ASTROSAT CZTI

Data Quality Report

Orbit 20210813_A10_109T01_9000004638_level2

Creation date: 2025-12-28T08:51:40.751927
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/AS1A10_109T01_9000004638cztM0_level2.fits modeM0/AS1A10_109T01_9000004638cztM0_level2_quad_clean.evt
Size (bytes)180,132,480152,550,720
Size171.8 MB 145.5 MB
Events in quadrant A1,184,259935,943
Events in quadrant B1,035,564852,928
Events in quadrant C1,085,620866,889
Events in quadrant D985,865800,314

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0371130
B0603930
C0523590
D0468810

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0390
B0390
C0390
D0390

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03480
B03480
C03480
D03480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A168602371.405694%
B16851217012.877574%
C1684313928.264561%
D168577794.621226%

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 65073 14918 0 0 0.00% 0.00%
B 65072 14911 0 0 0.00% 0.00%
C 65072 14892 0 0 0.00% 0.00%
D 65072 14915 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 29 985 9.18 309 292 75.5
A 9 19 916 8.26 309 292 75.5
A 7 110 893 7.96 309 292 75.5
B 2 9 834 10.22 274 263 55.9
B 3 80 740 8.54 274 263 55.9
B 3 17 687 7.59 274 263 55.9
C 3 202 830 7.59 287 271 73.7
C 3 203 783 6.95 287 271 73.7
C 3 187 757 6.6 287 271 73.7
D 6 67 707 5.98 283 260 74.8
D 6 62 702 5.91 283 260 74.8
D 7 3 692 5.78 283 260 74.8

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