GTAC Observation Log 1. Date : 26/02/2019 2. Observation Sr. No. : 10920 3. Observer : Maryam Arabsalmani, Sambit Roychowdhury, Nissim Kanekar 4. Observer's Email : maryam.arabsalmani@cea.fr, sambit.roychowdhury@manchester.ac.uk, nkanekar@ncra.tifr.res.in 5. Project Name : The structure of atomic gas in the host galaxy of AT2018cow, the nearest relativistic explosion since 1998 6. Project Code : 35_114 7. Operator(s) : Deepak, Pramod, Sachin, Shilpa 8. Command File : /odisk/gtac/cmd/nissim/cgcg137.cmd 9. LTA File : /gsbifrdata/26feb/35_114_26feb2019_gsb.lta 10. LogFlag File : /odisk/online1/logflags/35_114.FLAGS.1 ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 1407 MHz ,RF2 : 1407 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 1470 MHz, ILO2 : 1470MHz , IVLO1 : 63 MHz, IVLO2 : 63 MHz 13. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 4+14 dB, 16 MHz,ON, IF-CH2 : 4+14 dB, 16 MHz,ON GSB SETTINGS : 14. GSB Host : gsbm1_lenyadri 15. GSB Mode : Realtime 16. GSB LTA : 8 17. GSB CTRL : ONLINE 18. GSB Fstop : ON 19. GAIN EQ : OFF 20. Stokes : Total_Intensity 21. Beam - 1 : OFF 22. Beam - 2 : OFF 23. ACQ BW : 16.666666 MHz 24. Final BW : 4 MHz; Step # 1 25. Maximum Channels : 512 26. Channel Numbers : 0:511:1 27. LO5 -1 : 137 28. LO5 -2 : 168 29. Frequency Parameters (TPA) : 1407 1407 1470 1470 63 63 30. Integration Time : 16.1061 Sec 31. No of Antennas Working(Fringing) at the beginning :28 32. Name of Non-Working Antennas (with reason for each) : C02 and C03 :Feed jammed 33. Note for Backup : 34. Start and End Time of Obs.(IST): 26 Feb 2019 03:00:00 - 26 Feb 2019 09:03:00 35. ONLINE Machine : Lenyadri 36. No of Antennas Working(Fringing) at the end :28 37. Comments (During Observations) : 03:00 : Started set up. 03:20 : Started command file. '/odisk/gtac/cmd/nissim/cgcg137.cmd' 08:46 : Stopped command file. 08:48 : Started scan on 3C286. 09:03 : Stopped scan and observing session over.