ASTROSAT CZTI

Data Quality Report

Orbit 20211025_A11_005T04_9000004742_level2

Creation date: 2025-12-29T16:23:40.301641
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/AS1A11_005T04_9000004742cztM0_level2.fits modeM0/AS1A11_005T04_9000004742cztM0_level2_quad_clean.evt
Size (bytes)977,690,880775,252,800
Size932.4 MB 739.3 MB
Events in quadrant A6,107,2564,451,793
Events in quadrant B5,734,2844,179,495
Events in quadrant C5,994,8934,320,489
Events in quadrant D4,799,3183,556,305

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04090
B04090
C04090
D04090

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02165610
B02625450
C02185400
D03689470

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020780
B020780
C020780
D020780

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1018344190.411454%
B10171262266.121205%
C1018307190.706079%
D10124495869.468215%

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 144877 102448 0 0 0.00% 0.00%
B 144877 102246 0 0 0.00% 0.00%
C 144877 102432 0 0 0.00% 0.00%
D 144877 101791 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 9 19 4888 8.74 1594 1503 387.4
A 0 29 4791 8.49 1594 1503 387.4
A 7 110 4752 8.39 1594 1503 387.4
B 2 9 4760 11.15 1521 1456 296.4
B 3 80 4420 10.0 1521 1456 296.4
B 5 128 4005 8.6 1521 1456 296.4
C 1 81 5012 8.79 1586 1499 399.5
C 1 80 4793 8.25 1586 1499 399.5
C 3 203 4770 8.19 1586 1499 399.5
D 10 113 3590 6.38 1377 1260 365.2
D 7 3 3541 6.25 1377 1260 365.2
D 10 189 3468 6.05 1377 1260 365.2

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