GTAC Observation Log 1. Date : 06/05/2017 2. Observation Sr. No. : 9351 3. Observer : Somak Raychaudhury, Dharam Vir Lal, Konstantinos Kolokythas 4. Observer's Email : somak@iucaa.in, dharam@ncra.tifr.res.in, kkolok@iucaa.in 5. Project Name : Revisiting the brightest AGN feeback sources in galaxy clusters with uGMRT 6. Project Code : 32_041 7. Operator(s) : Nilesh, Rupsing 8. Command File : /odisk/gtac/cmd/32_041/obs.cmd 9. LTA File : /gwbifrdata/05may/32_041_05may2017.lta, /gwbifrdata1/05may/32_041_05may2017.lta.2, /gwbifrdata1/05may/32_041_05may2017.lta.1, /gwbifrdata1/05may/32_041_05may2017.lta 10. LogFlag File : /odisk/online1/logflags/32_041.FLAGS ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 306 MHz ,RF2 : 306 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 255 MHz, ILO2 : 255MHz , 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 : 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) : 306 306 255 255 51 51 30. Integration Time : 16.1061 Sec 31. No of Antennas Working(Fringing) at the beginning :27 32. Name of Non-Working Antennas (with reason for each) : C04 : No fringe. C11 : Not released for observation (Servo work). C14 : Not released for observation (Mechanical work). 33. Note for Backup : 34. Start and End Time of Obs.(IST): 05 May 2017 19:00:00 - 06 May 2017 00:02:00 35. ONLINE Machine : Lenyadri 36. No of Antennas Working(Fringing) at the end :27 37. Comments (During Observations) : 18:30 : Started settings. ------------GWB Settings--------- GPU_MODE : Realtime GPU_LTA : 4 GPU_ACQ_BW : 200.0000 GPU_CHAN_MAX : 2048 GPU_CHAN_NUM : 0:2047:1 GPU_STOKES : Total_Intensity GPU_RF4 : 500 500 GPU_DDCLO4 : 0.0000 0.0000 GPU_SB4 : 1 1 GCODE4 : 32_041 ----------------------------------------------------------------------- 18:46:18 : Started scan on 3C286 for ~ 23.8013 min. 19:15:04 : Started scan on 3C286 for ~ 5.03316 min. 19:24:20 : Started scan on 3C286 for ~ 12.0348 min. 19:38:16 : Started scan on 3C286 for ~ 53.4186 min. 19:00 : Scintillation's in the data, Initially thought that It is GWB problem, so restarted GWB two-three times, but while looking at GSB data also, recorded in parallel with GWB, around 19:40 IST, confirmed that it could be due to scintillation, as phase variation and amplitude variation symptoms are roughly similar in the data from GSB as well as GWB. ----------------------------------------------------------------------- 20:30 : Scintillation looks better than earlier, restarted scan on 3C286. 21:00 : Stopped scan. 21:02 : Started command file. 23:44 : Stopped command file. 23:45 : Started scan on 3C286. 00:00 : Stopped scan and observation session over.