GTAC Observation Log 1. Date : 16/01/2017 2. Observation Sr. No. : 9138 3. Observer : Poonam Chandra, Wade, Sushma Kurapati, Veronique Petit, Maurice Andrew Leutenegger, David Cohen, Jason H Grunhut 4. Observer's Email : poonam@ncra.tifr.res.in, marmottecam@yahoo.ca, sushma@ncra.tifr.res.in, Vpetit@udel.edu, maurice.a.leutenegger@nasa.gov, dcohen1@swarthmore.edu, jason.grunhut@gmail.com 5. Project Name : Uncovering the intriguing nature of the magnetic O\\+O binary system Plaskett`s star 6. Project Code : 31_105 7. Operator(s) : Navnath, Shilpa 8. Command File : /odisk/gtac/cmd/poonam/31_105/obs.cmd 9. LTA File : /gsbifrdata1/16jan/31_105_16jan2017.lta, /gwbifrdata/16jan/31_105_16jan2017.lta 10. LogFlag File : /odisk/online1/logflags/31_105.FLAGS.2, /odisk/online1/logflags/31_105.FLAGS.1, /odisk/online1/logflags/31_105.FLAGS ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 1399 MHz ,RF2 : 1399 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 1450 MHz, ILO2 : 1450MHz , 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_lenyadri 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 : 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) : 1399 1399 1450 1450 51 51 30. Integration Time : 8.053 Sec 31. No of Antennas Working(Fringing) at the beginning :29 32. Name of Non-Working Antennas (with reason for each) : S04 : abc timeout. 33. Note for Backup : 34. Start and End Time of Obs.(IST): 16 Jan 2017 19:00:00 - 16 Jan 2017 22:21:00 35. ONLINE Machine : Lenyadri 36. No of Antennas Working(Fringing) at the end :28 37. Comments (During Observations) : GWB Settings : 400MHz Bandwidth, 2k Channels, 1450MHz GABLO, Total Intensity. GWB Connection : C00 C01 C02 C04 C05 C06 C10 C14 E02 E04 S01 S02 S06 W01 W02 W05 --------------------------------------------------------------------------- 19:00 : Started settings. 19:15 : Tried for first LO 1050MHz, but some antennas were not fringing in GSB. So changed the settings to full band 1420MHz. tpa 1399 1399 1450 1450 51 51 19:40 : Started scan on 3C48. 19:54 : Stopped scan. 20:02 : '/odisk/gtac/cmd/poonam/31_105/obs.cmd' command file started. 20:57 : E06 servo problem. 22:03 : Stopped command file. 22:08 : Started scan on 3C147. 22:21 : Stopped scan and observing session over.