ASTROSAT CZTI

Data Quality Report

Orbit 55987

Creation date: 2026-02-06T10:30:53.508740
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_066T02_9000006546_55987cztM0_level2.fits modeM0/AS1A14_066T02_9000006546_55987cztM0_level2_quad_clean.evt
Size (bytes)468,164,160114,552,000
Size446.5 MB 109.2 MB
Events in quadrant A4,303,746732,546
Events in quadrant B4,182,000789,946
Events in quadrant C3,965,581714,936
Events in quadrant D4,256,090674,927

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0183382
B0179452
C0178562
D0185272

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01640
B01640
C01640
D01640

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A80032583.223791%
B80042282.848576%
C80041261.574213%
D80041391.736632%

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 9238 8006 100 100 1.08% 1.25%
B 9239 8006 45 45 0.49% 0.56%
C 9239 8007 86 86 0.93% 1.07%
D 9239 8007 73 73 0.79% 0.91%

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 7 64 532907 2468.89 868 846 215.5
A 4 249 93856 431.59 868 846 215.5
A 3 14 79079 363.02 868 846 215.5
B 2 249 286345 1528.8 868 833 186.8
B 0 229 106844 567.65 868 833 186.8
B 0 171 92621 491.49 868 833 186.8
C 15 230 344577 1468.73 857 849 234.0
C 1 16 58782 247.54 857 849 234.0
C 6 223 46430 194.77 857 849 234.0
D 11 129 326675 1340.24 851 812 243.1
D 7 129 121936 498.17 851 812 243.1
D 3 12 83473 339.98 851 812 243.1

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