GTAC Observation Log 1. Date : 06/07/2021 2. Observation Sr. No. : 13274 3. Observer : Subhashis Roy, Jun-Hui Zhao, Mark Root Morris, Miller Goss 4. Observer\'s Email : roy@ncra.tifr.res.in, jzhao@cfa.harvard.edu, morris@astro.ucla.edu, mgoss@nrao.edu 5. Project Name : Study of the Galactic center compact radio sources with uGMRT at 1.4 GHz 6. Project Code : 40_098 7. Operator(s) : Nilesh, Pramod, Shilpa, Shriram 8. Command File : /data1/gtac/cmd/roy/obs_1.py,, /data1/gtac/cmd/roy/obs_2.py,, /data1/gtac/cmd/roy/cal_06jul21.py, 9. LTA File : /gsbifrdata/05jul/40_098_05jul2021_gsb.lta, /gsbifrdata1/05jul/40_098_05jul2021_band5_pntg_gsb.lta.1, /gsbifrdata1/05jul/40_098_05jul2021_band5_pntg_gsb.lta, /gwbifrdata/05jul/40_098_05jul2021_gwb.lta, /gwbifrdata1/05jul/40_098_05jul2021_band5_pntg_gwb.lta.1, /gwbifrdata1/05jul/40_098_05jul2021_band5_pntg_gwb.lta 10. LogFlag File : 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 : 24+4 dB, 32 MHz,OFF, IF-CH2 : 24+4 dB, 32 MHz,OFF GSB SETTINGS : 14. GSB Host : gsbm1_shivneri 15. GSB Mode : Realtime 16. GSB LTA : 8 17. GSB CTRL : ONLINE/TGC 18. GSB Fstop : ON 19. GAIN EQ : OFF 20. Stokes : Full_Stokes 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 : 16.1061 Sec 31. No of Antennas Working(Fringing) at the beginning :27 32. Name of Non-Working Antennas (with reason for each) : C03 : Mechanical Work. C01 : Bad bandshape. E05 : GAB disconnected. 33. Note for Backup : 34. Start and End Time of Obs.(IST): 05 Jul 2021 19:00:00 - 06 Jul 2021 04:00:00 35. ONLINE Machine : TGC 36. No of Antennas Working(Fringing) at the end :27 37. RFI Status : 38. Comments (During Observations) : ------------GWB Setting--------------------------------------------------- GPU_MODE : Realtime GPU_LTA : 4 GPU_ACQ_BW : 400.0000 GPU_FINAL_BW : 400 GPU_EDGE_FRQ : 0 GPU_CHAN_MAX : 2048 GPU_CHAN_NUM : 0:2047:1 GPU_STOKES : Full_Stokes GPU_SIDEBAND : 1 1 GPU_RF4 : 1450 1450 GPU_DDCLO4 : 0.0000 0.0000 GPU_SB4 : 1 1 GCODE4 : 40_098 GPU_CNTRL : TGC GPU_FSTOP : ON GPU_BEAM_1 : OFF GPU_BEAM_2 : OFF GPU_BEAM_3 : OFF GPU_BEAM_4 : OFF GPU_BM_INT : 8 GPU_GAINEQ : ON GPU_TPA : From online/TGC tpa GPU_BITS : 4 Bits GPU_FILRFI : RFI Filterring OFF GPU_BEAM_S : OFF GPU_PFB : ON GPU_PFB_TAPS : 4 GPU_BEAM_BIT : 16 GPU_VLT_BIT : 8 GPU_ENV : RELEASED -------------------------------------------------------------------------- 19:00 : Started settings. 19:15 : AGN1 got hang. 19:20 : AGN1 restarted. 19:30 : Restarted GSB and GWB. 20:00 : Power equalized on 3C286 @ 75 counts for GSB and 50 for GWB. 20:02 : \'/data1/gtac/cmd/roy/obs_1.py\' command file started. 20:20 : Stopped command file. 20:30 : Started grid pointing. 20:32 : AGN1 again hang, due to this correlator got wrong source. 20:35 : Restarted grid pointing. 20:55 : Started command file, \'/data1/gtac/cmd/roy/obs_2.py\' 22:20 : Command file stopped. 22:23 : Pointing started. 22:45 : Ant offsets corrected and updated. 22:47 : Command file started, \'/data1/gtac/cmd/roy/obs_2.py\' 00:50:00 : Stopped command file. 00:56:38 : Started scan on 2136+006 for ~ 5.18975 min. 01:09:00 : Re-started command file. \'/data1/gtac/cmd/roy/obs_2.py\' 03:13:00 : Stopped command file. 03:18:55 : Started scan on 2136+006 for ~ 5.18975 min. 03:31:05 : Started scan on 3C48 for ~ 5.18975 min. 03:38:30 : Started scan on 0319+415 for ~ 5.01079 min. 03:45:38 : Started scan on 3C84_OFF for ~ 15 min. 04:01 : Stopped scan and observation closed.