GTAC Observation Log 1. Date : 16/9/2013 2. Observation Sr. No. : 6705 3. Observer : Nissim Kanekar,Jayaram Narayanan Chengalur 4. Observer's Email : nkanekar@ncra.tifr.res.in,chengalur@ncra.tifr.res.in 5. Project Name : The spin temperature of high-redshift damped Lyman-alpha systems 6. Project Code : 24_055 7. Operator(s) : Nilesh,Rupsingh,Sachin,Shilpa,Surender 8. Command File : /odisk/gtac/cmd/nissim/1254-4059.cmd 9. LTA File : /gsbifrdata/16sep/24_055_16sep2013.lta,/gsbifrdata1/16sep/24_055_16sep2013.lta, 10. LogFlag File : /odisk/online1/logflags/24_055.FLAGS.9, ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 298 MHz ,RF2 : 298 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 231 MHz, ILO2 : 231 MHz , IVLO1 : 67 MHz, IVLO2 : 67 MHz 13. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 4+12 dB, 6 MHz,ON, IF-CH2 : 4+12 dB, 6 MHz,ON GSB SETTINGS : 14. GSB Mode : Realtime 15. GSB LTA : 8 16. GSB CTRL : ONLINE 17. GSB Fstop : ON 18. GAIN EQ : ON 19. Stokes : TotIntensity 20. Beam - 1 : OFF 21. Beam - 2 : OFF 22. ACQ BW : 16.67 MHz 23. Final BW : 2.08 MHz; Step # 0 24. Maximum Channels : 512 25. Channel Numbers : 0:511:1 26. LO5 -1 : 133.00 27. LO5 -2 : 172.00 28. Frequency Parameters (TPA) : 298 298 231 231 67 67. 29. Integration Time : 16.106112 Sec. 30. No of Antennas Working(Fringing) at the begining :26 31. Name of Non-Working Antennas (with reason for each) : C13 : Feed Jam. S03 : BLDC Work. W01 : Taken for Cherry picker W03 : 175 pole no fringe. 32. Note for Backup : 33. Start and End Time of Obs.(IST): 10:05 - 17:00 34. ONLINE Machine : Shivneri 35. No of Antennas Working(Fringing) at the end :26 36. Comments (During Observations) : 10:05 : Started set-up. 10:16 : Started scan on 3C286. 10:30 : All antennas power failure. 10:30 : Stopped scan. 11:06 : Started scan on 3C286 for 12min. 11:06 : W03 : 175 pol started working. 11:30 : Started command file. 16:00 : E04 taken for maintenance. 16:15 : W05 taken for maintenance. 16:40 : Stopped command file. E04 and W05 released. 16:45 : Started scan on 3C286. 17:00 : Stopped scan and observing session over.