ASTROSAT CZTI

Data Quality Report

Orbit 20200611_A09_085T02_9000003716_level2

Creation date: 2025-12-12T18:51:36.455804
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_085T02_9000003716cztM0_level2.fits modeM0/AS1A09_085T02_9000003716cztM0_level2_quad_clean.evt
Size (bytes)2,047,593,6001,620,146,880
Size1.9 GB 1.5 GB
Events in quadrant A12,900,8649,375,660
Events in quadrant B12,258,5509,308,949
Events in quadrant C12,429,3048,827,240
Events in quadrant D10,676,5287,806,700

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03280
B03280
C03280
D03280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04372760
B04234390
C04429050
D05768380

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040880
B040880
C040880
D040880

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A20063320261.009804%
B20063324241.208176%
C20063345882.286762%
D200633135716.764092%

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 233418 200625 0 0 0.00% 0.00%
B 233418 200624 0 0 0.00% 0.00%
C 233418 200605 0 0 0.00% 0.00%
D 233418 199401 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 12380 11.32 3363 3162 814.3
A 7 110 10238 8.69 3363 3162 814.3
A 0 30 9636 7.95 3363 3162 814.3
B 2 9 9762 10.8 3231 3091 617.5
B 2 8 8084 8.09 3231 3091 617.5
B 5 128 7973 7.91 3231 3091 617.5
C 1 81 9542 7.89 3282 3083 818.8
C 1 80 9512 7.85 3282 3083 818.8
C 9 209 8325 6.4 3282 3083 818.8
D 10 189 7532 5.9 3049 2785 804.2
D 6 231 7495 5.86 3049 2785 804.2
D 3 14 7331 5.65 3049 2785 804.2

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