GTAC Observation Log 1. Date : 01/05/2016 2. Observation Sr. No. : 8542 3. Observer : Ewan O`Sullivan, Nimisha Kantharia 4. Observer's Email : eosullivan@cfa.harvard.edu, ngk@ncra.tifr.res.in 5. Project Name : The origin of the HI trail and ultra-steep radio structure in the NGC 5903/NGC 5898 group 6. Project Code : 30_020 7. Operator(s) : Rupsing 8. Command File : /odisk/gtac/cmd/ngk/30_020/30apr16-610fullpolar.cmd 9. LTA File : /gsbifrdata/30apr/30_020_30apr2016.lta 10. LogFlag File : /odisk/online1/logflags/30_020.FLAGS.1 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+12 dB, 32 MHz,ON, IF-CH2 : 4+12 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 :28 32. Name of Non-Working Antennas (with reason for each) : C01 : BLDC. S01 : Feed cage painting. 33. Note for Backup : 34. Start and End Time of Obs.(IST): 30 Apr 2016 22:00:00 - 01 May 2016 06:00:00 35. ONLINE Machine : Shivneri 36. No of Antennas Working(Fringing) at the end :28 37. Comments (During Observations) : 22:18 : Started command file with flux cal. 05:16 : Stopped command file after source. 05:27 : As phase cal was set, directly started scan on 3C468.1(no other 3C sources available). 05:40 : Stopped scan on 3C468.1. 05:44 : Started scan on B1937+21(As per direction in command file) 06:00 : Stopped scan on B1937+21 and closed observation session.