ASTROSAT CZTI

Data Quality Report

Orbit 20161204_A02_191T02_9000000852_level2

Creation date: 2025-11-08T03:10:06.983562
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

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/AS1A02_191T02_9000000852cztM0_level2.fits modeM0/AS1A02_191T02_9000000852cztM0_level2_quad_clean.evt
Size (bytes)720,725,760768,015,360
Size687.3 MB 732.4 MB
Events in quadrant A4,316,3084,634,723
Events in quadrant B4,207,6904,747,245
Events in quadrant C4,247,0584,423,385
Events in quadrant D3,631,8664,031,161

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016160
B016160
C016160
D016160

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01616860
B01640500
C01609850
D01889950

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01180
B01180
C01180
D01180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A790996840.864739%
B790997870.994956%
C790994120.520866%
D7909914741.863488%

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 90803 79098 0 0 0.00% 0.00%
B 90803 79096 0 0 0.00% 0.00%
C 90803 79099 0 0 0.00% 0.00%
D 90803 79087 0 0 0.00% 0.00%

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 0 29 4258 11.22 1121 1049 285.9
A 7 110 3732 9.38 1121 1049 285.9
A 0 30 3275 7.79 1121 1049 285.9
B 2 9 3697 11.74 1109 1056 224.9
B 12 226 2911 8.25 1109 1056 224.9
B 14 254 2907 8.23 1109 1056 224.9
C 1 80 3173 7.16 1120 1031 299.4
C 1 81 3150 7.08 1120 1031 299.4
C 12 241 2973 6.49 1120 1031 299.4
D 3 14 2715 6.4 1034 939 277.3
D 1 19 2610 6.02 1034 939 277.3
D 11 82 2594 5.97 1034 939 277.3

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