ASTROSAT CZTI

Data Quality Report

Orbit 20220515_A11_080T01_9000005146_level2

Creation date: 2026-01-02T18:05:36.456898
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_080T01_9000005146cztM0_level2.fits modeM0/AS1A11_080T01_9000005146cztM0_level2_quad_clean.evt
Size (bytes)816,370,560937,900,800
Size778.6 MB 894.5 MB
Events in quadrant A5,475,4587,182,452
Events in quadrant B3,193,0902,364,257
Events in quadrant C4,999,6006,346,858
Events in quadrant D4,590,3986,085,015

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03530
B03530
C03560
D03540

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019200
B019210
C019200
D019170

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02194210
B06150770
C02664870
D02443990

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9385125092.673387%
B935816786572.520063%
C9375483878.945752%
D9383027542.935095%

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 715511 94002 0 0 0.00% 0.00%
B 715511 93379 0 0 0.00% 0.00%
C 715511 93063 0 0 0.00% 0.00%
D 715512 93982 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 7 110 4771 9.68 1425 1343 354.0
A 0 29 4564 9.1 1425 1343 354.0
A 9 19 4528 9.0 1425 1343 354.0
B 2 9 2956 12.05 844 819 177.3
B 3 80 2602 10.06 844 819 177.3
B 2 8 2333 8.54 844 819 177.3
C 1 81 4567 9.76 1322 1244 340.3
C 1 80 4449 9.42 1322 1244 340.3
C 3 203 4300 8.98 1322 1244 340.3
D 4 160 3556 6.61 1315 1200 356.3
D 10 113 3478 6.39 1315 1200 356.3
D 6 38 3392 6.15 1315 1200 356.3

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