GTAC Observation Log 1. Date : 03/01/2021 2. Observation Sr. No. : 12760 3. Observer : BHAL CHANDRA JOSHI, Yashwant Gupta, Manjari Bagchi, Gopakumar Achamveedu, Shantanu Desai, Prabu Thiagaraj, Abhimanyu Susobhanan, Dhruv Pathak, LANKESWAR DEY, Jaikhomba Singha, Arpita Choudhary, Neelam Dhanda Batra, Krishnakumar MA, Yogesh Maan, Mayuresh Surnis, Suryarao Bethapudi, ARUN KUMAR NAIDU, SAICHAITANYA SUSARLA, Avishek kumar Basu, Nobleson Kunjappy, Raghav Prafulla Girgaonkar, Kishalay De, Periasamy K. Manoharan 4. Observer\'s Email : bcj@ncra.tifr.res.in, ygupta@ncra.tifr.res.in, manjari.bagchi@gmail.com, gopu.tifr@gmail.com, shntn05@gmail.com, prabu@rri.res.in, s.abhimanyu@tifr.res.in, pathakdhruv9786@gmail.com, LANKY441@GMAIL.COM, mjaikhomba@gmail.com, arp.astro@gmail.com, neelam.dhanda@gmail.com, kk.ambalappat@gmail.com, maan@astron.nl, mayuresh.surnis@mail.wvu.edu, ep14btech11008@iith.ac.in, arun@ncra.tifr.res.in, saichaitanya16@iisertvm.ac.in, avishek@ncra.tifr.res.in, nobleson.phy@gmail.com, ep17btech11016@iith.ac.in, kde@caltech.edu, mano@ncra.tifr.res.in 5. Project Name : Indian Pulsar Timing Array (InPTA) experiment using the upgraded wideband GMRT : 2020 Second Update 6. Project Code : 39_013 7. Operator(s) : Nilesh, Pramod, Shriram 8. Command File : /odisk/gtac/cmd/bcj/39_013_03jan20.cmd 9. LTA File : /gwbifrdata1/03jan/39_013_band5_03jan2021_gwb.lta, /gwbifrdata2/03jan/39_013_band3_03jan2021_gwb.lta 10. LogFlag File : /odisk/online1/logflags/39_013.FLAGS 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 : 4.0265 Sec 31. No of Antennas Working(Fringing) at the beginning :28 32. Name of Non-Working Antennas (with reason for each) : C03 : Mechanical Work. E02 : Taken for painting 33. Note for Backup : 34. Start and End Time of Obs.(IST): 03 Jan 2021 08:00:00 - 03 Jan 2021 16:00:00 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 : 8 GPU_ACQ_BW : 200.0000 GPU_FINAL_BW : 200.0000 GPU_EDGE_FRQ : 0 GPU_CHAN_MAX : 1024 GPU_CHAN_NUM : 0:1023:1 GPU_STOKES : Total_Intensity GPU_SIDEBAND : 1 1 GPU_RF3 : 500 500 GPU_DDCLO3 : 0.0000 0.0000 GPU_SB3 : 1 1 GCODE3 : 39_013B GPU_RF4 : 1460 1460 GPU_DDCLO4 : 0.0000 0.0000 GPU_SB4 : 1 1 GCODE4 : 39_013A GPU_CNTRL : ONLINE GPU_FSTOP : ON GPU_BEAM_1 : PA GPU_BEAM_2 : Voltage GPU_BEAM_3 : OFF GPU_BEAM_4 : OFF GPU_BM_INT : 8 GPU_GAINEQ : ON GPU_TPA : From GWB GUI. GPU_BITS : 8 Bits GPU_FILRFI : RFI Filterring OFF GPU_BEAM_S : OFF GPU_PFB : OFF GPU_PFB_TAPS : 16 GPU_BEAM_BIT : 16 GPU_VLT_BIT : 8 GPU_ENV : RELEASED -------------------------------- Split antennas as follows. # sub 3 # Band 3 # Beam 2 = Voltaege #C01 C02 C06 C08 C09 C11 C12 C14 ante 8 6 5 20 24 4 9 2 10 cp 0;defs 3;subar 3 # sub 4 # Band 5 # Beam 1 = PA # C00 C03 C04 C05 C10 C13 W01 W02 W03 W04 W05 W06 E02 E03 E04 E05 E06 S01 S02 S03 S04 S06 ante 22 7 1 3 19 12 11 8 13 14 15 16 25 17 18 21 22 23 26 27 28 29 30 cp 0;defs 4;subar 4 # GWB GAC configuration is as follows : # BEAM-1:130 :: C00 C04 C05 C10 C13 E03 E04 S01 S02 S03 S04 W01 W02 W03 W04 Total=15 # BEAM-1:175 :: C00 C04 C05 C10 C13 E03 E04 S01 S02 S03 S04 W01 W02 W03 W04 Total=15 # BEAM-2:130 :: C01 C02 C06 C08 C09 C11 C12 C14 Total=8 # BEAM-2:175 :: C01 C02 C06 C08 C09 C11 C12 C14 Total=8 -------------------------------------------------------------------------- NOTE : From 07:00 to 09:40 : Because of Network issue, correlator was taking more time than usual.Hence delay for observation. 07:00 to 08:15 : Pointing done. 08:15 : Started set up. 08:56 : Phasing and power equalized done on 3C286. 09:03 : Started scan on 3C286 for ~ 9.84262 min. 09:15 : Started scan on 3C286OFF for ~ 6.6214 min. 09:30 : Phasing done on 1822-096. 09:40 : Started command file. \'/odisk/gtac/cmd/bcj/39_013_03jan20.cmd\' 16:02 : Stopped command file and observing session over.