 207 04 21 25 04 23 30 =1240+381 11 10 28 63.0 43.3 -1.5 -125.2 120 209 04 21 26 04 24 30 J1243+4043 11 11 28 61.2 38.5 -1.6 -129.5 48 209 04 24 25 04 36 00 --- 11 23 00 62.8 35.3 -1.4 -134.1 690 220 04 24 26 04 36 30 J1243+4043 11 23 30 62.9 35.2 -1.3 -134.4 24 220 04 36 25 04 48 00 --- 11 35 02 64.4 31.6 -1.2 -139.5 690 231 04 36 26 04 48 50 J1242+3751 11 35 52 66.8 35.6 -1.1 -136.1 37 231 04 48 45 04 50 50 =1240+381 11 37 52 67.1 34.9 -1.1 -137.1 120 233 04 48 46 04 55 10 3C345 11 42 13 23.6 54.2 -5.0 -83.3 159 233 04 55 05 05 00 00 --- 11 47 04 24.5 54.3 -4.9 -84.0 290 238 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: 15 Station: VLBA_MK 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: 16 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