GTAC Observation Log 1. Date : 23/11/2014 2. Observation Sr. No. : 7443 3. Observer : Rajeshwari Dutta, Raghunathan Srianand, Neeraj Gupta, Patrick Petitjean, Pasquier Noterdaeme, hadi Rahmani 4. Observer's Email : rdutta@iucaa.ernet.in, anand@iucaa.ernet.in, nrjgupta@gmail.com, ppetitje@iap.fr, noterdaeme@iap.fr, hadi@iucaa.ernet.in 5. Project Name : CHITALS: Cold HI 21-cm Absorption Line Survey 6. Project Code : 27_015 7. Operator(s) : Pramod, Rupsing, Surender 8. Command File : /odisk/gtac/cmd/rdutta/qgpj1551p07.cmd,/odisk/gtac/cmd/rdutta/qgpj1634p39.cmd 9. LTA File : /gsbifrdata/23nov/27_015_23nov2014.lta.1,/gsbifrdata/23nov/27_015_23nov2014.lta 10. LogFlag File : /odisk/online1/logflags/27_015.FLAGS.13,/odisk/online1/logflags/27_015.FLAGS.12 ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 1062.4475 MHz ,RF2 : 1062.4475 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 1000 MHz, ILO2 : 1000MHz , IVLO1 : 62.4475 MHz, IVLO2 : 62.4475 MHz 13. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 4+14 dB, 16 MHz,ON, IF-CH2 : 4+14 dB, 16 MHz,ON GSB SETTINGS : 14. GSB Host : gsbm1 15. GSB Mode : Realtime 16. GSB LTA : 8 17. GSB CTRL : ONLINE 18. GSB Fstop : ON 19. GAIN EQ : ON 20. Stokes : Total_Intensity 21. Beam - 1 : OFF 22. Beam - 2 : OFF 23. ACQ BW : 16.666666 MHz 24. Final BW : 4 MHz; Step # 1 25. Maximum Channels : 512 26. Channel Numbers : 0:511:1 27. LO5 -1 : 137.5525 28. LO5 -2 : 167.4475 29. Frequency Parameters (TPA) : 1062.4475 1062.4475 1000 1000 62.4475 62.4475 30. Integration Time : 16.1061 Sec 31. No of Antennas Working(Fringing) at the beginning :26 32. Name of Non-Working Antennas (with reason for each) : E04 and C01 : MCM-5 time out. W04 : Low cross amplitude counts but phases are stable. W06 : Low cross amplitude counts but phases are stable. 33. Note for Backup : 34. Start and End Time of Obs.(IST): 23 Nov 2014 07:00:00 - 23 Nov 2014 19:00:00 35. ONLINE Machine : Lenyadri 36. No of Antennas Working(Fringing) at the end :27 37. Comments (During Observations) : 06:50 : Started set-up. 07:05 : Started scan on 3C286. 07:30 : Started command file. /odisk/gtac/cmd/rdutta/qgpj1551p07.cmd 11:28 : E04 and C01 Released for observation. 14:42 : Stopped command file. 14:46 : Started scan on 3C286. 14:56 : Stopped scan. --------------------------------------------------------------------------- GSB line observation setup RF band= 1060 (1000 - 1120) LO1= 970 (lower) IFBW= 6 GSB [ACQ] BW= 16.6666 Total Channel= 512 Line/Center Frequency= 1039.6763 CH#[0]= 1037.593 CH#[512]= 1041.7596 BW= +4.1666 CW= 8.14 (KHz.) Digital SubBand/step#= 2 is USEABLE ### GSB_CONFIG LO5= 140.7402 164.2598 LTA_FILE L05= 132.407 172.593 BASE_BAND LO4= 59.2598 59.2598 tpa 1029.2598 1029.2598 970 970 59.2598 59.2598 ------------------------------------------------------------- 14:55 : Started set up. 15:02 : Started scan on 3C286 for 10 min. 15:10 : W01 No fringe. 15:13 : Stopped scan. 15:17 : Started command file '/odisk/gtac/cmd/rdutta/qgpj1634p39.cmd' 18:40 : Stopped command file. 18:45 : Started scan on 3C48. 19:00 : Stopped scan and observation session over.