GTAC Observation Log 1. Date : 03/10/2021 2. Observation Sr. No. : 13568 3. Observer : Tasha Gautam, Paulo Cesar Freire, Yashwant Gupta, Alessandro Ridolfi, Robert Wharton 4. Observer\'s Email : tgautam@mpifr-bonn.mpg.de, pfreire@mpifr-bonn.mpg.de, ygupta@ncra.tifr.res.in, alessandro.ridolfi@inaf.it, wharton@mpifr-bonn.mpg.de 5. Project Name : Following up radio sources in globular cluster NGC 6652 6. Project Code : 40_063 7. Operator(s) : Nilesh, Rupsing 8. Command File : /data1/gtac/cmd/40_063/03oct21/cmd_40_063_03oct.py 9. LTA File : /gsbifrdata1/03oct/40_063_03oct2021_gsb.lta, /gwbifrdata1/03oct/40_063_03oct2021_gwb.lta 10. LogFlag File : ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 306 MHz ,RF2 : 306 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 255 MHz, ILO2 : 255MHz , 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) : 306 306 255 255 51 51 30. Integration Time : 2.0132 Sec 31. No of Antennas Working(Fringing) at the beginning :27 32. Name of Non-Working Antennas (with reason for each) : C03 : Mechanical Work. E04 : Servo problem. E02 : Strong RFI. 33. Note for Backup : 34. Start and End Time of Obs.(IST): 03 Oct 2021 16:00:00 - 03 Oct 2021 21:20:00 35. ONLINE Machine : TGC 36. No of Antennas Working(Fringing) at the end :27 37. RFI Status : 38. Comments (During Observations) : 16:00 : Started settings. ------------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 : 500 500 GPU_DDCLO4 : 0.0000 0.0000 GPU_SB4 : -1 -1 GCODE4 : 40_063 GPU_CNTRL : ONLINE/TGC GPU_FSTOP : ON GPU_BEAM_1 : VOLTAGE GPU_BEAM_2 : PA 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 : OFF GPU_PFB_TAPS : 4 GPU_BEAM_BIT : 16 GPU_VLT_BIT : 8 GPU_WALSH : OFF GPU_ENV : RELEASED -------------------------------- # GWB GAC configuration is as follows : # BEAM-1:130 :: C00 C01 C02 C04 C05 C06 C08 C09 C10 C11 C12 C13 C14 E03 S01 S02 S03 S04 W01 W02 W03 W04 Total=22 # BEAM-1:175 :: C00 C01 C02 C04 C05 C06 C08 C09 C10 C11 C12 C13 C14 E03 S01 S02 S03 S04 W01 W02 W03 W04 Total=22 # BEAM-2:130 :: C00 C01 C02 C04 C05 C06 C08 C09 C10 C11 C12 C13 C14 Total=13 # BEAM-2:175 :: C00 C01 C02 C04 C05 C06 C08 C09 C10 C11 C12 C13 C14 Total=13 GWB Pulsar data recording disks : gwbh7:/data5/gpuuser/40_063_data5_03oct2021/* gwbh8:/data5/gpuuser/40_063_data5_03oct2021/* 16:15 : Started power eq and phasing on 1830-360. 16:22 : Started command file. /data1/gtac/cmd/40_063/03oct21/cmd_40_063_03oct.py 17:13 : Command file got killed automatically. Noticed around 17:28. Scan was not running from 17:13 to 17:28. 17:40 : DATA disks for pulsar recording changed to : gwbh7:/data8/gpuuser/40_063_data8_03oct2021/* gwbh8:/data3/gpuuser/40_063_data3_03oct2021/* 20:10 : Very quick de-phasing of array observed for phasing iteration on 1830-360 around 20:00 IST. Tried re-phasing multiple times, then continued with remaining command file. 21:18 : Stopped command file and observation closed.