GTAC Observation Log 1. Date : 28/3/2013 2. Observation Sr. No. : 6444 3. Observer : Dharam Vir Lal 4. Observer's Email : dharam@ncra.tifr.res.in,tventuri@ira.inaf.it 5. Project Name : Abell 2142's cold fronts and giant radio halo: a case of extremes 6. Project Code : 23_017 7. Operator(s) : Nilesh, Sachin, Shilpa, Surender 8. Command File : /odisk/gtac/cmd/dharam/23_017_28mar13.cmd 9. LTA File : /gsbifrdata/28mar/23_017_28mar2013.lta, /gsbifrdata/29mar/23_017_29mar2013.lta 10. LogFlag File : /odisk/online1/logflags/23_017.FLAGS.2, /odisk/online1/logflags/23_017.FLAGS.3 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 : 255 MHz , IVLO1 : 51 MHz, IVLO2 : 51 MHz 13. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 4+12 dB, 32 MHz,ON, IF-CH2 : 4+12 dB, 32 MHz,ON GSB SETTINGS : 14. GSB Mode : RealTime 15. GSB LTA : 8 16. GAIN EQ : ON 17. Stokes : Total_Intensity 18. Beam - 1 : OFF 19. Beam - 2 : OFF 20. ACQ BW : 32 MHz 21. Maximum Channels : 256 22. IFBW (MHz) : LO5 (KHz) : 32:149000-156000 23. Final Bandwidth (MHz): OFF MHz; Step # 0 24. Frequency Parameters (TPA) : 306 306 255 255 51 51. 25. Integration Time : 8.053 Sec. 26. No of Antennas Working(Fringing) :29 27. Name of Non-Working Antennas (with reason for each) : W02 : BLDC work. 28. Note for Backup :-- 29. Start and End Time of Obs.(IST): 22:00 - 09:10 30. ONLINE Machine : Lenyadri 31. Comments (During Observations) : 22:00 : Started set-up. 23:04 : Started scan on 3C147. 23:19 : Stopped scan. 23:22 : Started command file. 01:34 : C00, C01, C02 ,C03 - 175 pol not fringing. 02:04 : Stopped command file. 02:07 : Started scan on 3C286. 02:17 : Stopped scan. Due to GSB problem, halted GSB. 02:21 : Restarted GSB. 02:22 : Started scan on 3C286. 02:28 : Stopped scan. 02:32 : Restarted command file. 05:13 : Stopped command file. 05:17 : Started scan on 3C286. 05:27 : Stopped scan. 05:29 : Restarted command file. 08:43 : Stopped command file, and started scan on phase cal for ~4min. 08:53 : Started scan on 3c48 for ~15min. 09:03 : C06 and C09 taken for painting. 09:10 : Stopped scan and observation session over.