ASTROSAT CZTI

Data Quality Report

Orbit 57220

Creation date: 2026-04-30T00:07:20.748993
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_9000006568_57220cztM0_level2.fits modeM0/AS1A14_070T08_9000006568_57220cztM0_level2_quad_clean.evt
Size (bytes)469,267,20092,865,600
Size447.5 MB 88.6 MB
Events in quadrant A3,083,561633,767
Events in quadrant B3,482,716679,315
Events in quadrant C6,894,755494,323
Events in quadrant D3,408,161555,040

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0210
C0210
D0210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0138932
B0150002
C0249848
D0150272

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A64471061.644176%
B64471622.512797%
C6446131120.338194%
D64461532.373565%

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 7602 6448 80 80 1.05% 1.24%
B 7602 6448 79 79 1.04% 1.23%
C 7601 6446 994 994 13.08% 15.42%
D 7601 6447 127 127 1.67% 1.97%

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 0 128 299577 1771.57 686 670 168.7
A 3 95 81375 478.32 686 670 168.7
A 10 251 22681 130.46 686 670 168.7
B 10 16 296502 2041.51 679 654 144.9
B 5 185 167956 1154.47 679 654 144.9
B 4 201 70137 479.47 679 654 144.9
C 15 224 4161949 25317.21 597 590 164.4
C 12 254 178972 1085.25 597 590 164.4
C 14 254 166771 1011.03 597 590 164.4
D 8 240 313417 1671.76 652 622 187.1
D 9 102 179537 956.22 652 622 187.1
D 7 96 92891 493.14 652 622 187.1

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