ASTROSAT CZTI

Data Quality Report

Orbit 20210711_T04_024T01_9000004530_level2

Creation date: 2025-12-27T10:05:34.186392
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/AS1T04_024T01_9000004530cztM0_level2.fits modeM0/AS1T04_024T01_9000004530cztM0_level2_quad_clean.evt
Size (bytes)1,087,752,960752,699,520
Size1.0 GB 717.8 MB
Events in quadrant A6,984,8124,145,204
Events in quadrant B6,422,6104,045,407
Events in quadrant C6,454,4663,797,200
Events in quadrant D5,884,4343,607,617

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02203800
B03244120
C02542580
D02526700

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A021400
B021400
C021400
D021400

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01930
B01930
C01930
D01930

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10498711241.070609%
B10498727342.604132%
C10498749094.675817%
D10498719941.899283%

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 124332 104987 0 0 0.00% 0.00%
B 124332 104986 0 0 0.00% 0.00%
C 124332 104931 0 0 0.00% 0.00%
D 124332 104977 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 6833 11.64 1819 1716 439.7
A 7 110 5432 8.45 1819 1716 439.7
A 0 30 5336 8.23 1819 1716 439.7
B 2 9 5184 10.65 1702 1635 333.2
B 3 80 4315 8.04 1702 1635 333.2
B 2 8 4266 7.9 1702 1635 333.2
C 1 81 5017 7.96 1709 1610 428.2
C 1 80 4938 7.77 1709 1610 428.2
C 12 241 4573 6.92 1709 1610 428.2
D 6 231 4128 5.94 1681 1540 435.4
D 6 67 4122 5.93 1681 1540 435.4
D 10 189 4084 5.84 1681 1540 435.4

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