ASTROSAT CZTI

Data Quality Report

Orbit 20200812_A09_088T01_9000003808_level2

Creation date: 2025-12-14T08:17:53.144935
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_088T01_9000003808cztM0_level2.fits modeM0/AS1A09_088T01_9000003808cztM0_level2_quad_clean.evt
Size (bytes)1,490,374,0801,472,644,800
Size1.4 GB 1.4 GB
Events in quadrant A9,578,0229,469,943
Events in quadrant B9,238,2749,640,738
Events in quadrant C8,507,0067,811,326
Events in quadrant D7,247,6927,136,897

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02630
B02630
C02630
D02630

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A031380
B031380
C031380
D031380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03299760
B03223110
C05549220
D06448890

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A15379823261.512373%
B15379819451.264646%
C1537982789618.138077%
D1537983448422.421618%

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 180258 153784 0 0 0.00% 0.00%
B 180258 153789 0 0 0.00% 0.00%
C 180258 153625 0 0 0.00% 0.00%
D 180258 153168 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 7827 8.92 2497 2351 613.6
A 7 110 7538 8.45 2497 2351 613.6
A 9 19 7274 8.02 2497 2351 613.6
B 2 9 7348 10.85 2441 2344 461.1
B 2 8 6105 8.16 2441 2344 461.1
B 5 128 6029 7.99 2441 2344 461.1
C 12 241 5998 6.85 2254 2122 566.1
C 9 209 5696 6.31 2254 2122 566.1
C 3 126 5640 6.21 2254 2122 566.1
D 3 14 5174 6.02 2066 1887 545.7
D 6 231 5162 6.0 2066 1887 545.7
D 15 46 5110 5.91 2066 1887 545.7

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