GTAC Observation Log

1. Date : 11/01/2019
2. Observation Sr. No. : 10799
3. Observer : Yogesh Maan, Bhal Chandra Joshi, Manjari Bagchi, Mayuresh Surnis, P. K. Manoharan

4. Observer's Email : ymaan4@gmail.com,bcj@ncra.tifr.res.in,manjari.bagchi@gmail.com,msurnis@gmail.com,mano.rac@gmail.com
5. Project Name :  Low-frequency monitoring of the magnetar XTE J1810-197\r\n
6. Project Code : DDTC044
7. Operator(s) : Nilesh
8. Command File : /odisk/gtac/cmd/ddtc044/obs.cmd
9. LTA File : /gwbifrdata2/11jan/ddtc044_band4_11jan2019_gwb.lta.2, /gwbifrdata2/11jan/ddtc044_band4_11jan2019_gwb.lta.1, /gwbifrdata2/11jan/ddtc044_band4_11jan2019_gwb.lta, /gwbifrdata2/11jan/ddtc044B_band3_11jan2019_gwb.lta.2, /gwbifrdata2/11jan/ddtc044B_band3_11jan2019_gwb.lta.1, /gwbifrdata2/11jan/ddtc044B_band3_11jan2019_gwb.lta
10. LogFlag File : /odisk/online1/logflags/DDTC044B.FLAGS.2, /odisk/online1/logflags/DDTC044B.FLAGS.1, /odisk/online1/logflags/DDTC044B.FLAGS, /odisk/online1/logflags/DDTC044A.FLAGS.3, /odisk/online1/logflags/DDTC044A.FLAGS.2, /odisk/online1/logflags/DDTC044A.FLAGS.1, /odisk/online1/logflags/DDTC044.FLAGS

ANTENNA SETTINGS :

11. RF Band(MHz) & Solar Attn(dB)- RF1 : 591 MHz ,RF2 : 591 MHz, SA1 : 0 dB, SA2 : 0 dB
12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 540 MHz, ILO2 : 540MHz , IVLO1 : 51 MHz, IVLO2 : 51 MHz 
13. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 4+14 dB, 32 MHz,ON, IF-CH2 : 4+14 dB, 32 MHz,ON

GSB SETTINGS :

14. GSB Host : gsbm1_shivneri
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 : 0 MHz; Step # 0
25. Maximum Channels : 256
26. Channel Numbers : 0:255:1
27. LO5 -1  : 149
28. LO5 -2  : 156

29. Frequency Parameters (TPA) : 591 591 540 540 51 51
30. Integration Time : 2.0132 Sec
31. No of Antennas Working(Fringing) at the beginning :27

32. Name of Non-Working Antennas (with reason for each) :
C01 : Maintenance.
C02 : Maintenance.
E05 : Maintenance.
33. Note for Backup :

34. Start and End Time of Obs.(IST): 11 Jan 2019 11:00:00 - 11 Jan 2019 13:10:00

35. ONLINE Machine : Lenyadri

36. No of Antennas Working(Fringing) at the end :27

37. Comments (During Observations) :
11:00 : Started settings.

------------GWB Setting---------
GPU_MODE  	: Realtime
GPU_LTA  	: 2
GPU_ACQ_BW  	: 200.0000
GPU_FINAL_BW  	: 200.0000
GPU_EDGE_FRQ  	: 0
GPU_CHAN_MAX  	: 4096
GPU_CHAN_NUM  	: 0:4095:1
GPU_STOKES  	: Total_Intensity
GPU_SIDEBAND  	: 1 1
GPU_RF3  	: 500  500
GPU_DDCLO3  	: 0.0000  0.0000
GPU_SB3  	: 1 1
GCODE3  	: DDTC44B
GPU_RF4  	: 550  550
GPU_DDCLO4  	: 0.0000  0.0000
GPU_SB4  	: -1 -1
GCODE4  	: DDTC44A
GPU_CNTRL  	: ONLINE
GPU_FSTOP  	: ON
GPU_BEAM_1  	: PA
GPU_BEAM_2  	: PA
GPU_BEAM_3  	: OFF
GPU_BEAM_4  	: OFF
GPU_BM_INT  	: 16
GPU_GAINEQ  	: OFF
GPU_TPA  	: From GWB GUI.
GPU_BITS  	: 8 Bits
GPU_FILRFI  	: RFI Filterring OFF
GPU_BEAM_S  	: OFF
--------------------------------

11:15 : CORRELATOR commands failing for one of the subarray, later investigated that it mostly fails for the one started later, irrespective of the subar/user/no.of antennas.

11:37 : Found that project code DDTC044A and DDTC044B are too long for correlator to accept commads, and was processing only DDTC044 for both subarrays. so reduced project code string to DDTC44A and DDTC44B.

11:39:27 : Started scan on 3C286 for ~ 0.313174 min.
11:42:13 : Started scan on 3C286 for ~ 1.45402 min.
11:43:56 : Started scan on 3C286 for ~ 3.15411 min.
11:50:22 : Started scan on 3C286 for ~ 2.46066 min.
11:58:40 : Started scan on 1822-096 for ~ 1.14085 min.
11:59:58 : Started scan on 1822-096 for ~ 1.23033 min.

12:03 : Wrong Pulsar source name.. could not found source. corrected after talk with Yogesh.

12:11:36 : Started scan on J1809-1943.
13:11 : Stopped scan and observation closed.