GTAC Observation Log 1. Date : 08/05/2009 2. Observation Sr. No. : 4275 3. Observer : Jayaram N Chengalur 4. Observer's Email : chengalu@ncra.tifr.res.in 5. Project Name : Polarization of startburst galaxies 6. Project Code : 16_071 7. Operator(s) : Deepak, Jayprakash, Sachin, Shilpa 8. Command File : /odisk/gtac/cmd/sjoshi/pol_16_071_8may_01.cmd, /odisk/gtac/cmd/sjoshi/pol_16_071_8may_02.cmd 9. LTA File : /rawdata/8may/16_071_8may2009.lta, /rawdata1/8may/16_071_8may2009.ltb, /rawdata/8may/16_071_8may2009.lta.1, /rawdata1/8may/16_071_8may2009.ltb.1, /rawdata/8may/16_071_8may2009.lta.2, /rawdata1/8may/16_071_8may2009.ltb.2 10. LogFlag File : /odisk/online1/logflags/16_071.FLAGS ANTENNA SETTINGS : 11. RF Freq(MHz) & Solar Attn(dB)- RF1 : 610 MHz ,RF2 : 610 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz) : ILO1 : 540 MHz, ILO2 : 540 MHz, IVLO1 : 70 MHz, IVLO2 : 70 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 14. BB BW(KHz) & BB ALC : 16000 KHz, ON CORRELATOR SETTINGS : 16. Channels : 0:127:1 17. Frequency Parameters (TPA) : 610 610 540 540 70 70 18. Integration Time : 128 LTA ~ 16.908 Sec. 19. No of Antennas Working(Fringing) :26 20. Name of Non-Working Antennas (with reason for each) : C05 : No fringe. E04 : Servo problem. E06 : abc timeout. S04 : servo problem. 21. Note for Backup : -- 22. Start and End Time of Obs.(IST): 07:00 - 22:50 23. ONLINE Machine : Shivneri 24. Correlator Mode : UsbPolar 25. Comments (During Observations) : 07:03 : Started scan on 3C48 for 8mins. 07:24 : Started command file. /odisk/gtac/cmd/sjoshi/pol_16_071_8may_01.cmd 07:20 : C02 az. runflag absent. 07:30 : W01 painting. 07:37 : C02 started working. 09:55 : C02 taken for showing visitors. 10:05 : C02 released for observation. 10:10 : C05 taken for deflection test. 10:19 : Command file stopped. 10:26 : Started scan on 3C147 for 10mins. 11:00 : C13 - 175 stopped fringing. 11:22 : E04 started working. 12:05 : W05 painting. 12:20 : C05 offset modified. Still very very low cross amplitude, showing stable phase. 13:10 : Command file stopped., 13:18 : started scan on 3C147 for 15mins. 13:33 : Started command file /odisk/gtac/cmd/sjoshi/pol_16_071_8may_02.cmd 13:36 : C05 after RF swap started working. 13:45 : C12 no fringe. 15:21 : C13 started working. 16:18 : S04,W05 started working. 16:26 : Stopped command file. 16:27 : W06 abc timeout. 16:28 : Started scan on 3C147. 16:31 : W06 got abc reset. 16:37 : W06 started working. 16:42 : Stopped scan. 16:46 : Restarted command file. /odisk/gtac/cmd/sjoshi/pol_16_071_8may_02.cmd. 18:33 : W06 abc timeout. 18:35 : W06 got abc reset. 18:46 : W06 started working. 19:34 : E02 servo problem. 20:10 : oper2 machine hung. Stopped command file. Rebooted oper2 and restarted online. 20:47 : Restarted command file. /odisk/gtac/cmd/sjoshi/pol_16_071_8may_02.cmd. /rawdata/8may/16_071_8may2009.lta.1, /rawdata1/8may/16_071_8may2009.ltb.1. 21:15 : Online machine "Shivneri" automatically got off. Rebooted shivneri and restarted online. Stopped scan. 22:06 : Restarted command file. /odisk/gtac/cmd/sjoshi/pol_16_071_8may_02.cmd. /rawdata/8may/16_071_8may2009.lta.2, /rawdata1/8may/16_071_8may2009.ltb.2. 22:32 : Stopped command file. 22:37 : Started scan on 3C286. 22:50 : Stopped scan.