ASTROSAT CZTI

Data Quality Report

Orbit 20220118_A11_097T08_9000004874_level2

Creation date: 2025-12-31T10:44:07.125637
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_097T08_9000004874cztM0_level2.fits modeM0/AS1A11_097T08_9000004874cztM0_level2_quad_clean.evt
Size (bytes)789,753,600744,739,200
Size753.2 MB 710.2 MB
Events in quadrant A4,918,4024,465,741
Events in quadrant B4,657,5044,456,425
Events in quadrant C4,709,2814,236,031
Events in quadrant D3,966,0383,730,903

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03570
B03570
C03560
D03570

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01675730
B01928630
C02013590
D02539210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016880
B016900
C016880
D016880

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A82721970.117262%
B8266514931.806085%
C8269016562.002661%
D8250444355.375497%

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 123684 82111 0 0 0.00% 0.00%
B 123684 82078 0 0 0.00% 0.00%
C 123684 82078 0 0 0.00% 0.00%
D 123684 82048 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 4064 9.01 1282 1201 317.9
A 7 110 3883 8.44 1282 1201 317.9
A 0 29 3774 8.09 1282 1201 317.9
B 2 9 4023 11.67 1234 1179 243.7
B 3 80 3569 9.81 1234 1179 243.7
B 2 8 3306 8.73 1234 1179 243.7
C 1 81 3945 8.78 1245 1165 316.7
C 1 80 3770 8.22 1245 1165 316.7
C 3 202 3632 7.79 1245 1165 316.7
D 4 160 2992 6.5 1137 1040 300.3
D 10 113 2955 6.38 1137 1040 300.3
D 6 231 2893 6.17 1137 1040 300.3

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