GTAC Observation Log 1. Date : 25/09/2020 2. Observation Sr. No. : 12457 3. Observer : Andra Stroe, Lorenzo Lovisari, Scott W Randall, william richard forman, Christine Jones, Shimwell, Reinout Johannes vanWeeren, HIROKI AKAMATSU, Ralph Kraft, Grant Tremblay 4. Observer\'s Email : andra.stroe@cfa.harvard.edu, lorenzo.lovisari@cfa.harvard.edu, srandall@cfa.harvard.edu, wrf@cfa.harvard.edu, cjones@cfa.harvard.edu, shimwell@strw.leidenuniv.nl, rvweeren@strw.leidenuniv.nl, h.akamatsu@sron.nl, rkraft@cfa.harvard.edu, grant.tremblay@cfa.harvard.edu 5. Project Name : A spectacular LOFAR-selected merging galaxy cluster 6. Project Code : 38_062 7. Operator(s) : Pramod, Shilpa, Shriram 8. Command File : /data1/gtac/cmd/38_062/obs.py 9. LTA File : /gsbifrdata1/25sep/38_062_25sep2020_gsb.lta, /gwbifrdata1/25sep/38_062_25sep2020_gwb.lta 10. LogFlag File : 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+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) : 591 591 540 540 51 51 30. Integration Time : 4.0265 Sec 31. No of Antennas Working(Fringing) at the beginning :27 32. Name of Non-Working Antennas (with reason for each) : C03 : Mechanical Work. C00 : Feed jammed. S04 : Maintenance. (Feed and Servo) 33. Note for Backup : 34. Start and End Time of Obs.(IST): 25 Sep 2020 06:00:00 - 25 Sep 2020 12:00:00 35. ONLINE Machine : TGC 36. No of Antennas Working(Fringing) at the end :25 37. RFI Status : 38. Comments (During Observations) : 06:05 : Started settings. ------------------------------------------------------------------------ gsb_beam2_dataserver,node_34 bandmask,3 gpu_beam4_dataserver,gwbh10 GSB_LTA,8 GPU_FSTOP,1 GPU_PFB,0 GPU_FILRFI,0 GSB_CHAN_NUM,0:255:1 GSB_ACQ_BW,33.333333 GPU_BEAM_1,0:1 GSB_FINAL_BW,0 GPU_PFB_TAPS,16 GSB_ENV,1 gpu_ifr_dataserver,gwbh6 gpu_beam3_dataserver,gwbh9 GPU_CHAN_NUM,0:8191:1 GSB_HOSTS,0 GPU_BEAM_S,0 gsb_ifr_dataserver,gsbm4 GSB_STOKES,4 GPU_DDC,0 GSB_CNTRL,1 GPU_CNTRL,1 gpu_beam2_dataserver,gwbh8 GPU_GAINEQ,1 gsb_beam1_dataserver,node_33 GPU_EDGE_FRQ,0 GSB_BEAM_1,0:1 GPU_BM_INT,8 GSB_BEAM_2,0:1 GPU_BEAM_3,0:1 GPU_BEAM_2,0:4 GSB_FSTOP,1 GPU_CHAN_MAX,8192 GPU_BEAM_4,0:4 corrmask,8 GPU_ENV,1 antennamask,3fffffff GPU_HOSTS,2 GPU_MODE,0 GPU_STOKES,4 GSB_GAINEQ,1 GSB_CD_MODE,0 GSB_CHAN_MAX,256 GPU_TPA,0 GPU_ACQ_BW,400.0000 GPU_LTA,4 GSB_BB_LO,149000000.0:156000000.0 GSB_MODE,0 GPU_FINAL_BW,1 gpu_beam1_dataserver,gwbh7 GPU_BITS,4 ------------------------------------------------------------------------- 06:30 : Started scan on 3c147. 06:40 : It observed that GAB LO was not set. 06:45 : restarted setup for GWB. ------------------------------------------------------------------------- 07:01 : Started scan on 3C147. 07:11 : Stopped scan and started command file. \'/data1/gtac/cmd/38_062/obs.py\' NOTE : Missing blocks observed during recording of data. 09:45 : Electrical power failure to South arm antennas. 10:00 : W02 servo problem. 10:30 : C12 taken for Front End work. 12:20 : Stopped command file. 12:25 : Started scan on 3C286. 12:35 : Stopped scan and observation session is over.