ASTROSAT CZTI

Data Quality Report

Orbit 20200721_A09_033T02_9000003762_level2

Creation date: 2025-12-13T18:50:14.276064
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_033T02_9000003762cztM0_level2.fits modeM0/AS1A09_033T02_9000003762cztM0_level2_quad_clean.evt
Size (bytes)1,025,412,480733,763,520
Size977.9 MB 699.8 MB
Events in quadrant A6,497,0884,051,875
Events in quadrant B6,108,8484,035,236
Events in quadrant C6,189,2263,818,293
Events in quadrant D5,505,6723,559,436

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01730
B01730
C01730
D01730

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020100
B020100
C020100
D020100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02140040
B02154000
C02064370
D02404950

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9853115531.576154%
B9853118911.919193%
C9853017171.742616%
D9853127312.771717%

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 115710 98516 0 0 0.00% 0.00%
B 115710 98505 0 0 0.00% 0.00%
C 115710 98517 0 0 0.00% 0.00%
D 115710 98515 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 5572 9.77 1693 1599 406.8
A 7 110 5142 8.71 1693 1599 406.8
A 9 19 4862 8.02 1693 1599 406.8
B 2 9 4804 10.48 1616 1551 310.4
B 3 80 4035 8.0 1616 1551 310.4
B 2 8 4024 7.97 1616 1551 310.4
C 12 241 4310 6.75 1637 1539 410.7
C 3 126 4264 6.64 1637 1539 410.7
C 9 233 4228 6.55 1637 1539 410.7
D 3 14 4020 6.3 1573 1439 409.3
D 6 231 3925 6.07 1573 1439 409.3
D 10 189 3886 5.98 1573 1439 409.3

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