ASTROSAT CZTI

Data Quality Report

Orbit 55798

Creation date: 2026-01-20T15:43:36.813892
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_127T10_9000006542_55798cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55798cztM0_level2_quad_clean.evt
Size (bytes)675,910,080107,933,760
Size644.6 MB 102.9 MB
Events in quadrant A11,617,752543,947
Events in quadrant B3,692,763765,672
Events in quadrant C4,080,004723,198
Events in quadrant D4,994,188667,109

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0402131
B0176511
C0189061
D0211951

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01640
B01640
C01640
D01640

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8181240429.385161%
B81815166.307297%
C81803053.728606%
D81805566.797066%

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 8966 8180 1687 1687 18.82% 20.62%
B 8966 8182 12 12 0.13% 0.15%
C 8965 8181 110 110 1.23% 1.34%
D 8965 8181 235 235 2.62% 2.87%

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 7022173 37736.74 743 722 186.1
A 7 64 911491 4894.92 743 722 186.1
A 8 192 288341 1545.81 743 722 186.1
B 4 206 128877 690.6 853 819 185.4
B 5 172 87549 467.72 853 819 185.4
B 0 199 31155 163.6 853 819 185.4
C 13 3 564383 2434.6 848 842 231.5
C 12 252 68295 291.41 848 842 231.5
C 15 200 32815 138.13 848 842 231.5
D 11 129 1124119 4763.89 839 804 235.8
D 8 245 228625 966.17 839 804 235.8
D 7 70 93971 395.11 839 804 235.8

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