GTAC Observation Log 1. Date : 23/12/2014 2. Observation Sr. No. : 7514 3. Observer : Jayaram Narayanan Chengalur, Narendranath Patra, Igor Karachentsev 4. Observer's Email : chengalur@ncra.tifr.res.in, narendra@ncra.tifr.res.in, ikar@sao.ru 5. Project Name : HI in faint gas rich galaxies 6. Project Code : 27_037 7. Operator(s) : Nilesh, Sachin, Shilpa 8. Command File : /odisk/gtac/cmd/chengalu/ 9. LTA File : /gsbifrdata/23dec/27_037_23dec2014.lta 10. LogFlag File : /odisk/online1/logflags/27_037.FLAGS ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 1407 MHz ,RF2 : 1407 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 1345 MHz, ILO2 : 1345MHz , 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 : 4 MHz; Step # 2 25. Maximum Channels : 512 26. Channel Numbers : 0:511:1 27. LO5 -1 : 138 28. LO5 -2 : 167 29. Frequency Parameters (TPA) : 1407 1407 1345 1345 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) : C10 : PC104 E04 : BLDC W04 : Low fringe 33. Note for Backup : 34. Start and End Time of Obs.(IST): 23 Dec 2014 02:00:00 - 23 Dec 2014 09:00:00 35. ONLINE Machine : Shivneri 36. No of Antennas Working(Fringing) at the end :24 37. Comments (During Observations) : 01:07 : Started scan on 3C48 for 15 mins. 01:30 : Started command file. 03:39 : C14 started giving ABC problem.Tried initialising, but failed. 04:48 : C14 started tracking. 05:57 : C14 ABC reset.Done setup but failed. 06:32 : W06 got ABC reset. 07:18 : C14 and W06 started working. 08:41 : Stopped command file. 08:46 : Started scan on 3C286. 08:55 : S04 applied brakes. 09:03 : C14 got abc timeout. 09:04 : S01 got abc timeout. 09:06 : Stopped scan and observing session over.