ASTROSAT CZTI

Data Quality Report

Orbit 20210625_A10_071T69_9000004488_level2

Creation date: 2025-12-27T06:59:26.399979
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/AS1A10_071T69_9000004488cztM0_level2.fits modeM0/AS1A10_071T69_9000004488cztM0_level2_quad_clean.evt
Size (bytes)117,550,08064,094,400
Size112.1 MB 61.1 MB
Events in quadrant A736,740296,739
Events in quadrant B691,040292,220
Events in quadrant C704,904277,236
Events in quadrant D597,472243,435

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02440
B02440
C02440
D02440

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0180
C0180
D0180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0247650
B0369500
C0258340
D0359740

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A11996560.466822%
B119962902.417472%
C119962652.209070%
D119968066.718906%

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 13825 11993 0 0 0.00% 0.00%
B 13826 11995 0 0 0.00% 0.00%
C 13825 11994 0 0 0.00% 0.00%
D 13825 11972 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 29 691 10.35 192 181 49.3
A 7 110 584 8.18 192 181 49.3
A 0 30 540 7.28 192 181 49.3
B 2 9 523 9.21 182 174 37.9
B 3 17 468 7.76 182 174 37.9
B 5 128 446 7.18 182 174 37.9
C 1 81 554 7.76 186 175 48.8
C 1 80 534 7.35 186 175 48.8
C 12 241 524 7.15 186 175 48.8
D 15 46 449 6.22 170 154 47.5
D 10 189 440 6.03 170 154 47.5
D 4 246 432 5.86 170 154 47.5

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