ASTROSAT CZTI

Data Quality Report

Orbit 56255

Creation date: 2026-02-20T11:04:57.634360
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_049T01_9000006552_56255cztM0_level2.fits modeM0/AS1A14_049T01_9000006552_56255cztM0_level2_quad_clean.evt
Size (bytes)2,351,862,720289,287,360
Size2.2 GB 275.9 MB
Events in quadrant A42,515,532911,493
Events in quadrant B12,884,7522,307,650
Events in quadrant C14,068,3462,022,789
Events in quadrant D15,759,6411,883,085

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04840
B04840
C04840
D04840

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01428435
B0553616
C0591475
D0640165

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A237171093246.093519%
B237165422.285377%
C237178223.465868%
D237179864.157355%

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 26276 23912 9390 9390 35.74% 39.27%
B 26275 24005 224 224 0.85% 0.93%
C 26276 24002 587 587 2.23% 2.45%
D 26276 24006 939 939 3.57% 3.91%

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 15 32 16727823 33754.22 1989 1941 495.5
A 8 176 10733302 21656.78 1989 1941 495.5
A 4 95 1635919 3297.5 1989 1941 495.5
B 5 185 963676 1843.1 2470 2379 521.6
B 4 171 450262 858.73 2470 2379 521.6
B 10 247 390364 743.89 2470 2379 521.6
C 12 254 1776064 2715.31 2398 2377 653.2
C 6 223 635554 969.32 2398 2377 653.2
C 12 252 592747 903.79 2398 2377 653.2
D 8 129 3203120 4712.11 2388 2278 679.3
D 2 249 1475856 2169.32 2388 2278 679.3
D 15 115 651548 955.82 2388 2278 679.3

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