GTAC Observation Log 1. Date : 03/12/2010 2. Observation Sr. No. : 5127 3. Observer : Aritra Basu, Subhashis Roy 4. Observer's Email : aritra@ncra.tifr.res.in,roy@ncra.tifr.res.in 5. Project Name : Low frequency observations of nearby spiral galaxies to study the equipartition magnetic field. 6. Project Code : 19_009 7. Operator(s) : Manisha, Nilesh, Rupsingh, Sachin, 8. Command File : /odisk/gtac/cmd/aritra/0540_1200_03dec.cmd, /odisk/gtac/cmd/aritra/1200_1300_03dec.cmd, /odisk/gtac/cmd/aritra/1300_1415_03dec.cmd, /odisk/gtac/cmd/aritra/1415_1600_03dec.cmd, /odisk/gtac/cmd/aritra/1300_1430_04dec.cmd, /odisk/gtac/cmd/aritra/1600_1940_04dec.cmd, /odisk/gtac/cmd/aritra/1940_0200_04dec.cmd 9. LTA File : /rawdata/3dec/19_009_03dec2010.lta, /rawdata/3dec/19_009_03dec2010.lta.1, /rawdata1/3dec/19_009_03dec2010.ltb, /rawdata1/3dec/19_009_03dec2010.ltb.1, /rawdata/3dec/19_009_03dec2010.lta.2, /rawdata1/3dec/19_009_03dec2010.ltb.2, /rawdata/3dec/19_009_03dec2010.lta.3, /rawdata1/3dec/19_009_03dec2010.ltb.3, /rawdata/3dec/19_009_03dec2010.lta.4, /rawdata1/3dec/19_009_03dec2010.ltb.4 10. GSB File : /gsbifrdata1/3dec/19_009_03dec2010_gsb_16s.lta, /gsbifrdata1/3dec/19_009_03dec2010_gsb_16s.lta.1, /gsbifrdata/3dec/19_009_03dec2010_gsb_4s.lta, /gsbifrdata/3dec/19_009_03dec2010_gsb_4s.lta.1, /gsbifrdata1/3dec/19_009_03dec2010_gsb_16s.lta.2, /gsbifrdata/3dec/19_009_03dec2010_gsb_4s.lta.2, /gsbifrdata/3dec/19_009_03dec2010_gsb_4s.lta.3, /gsbifrdata1/3dec/19_009_03dec2010_gsb.lta 11. LogFlag File : /odisk/online1/logflags/19_009.FLAGS.2, /odisk/online1/logflags/19_009.FLAGS.4, /odisk/online1/logflags/19_009.FLAGS.5 ANTENNA SETTINGS : 12. RF Freq(MHz) & Solar Attn(dB)- RF1 : 614 MHz ,RF2 : 244 MHz, SA1 : 0 dB, SA2 : 14 dB 13. Ist LO (MHz) & IVth LO (MHz) : ILO1 : 680 MHz, ILO2 : 310 MHz, IVLO1 : 66 MHz, IVLO2 : 66 MHz 14. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 20+10 dB, 32 MHz,OFF, IF-CH2 : 20+10 dB, 16 MHz,OFF 15. BB BW(KHz) & BB ALC : 16000 KHz, OFF CORRELATOR SETTINGS : GHB Settings : 16. GHB Channels : 128 17. Correlator Mode : IndianPolar 18. Frequency Parameters (TPA) : 614 244 680 310 66 66 GSB Settings : 19. Maximum Channels : 256 20. Final Bandwidth (MHz): OFF MHz; Step # 0 21. IFBW : LO5(MHz) : 32:149-156 MHz 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) : C01,C08 : Servo problem 28. Note for Backup :-- 29. Start and End Time of Obs.(IST): 05:20 - 00:00 30. ONLINE Machine : Lenyadri 31. Comments (During Observations) : 05:20 : Started setup. 05:30 : Started power eq on 3c286 @ 300 counts. 05:52 : Started scan on 3c286 for 6min. 06:04 : Started command file. '/odisk/gtac/cmd/aritra/0540_1200_03dec.cmd' 09:38 : C02 got ABC timed out. 10:13 : C02 started working. 12:23 : Stopped command file. 12:28 : Started command file /odisk/gtac/cmd/aritra/1200_1300_03dec.cmd. 13:00 : Source set, stopped command file. 13:00 : Started new command file /odisk/gtac/cmd/aritra/1300_1415_03dec.cmd. 14:02 : Source set, stopped command file. 14:07 : Started scan on 3C286 for 2 mins. 14:12 : Started scan on 3C286 for 2 mins. 14:15 : Stopped scan and changed track from outer to inner. 14:32 : Started new command file /odisk/gtac/cmd/aritra/1415_1600_03dec.cmd. 16:20 : Command file stopped. 16:24 : Started scan on 3C48 for 5mins. 16:29 : Started command file /odisk/gtac/cmd/aritra/1600_2030_03dec.cmd 18:30 : C00 and C03 released for observation. 20:30 : Command file stopped. 20:30 : Started command file /odisk/gtac/cmd/aritra/2030_0110_03dec.cmd 01:02 : Stopped command file. 01:05 : Started command /odisk/gtac/cmd/aritra/0110_0215_04dec.cmd 02:27 : Stopped command file. 02:35 : Started scan on 3C147. 02:56 : Stopped scan. 03:02 : Started command file /odisk/gtac/cmd/aritra/0300_0400_04dec.cmd. 04:05 : Stopped command file. 04:06 : Started command file. 07:57 : Power failed 07:57, stopped das &command file. 08:18 : restored settings and started command file. C04 : not releasing brakes in both axis. 09:00 : C03 parked for painting. 13:19 : Started new command file /odisk/gtac/cmd/aritra/1300_1430_04dec.cmd. 14:21 : Source set, stopped command file. 14:22 : Started scan on 3C286. 14:25 : Stopped scan on 3C286. new record files started. 16:13 : scan started on 348 for 10m 16:26 : new command file started. /odisk/gtac/cmd/aritra/1600_1940_04dec.cmd 19:25 : Central AC failed. Hardware corr. switched off. Observation is going on using GSB. 19:30 : Central AC started working. Hardware corr. switched ON. S01toS06 in LSB Hardware corr. not working. C00,C01,C03,C04 No fringe only in Hardware corr. W02,W05,W06 no fringe in LSB [hardware corr]. 19:43 : Command file stopped. 19:47 : Started scan on 3C48 for 7mins. 19:57 : Started command file /odisk/gtac/cmd/aritra/1940_0200_04dec.cmd 21:25 : scan # 7 bad scan= in hardware corr.[/rawdata/3dec/19_009_03dec2010.lta.4] 22:00 : W02,W05,W06 started fringing in LSB [hardware corr]. 01:57 : Stopped command file. 01:58 : Started scan 3C48. 02:06 : Stopped scan & observation over.