GTAC Observation Log 1. Date : 13/05/2017 2. Observation Sr. No. : 9383 3. Observer : Alka Mishra, Ramya Sethuram, SMITHA SUBRAMANIAN, Mousumi Das, Lei Hao 4. Observer's Email : alkam7@gmail.com, sramyaraman@gmail.com, smithaharisharma@gmail.com, chandaniket@gmail.com, haol@shao.ac.cn 5. Project Name : HI observations of Giant Low Surface Brightness galaxies: Revealing the true nature of extended disks 6. Project Code : 32_027 7. Operator(s) : Nilesh, Rupsing 8. Command File : /odisk/gtac/cmd/32_027/13may17/obs_01may.cmd 9. LTA File : /gsbifrdata1/13may/32_027_13may2017.lta 10. LogFlag File : /odisk/online1/logflags/32_027.FLAGS.1 ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 1352 MHz ,RF2 : 1352 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 1290 MHz, ILO2 : 1290MHz , 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_shivneri 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 : 16.6666666 MHz 24. Final BW : 4 MHz; Step # 1 25. Maximum Channels : 256 26. Channel Numbers : 0:255:1 27. LO5 -1 : 138 28. LO5 -2 : 167 29. Frequency Parameters (TPA) : 1352 1352 1290 1290 62 62 30. Integration Time : 16.1061 Sec 31. No of Antennas Working(Fringing) at the beginning :25 32. Name of Non-Working Antennas (with reason for each) : C01 : Low fringe. C02 : Servo problem. C14 : Not released for observation. S01 : ABC time out. S02 : CH-1 - No fringe. 33. Note for Backup : 34. Start and End Time of Obs.(IST): 13 May 2017 07:05:00 - 13 May 2017 14:00:00 35. ONLINE Machine : Lenyadri 36. No of Antennas Working(Fringing) at the end :24 37. Comments (During Observations) : 07:00 : Started settings. 07:10 : Started scan on 3C48 for ~ 18 min. 07:23 : E-arm power failure (E04 and E06 ABC time out). 07:29 : Started command file. /odisk/gtac/cmd/32_027/13may17/obs_01may.cmd 07:54 : E-arm power resumed. 08:10 : E-arm started working. 09:47 : W03 taken for mechanical work. 10:27 : W01 servo problem. 12:40 : W01 released for osbervation. 13:41 : Stopped command file. 13:45 : Started scan on 3C48. 14:00 : Stopped scan and observation closed.