ASTROSAT CZTI

Data Quality Report

Orbit 55681

Creation date: 2026-01-12T17:52:57.598557
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/AS1A14_099T04_9000006540_55681cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55681cztM0_level2_quad_clean.evt
Size (bytes)427,809,60088,404,480
Size408.0 MB 84.3 MB
Events in quadrant A5,219,591524,255
Events in quadrant B2,654,797626,123
Events in quadrant C2,938,946565,850
Events in quadrant D4,528,612517,014

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0201331
B0131024
C0136151
D0179751

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A635376211.994333%
B6351651.023461%
C6354240.377715%
D63542443.840101%

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 7073 6354 649 649 9.18% 10.21%
B 7073 6353 2 2 0.03% 0.03%
C 7074 6355 18 18 0.25% 0.28%
D 7074 6355 219 219 3.10% 3.45%

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 12 115 2198537 13999.54 629 614 157.0
A 7 64 211874 1345.61 629 614 157.0
A 0 8 136498 865.51 629 614 157.0
B 5 172 63884 455.37 643 620 138.9
B 12 111 16994 117.86 643 620 138.9
B 11 111 15916 110.1 643 620 138.9
C 9 38 228843 1307.26 633 627 174.6
C 12 252 60847 344.95 633 627 174.6
C 3 248 54661 309.52 633 627 174.6
D 11 129 1357501 7662.26 624 596 177.1
D 10 181 369970 2085.81 624 596 177.1
D 2 62 112279 630.66 624 596 177.1

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