ASTROSAT CZTI

Data Quality Report

Orbit 57754

Creation date: 2026-06-01T03:52:04.984042
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_083T16_9000006580_57754cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57754cztM0_level2_quad_clean.evt
Size (bytes)479,862,72094,916,160
Size457.6 MB 90.5 MB
Events in quadrant A2,968,396643,294
Events in quadrant B3,974,039666,326
Events in quadrant C6,411,512540,769
Events in quadrant D3,897,459564,393

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01342
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01384441
B01636771
C023721113
D01635835

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6584220.334143%
B65822153.266484%
C657983712.722298%
D65891642.488997%

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 7624 6598 1 1 0.01% 0.02%
B 7625 6597 99 99 1.30% 1.50%
C 7625 6592 703 703 9.22% 10.66%
D 7625 6597 152 152 1.99% 2.30%

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 12 83600 476.04 702 683 174.2
A 3 61 65959 374.76 702 683 174.2
A 7 160 42426 239.65 702 683 174.2
B 8 128 291016 1976.27 687 662 146.9
B 4 80 275239 1868.88 687 662 146.9
B 4 171 202869 1376.3 687 662 146.9
C 15 224 2311065 13127.65 640 637 176.0
C 9 38 1107782 6290.7 640 637 176.0
C 14 254 403933 2291.49 640 637 176.0
D 2 153 683466 3593.33 667 636 190.0
D 2 249 97224 508.29 667 636 190.0
D 3 12 95242 497.86 667 636 190.0

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