GTAC Observation Log 1. Date : 24/09/2016 2. Observation Sr. No. : 8904 3. Observer : Raghunathan Srianand, Neeraj Gupta, Rajeshwari Dutta, Ravi Joshi, Patrick Petitjean, Pasquier Noterdaeme 4. Observer's Email : anand@iucaa.in, ngupta@iucaa.in, rdutta@iucaa.in, physistravi@gmail.com, ppetitje@iap.fr, noterdaeme@iap.fr 5. Project Name : %latex% uGMRT Search for 21-cm in $H_2$ bearing systems at z ~2.0-2.6 6. Project Code : 30_084 7. Operator(s) : Pramod, Sachin 8. Command File : /odisk/gtac/cmd/30_084/24sep16/obs.cmd 9. LTA File : /gsbifrdata1/24sep/30_084_24sep2016_gsb.lta, /gwbifrdata1/24sep/30_084_24sep2016_540lo_gwb.lta 10. LogFlag File : /odisk/online1/logflags/30_084.FLAGS.6 ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 387.8785 MHz ,RF2 : 387.8785 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 325 MHz, ILO2 : 325MHz , IVLO1 : 62.8785 MHz, IVLO2 : 62.8785 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_shivneri 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 : 2 MHz; Step # 3 25. Maximum Channels : 512 26. Channel Numbers : 0:511:1 27. LO5 -1 : 137.1215 28. LO5 -2 : 167.8785 29. Frequency Parameters (TPA) : 387.8785 387.8785 325 325 62.8785 62.8785 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) : C14 : ABC time out C10 : Servo problem 33. Note for Backup : 34. Start and End Time of Obs.(IST): 24 Sep 2016 02:00:00 - 24 Sep 2016 07:45:00 35. ONLINE Machine : Shivneri 36. No of Antennas Working(Fringing) at the end :28 37. Comments (During Observations) : GWB settings : GAB LO : 540 MHz. Acq.BW : 100MHz Ch 0 : 540 MHz. Ch 16K : 440 MHz. C14 S03 W03 : No broad band feed. (250-500MHz) --------------------------------------------------------------------- 01:30 : Started set up. 01:31 : Started scan on 3C147 for 15 min. 01:46 : Stopped scan. Note : scan no. 1 : on CTS247 is junk. 01:58 : Started scan on CTS247 for 18 min. 02:15 : Stopped scan and started command file. '/odisk/gtac/cmd/30_084/24sep16/obs.cmd' 07:08 : Stopped command file and recorded phase cal. 07:13 : Stopped scan on phase cal. 07:23 : Started scan on 3C147. 07:38 : Stopped scan on 3C147 and closed observation session.