ASTROSAT CZTI

Data Quality Report

Orbit 20171120_A04_198T01_9000001708_level2

Creation date: 2018-06-30T15:20:06.464982
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A04_198T01_9000001708cztM0_level2_bc.evt modeM0/AS1A04_198T01_9000001708cztM0_level2_quad_clean.evt
Size (bytes)3,669,955,200983,589,120
Size3.4 GB 938.0 MB
Events in quadrant A35,649,5586,056,341
Events in quadrant B22,574,1766,314,790
Events in quadrant C15,875,2106,262,375
Events in quadrant D31,556,4835,629,978

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016420
B016420
C016420
D016420

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01200
B01200
C01200
D01200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02560430
B01918480
C01654780
D02466320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A80571820010.177359%
B8057127203.375904%
C805716370.790607%
D80571990512.293505%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 92533 80575 808 808 0.87% 1.00%
B 92533 80574 15 15 0.02% 0.02%
C 92533 80573 1 1 0.00% 0.00%
D 92533 80548 361 361 0.39% 0.45%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 8 5 18941416 21980.94 3932 3854 861.5
A 1 162 840997 971.68 3932 3854 861.5
A 13 251 212489 242.16 3932 3854 861.5
B 4 239 4708733 6068.44 4104 3995 775.3
B 3 64 613836 786.61 4104 3995 775.3
B 11 51 563885 722.18 4104 3995 775.3
C 8 128 27157 26.2 4039 3983 884.5
C 14 234 26813 25.81 4039 3983 884.5
C 13 61 24101 22.75 4039 3983 884.5
D 13 122 5718954 6439.57 3774 3632 887.5
D 13 152 4556934 5130.3 3774 3632 887.5
D 1 52 1984742 2232.16 3774 3632 887.5

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter