GTAC Observation Log 1. Date : 27/04/2015 2. Observation Sr. No. : 7741 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 5. Project Name : CHITALS: Cold HI 21-cm Absorption Line Survey. 6. Project Code : 28_008 7. Operator(s) : Pramod, Rupsing 8. Command File : /odisk/gtac/cmd/28_008/obs_s1.cmd 9. LTA File : /gsbifrdata/26apr/28_008_26apr2015.lta 10. LogFlag File : /odisk/online1/logflags/28_008.FLAGS.3 ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 1311.9901 MHz ,RF2 : 1311.9901 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 1250 MHz, ILO2 : 1250MHz , IVLO1 : 61.9901 MHz, IVLO2 : 61.9901 MHz 13. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 4+14 dB, 32 MHz,ON, IF-CH2 : 4+14 dB, 32 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 : 138.0099 28. LO5 -2 : 166.9901 29. Frequency Parameters (TPA) : 1311.9901 1311.9901 1250 1250 61.9901 61.9901 30. Integration Time : 16.1061 Sec 31. No of Antennas Working(Fringing) at the beginning :28 32. Name of Non-Working Antennas (with reason for each) : S01 : Feed Jam W05 : Taken for maintenance 33. Note for Backup : 34. Start and End Time of Obs.(IST): 26 Apr 2015 16:00:00 - 27 Apr 2015 00:00:00 35. ONLINE Machine : Shivneri 36. No of Antennas Working(Fringing) at the end :29 37. Comments (During Observations) : 15:40 : Started set up. 15:58 : Started scan on 3C147. 16:09 : Stopped scan and started command file. '/odisk/gtac/cmd/28_008/obs_s1.cmd' 17:00 : W05 released for observation. 20:04 : Stopped command file. 20:11 : Started scan on 3C286. 20:21 : Stopped scan and restarted command file. 23:36 : Stooped command file. 23:42 : Started scan on 3C286. 00:00 : Stopped scan and observation session over.