GTAC Observation Log 1. Date : 14/09/2018 2. Observation Sr. No. : 10532 3. Observer : Poonam Chandra, Tarraneh Eftekhari, Edo Berger, Nayana AJ 4. Observer's Email : poonam@ncra.tifr.res.in, teftekhari@cfa.harvard.edu, eberger@cfa.harvard.edu, nayan89deva@gmail.com 5. Project Name : Characterising the late time nature of a tidal disruption event Sw 1644\\+57 at low frequencies 6. Project Code : 34_104 7. Operator(s) : Nilesh, Pramod, Sachin, Surender 8. Command File : /odisk/gtac/cmd/poonam/34_104-14sep2018/obs.txt 9. LTA File : /gsbifrdata/14sep/34_104_14sep2018_gsb.lta, /gwbifrdata1/14sep/34_104_14sep2018_gwb.lta 10. LogFlag File : /odisk/online1/logflags/34_104.FLAGS 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 : 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) : 591 591 540 540 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) : C14 : : Taken for Mech work. E03 : : Low fringe. W03 : : 175 pol low fringe. 33. Note for Backup : 34. Start and End Time of Obs.(IST): 14 Sep 2018 14:00:00 - 14 Sep 2018 21:05:00 35. ONLINE Machine : Shivneri 36. No of Antennas Working(Fringing) at the end :27 37. Comments (During Observations) : 14:00 : Started set-up. ------------GWB Setting--------- GPU_MODE : Realtime GPU_LTA : 1 GPU_ACQ_BW : 400.0000 GPU_FINAL_BW : 400.0000 GPU_EDGE_FRQ : 0 GPU_CHAN_MAX : 2048 GPU_CHAN_NUM : 0:2047:1 GPU_STOKES : Full_Stokes GPU_SIDEBAND : 1 1 GPU_RF4 : 550 550 GPU_DDCLO4 : 0.0000 0.0000 GPU_SB4 : -1 -1 GCODE4 : 34_104 GPU_CNTRL : ONLINE GPU_FSTOP : ON GPU_BEAM_1 : OFF GPU_BEAM_2 : OFF GPU_BEAM_3 : OFF GPU_BEAM_4 : OFF GPU_BM_INT : 32 GPU_GAINEQ : OFF GPU_TPA : From GWB GUI. GPU_BITS : 4 Bits GPU_FILRFI : RFI Filterring OFF GPU_BEAM_S : OFF -------------------------------- 14:00 : Started set-up. ----------------------------------------------------------------------- 14:07:39 : Started scan on 3C286 for ~ 9.9321 min. 14:17:00 : MSEB power failure to all antennas. 14:35:54 : Started command file. "/odisk/gtac/cmd/poonam/34_104-14sep2018/obs.txt" 15:16 : Y-antenna Power resets. stopped command file. E02,E05,E0,S02,S03,S04,W03,W04,W05 lost their settings. 15:28:40 : Started scan on 1634+627 for ~ 4.83183 min. 15:32 : S02,S03,W03,W04 got power resets followed by Electrical power switchover, Stopped command file. 15:36:58 : Started scan on SW1644 for ~ 2.2817 min. 15:40 : C-Sq antennas power swithover, stopped command file. 15:51 : Restarted command file with scan on phase cal. E02,E05,E0,S02,S03,S04,W03,W04,W05 restored back for observation. 17:28 : Stopped command file. 17:31 : Started scan on 3C286 for ~ 10 min. 17:43 : Restarted command file. 20:48 : Stopped command file, and started scan on phase cal. 20:55 : Started scan on 3C468.1 21:05 : Stopped scan and observation over. -----------------------------------------------------------------------