GTAC Observation Log 1. Date : 21/02/2020 2. Observation Sr. No. : 11915 3. Observer : Neeraj Gupta, Jens-Kristian Krogager, Raghunathan Srianand, Pasquier Noterdaeme 4. Observer\'s Email : ngupta@iucaa.in, krogager@dark-cosmology.dk, anand@iucaa.in, noterdaeme@iap.fr 5. Project Name : %latex% Search for cold gas at $2 < z < 5.24$ in a dust-unbiased sample of quasars: follow-up of 21-cm absorption detection candidates 6. Project Code : 37_028 7. Operator(s) : Pramod, Sachin, Shriram, Surender 8. Command File : /odisk/gtac/cmd/37_028/obs_s3.cmd,, /odisk/gtac/cmd/37_028/obs_s4.cmd,, /odisk/gtac/cmd/37_028/obs_s5.cmd 9. LTA File : /gsbifrdata1/20feb/37_028_20feb2020_s3_gsb.lta, /gwbifrdata2/20feb/37_028_20feb2020_s3_gwb.lta, /gsbifrdata1/21feb/37_028_20feb2020_s5_gsb.lta, /gsbifrdata1/21feb/37_028_20feb2020_s4_gsb.lta, /gwbifrdata2/21feb/37_028_21feb2020_s5_gwb.lta, /gwbifrdata2/21feb/37_028_21feb2020_s4_gwb.lta 10. LogFlag File : /odisk/online1/logflags/37_028.FLAGS.2 ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 411 MHz ,RF2 : 411 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 349 MHz, ILO2 : 349MHz , IVLO1 : 62 MHz, IVLO2 : 62 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 : 16.666666 MHz 24. Final BW : 0 MHz; Step # 0 25. Maximum Channels : 512 26. Channel Numbers : 0:511:1 27. LO5 -1 : 138 28. LO5 -2 : 167 29. Frequency Parameters (TPA) : 411 411 349 349 62 62 30. Integration Time : 8.053 Sec 31. No of Antennas Working(Fringing) at the beginning :29 32. Name of Non-Working Antennas (with reason for each) : W06 : : Taken for ELEctrical work C13 : : RFI line at 325MHz. S03 : : RFI line at 325MHz. 33. Note for Backup : 34. Start and End Time of Obs.(IST): 20 Feb 2020 23:00:00 - 21 Feb 2020 08:00:00 35. ONLINE Machine : Shivneri 36. No of Antennas Working(Fringing) at the end :27 37. RFI Status : 38. Comments (During Observations) : 22:30:00 : Started set-up for S3. -------------------------------- RF Band = 350 MHz [From 390 to 500 (Band3 Sub Band )]. GABLO(MHz) = 350 DDCLO(MHz) = 66.275 SIDEBAND_FLAG = USB (-1) ACQ_BW(MHz) = 100 FINAL_BW(MHz) = 6.25 DDC = ON (1) DECIMATE = 16 TOTAL CHAN = 4096 CHAN WIDTH(KHz) = 1.52587890625 START_FREQ(MHz) = 416.275 (at Channel 1) LINE_FREQ(MHz) = 419.4 (at Channel = 2048) STOP_FREQ(MHz) = 422.525 (at Channel 4096 ----------------------------------------------------------------------- 22:37:54 : Started scan on 3C147 for ~ 14.4955 min. 22:56:06 : Started scan on 3C286 for ~ 11.8112 min. 23:11:18 : Started scan on 1150-003 for ~ 4.96605 min. 23:17:19 : Started scan on M1244-0446 for ~ 50.1974 min. 00:08:40 : Started scan on 1150-003 for ~ 4.83184 min. 00:14:39 : Started scan on M1244-0446 for ~ 50.0632 min. 01:05:49 : Started scan on 1150-003 for ~ 4.96605 min. 01:11:44 : Started scan on M1244-0446 for ~ 32.078 min. 01:44:27 : Started scan on 1150-003 for ~ 5.23449 min. 01:53:38 : Started scan on 3C286 for ~ 8.3215 min. 02:02:00 : Stopped scan. ------------------------------------------------ 02:00:00 : Started set-up for S4. ------------------------------------------------ RF Band = 325 MHz [From 320 to 400 (Band3 Sub Band )]. GABLO(MHz) = 400 DDCLO(MHz) = 44.675 SIDEBAND_FLAG = LSB (+1) ACQ_BW(MHz) = 100 FINAL_BW(MHz) = 6.25 DDC = ON (1) DECIMATE = 16 TOTAL CHAN = 4096 CHAN WIDTH(KHz) = 1.52587890625 START_FREQ(MHz) = 355.325 (at Channel 1) LINE_FREQ(MHz) = 352.2 (at Channel = 2048) STOP_FREQ(MHz) = 349.075 (at Channel 4096) ------------------------------------------------------- GSB line observation setup RF band= 325 (295 - 450) LO1= 282 (lower) IFBW= 18 GSB [ACQ] BW= 16.6666 Total Channel= 512 Line/Center Frequency= 352.2 CH#[0]= 344 CH#[512]= 360.6666 BW= +16.6666 CW= 32.55 (KHz.) Digital SubBand/step#= 0 GSB_CONFIG LO5= 138 167 LTA_FILE L05= 138 167 BASE_BAND LO4= 62 62 tpa 344 344 282 282 62 62 -------------------------------------------- 02:10:48 : Started scan on 3C286 for ~ 10.3348 min. 02:25:00 : Started command file. /odisk/gtac/cmd/37_028/obs_s4.cmd 04:49:00 : Stopped command file. 04:51:00 : Started scan on 3C286. 05:00:00 : Stopped scan. -------------------------------------------- 05:00:00 : Started set-up for S5. RF Band = 350 MHz [From 390 to 500 (Band3 Sub Band )]. GABLO(MHz) = 500 DDCLO(MHz) = 40.675 SIDEBAND_FLAG = LSB (+1) ACQ_BW(MHz) = 100 FINAL_BW(MHz) = 6.25 DDC = ON (1) DECIMATE = 16 TOTAL CHAN = 4096 CHAN WIDTH(KHz) = 1.52587890625 START_FREQ(MHz) = 459.325 (at Channel 1) LINE_FREQ(MHz) = 456.2 (at Channel = 2048) STOP_FREQ(MHz) = 453.075 (at Channel 4096) -------------------------------------------------- GSB line observation setup RF band= 325 (295 - 490) LO1= 525 (higher) IFBW= 18 GSB [ACQ] BW= 16.6666 Total Channel= 512 Line/Center Frequency= 456.2 CH#[0]= 463 CH#[512]= 446.3334 BW= -16.6666 CW= 32.55 (KHz.) Digital SubBand/step#= 0 GSB_CONFIG LO5= 138 167 LTA_FILE L05= 138 167 BASE_BAND LO4= 62 62 tpa 463 463 525 525 62 62 --------------------------------------------- 05:00:00 : Started set-up. 05:27:14 : Started scan on 3C286 for ~ 7.91884 min. 05:27:00 : C11 low self power to 175pol. 05:35:00 : Started command file. /odisk/gtac/cmd/37_028/obs_s5.cmd 07:47 : Stopped command file. 07:50 : Started scan on 3C286. 08:00 : Stopped scan and observation session is over.