GTAC Observation Log 1. Date : 21/12/2012 2. Observation Sr. No. : 6283 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, Nilesh, Sachin, Shilpa, 8. Command File : /odisk/gtac/cmd/poonam/23_003/upper.cmd, 9. LTA File : /gsbifrdata/21dec/23_003_21dec2012.lta, 10. LogFlag File : /odisk/online1/logflags/23_003.FLAGS, 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, 16 MHz,ON, IF-CH2 : 4+12 dB, 16 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) :27 27. Name of Non-Working Antennas (with reason for each) : C09 : ABC time out. W05 : Mechanical maintenance. S01 : BLDC work. 28. Note for Backup :-- 29. Start and End Time of Obs.(IST): 02:00 - 10:07 30. ONLINE Machine : Lenyadri 31. Comments (During Observations) : 02:00 : Started settings for observation. 02:25 : Started scan on 3C138 for 10min. 02:45 : Started scan on 1227+365 for ~ 8min. 02:57 : Started command file. '/odisk/gtac/cmd/poonam/23_003/upper.cmd'. 08:45 : Stopped command file. 08:46 : Started scan on 3C286. 09:03 : Stopped scan. 09:03 : C06, C08, E02 taken for painting. 09:04 : Restarted command file. 10:07 : Stopped command file and observing session over.