GTAC Observation Log 1. Date : 25/12/2013 2. Observation Sr. No. : 6856 3. Observer : Poonam Chandra,Sayan Chakraborti,Alicia Margarita Soderberg,Alak Ray,Edo Berger,Naveen Yadav 4. Observer's Email : poonam@ncra.tifr.res.in,schakraborti@fas.harvard.edu,asoderberg@cfa.harvard.edu,akr@tifr.res.in,eberger@cfa.harvard.edu,nyadav@tifr.res.in 5. Project Name : GMRT OBSERVATIONS OF CLOSEBY VERY BRIGHT GRB 130427A 6. Project Code : 25_076 7. Operator(s) : Rupsingh, 8. Command File : /odisk/gtac/cmd/poonam/25dec13/25dec13.cmd 9. LTA File : /gsbifrdata1/25dec//25_076_25dec2013.lta, 10. LogFlag File : /odisk/online1/logflags/25_076.FLAGS.3, ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 591 MHz ,RF2 : 591 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 540 MHz, ILO2 : 540 MHz , IVLO1 : 51 MHz, IVLO2 : 51 MHz 13. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 4+12 dB, 32 MHz,ON, IF-CH2 : 4+12 dB, 32 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 : 33.33 MHz 23. Final BW : 33.333333 MHz; Step # 0 24. Maximum Channels : 256 25. Channel Numbers : 0:255:1 26. LO5 -1 : 149.00 27. LO5 -2 : 156.00 28. Frequency Parameters (TPA) : 591 591 540 540 51 51. 29. Integration Time : 16.106112 Sec. 30. No of Antennas Working(Fringing) at the begining :28 31. Name of Non-Working Antennas (with reason for each) : S02 : Servo problem. W03 : MCM time out. 32. Note for Backup : 33. Start and End Time of Obs.(IST): 00:25 - 04:00 34. ONLINE Machine : Shivneri 35. No of Antennas Working(Fringing) at the end :28 36. Comments (During Observations) : 00:30 : Started scan on 3C48. 00:45 : Stopped scan. 00:54 : Started command file 03:42 : Stopped command file. 03:45 : Started scan on 3C286. 04:00 : Stopped scan & observation session over.