ASTROSAT CZTI

Data Quality Report

Orbit 20200917_A09_038T10_9000003876_level2

Creation date: 2025-12-15T02:53:55.448581
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/AS1A09_038T10_9000003876cztM0_level2.fits modeM0/AS1A09_038T10_9000003876cztM0_level2_quad_clean.evt
Size (bytes)68,388,48075,147,840
Size65.2 MB 71.7 MB
Events in quadrant A409,390460,786
Events in quadrant B397,274465,559
Events in quadrant C410,166447,616
Events in quadrant D350,986397,881

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0185270
B0167900
C0147380
D0201240

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A72401211.671271%
B72401161.602210%
C7240690.953039%
D72403274.516575%

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 7875 7241 0 0 0.00% 0.00%
B 7875 7239 0 0 0.00% 0.00%
C 7875 7240 0 0 0.00% 0.00%
D 7875 7237 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 29 331 8.23 106 100 28.1
A 0 30 303 7.24 106 100 28.1
A 7 110 303 7.24 106 100 28.1
B 2 9 344 10.63 104 100 23.0
B 2 8 281 7.89 104 100 23.0
B 3 17 270 7.41 104 100 23.0
C 9 209 309 7.1 108 101 29.3
C 12 241 300 6.79 108 101 29.3
C 2 191 284 6.25 108 101 29.3
D 12 6 262 6.05 100 91 28.3
D 7 3 252 5.69 100 91 28.3
D 10 113 250 5.62 100 91 28.3

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