GTAC Observation Log 1. Date : 09/02/2011 2. Observation Sr. No. : 5235 3. Observer : Nissim Kanekar, Jayaram Chegalur 4. Observer's Email : nkanekar@ncra.tifr.res.in,chengalu@ncra.tifr.res.in 5. Project Name : HI 21cm absorption from a high redshift damped Lyman-\alpha system. 6. Project Code : 19_077 7. Operator(s) : Navanath, Nilesh, Sachin, Santaji, Shilpa 8. Command File : /odisk/gtac/cmd/nissim/1239+376.cmd 9. LTA File : /rawdata/9feb/19_077_09feb2011.lta, /rawdata1/9feb/19_077_09feb2011.ltb 10. GSB File : /gsbifrdata/9feb/19_077_09feb2011_gsb.lta 11. LogFlag File : /odisk/online1/logflags/19_077.FLAGS.2 ANTENNA SETTINGS : 12. RF Freq(MHz) & Solar Attn(dB)- RF1 : 321.2 MHz ,RF2 : 321.2 MHz, SA1 : 0 dB, SA2 : 0 dB 13. Ist LO (MHz) & IVth LO (MHz) : ILO1 : 252 MHz, ILO2 : 252 MHz, IVLO1 : 69.2 MHz, IVLO2 : 69.2 MHz 14. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 4+12 dB, 6 MHz,ON, IF-CH2 : 4+12 dB, 6 MHz,ON 15. BB BW(KHz) & BB ALC : 2000 KHz, ON CORRELATOR SETTINGS : GHB Settings : 16. GHB Channels : 0:255:1 17. Correlator Mode : UsbHighRes 18. Frequency Parameters (TPA) : 321.2 321.2 252 252 69.2 69.2 GSB Settings : 19. Maximum Channels : 512 20. Final Bandwidth (MHz): 2 MHz; Step # 2 21. IFBW (MHz) : LO5 (KHz) : Custom :- 16 : 135000 - 170000 22. Stokes : Total_Intensity 23. Beam - 1 : IA 24. Beam - 2 : PA 25. Integration Time : 128 LTA ~ 16.908 Sec. 26. No of Antennas Working(Fringing) :28 27. Name of Non-Working Antennas (with reason for each) : C01 : 130pol no self power (GHB+GSB). C09 : No fringe. 28. Note for Backup :-- 29. Start and End Time of Obs.(IST): 22:05 - 08:10 30. ONLINE Machine : Lenyadri 31. Comments (During Observations) : 22:05 : Started setup. ------------------------------------------------- 1239+376 J2000 Co-ordinates: 12h42m09.81s +37d20'05.69" z=3.4082 Line frequency: 322.2 MHz FLux calibrator: 3C147, 3C286 Phase calibrator: 1156+314, 3C286 Source list : /temp2/data/source/nk.list Command file : 1239+376.cmd Project code : 19_077 Project title: 1239+376 GHB correlator mode : USB-High-Res (256 channels, USB) CLK_SEL : 3 RF band : 327 Edge frequency (GHB): 321.2 MHz LO (1) : 252 MHz LO (4) : 69.2 IF BW : 6 MHz BB BW : 2 MHz TPA 321.2 321.2 252 252 69.2 69.2 lta 8m GSB: 2 MHz BW. 512 channels LO5 = 135.0, 170.0 MHz The line is in the 3rd quadrant (8.3-12.5 MHz). Use step 2. Band starts at 321.1667 MHz. ------------------------------------------------- 22:18 : Started scan on 3C147. 22:34 : Stopped scan. 22:39 : Command file '/odisk/gtac/cmd/nissim/1239+376.cmd' started. 05:47 : C14 Servo time out. 06:20 : Tried telemetry reset to C14. 06:27 : C14 Started working. 07:50 : cmd file stopped. 07:52 : Started scan on 3c286 for 15min. 08:10 : Observing session over. -----------------------------------------------------