ASTROSAT CZTI

Data Quality Report

Orbit 55517

Creation date: 2026-01-02T11:36:24.069442
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_099T01_9000006536_55517cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55517cztM0_level2_quad_clean.evt
Size (bytes)375,845,76088,113,600
Size358.4 MB 84.0 MB
Events in quadrant A2,887,527587,185
Events in quadrant B4,275,637565,628
Events in quadrant C2,759,551561,969
Events in quadrant D3,512,218525,723

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0131851
B0174218
C0129331
D0148313

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A61261262.056807%
B612578712.848980%
C6127580.946630%
D61261272.073131%

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 7206 6127 46 46 0.64% 0.75%
B 7205 6126 566 566 7.86% 9.24%
C 7207 6128 12 12 0.17% 0.20%
D 7207 6128 65 65 0.90% 1.06%

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 8 255374 1570.42 656 639 162.2
A 0 31 33372 201.8 656 639 162.2
A 3 14 14235 83.82 656 639 162.2
B 5 172 1851235 14532.02 600 580 127.4
B 10 247 23908 183.18 600 580 127.4
B 12 111 15266 115.32 600 580 127.4
C 13 3 109594 629.38 632 625 173.1
C 9 38 43217 246.0 632 625 173.1
C 15 178 41980 238.86 632 625 173.1
D 7 70 429823 2424.59 629 598 177.0
D 10 181 151278 851.16 629 598 177.0
D 2 153 147391 829.2 629 598 177.0

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