GTAC Observation Log 1. Date : 31/12/2010 2. Observation Sr. No. : 5171 3. Observer : ayesha 4. Observer's Email : ccappa@fcaglp.unlp.edu.ar,begum@astro.wisc.edu 5. Project Name : Makeup obs :High resolution imaging of the ring nebula around WR138a 6. Project Code : 19_030 7. Operator(s) : Deepak, Navanath, Rupsingh, 8. Command File : /odisk/gtac/cmd/ash/wr138.cmd 9. LTA File : /rawdata/31dec/19_030_31dec2010.lta, /rawdata1/31dec/19_030_31dec2010.ltb 10. GSB File : /gsbifrdata/31dec/19_030_31dec2010_gsb.lta 11. LogFlag File : /odisk/online1/logflags/19_030.FLAGS.1 ANTENNA SETTINGS : 12. RF Freq(MHz) & Solar Attn(dB)- RF1 : 1280 MHz ,RF2 : 1280 MHz, SA1 : 0 dB, SA2 : 0 dB 13. Ist LO (MHz) & IVth LO (MHz) : ILO1 : 1210 MHz, ILO2 : 1210 MHz, IVLO1 : 70 MHz, IVLO2 : 70 MHz 14. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 4+12 dB, 32 MHz,ON, IF-CH2 : 4+12 dB, 32 MHz,ON 15. BB BW(KHz) & BB ALC : 16000 KHz, ON CORRELATOR SETTINGS : GHB Settings : 16. GHB Channels : 0:127:1 17. Correlator Mode : IndianPolar 18. Frequency Parameters (TPA) : 1280 1280 1210 1210 70 70 GSB Settings : 19. Maximum Channels : 256 20. Final Bandwidth (MHz): OFF MHz; Step # 0 21. IFBW (MHz) : LO5 (KHz) : Custom :- 32 : 149000 - 156000 22. Stokes : Total_Intensity 23. Beam - 1 : OFF 24. Beam - 2 : OFF 25. Integration Time : 128 LTA ~ 16.908 Sec. 26. No of Antennas Working(Fringing) :28 27. Name of Non-Working Antennas (with reason for each) : C03 : Not frining in GHB. E04 : Low fringe. (phase satle but very low amplitude) S01-175 : low amplitude. 28. Note for Backup :-- 29. Start and End Time of Obs.(IST): 14:00 - 19:00 30. ONLINE Machine : Lenyadri 31. Comments (During Observations) : 14:00 : Started setup for 19_030 obs. 14:22 : Started scan on 3C48 for 10min. 14:38 : Started command file. 16:00 : C11 freq. ABC time out. 16:39 : C03 release for observation. 18:45 : Stopped command file. 18:49 : Started scan on 3C48. 19:00 : Stopped scan & observation over.