GTAC Observation Log 1. Date : 17/01/2023 2. Observation Sr. No. : 15021 3. Observer : Poonam Chandra, James Leung, Luca Izzo, Harsh Kumar, Tara Murphy, Shriharsh P. Tendulkar, Varun Bhalerao 4. Observer\'s Email : pchandra@nrao.edu, jleu9465@uni.sydney.edu.au, luca.izzo@gmail.com, harshkosli13@gmail.com, tara.murphy@sydney.edu.au, shriharsh.tendulkar@tifr.res.in, varunb@iitb.ac.in 5. Project Name : Lowest frequency observations of the brightest gamma-ray burst ever: A case for joint uGMRT and ASKAP observations 6. Project Code : ddtC251 7. Operator(s) : Pramod 8. Command File : /data1/gtac/cmd/ddtc251/ddtC251_17Jan2023_0800_cmd.py 9. LTA File : /gsbifrdata1/17jan/ddtc251_17jan2023_gsb.lta, /gwbifrdata2/17jan/ddtc251_17jan2023_gwb.lta 10. LogFlag File : ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 1409 MHz ,RF2 : 1409 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 1460 MHz, ILO2 : 1460MHz , 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/TGC 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) : 1409 1409 1460 1460 51 51 30. Integration Time : 8.053 Sec 31. No of Antennas Working(Fringing) at the beginning :29 32. Name of Non-Working Antennas (with reason for each) : W04 : Strong RFI 33. Note for Backup : 34. Start and End Time of Obs.(IST): 17 Jan 2023 07:00:00 - 17 Jan 2023 09:00:00 35. ONLINE Machine : TGC 36. No of Antennas Working(Fringing) at the end :29 37. RFI Status : 38. Comments (During Observations) : ------------GWB Setting--------- GPU_MODE : Realtime GPU_LTA : 4 GPU_ACQ_BW : 200.0000 GPU_FINAL_BW : 200 GPU_EDGE_FRQ : 0 GPU_CHAN_MAX : 2048 GPU_CHAN_NUM : 0:2047:1 GPU_STOKES : Total_Intensity GPU_SIDEBAND : 1 1 GPU_RF4 : 1460 1460 GPU_DDCLO4 : 0.0000 0.0000 GPU_SB4 : 1 1 GCODE4 : DDTC251 GPU_CNTRL : ONLINE/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 : 8 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_WALSH : OFF GPU_ENV : RELEASED -------------------------------- 07:00 : Started set up. 07:17 : Started command file. \'/data1/gtac/cmd/ddtc251/ddtC251_17Jan2023_0800_cmd.py\'\' NOTE : AS target source was in inner track.Hence change track to inner track.There antennas took time for slewing to target source. 09:00 : Stopped command file and observation session is over.