ASTROSAT CZTI

Data Quality Report

Orbit 20180807_A04_203T01_9000002284_level2

Creation date: 2025-11-23T23:07:58.313451
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/AS1A04_203T01_9000002284cztM0_level2.fits modeM0/AS1A04_203T01_9000002284cztM0_level2_quad_clean.evt
Size (bytes)826,522,560714,320,640
Size788.2 MB 681.2 MB
Events in quadrant A5,127,6124,181,876
Events in quadrant B4,910,7984,186,157
Events in quadrant C4,998,3063,976,580
Events in quadrant D4,332,5543,625,957

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01774960
B01783780
C01812050
D02194660

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016780
B016780
C016780
D016780

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01520
B01520
C01520
D01520

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8259412011.454101%
B8259412191.475894%
C825949021.092089%
D8259436054.364724%

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 96439 82587 0 0 0.00% 0.00%
B 96439 82589 0 0 0.00% 0.00%
C 96440 82590 0 0 0.00% 0.00%
D 96439 82561 0 0 0.00% 0.00%

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 0 29 4948 11.38 1335 1253 324.6
A 7 110 4029 8.55 1335 1253 324.6
A 9 19 3879 8.09 1335 1253 324.6
B 2 9 3955 10.68 1296 1238 254.4
B 2 8 3394 8.48 1296 1238 254.4
B 5 225 3330 8.22 1296 1238 254.4
C 1 80 3735 7.34 1322 1234 340.7
C 1 81 3638 7.06 1322 1234 340.7
C 12 241 3421 6.42 1322 1234 340.7
D 6 231 3123 6.09 1238 1130 327.3
D 3 14 3109 6.05 1238 1130 327.3
D 10 189 3044 5.85 1238 1130 327.3

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