ASTROSAT CZTI

Data Quality Report

Orbit 55725

Creation date: 2026-01-16T11:38:06.015026
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_55725cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55725cztM0_level2_quad_clean.evt
Size (bytes)860,906,88088,326,720
Size821.0 MB 84.2 MB
Events in quadrant A11,840,213404,448
Events in quadrant B3,280,441723,640
Events in quadrant C7,311,031559,344
Events in quadrant D8,878,222484,380

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0401371
B0151681
C0267461
D0314082

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B040
C040
D040

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7207331045.927570%
B72071401.942556%
C7208130618.118757%
D7207184725.627862%

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 7672 7208 2732 2732 35.61% 37.90%
B 7672 7209 6 6 0.08% 0.08%
C 7673 7210 1139 1139 14.84% 15.80%
D 7672 7207 1530 1530 19.94% 21.23%

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 5270189 35234.83 614 598 149.6
A 12 115 2901421 19396.19 614 598 149.6
A 4 249 776616 5188.8 614 598 149.6
B 4 206 190276 1165.47 758 731 162.6
B 0 199 54848 332.75 758 731 162.6
B 12 111 20317 120.43 758 731 162.6
C 15 199 3828678 20342.1 682 674 188.2
C 14 96 390094 2069.39 682 674 188.2
C 13 3 174359 922.97 682 674 188.2
D 11 129 5921170 31483.83 665 635 188.1
D 10 181 106427 562.57 665 635 188.1
D 7 129 88010 464.64 665 635 188.1

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