GTAC Observation Log 1. Date : 23/05/2020 2. Observation Sr. No. : 12027 3. Observer : Nayana AJ, Poonam Chandra, Rupak Roy, Varun Bhalerao 4. Observer\'s Email : nayan89deva@gmail.com, poonam@ncra.tifr.res.in, rupakroy1980@gmail.com, varunb@iitb.ac.in 5. Project Name : uGMRT observations of a fast rising optical transient - AT 2018COW 6. Project Code : 38_073 7. Operator(s) : Navnath 8. Command File : /odisk/gtac/cmd/37_073/23may20/obs_23may.txt 9. LTA File : /gwbifrdata1/22may/38_073_23may2020_gwb.lta, /gsbifrdata1/23may/38_073_23may2020_gsb.lta 10. LogFlag File : /odisk/online1/logflags/TST2209.FLAGS, /odisk/online1/logflags/38_073.FLAGS.1 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 : 8.053 Sec 31. No of Antennas Working(Fringing) at the beginning :28 32. Name of Non-Working Antennas (with reason for each) : C03 : & W02 : Maintenance 33. Note for Backup : 34. Start and End Time of Obs.(IST): 23 May 2020 00:00:00 - 23 May 2020 03:00:00 35. ONLINE Machine : Shivneri 36. No of Antennas Working(Fringing) at the end :28 37. RFI Status : 38. Comments (During Observations) : ------------GWB Setting--------- GPU_MODE : Realtime GPU_LTA : 4 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 : Total_Intensity GPU_SIDEBAND : 1 1 GPU_RF4 : 550 500 GPU_DDCLO4 : 0.0000 0.0000 GPU_SB4 : -1 -1 GCODE4 : 38_073 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 : 128 GPU_GAINEQ : OFF GPU_TPA : From GWB GUI. GPU_BITS : 4 Bits GPU_FILRFI : RFI Filterring OFF GPU_BEAM_S : OFF -------------------------------- ----------------------------------------------------------------------- 00:00:00 : Started setup. 00:15:20 : Started scan on 3C286 for ~ 11.5427 min. 00:31:19 : Started scan on 1609+266 for ~ 4.83183 min. 00:39:44 : Started scan on SN2018COW for ~ 30.6016 min. 01:11:19 : Started scan on 1609+266 for ~ 4.96605 min. 01:19:37 : Started scan on SN2018COW for ~ 30.3332 min. 01:51:06 : Started scan on 1609+266 for ~ 4.96605 min. 01:59:25 : Started scan on SN2018COW for ~ 30.3332 min. 02:30:43 : Started scan on 1609+266 for ~ 4.96605 min. 02:38:43 : Started scan on SN2018COW for ~ 25.904 min. 03:06:00 : Started scan on 1609+266 for ~ 4.02653 min. 03:12:25 : Started scan on 3C286 for ~ 7.78462 min. 03:20:00 : Observation session over -----------------------------------------------------------------------