GTAC Observation Log 1. Date : 16/12/2012 2. Observation Sr. No. : 6277 3. Observer : Somak Raychaudhury 4. Observer's Email : somak@star.sr.bham.ac.uk 5. Project Name : Abell 520: Radio Halo, S-Z map, NAT Sources in an Extreme Merging Galaxy Cluster 6. Project Code : 23_015 7. Operator(s) : Navanath, Pramod, Shilpa, Surender 8. Command File : /odisk/gtac/cmd/somak/23_015/23_015.cmd 9. LTA File : /gsbifrdata/16dec/23_015_16dec2012.lta, /gsbifrdata/16dec/23_015_16dec2012.lta.1 10. LogFlag File : /odisk/online1/logflags/23_015.FLAGS.2, ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 242 MHz ,RF2 : 242 MHz, SA1 : 14 dB, SA2 : 14 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 304 MHz, ILO2 : 304 MHz , IVLO1 : 62 MHz, IVLO2 : 62 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 : 256 22. IFBW (MHz) : LO5 (KHz) : 16:138000-167000 23. Final Bandwidth (MHz): OFF MHz; Step # 0 24. Frequency Parameters (TPA) : 242 242 304 304 62 62. 25. Integration Time : 8.053 Sec. 26. No of Antennas Working(Fringing) :27 27. Name of Non-Working Antennas (with reason for each) : W05 : Mechanical maintenance. S01 : BLDC. C02 : No fringe @ 235 Mhz. 28. Note for Backup :-- 29. Start and End Time of Obs.(IST): 21:00 - 05:01 30. ONLINE Machine : Lenyadri 31. Comments (During Observations) : 21:00 : Started set up for 235MHz. 21:13 : Started scan on 3C48. 21:35 : Started command file 21:40 : Commmd file stopped due to Online socket open problem 22:04 : Restarted online and restarted command file. 04:43 : Stopped command file. 04:45 : Started scan on 3C147. 05:01 : Stopped scan & observing session is over.