GTAC Observation Log 1. Date : 23/12/2012 2. Observation Sr. No. : 6285 3. Observer : Poonam Chandra 4. Observer's Email : poonam@ncra.tifr.res.in 5. Project Name : An unbiased census of giant radio halos in clusters of galaxies 6. Project Code : 23_003 7. Operator(s) : Deepak, Pramod, Shilpa, 8. Command File : /odisk/gtac/cmd/poonam/23_003/n4747botfirst.cmd, /odisk/gtac/cmd/poonam/23_003/n4747bot.cmd 9. LTA File : /gsbifrdata/23dec/23_003_23dec2012.lta 10. LogFlag File : /odisk/online1/logflags/23_003.FLAGS.3 ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 1408.55 MHz ,RF2 : 1408.55 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 1345 MHz, ILO2 : 1345 MHz , IVLO1 : 63.55 MHz, IVLO2 : 63.55 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. GAIN EQ : ON 17. Stokes : Total_Intensity 18. Beam - 1 : OFF 19. Beam - 2 : OFF 20. ACQ BW : 16 MHz 21. Maximum Channels : 512 22. IFBW (MHz) : LO5 (KHz) : Custom :- 16 : 136.45 - 168.55 23. Final Bandwidth (MHz): 4 MHz; Step # 1 24. Frequency Parameters (TPA) : 1408.55 1408.55 1345 1345 63.55 63.55. 25. Integration Time : 16.106 Sec. 26. No of Antennas Working(Fringing) :28 27. Name of Non-Working Antennas (with reason for each) : S01: Taken for BLDC. W05: Taken for MECH. Maintenance. 28. Note for Backup :-- 29. Start and End Time of Obs.(IST): 00:40 - 07:16 30. ONLINE Machine : Lenyadri 31. Comments (During Observations) : 00:40 : Started set up for 1390MHz. 00:55 : Started scan on 3C147. 01:11 : Stopped scan. 01:15 : Started scan on 3C138. 01:45 : Started command file. '/odisk/gtac/cmd/poonam/23_003/n4747botfirst.cmd' 02:51 : Stopped command file and started another command file. '/odisk/gtac/cmd/poonam/23_003/n4747bot.cmd' 06:55 : Stopped command file. 06:57 : Started scan on 3C286. 07:16 : Stopped scan and observing session over.