GTAC Observation Log 1. Date : 14/03/2015 2. Observation Sr. No. : 7674 3. Observer : Manash Ranjan Samal, Jessy Jose, Arti Goyal, Devendra Kumar Ojha 4. Observer's Email : manash.samal@oamp.fr, jessy@iiap.res.in, arti.aries@gmail.com, ojha@tifr.res.in 5. Project Name : Studying ionized gas content of the HII complex SH2-252 with GMRT. 6. Project Code : 27_053 7. Operator(s) : Navnath, Nilesh, Pramod, Surender 8. Command File : /odisk/gtac/cmd/27_053/obsmar14.cmd 9. LTA File : /gsbifrdata/14mar/27_053_14mar2015.lta 10. LogFlag File : /odisk/online1/logflags/27_053.FLAGS.1 ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 253 MHz ,RF2 : 253 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 304 MHz, ILO2 : 304MHz , IVLO1 : 51 MHz, IVLO2 : 51 MHz 13. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 10+14 dB, 32 MHz,ON, IF-CH2 : 10+14 dB, 32 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 : 33.333333 MHz 24. Final BW : 33.333333 MHz; Step # 25. Maximum Channels : 256 26. Channel Numbers : 0:255:1 27. LO5 -1 : 149 28. LO5 -2 : 156 29. Frequency Parameters (TPA) : 253 253 304 304 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) : C10 : No Fringe (150 MHz feed focus). W03 : No Fringe, MCM 5 time out. W05 : Feed Cage Painting. S04 : ABC time out. W04 : Low fringe @ 175 pol. 33. Note for Backup : 34. Start and End Time of Obs.(IST): 14 Mar 2015 14:00:00 - 14 Mar 2015 23:04:00 35. ONLINE Machine : Lenyadri 36. No of Antennas Working(Fringing) at the end :28 37. Comments (During Observations) : 13:45 : Started settings. 14:02 : Started scan on 3c48 for ~ 16 min. 14:21 : Started command file. /odisk/gtac/cmd/27_053/obsmar14.cmd 14:33 : Scan # 2 BAD, antennas were not tracking, stopped command file. 14:45 : Re-started command file. 17:58 : S04,W03 and W05 Started working. 18:03 : E05 ABC time out. 18:08 : C12 ABC time out. 22:40 : C12 and E05 started working. 22:47 : Stopped command file. 22:49 : Started scan on 3C147. 23:04 : Stopped scan and observation session is over.