ASTROSAT CZTI

Data Quality Report

Orbit 20210608_A10_071T25_9000004450_level2

Creation date: 2025-12-26T17:13:08.208041
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_071T25_9000004450cztM0_level2.fits modeM0/AS1A10_071T25_9000004450cztM0_level2_quad_clean.evt
Size (bytes)708,482,880540,584,640
Size675.7 MB 515.5 MB
Events in quadrant A4,528,4883,141,000
Events in quadrant B4,207,6123,085,441
Events in quadrant C4,231,3342,854,523
Events in quadrant D3,673,2922,474,191

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01467430
B02157110
C01806280
D02447750

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014280
B014280
C014280
D014280

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01110
B01110
C01110
D01110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7019910261.461559%
B7019919882.831949%
C7019925953.696634%
D7019945976.548526%

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 81270 70187 0 0 0.00% 0.00%
B 81270 70184 0 0 0.00% 0.00%
C 81270 70180 0 0 0.00% 0.00%
D 81270 70185 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 4341 11.22 1178 1106 288.4
A 7 110 3506 8.32 1178 1106 288.4
A 0 30 3283 7.55 1178 1106 288.4
B 2 9 3342 10.35 1114 1065 220.0
B 3 80 2908 8.38 1114 1065 220.0
B 3 17 2823 7.99 1114 1065 220.0
C 1 81 3313 7.95 1118 1045 285.3
C 1 80 3301 7.91 1118 1045 285.3
C 12 241 2884 6.45 1118 1045 285.3
D 15 46 2689 6.28 1048 956 275.8
D 7 3 2599 5.96 1048 956 275.8
D 10 189 2589 5.92 1048 956 275.8

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