ASTROSAT CZTI

Data Quality Report

Orbit 55140

Creation date: 2025-12-07T08:07:21.898323
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_022T16_9000006532_55140cztM0_level2.fits modeM0/AS1A14_022T16_9000006532_55140cztM0_level2_quad_clean.evt
Size (bytes)451,356,48093,496,320
Size430.4 MB 89.2 MB
Events in quadrant A3,857,704616,447
Events in quadrant B2,949,720683,425
Events in quadrant C2,995,502598,422
Events in quadrant D6,405,592484,631

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160523
B0136202
C0138042
D0236412

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A64202103.271028%
B6421691.074599%
C6422590.918717%
D6422100915.711616%

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 8671 6423 176 176 2.03% 2.74%
B 8671 6423 12 12 0.14% 0.19%
C 8672 6424 33 33 0.38% 0.51%
D 8672 6423 953 953 10.99% 14.84%

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 1055333 6189.79 679 663 170.4
A 0 8 74936 435.9 679 663 170.4
A 12 17 39903 230.3 679 663 170.4
B 5 185 97434 656.47 685 662 147.4
B 10 247 35573 236.83 685 662 147.4
B 4 81 33404 222.11 685 662 147.4
C 13 3 91433 487.56 670 666 186.2
C 6 223 48611 257.54 670 666 186.2
C 14 254 43389 229.49 670 666 186.2
D 11 129 3283456 19167.61 607 579 171.3
D 11 176 451252 2631.33 607 579 171.3
D 7 129 53939 311.55 607 579 171.3

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