ASTROSAT CZTI

Data Quality Report

Orbit 20180823_T02_088T01_9000002320_level2

Creation date: 2025-11-24T04:44:41.580183
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/AS1T02_088T01_9000002320cztM0_level2.fits modeM0/AS1T02_088T01_9000002320cztM0_level2_quad_clean.evt
Size (bytes)712,128,960647,786,880
Size679.1 MB 617.8 MB
Events in quadrant A4,373,6803,825,195
Events in quadrant B4,203,1543,841,385
Events in quadrant C4,287,2723,667,968
Events in quadrant D3,677,7223,258,958

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01120
B01120
C01120
D01120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01517320
B01566040
C01536960
D01816010

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014960
B014960
C014960
D014960

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A732588761.195774%
B7325810771.470147%
C7325812771.743154%
D7325825023.415327%

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 84443 73258 0 0 0.00% 0.00%
B 84443 73254 0 0 0.00% 0.00%
C 84443 73253 0 0 0.00% 0.00%
D 84443 73195 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 4197 11.15 1137 1063 281.1
A 7 110 3512 8.71 1137 1063 281.1
A 9 19 3260 7.81 1137 1063 281.1
B 2 9 3484 11.03 1113 1063 219.6
B 2 8 2879 8.27 1113 1063 219.6
B 3 17 2746 7.67 1113 1063 219.6
C 1 80 3193 7.34 1132 1057 290.8
C 1 81 3145 7.18 1132 1057 290.8
C 12 241 2952 6.52 1132 1057 290.8
D 3 14 2768 6.46 1051 958 280.3
D 6 231 2604 5.87 1051 958 280.3
D 6 67 2575 5.77 1051 958 280.3

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