COVER INFORMATION Station: URUMQI (Code Ur ) Experiment: OH gas in Megamaser Galaxies: imaging the diffuse and compact emission Exp. Code: EL074 Schedule Version: 1.00 Processed by SCHED version: 11.60 Release 11.6; April 2020 PI: Dalei Li Address: Xinjiang Astronomical Observatory, Chinese Academy of Sciences 150, Science 1-Street Urumqi, Xinjiang China PR Phone: +8615199077491 EMAIL: lidalei@xao.ac.cn Fax: Phone during observation: +8615199077491 Observing mode: vlbi Notes: # Please, make sure PHASE CAL is OFF # Wb: total span=169MHz, LO set to begin 160MHz IF at 1554 and drop upper 9.72MHz Ef/Hh will miss most/all (repsectively) of the lowest sub-band Schedule for URUMQI (Code Ur ) Page 2 OH gas in Megamaser Galaxies: imaging the diffuse and compact emission 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 ---------------------------------------------------------------------------------------- --- Sat 1 Mar 2025 Day 60 --- Next scan frequencies: 1554.72 1554.72 1607.22 1607.22 1659.72 1659.72 1691.72 1691.72 Next BBC frequencies: 1368.72 1368.72 1421.22 1421.22 1473.72 1473.72 1505.72 1505.72 Next scan bandwidths: 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 01 30 00 3C345 17 55 10 76.2 260.5 1.2 68.6 0 0 01 30 00 01 35 00 --- 18 00 11 75.3 261.9 1.3 69.2 300 38 01 30 01 01 38 00 J1642-0621 18 03 12 37.0 205.1 1.3 18.1 101 38 01 38 00 01 40 00 --- 18 05 12 36.8 205.7 1.4 18.5 120 54 01 38 01 01 40 00 IRAS16399 18 05 12 33.6 204.2 1.4 17.6 -9 54 No stop 01 43 30 --- 18 08 42 33.4 205.2 1.4 18.3 201 81 01 40 01 01 44 00 J1642-0621 18 09 13 36.5 206.9 1.4 19.3 21 81 01 44 00 01 45 30 --- 18 10 43 36.3 207.3 1.5 19.6 90 92 01 44 01 01 45 30 IRAS16399 18 10 43 33.2 205.8 1.4 18.7 -9 92 No stop 01 49 00 --- 18 14 13 32.9 206.8 1.5 19.4 201 119 01 45 31 01 49 30 J1642-0621 18 14 43 36.0 208.5 1.5 20.4 21 119 01 49 30 01 53 30 --- 18 18 44 35.7 209.6 1.6 21.2 240 150 01 49 31 01 53 30 IRAS16399 18 18 44 32.6 208.0 1.6 20.2 -9 150 No stop 01 57 00 --- 18 22 15 32.3 209.0 1.6 20.9 201 177 01 53 31 01 57 30 J1642-0621 18 22 45 35.3 210.8 1.7 21.9 21 177 01 57 30 01 59 00 --- 18 24 15 35.1 211.2 1.7 22.2 90 188 01 57 31 01 59 00 IRAS16399 18 24 15 32.1 209.5 1.7 21.3 -9 188 No stop 02 02 30 --- 18 27 46 31.8 210.5 1.7 21.9 201 215 01 59 01 02 03 00 J1642-0621 18 28 16 34.8 212.3 1.7 23.0 21 215 02 03 00 02 07 00 --- 18 32 16 34.4 213.4 1.8 23.7 240 246 02 03 01 02 10 00 3C345 18 35 17 68.9 269.4 1.9 70.7 107 246 02 10 00 02 14 00 --- 18 39 17 68.2 270.1 1.9 70.7 240 277 02 10 01 02 17 00 3C286 18 42 18 28.9 285.8 5.2 54.0 99 277 02 17 00 02 22 00 --- 18 47 19 28.0 286.5 5.2 53.7 300 315 02 17 01 02 28 00 J1642-0621 18 53 20 32.1 219.1 2.2 27.4 287 315 02 28 00 02 30 00 --- 18 55 20 31.9 219.6 2.2 27.7 120 331 02 28 01 02 30 00 IRAS16399 18 55 20 29.0 217.6 2.2 26.7 -9 331 No stop 02 33 30 --- 18 58 51 28.6 218.5 2.2 27.3 201 358 02 30 01 Schedule for URUMQI (Code Ur ) Page 3 OH gas in Megamaser Galaxies: imaging the diffuse and compact emission 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 ---------------------------------------------------------------------------------------- --- Sat 1 Mar 2025 Day 60 --- 02 34 00 J1642-0621 18 59 21 31.4 220.6 2.3 28.4 21 358 02 34 00 02 35 30 --- 19 00 51 31.2 221.0 2.3 28.6 90 369 02 34 01 02 35 30 IRAS16399 19 00 51 28.3 219.0 2.3 27.6 -9 369 No stop 02 39 00 --- 19 04 22 27.9 219.9 2.3 28.2 201 396 02 35 31 02 39 30 J1642-0621 19 04 52 30.8 222.0 2.4 29.3 21 396 02 39 30 02 41 00 --- 19 06 22 30.6 222.4 2.4 29.5 90 408 02 39 31 02 41 00 IRAS16399 19 06 22 27.7 220.4 2.4 28.5 -9 408 No stop 02 44 30 --- 19 09 52 27.3 221.2 2.4 29.0 201 435 02 41 01 02 45 00 J1642-0621 19 10 23 30.1 223.4 2.4 30.1 21 435 02 45 00 02 46 30 --- 19 11 53 29.9 223.8 2.5 30.3 90 446 02 45 01 02 46 30 IRAS16399 19 11 53 27.0 221.7 2.5 29.3 -9 446 No stop 02 50 00 --- 19 15 23 26.6 222.5 2.5 29.9 201 473 02 46 31 02 50 30 J1642-0621 19 15 53 29.4 224.8 2.5 30.9 21 473 02 50 30 02 52 00 --- 19 17 24 29.2 225.1 2.6 31.2 90 485 02 50 31 02 52 00 IRAS16399 19 17 24 26.4 223.0 2.6 30.2 -9 485 No stop 02 55 30 --- 19 20 54 25.9 223.9 2.6 30.7 201 512 02 52 01 02 56 00 J1642-0621 19 21 24 28.7 226.1 2.6 31.7 21 512 02 56 00 02 57 30 --- 19 22 55 28.5 226.5 2.7 32.0 90 523 02 56 01 02 57 30 IRAS16399 19 22 55 25.7 224.3 2.6 31.0 -9 523 No stop 03 01 00 --- 19 26 25 25.2 225.1 2.7 31.5 201 550 02 57 31 03 01 30 J1642-0621 19 26 55 27.9 227.4 2.7 32.5 21 550 03 01 30 03 03 00 --- 19 28 25 27.7 227.8 2.8 32.7 90 562 03 01 31 03 03 00 IRAS16399 19 28 25 25.0 225.6 2.7 31.8 -9 562 No stop 03 06 30 --- 19 31 56 24.5 226.4 2.8 32.2 201 588 03 03 01 03 07 00 J1642-0621 19 32 26 27.2 228.7 2.8 33.3 22 588 03 07 00 03 08 30 --- 19 33 56 27.0 229.1 2.8 33.5 90 600 03 07 01 03 08 30 IRAS16399 19 33 56 24.3 226.9 2.8 32.5 -8 600 No stop 03 12 00 --- 19 37 27 23.8 227.7 2.9 33.0 202 627 03 08 31 03 12 30 J1642-0621 19 37 57 26.4 230.0 2.9 34.0 22 627 03 12 30 03 14 00 --- 19 39 27 26.2 230.3 2.9 34.2 90 638 03 12 31 Schedule for URUMQI (Code Ur ) Page 4 OH gas in Megamaser Galaxies: imaging the diffuse and compact emission 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 ---------------------------------------------------------------------------------------- --- Sat 1 Mar 2025 Day 60 --- 03 14 00 IRAS16399 19 39 27 23.5 228.1 2.9 33.3 -8 638 No stop 03 17 30 --- 19 42 58 23.0 228.9 3.0 33.7 202 665 03 14 01 03 18 00 J1642-0621 19 43 28 25.7 231.2 3.0 34.7 22 665 03 18 00 03 19 30 --- 19 44 58 25.4 231.6 3.0 34.9 90 677 03 18 01 03 19 30 IRAS16399 19 44 58 22.8 229.4 3.0 34.0 -8 677 No stop 03 23 00 --- 19 48 29 22.3 230.1 3.1 34.4 202 704 03 19 31 03 23 30 J1642-0621 19 48 59 24.9 232.5 3.1 35.4 22 704 03 23 30 03 25 00 --- 19 50 29 24.7 232.8 3.1 35.6 90 715 03 23 31 03 28 00 3C345 19 53 30 54.8 280.6 3.2 68.1 116 715 03 28 00 03 32 00 --- 19 57 30 54.1 281.1 3.2 67.9 240 746 03 28 01 03 36 00 3C286 20 01 31 15.6 297.3 6.5 48.4 161 746 03 36 00 03 41 00 --- 20 06 32 14.8 298.1 6.6 47.9 300 785 03 36 01 03 46 00 J1642-0621 20 11 33 21.5 237.4 3.5 38.0 234 785 03 46 00 03 48 00 --- 20 13 33 21.2 237.8 3.5 38.2 120 800 03 46 01 03 48 00 IRAS16399 20 13 33 18.7 235.5 3.5 37.3 -8 800 No stop 03 51 30 --- 20 17 03 18.1 236.2 3.6 37.7 202 827 03 48 01 03 52 00 J1642-0621 20 17 34 20.6 238.6 3.6 38.6 22 827 03 52 00 03 53 30 --- 20 19 04 20.4 238.9 3.6 38.7 90 838 03 52 01 03 53 30 IRAS16399 20 19 04 17.8 236.6 3.6 37.9 -8 838 No stop 03 57 00 --- 20 22 34 17.3 237.3 3.6 38.3 202 865 03 53 31 03 57 30 J1642-0621 20 23 04 19.7 239.8 3.7 39.1 22 865 03 57 30 03 59 00 --- 20 24 35 19.5 240.1 3.7 39.3 90 877 03 57 31 03 59 00 IRAS16399 20 24 35 17.0 237.7 3.7 38.5 -8 877 No stop 04 02 30 --- 20 28 05 16.4 238.4 3.7 38.9 202 904 03 59 01 04 03 00 J1642-0621 20 28 35 18.9 240.9 3.8 39.6 22 904 04 03 00 04 04 30 --- 20 30 06 18.6 241.2 3.8 39.8 90 915 04 03 01 04 04 30 IRAS16399 20 30 06 16.1 238.8 3.8 39.1 -8 915 No stop 04 08 00 --- 20 33 36 15.6 239.5 3.8 39.4 202 942 04 04 31 04 08 30 J1642-0621 20 34 06 18.0 242.0 3.8 40.2 22 942 04 08 30 04 10 00 --- 20 35 36 17.7 242.3 3.9 40.3 90 954 04 08 31 Schedule for URUMQI (Code Ur ) Page 5 OH gas in Megamaser Galaxies: imaging the diffuse and compact emission 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 ---------------------------------------------------------------------------------------- --- Sat 1 Mar 2025 Day 60 --- 04 10 00 IRAS16399 20 35 36 15.3 239.9 3.9 39.6 -8 954 No stop 04 13 30 --- 20 39 07 14.7 240.6 3.9 39.9 202 981 04 10 01 04 14 00 J1642-0621 20 39 37 17.1 243.1 3.9 40.6 22 981 04 14 00 04 15 30 --- 20 41 07 16.9 243.4 4.0 40.8 90 992 04 14 01 04 15 30 IRAS16399 20 41 07 14.4 241.0 4.0 40.1 -8 992 No stop 04 19 00 --- 20 44 38 13.8 241.7 4.0 40.4 202 1019 04 15 31 04 19 30 J1642-0621 20 45 08 16.2 244.2 4.0 41.1 22 1019 04 19 30 04 21 00 --- 20 46 38 16.0 244.5 4.1 41.2 90 1031 04 19 31 04 21 00 IRAS16399 20 46 38 13.5 242.1 4.0 40.6 -8 1031 No stop 04 24 30 --- 20 50 09 13.0 242.7 4.1 40.9 202 1058 04 21 01 04 25 00 J1642-0621 20 50 39 15.3 245.2 4.1 41.5 22 1058 04 25 00 04 26 30 --- 20 52 09 15.1 245.5 4.1 41.7 90 1069 04 25 01 04 26 30 IRAS16399 20 52 09 12.6 243.1 4.1 41.1 -8 1069 No stop 04 30 00 --- 20 55 40 12.1 243.8 4.2 41.3 202 1096 04 26 31 04 30 30 J1642-0621 20 56 10 14.4 246.3 4.2 42.0 22 1096 04 30 30 04 32 00 --- 20 57 40 14.1 246.6 4.2 42.1 90 1108 04 30 31 04 32 00 IRAS16399 20 57 40 11.7 244.2 4.2 41.5 -8 1108 No stop 04 35 30 --- 21 01 11 11.2 244.8 4.3 41.8 202 1135 04 32 01 04 36 00 J1642-0621 21 01 41 13.5 247.3 4.3 42.4 22 1135 04 36 00 04 37 30 --- 21 03 11 13.2 247.6 4.3 42.5 90 1146 04 36 01 04 37 30 IRAS16399 21 03 11 10.8 245.2 4.3 41.9 -8 1146 No stop 04 41 00 --- 21 06 42 10.3 245.9 4.4 42.2 202 1173 04 37 31 04 41 30 J1642-0621 21 07 12 12.5 248.4 4.4 42.8 22 1173 04 41 30 04 43 00 --- 21 08 42 12.3 248.7 4.4 42.9 90 1185 04 41 31 04 43 00 IRAS16399 21 08 42 9.9 246.2 4.4 42.4 -8 1185 No stop 04 46 30 --- 21 12 12 9.3 246.9 4.5 42.6 202 1212 04 43 01 04 47 00 J1642-0621 21 12 43 11.6 249.4 4.5 43.1 22 1212 04 47 00 04 48 30 --- 21 14 13 11.3 249.7 4.5 43.2 90 1223 04 47 01 04 52 30 J1642-0621 21 18 13 10.7 250.4 4.6 43.5 238 1223 04 52 30 04 54 00 --- 21 19 44 10.4 250.7 4.6 43.6 90 1235 04 52 31 Schedule for URUMQI (Code Ur ) Page 6 OH gas in Megamaser Galaxies: imaging the diffuse and compact emission 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 ---------------------------------------------------------------------------------------- --- Sat 1 Mar 2025 Day 60 --- 04 58 00 J1642-0621 21 23 44 9.7 251.4 4.7 43.8 238 1235 04 58 00 04 59 30 --- 21 25 15 9.5 251.7 4.7 43.9 90 1246 04 58 01 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess125.L1024usb --- WARNING --- This group does not match an entry in the frequency catalog. This might be ok because the catalog is not complete. But be very careful to be sure that the setup is correct. Setup group: 8 Station: URUMQI Total bit rate: 1024 Format: MARK5B Bits per sample: 2 Sample rate: 64.000 Number of channels: 8 DBE type: DBBC_DDC Speedup factor: 1.00 Disk used to record data. 1st LO= 186.00 186.00 186.00 186.00 186.00 186.00 186.00 186.00 Net SB= U U U U U U U U IF SB = U U U U U U U U Pol. = RCP LCP RCP LCP RCP LCP RCP LCP BBC = 1 9 2 10 3 11 4 12 BBC SB= U U U U U U U U IF = A2 C1 A2 C1 A2 C1 A2 C1 The following frequency sets based on these setups were used. Frequency Set: 5 Setup file default. Used with PCAL = off LO sum= 1554.72 1554.72 1607.22 1607.22 1659.72 1659.72 1691.72 1691.72 BBC fr= 1368.72 1368.72 1421.22 1421.22 1473.72 1473.72 1505.72 1505.72 Bandwd= 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 Matching frequency sets: 5 Track assignments are: track1= 2, 10, 4, 12, 6, 14, 8, 16 barrel=roll_off POSITIONS OF SOURCES USED IN RECORDING SCANS Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) * IRAS16399 16 39 55.599269 * 16 42 40.107370 16 44 02.930024 0.00 -09 37 35.64506 *-09 43 13.05900 -09 46 12.26913 0.00 From catalog imbedded in main SCHED input file. * J1642-0621 16 39 21.443854 * 16 42 02.177700 16 43 23.109132 0.00 -06 15 43.81936 *-06 21 23.69500 -06 24 25.42123 0.00 From catalog imbedded in main SCHED input file. * 3C345 16 41 17.606234 * 16 42 58.809971 16 43 49.891629 0.00 39 54 10.81496 * 39 48 36.99402 39 45 24.04354 0.00 From catalog imbedded in main SCHED input file. * 3C286 13 28 49.657760 * 13 31 08.288052 13 32 19.443286 0.00 30 45 58.64032 * 30 30 32.95896 30 22 30.71274 0.00 From catalog imbedded in main SCHED input file. SOURCE SCAN SUMMARY FOR SOURCES LISTED ABOVE Scan hours are for recording scans only. Baseline hours are only counted for scans above horizon at both ends. Source Setup file Frequency sets Observing hours (duplicates not shown) Scan Baseline IRAS16399 sess125.L1024usb 1 2 3 4 5 6 7 8 13 14 4.900 305.712 J1642-0621 sess125.L1024usb 1 2 3 4 5 6 7 8 13 14 2.283 148.159 3C345 sess125.L1024usb 1 2 3 4 5 6 7 8 13 14 0.300 24.516 3C286 sess125.L1024usb 1 2 3 5 6 7 8 13 14 0.250 13.906 EFFECT OF SOLAR CORONA 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) IRAS16399 90.1 J1642-0621 90.7 3C345 95.9 3C286 135.6 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