GTAC Observation Log 1. Date : 04/10/2015 2. Observation Sr. No. : 8109 3. Observer : George Heald, Peter Kamphuis, Gyula I.G. Józsa, Paolo Serra, p a Duc, Gianfranco Gentile, Tom Oosterloo, Eva Juette, Maria Patterson, David A Thilker, Erwin deBlok 4. Observer's Email : heald@astron.nl, peter.kamphuis@csiro.au, jozsa@astron.nl, serra@astron.nl, paduc@cea.fr, gianfranco.gentile@ugent.be, oosterloo@astron.nl, eva.juette@astro.rub.de, mtpatter@nmsu.edu, dthilker@pha.jhu.edu, blok@astron.nl 5. Project Name : %latex%What is the dark \\textsc{H\\,i} companion to NGC 4274? 6. Project Code : 25_061 7. Operator(s) : Deepak, Nilesh, Pramod, Surender 8. Command File : /odisk/gtac/cmd/chengalu/hi1220.cmd 9. LTA File : /gsbifrdata1/04oct/25_061_04oct2015.lta 10. LogFlag File : /odisk/online1/logflags/25_061.FLAGS.7 ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 1405 MHz ,RF2 : 1405 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 1345 MHz, ILO2 : 1345MHz , IVLO1 : 60 MHz, IVLO2 : 60 MHz 13. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 4+14 dB, 16 MHz,ON, IF-CH2 : 4+14 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 : 16.666666 MHz 24. Final BW : 4 MHz; Step # 8 25. Maximum Channels : 512 26. Channel Numbers : 0:511:1 27. LO5 -1 : 140 28. LO5 -2 : 165 29. Frequency Parameters (TPA) : 1405 1405 1345 1345 60 60 30. Integration Time : 16.1061 Sec 31. No of Antennas Working(Fringing) at the beginning :29 32. Name of Non-Working Antennas (with reason for each) : W04 : BLDC installation. 33. Note for Backup : 34. Start and End Time of Obs.(IST): 04 Oct 2015 06:00:00 - 04 Oct 2015 18:00:00 35. ONLINE Machine : Shivneri 36. No of Antennas Working(Fringing) at the end :29 37. Comments (During Observations) : 06:00 : Started settings. IF-BW 16 MHz BB-BW 4 MHz LTA2 4 (8 sec) Nchan 512 CMDFILE /odisk/gtac/cmd/chengalu/hi1220.cmd RF band= 1390 (1330 - 1450) LO1= 1345 (lower) IFBW= 18 GSB [ACQ] BW= 16.6666 Total Channel= 512 Line/Center Frequency= 1415.69 CH#[0]= 1413.3332 CH#[512]= 1417.4998 BW= +4.1666 CW= 8.14 (KHz.) Digital SubBand/step#= 2 is USEABLE ### GSB_CONFIG LO5= 140 165 LTA_FILE L05= 131.6668 173.3332 BASE_BAND LO4= 60 60 tpa 1405 1405 1345 1345 60 60 06:07 : Started scan on 3c147 for ~ 33 min. 06:41 : Sources risen in the sky, started command file. '/odisk/gtac/cmd/chengalu/hi1220.cmd'. 09:37 : C00 released for maintenance. 11:32 : C05 servo problem. 15:46 : C05 released for observation 16:34 : Power glitch. 16:34 : C08 abc time-out. 17:03 : C08 started working. 17:34 : Stopped command file. 17:36 : Started scan on 3C286. 17:42 : C00 released for observation. 18:00 : Stopped scan and observing session is over.