ASTROSAT CZTI

Data Quality Report

Orbit 56540

Creation date: 2026-03-11T12:29:22.310962
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_060T01_9000006556_56540cztM0_level2.fits modeM0/AS1A14_060T01_9000006556_56540cztM0_level2_quad_clean.evt
Size (bytes)595,992,960118,961,280
Size568.4 MB 113.5 MB
Events in quadrant A5,176,841778,151
Events in quadrant B7,158,983766,627
Events in quadrant C4,388,552759,474
Events in quadrant D4,673,214703,934

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0215171
B0271141
C0194231
D0199851

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B040
C040
D040

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01740
B01740
C01740
D01740

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A85503764.397661%
B8550127114.865497%
C85512693.145831%
D85512753.215998%

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 8915 8552 179 179 2.01% 2.09%
B 8915 8552 587 587 6.58% 6.86%
C 8916 8553 93 93 1.04% 1.09%
D 8916 8553 98 98 1.10% 1.15%

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 4 95 466008 1942.18 970 944 239.5
A 4 249 347415 1446.92 970 944 239.5
A 13 153 332831 1386.01 970 944 239.5
B 5 185 2030324 10186.8 922 886 199.2
B 4 206 1015929 5095.02 922 886 199.2
B 8 128 89483 444.71 922 886 199.2
C 13 3 268035 1026.09 955 946 260.3
C 14 254 203398 777.77 955 946 260.3
C 6 223 47553 179.05 955 946 260.3
D 8 129 312031 1174.17 944 900 265.0
D 3 12 175565 659.16 944 900 265.0
D 2 31 140940 528.49 944 900 265.0

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