ASTROSAT CZTI

Data Quality Report

Orbit 20200913_A09_145T01_9000003866_level2

Creation date: 2025-12-15T00:48:45.767435
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/AS1A09_145T01_9000003866cztM0_level2.fits modeM0/AS1A09_145T01_9000003866cztM0_level2_quad_clean.evt
Size (bytes)1,196,236,800978,246,720
Size1.1 GB 932.9 MB
Events in quadrant A7,566,2485,775,235
Events in quadrant B7,047,4805,612,546
Events in quadrant C7,386,6945,531,753
Events in quadrant D5,989,0884,478,480

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01870
B01870
C01870
D01870

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03108350
B03187290
C02542920
D04567820

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A024480
B024480
C024480
D024480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12003527082.256009%
B12003586337.192069%
C12003623321.942751%
D1200362034716.950748%

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 144310 120031 0 0 0.00% 0.00%
B 144310 119861 0 0 0.00% 0.00%
C 144310 120028 0 0 0.00% 0.00%
D 144310 119749 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 6213 9.05 1971 1853 481.8
A 7 110 6175 8.97 1971 1853 481.8
A 9 19 5643 7.87 1971 1853 481.8
B 2 9 5579 10.54 1861 1775 360.9
B 2 8 4692 8.08 1861 1775 360.9
B 5 128 4572 7.75 1861 1775 360.9
C 12 241 5109 6.68 1952 1828 491.4
C 3 126 5057 6.57 1952 1828 491.4
C 2 191 4916 6.28 1952 1828 491.4
D 4 246 4741 6.99 1706 1553 456.0
D 3 14 4287 5.99 1706 1553 456.0
D 1 19 4149 5.69 1706 1553 456.0

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