ASTROSAT CZTI

Data Quality Report

Orbit 57387

Creation date: 2026-05-07T13:00:13.654449
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_102T01_9000006572_57387cztM0_level2.fits modeM0/AS1A14_102T01_9000006572_57387cztM0_level2_quad_clean.evt
Size (bytes)1,339,142,400197,553,600
Size1.2 GB 188.4 MB
Events in quadrant A8,071,5851,344,005
Events in quadrant B8,129,5281,321,007
Events in quadrant C20,180,6461,043,087
Events in quadrant D11,855,4541,083,940

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0369392
B0369921
C0719471
D0474251

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030
B030
C030
D030

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03460
B03460
C03460
D03460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A172281700.986766%
B172293662.124325%
C17229409823.785478%
D172299955.775147%

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 17836 17512 19 19 0.11% 0.11%
B 17837 17513 41 41 0.23% 0.23%
C 17837 17513 3203 3203 17.96% 18.29%
D 17837 17513 857 857 4.80% 4.89%

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 315318 685.5 1870 1818 457.3
A 0 12 231087 501.32 1870 1818 457.3
A 4 13 97353 208.9 1870 1818 457.3
B 5 185 229350 579.78 1844 1769 392.5
B 4 201 189789 479.0 1844 1769 392.5
B 0 245 111472 279.48 1844 1769 392.5
C 15 224 12572012 28739.59 1612 1601 437.4
C 14 254 413181 940.99 1612 1601 437.4
C 8 7 309087 703.0 1612 1601 437.4
D 8 240 2516250 5120.46 1768 1691 491.1
D 7 96 557330 1131.46 1768 1691 491.1
D 2 249 459450 932.15 1768 1691 491.1

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