ASTROSAT CZTI

Data Quality Report

Orbit 20201103_T03_259T01_9000003972_level2

Creation date: 2025-12-17T05:50:30.832448
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/AS1T03_259T01_9000003972cztM0_level2.fits modeM0/AS1T03_259T01_9000003972cztM0_level2_quad_clean.evt
Size (bytes)329,126,400276,675,840
Size313.9 MB 263.9 MB
Events in quadrant A2,082,6901,608,205
Events in quadrant B2,001,6981,615,556
Events in quadrant C2,037,2821,533,127
Events in quadrant D1,510,6281,289,048

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0400
B0400
C0400
D0400

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06920
B06920
C06920
D06920

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0705840
B0741960
C0713020
D01282910

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A339306671.965812%
B339309152.696729%
C339308632.543472%
D33930694620.471559%

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 38084 33927 0 0 0.00% 0.00%
B 38085 33928 0 0 0.00% 0.00%
C 38085 33928 0 0 0.00% 0.00%
D 38085 33121 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 2016 11.32 542 510 133.0
A 7 110 1657 8.62 542 510 133.0
A 0 30 1553 7.84 542 510 133.0
B 2 9 1532 9.85 529 506 104.2
B 5 128 1329 7.9 529 506 104.2
B 3 17 1321 7.82 529 506 104.2
C 9 209 1425 6.76 539 507 135.7
C 12 241 1424 6.76 539 507 135.7
C 3 126 1412 6.67 539 507 135.7
D 7 3 1098 6.16 430 392 114.7
D 6 38 1078 5.98 430 392 114.7
D 6 67 1071 5.92 430 392 114.7

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