ASTROSAT CZTI

Data Quality Report

Orbit 57621

Creation date: 2026-05-23T07:50:14.895354
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_070T08_9000006576_57621cztM0_level2.fits modeM0/AS1A14_070T08_9000006576_57621cztM0_level2_quad_clean.evt
Size (bytes)440,893,44096,932,160
Size420.5 MB 92.4 MB
Events in quadrant A2,919,183645,137
Events in quadrant B3,249,909685,722
Events in quadrant C6,171,141560,812
Events in quadrant D3,456,042573,558

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0137462
B0145362
C0230022
D0151112

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0140
C0140
D0140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6741260.385699%
B67411001.483459%
C674172710.784750%
D6741761.127429%

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 7650 6741 1 1 0.01% 0.01%
B 7650 6741 30 30 0.39% 0.45%
C 7650 6741 648 648 8.47% 9.61%
D 7650 6741 75 75 0.98% 1.11%

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 14 62021 341.88 724 703 179.4
A 7 160 43341 237.73 724 703 179.4
A 3 137 8878 45.58 724 703 179.4
B 5 172 88208 570.24 717 689 153.5
B 10 247 77582 501.01 717 689 153.5
B 10 16 74532 481.13 717 689 153.5
C 15 224 2087021 11268.84 679 672 185.1
C 9 38 1130472 6102.3 679 672 185.1
C 10 22 132084 709.78 679 672 185.1
D 15 142 198334 1005.86 697 665 196.5
D 8 160 82387 415.85 697 665 196.5
D 3 224 81402 410.84 697 665 196.5

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