GTAC Observation Log 1. Date : 31/07/2017 2. Observation Sr. No. : 9623 3. Observer : Neeraj Gupta, Jamie Stephen Farnes, Aditya JNHS, Sanjay Bhatnagar, Preshanth Jagannathan, Raghunathan Srianand, Patrick Petitjean, Pasquier Noterdaeme 4. Observer's Email : ngupta@iucaa.in, jamiefarnes23@gmail.com, adityaj@iucaa.in, sbhatnag@aoc.nrao.edu, pjaganna@nrao.edu, anand@iucaa.in, ppetitje@iap.fr, noterdaeme@iap.fr 5. Project Name : Evolution of magnetic fields in galaxies traced by intervening absorbers 6. Project Code : 32_105 7. Operator(s) : Deepak, Nilesh, Shilpa 8. Command File : /odisk/gtac/cmd/32_105/30jul2017.cmd 9. LTA File : /gsbifrdata1/31jul/32_105_31jul2017_gsb.lta, /gwbifrdata2/31jul/32_105_31jul2017_gwb.lta 10. LogFlag File : /odisk/online1/logflags/32_105.FLAGS.4 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 : 540MHz , IVLO1 : 51 MHz, IVLO2 : 51 MHz 13. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 4+14 dB, 32 MHz,ON, IF-CH2 : 4+14 dB, 32 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 : Full_Stokes 21. Beam - 1 : OFF 22. Beam - 2 : OFF 23. ACQ BW : 33.333333 MHz 24. Final BW : 0 MHz; Step # 0 25. Maximum Channels : 256 26. Channel Numbers : 0:255:1 27. LO5 -1 : 149 28. LO5 -2 : 156 29. Frequency Parameters (TPA) : 591 591 540 540 51 51 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) : C02 : For callsheet work. C06 : Servo problem. C09 : Servo timeout. W03 : Reflector surface refurbishment work. S02 : Servo problem. 33. Note for Backup : 34. Start and End Time of Obs.(IST): 31 Jul 2017 13:35:00 - 31 Jul 2017 19:10:00 35. ONLINE Machine : Shivneri 36. No of Antennas Working(Fringing) at the end :27 37. Comments (During Observations) : ------------GWB Setting---------------------------------------------------- GPU_MODE : Realtime GPU_LTA : 4 GPU_ACQ_BW : 400.0000 GPU_FINAL_BW : 400.0000 GPU_EDGE_FRQ : 0 GPU_CHAN_MAX : 2048 GPU_CHAN_NUM : 0:2047:1 GPU_STOKES : Full_Stokes GPU_SIDEBAND : 1 1 GPU_RF4 : 900 900 GPU_DDCLO4 : 0.0000 0.0000 GPU_SB4 : 1 1 GCODE4 : 32_105 GPU_CNTRL : ONLINE GPU_FSTOP : ON GPU_BEAM_1 : OFF GPU_BEAM_2 : OFF GPU_BEAM_3 : OFF GPU_BEAM_4 : OFF GPU_BM_INT : 4 --------------------------------------------------------------------------- 13:50 : Started settings. 14:09 : '/odisk/gtac/cmd/32_105/30jul2017.cmd' command file started. 14:26 : C06 started working. 15:14 : E05 & E06 Very low fringe after Strong RFI. 16:00 : S02 Started working. 16:42 : C09 Started working. 18:24 : C02 Started working. 18:49 : Stopped command file. 18:50 : Started scan on 3C286. 19:00 : Stopped scan and observing session over.