ASTROSAT CZTI

Data Quality Report

Orbit 58246

Creation date: 2026-07-04T07:33:39.018693
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_044T03_9000006588_58246cztM0_level2.fits modeM0/AS1A14_044T03_9000006588_58246cztM0_level2_quad_clean.evt
Size (bytes)778,150,08086,417,280
Size742.1 MB 82.4 MB
Events in quadrant A3,269,929654,326
Events in quadrant B6,444,613640,066
Events in quadrant C3,541,230623,597
Events in quadrant D15,006,212211,115

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0140
C0140
D0140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0149252
B0239412
C0158132
D0493192

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6991570.815334%
B699175610.813904%
C69911592.274353%
D6991495570.876842%

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 7871 6992 18 18 0.23% 0.26%
B 7871 6992 507 507 6.44% 7.25%
C 7871 6992 117 117 1.49% 1.67%
D 7871 6992 4630 4630 58.82% 66.22%

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 3 14 156536 846.43 742 723 184.1
A 13 248 109456 590.68 742 723 184.1
A 7 207 32818 174.35 742 723 184.1
B 4 206 2173141 14020.44 717 691 154.9
B 2 249 889263 5734.62 717 691 154.9
B 0 171 199628 1283.89 717 691 154.9
C 6 223 221943 1114.69 720 715 198.5
C 7 2 149792 751.14 720 715 198.5
C 13 3 149127 747.79 720 715 198.5
D 12 110 11581363 72262.29 553 527 160.3
D 3 224 478584 2982.99 553 527 160.3
D 3 47 225477 1403.65 553 527 160.3

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