ASTROSAT CZTI

Data Quality Report

Orbit 56031

Creation date: 2026-02-05T07:21:08.036086
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_56031cztM0_level2.fits modeM0/AS1A14_066T02_9000006546_56031cztM0_level2_quad_clean.evt
Size (bytes)809,622,720106,695,360
Size772.1 MB 101.8 MB
Events in quadrant A10,786,175562,793
Events in quadrant B4,010,525798,615
Events in quadrant C5,502,542704,655
Events in quadrant D9,042,315599,998

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0377362
B0178812
C0221792
D0326182

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01680
B01680
C01680
D01680

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8117242529.875570%
B81181932.377433%
C81183324.089677%
D8118113814.018231%

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 8912 8121 1886 1886 21.16% 23.22%
B 8913 8122 25 25 0.28% 0.31%
C 8913 8122 263 263 2.95% 3.24%
D 8913 8122 968 968 10.86% 11.92%

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 15 32 6587593 33714.45 785 763 195.4
A 12 115 527941 2698.34 785 763 195.4
A 7 64 490230 2505.32 785 763 195.4
B 10 247 147351 777.76 882 851 188.4
B 7 252 86040 452.26 882 851 188.4
B 4 171 65896 345.32 882 851 188.4
C 13 3 1921526 8138.79 858 850 236.0
C 12 252 95609 401.54 858 850 236.0
C 2 12 60036 250.8 858 850 236.0
D 11 129 3031416 13085.28 819 781 231.6
D 2 62 1509410 6513.76 819 781 231.6
D 8 160 457355 1971.34 819 781 231.6

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