ASTROSAT CZTI

Data Quality Report

Orbit 58427

Creation date: 2026-07-16T11:11:38.670914
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_045T01_9000006590_58427cztM0_level2.fits modeM0/AS1A14_045T01_9000006590_58427cztM0_level2_quad_clean.evt
Size (bytes)382,305,600100,529,280
Size364.6 MB 95.9 MB
Events in quadrant A3,206,625654,501
Events in quadrant B3,513,030707,467
Events in quadrant C3,538,387627,019
Events in quadrant D3,374,599590,790

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0142892
B0149602
C0153292
D0148132

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0190
C0190
D0190

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66651151.725431%
B66651842.760690%
C66651542.310578%
D66651011.515379%

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 7715 6667 16 16 0.21% 0.24%
B 7715 6667 36 36 0.47% 0.54%
C 7715 6667 79 79 1.02% 1.18%
D 7715 6667 36 36 0.47% 0.54%

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 62 52051 267.04 769 750 192.1
A 7 64 47144 241.49 769 750 192.1
A 3 245 42081 215.14 769 750 192.1
B 6 255 174263 1073.79 759 733 161.6
B 2 249 51622 314.9 759 733 161.6
B 4 171 49095 299.26 759 733 161.6
C 12 252 434249 2146.22 736 732 202.0
C 6 9 43798 213.21 736 732 202.0
C 14 96 42131 204.95 736 732 202.0
D 8 240 243647 1153.62 739 707 210.6
D 2 252 71509 336.21 739 707 210.6
D 5 32 43960 205.39 739 707 210.6

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