GTAC Observation Log 1. Date : 25/01/2022 2. Observation Sr. No. : 13886 3. Observer : Ayan Biswas, Poonam Chandra, Barnali Das, Wade, James Barron 4. Observer\'s Email : ayan.scc2@gmail.com, poonam@ncra.tifr.res.in, barnali@ncra.tifr.res.in, marmottecam@yahoo.ca, j.barron@queensu.ca 5. Project Name : Detailed Study of the Magnetic O-star Binary HD148937: The First Ever Magnetic O-star System Detected at Sub-GHz Frequencies 6. Project Code : 41_009 7. Operator(s) : Rupsing, Shriram 8. Command File : /data1/gtac/cmd/41_009/25_Jan/obs.py 9. LTA File : /gwbifrdata2/25jan/41_009_25jan2022_gwb_b5.lta, /gwbifrdata2/25jan/41_009_25jan2022_gwb_b4.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+12 dB, 32 MHz,ON, IF-CH2 : 4+12 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 : 4.0265 Sec 31. No of Antennas Working(Fringing) at the beginning :26 32. Name of Non-Working Antennas (with reason for each) : C03 : Mechanical Work. C06 : Low fringe at 130 pol. E05 : Low self power at 130 pol. E04 : Low self power. 33. Note for Backup : 34. Start and End Time of Obs.(IST): 25 Jan 2022 06:00:00 - 25 Jan 2022 11:05:00 35. ONLINE Machine : TGC 36. No of Antennas Working(Fringing) at the end :25 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_RF3 : 550 550 GPU_DDCLO3 : 0.000000 0.000000 GPU_SB3 : -1 -1 GCODE3 : 41_009A GPU_RF4 : 1460 1460 GPU_DDCLO4 : 0.0000 0.0000 GPU_SB4 : -1 -1 GCODE4 : 41_009B 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 : 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_WALSH : OFF GPU_ENV : RELEASED -------------------------------- 06:06 : Started command file. ------------------------------------------------------------ 06:35 : Target source bellow horizon(rise @06:44) ------------------------------------------------------------ 06:38 : Restarted command file. 10:00 : C09 down due to high temperature. 10:45 : Command file stopped. 10:55 : Started scan on 3C286~ 10 min. 11:05 : Scan stopped and observing session over.