GTAC Observation Log 1. Date : 31/12/2014 2. Observation Sr. No. : 7530 3. Observer : Shweta, Ramana Athreya 4. Observer's Email : ashweta@students.iiserpune.ac.in, rathreya@iiserpune.ac.in 5. Project Name : Mapping the spectral index of Galaxy Clusters with Radio Halos 6. Project Code : 27_070 7. Operator(s) : Deepak, Navnath 8. Command File : /odisk/gtac/cmd/27_070/obs.cmd, 9. LTA File : /gsbifrdata/30dec/27_070_30dec2014_16s.lta.1,/gsbifrdata/30dec/27_070_30dec2014_16s.lta,/gsbifrdata1/30dec/27_070_30dec2014_2s.lta.1,/gsbifrdata1/30dec/27_070_30dec2014_2s.lta 10. LogFlag File : /odisk/online1/logflags/27_070.FLAGS.3 ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 156 MHz ,RF2 : 156 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 218 MHz, ILO2 : 218MHz , IVLO1 : 62 MHz, IVLO2 : 62 MHz 13. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 4+14 dB, 16 MHz,ON, IF-CH2 : 4+14 dB, 16 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 : 16.666666 MHz; Step # 25. Maximum Channels : 256 26. Channel Numbers : 0:255:1 27. LO5 -1 : 138 28. LO5 -2 : 167 29. Frequency Parameters (TPA) : 156 156 218 218 62 62 30. Integration Time : 16.1061 Sec 31. No of Antennas Working(Fringing) at the beginning :27 32. Name of Non-Working Antennas (with reason for each) : E04 : BLDC Work W04 : Maintenance. C10 : No feed. 33. Note for Backup : 34. Start and End Time of Obs.(IST): 30 Dec 2014 18:00:00 - 31 Dec 2014 07:00:00 35. ONLINE Machine : Shivneri 36. No of Antennas Working(Fringing) at the end :22 37. Comments (During Observations) : 18:00 : Started setup. 18:02 : Started scan on 3C147 for 15min. 18:21 : Started cmd file. /odisk/gtac/cmd/27_070/obs.cmd 22:16 : Stated cmd file. /odisk/gtac/cmd/27_070/30dec14/obs.cmd 06:36 : Started scan on 0834+555 for ~6min. 06:40 : South Arm Electrical power failure. 06:42 : stopped scan. 06:46 : Started scan on 3c286 for ~ 14min. 07:00 : Closed observation.