GTAC Observation Log 1. Date : 21/12/2017 2. Observation Sr. No. : 9972 3. Observer : Robert Main, Dongzi Li, FangXi Lin, Nikhil Mahajan, Ue Li Pen, Keith Vanderlinde, Marten H vanKerkwijk, I-Sheng Yang 4. Observer's Email : main@astro.utoronto.ca, dzli@cita.utoronto.ca, flin@cita.utoronto.ca, mahajan@astro.utoronto.ca, pen@cita.utoronto.ca, vanderlinde@di.utoronto.ca, mhvk@astro.utoronto.ca, iyang@perimeterinstitute.ca 5. Project Name : Understanding the Extreme Lensing Events of the Black Widow`s radio eclipse 6. Project Code : 33_012 7. Operator(s) : Pramod, Rupsing 8. Command File : /odisk/gtac/cmd/33_012/obs.cmd 9. LTA File : /gsbifrdata1/21dec/33_012_21dec2017.lta.1, /gsbifrdata1/21dec/33_012_21dec2017.lta, /gwbifrdata2/21dec/33_012_21dec2017.lta.2, /gwbifrdata2/21dec/33_012_21dec2017.lta.1, /gwbifrdata2/21dec/33_012_21dec2017.lta 10. LogFlag File : /odisk/online1/logflags/33_012.FLAGS.2 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 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 : 16.1061 Sec 31. No of Antennas Working(Fringing) at the beginning :29 32. Name of Non-Working Antennas (with reason for each) : W04 : Servo problem. 33. Note for Backup : 34. Start and End Time of Obs.(IST): 21 Dec 2017 18:00:00 - 21 Dec 2017 21:10:00 35. ONLINE Machine : Lenyadri 36. No of Antennas Working(Fringing) at the end :29 37. Comments (During Observations) : ------------GWB Setting--------- GPU_MODE : Realtime GPU_LTA : 4 GPU_ACQ_BW : 200.0000 GPU_FINAL_BW : 200.0000 GPU_EDGE_FRQ : 0 GPU_CHAN_MAX : 2048 GPU_CHAN_NUM : 0:2047:1 GPU_STOKES : Total_Intensity GPU_SIDEBAND : 1 1 GPU_RF4 : 500 500 GPU_DDCLO4 : 0.0000 0.0000 GPU_SB4 : -1 -1 GCODE4 : 32_012 GPU_CNTRL : ONLINE GPU_FSTOP : ON GPU_BEAM_1 : Voltage GPU_BEAM_2 : OFF GPU_BEAM_3 : OFF GPU_BEAM_4 : OFF GPU_BM_INT : 8 GPU_GAINEQ : OFF GPU_TPA : From GWB GUI. GPU_BITS : 64 inputs. GPU_FILRFI : RFI Filterring OFF GPU_BEAM_S : OFF -------------------------------- Data recorded on /data6 and /data4 disk of gwbh7 machine. Antennas selected in GSB and GWB GAC are : Central square + First two arm antennas. 17:30 : Started set up. 17:80 : Power equalized and phasing done on 1859+129. 18:20 : Started command file. '/odisk/gtac/cmd/33_012/obs.cmd' 21:00 : Stopped command file and observation session is over.