GTAC Observation Log 1. Date : 20/10/2014 2. Observation Sr. No. : 7374 3. Observer : Jayaram Narayanan Chengalur, Simon Pustilnik 4. Observer's Email : chengalur@ncra.tifr.res.in, sap@sao.ru 5. Project Name : HI observations of extremely gas rich void galaxies 6. Project Code : 27_035 7. Operator(s) : Nilesh, Sachin, Shilpa, Surender 8. Command File : /odisk/gtac/cmd/chengalu/j0626\+24.cmd 9. LTA File : /gsbifrdata/20oct/27_035_20oct2014.lta 10. LogFlag File : /odisk/online1/logflags/27_035.FLAGS.1,/odisk/online1/logflags/27_035.FLAGS ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 1403.0863 MHz ,RF2 : 1403.0863 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 1340 MHz, ILO2 : 1340MHz , IVLO1 : 63.0863 MHz, IVLO2 : 63.0863 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 # 8 25. Maximum Channels : 512 26. Channel Numbers : 0:511:1 27. LO5 -1 : 136.9137 28. LO5 -2 : 168.0863 29. Frequency Parameters (TPA) : 1403.0863 1403.0863 1340 1340 63.0863 63.0863 30. Integration Time : 8.053 Sec 31. No of Antennas Working(Fringing) at the beginning :24 32. Name of Non-Working Antennas (with reason for each) : C06 : No feed. E05 : Servo problem. E06 : Cable Tray installation. W03 : Feed Cage Support Truss Painting. S03 : Servo problem. C01 : Low fringe@130pol. 33. Note for Backup : 34. Start and End Time of Obs.(IST): 20 Oct 2014 01:00:00 - 20 Oct 2014 10:18:00 35. ONLINE Machine : Lenyadri 36. No of Antennas Working(Fringing) at the end :24 37. Comments (During Observations) : 01:00 : Started settings. 01:14 : Started scan on 3c147 for ~ 12min. 01:27 : Started command file. 09:22 : All antennas power failed. 09:55 : Started scan on 555+398. 09:51 : C09,C10 and W05 not fringing. 09:56 : Stopped scan. 10:01 : Started scan on 3C286. 10:05 : C09,C10 and W05 started working. 10:18 : Stopped scan and observing session is over.