ASTROSAT CZTI

Data Quality Report

Orbit 20220806_A09_138T04_9000005282_level2

Creation date: 2026-01-04T01:58:55.170433
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_138T04_9000005282cztM0_level2.fits modeM0/AS1A09_138T04_9000005282cztM0_level2_quad_clean.evt
Size (bytes)2,194,761,6002,116,440,000
Size2.0 GB 2.0 GB
Events in quadrant A13,700,57212,897,913
Events in quadrant B12,659,02012,538,620
Events in quadrant C13,094,88612,023,205
Events in quadrant D11,246,25810,875,687

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A047080
B047080
C047080
D047080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04985150
B05585970
C04950200
D06415250

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08800
B08800
C08800
D08800

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A23011414480.629253%
B23011388293.836811%
C23011415430.670537%
D230114110454.799795%

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 316858 230001 0 0 0.00% 0.00%
B 316858 229298 0 0 0.00% 0.00%
C 316858 230075 0 0 0.00% 0.00%
D 316858 229800 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 9 19 11106 8.82 3579 3363 877.5
A 7 110 10863 8.55 3579 3363 877.5
A 0 29 10802 8.48 3579 3363 877.5
B 2 9 10844 11.74 3365 3223 649.2
B 3 80 9676 9.94 3365 3223 649.2
B 2 8 8926 8.78 3365 3223 649.2
C 1 81 10871 8.74 3462 3249 872.0
C 1 80 10559 8.38 3462 3249 872.0
C 3 203 10493 8.31 3462 3249 872.0
D 7 3 8172 6.07 3228 2946 860.3
D 4 160 8104 6.0 3228 2946 860.3
D 10 113 8090 5.98 3228 2946 860.3

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