ASTROSAT CZTI

Data Quality Report

Orbit 53139

Creation date: 2025-07-28T18:41:04.859552
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/AS1A13_003T01_9000006486_53139cztM0_level2.fits modeM0/AS1A13_003T01_9000006486_53139cztM0_level2_quad_clean.evt
Size (bytes)868,561,92075,916,800
Size828.3 MB 72.4 MB
Events in quadrant A17,192,0771,976
Events in quadrant B3,947,248676,397
Events in quadrant C6,138,926567,924
Events in quadrant D4,345,049578,069

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B060
C060
D060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0556021
B0168411
C0230621
D0179161

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6803678799.764810%
B68032323.410260%
C680374710.980450%
D68032794.101132%

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 7397 6802 6662 6662 90.06% 97.94%
B 7398 6804 97 97 1.31% 1.43%
C 7398 6804 680 680 9.19% 9.99%
D 7398 6804 210 210 2.84% 3.09%

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 9 191 16107974 325772.64 189 184 49.4
A 0 8 212149 4286.89 189 184 49.4
A 7 206 64263 1295.97 189 184 49.4
B 2 249 431228 2943.71 688 664 146.3
B 10 254 419997 2866.92 688 664 146.3
B 4 81 119807 814.56 688 664 146.3
C 15 224 1648394 9167.54 647 640 179.7
C 0 240 944114 5249.17 647 640 179.7
C 9 38 369492 2052.17 647 640 179.7
D 8 176 424105 2238.58 667 639 189.2
D 6 42 220125 1160.27 667 639 189.2
D 1 0 201612 1062.41 667 639 189.2

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