GTAC Observation Log 1. Date : 25/09/2015 2. Observation Sr. No. : 8088 3. Observer : Zhongsheng Yuan, Jinlin Han, Zhonglue Wen 4. Observer's Email : zsyuan@bao.ac.cn, hjl@nao.cas.cn, zhonglue@nao.cas.cn 5. Project Name : Confirmation and low-frequency measurements for probable radio halos in four rich galaxy clusters 6. Project Code : 28_084 7. Operator(s) : Rupsing 8. Command File : /odisk/gtac/cmd/28_084/25sep15/28_084s2.cmd 9. LTA File : /gsbifrdata/25sep/28_084_25sep2015.lta 10. LogFlag File : /odisk/online1/logflags/28_084.FLAGS ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 629 MHz ,RF2 : 253 MHz, SA1 : 0 dB, SA2 : 14 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 680 MHz, ILO2 : 304MHz , 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, 16 MHz,ON GSB SETTINGS : 14. GSB Host : gsbm1 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 : 33.333333 MHz; Step # 25. Maximum Channels : 256 26. Channel Numbers : 0:255:1 27. LO5 -1 : 149 28. LO5 -2 : 156 29. Frequency Parameters (TPA) : 629 253 680 304 51 51 30. Integration Time : 16.1061 Sec 31. No of Antennas Working(Fringing) at the beginning :26 32. Name of Non-Working Antennas (with reason for each) : C00 : Toouch-up painting. C10 : No feed @235MHz. E02 : No feed @235MHz. W04 : No fringe @235(175). 33. Note for Backup : 34. Start and End Time of Obs.(IST): 23 Sep 2015 23:30:00 - 25 Sep 2015 06:00:00 35. ONLINE Machine : Shivneri 36. No of Antennas Working(Fringing) at the end :26 37. Comments (During Observations) : 23:37 : Started scan on 3C48. 23:53 : Stopped scan. 23:58 : Started command file. --------------------------------------------------------------------------- 00:05 : Scintillation. ---------------------------------------------------------------------------- 05:06 : Stopped command file due to source set. 05:09 : Started scan on 3C48. 05:37 : Stopped scan and observation colsed.