ASTROSAT CZTI

Data Quality Report

Orbit 52951

Creation date: 2025-07-17T09:47:41.744427
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/AS1A13_003T01_9000006486_52951cztM0_level2.fits modeM0/AS1A13_003T01_9000006486_52951cztM0_level2_quad_clean.evt
Size (bytes)1,299,499,20063,092,160
Size1.2 GB 60.2 MB
Events in quadrant A18,158,341151
Events in quadrant B3,976,690722,813
Events in quadrant C15,620,991210,388
Events in quadrant D9,787,721470,782

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020
B020
C020
D020

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0586652
B0168252
C0513752
D0340625

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7258725799.986222%
B72583915.387159%
C7259544374.982780%
D7258207128.534031%

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 7452 7257 7122 7122 95.57% 98.14%
B 7453 7260 93 93 1.25% 1.28%
C 7453 7258 4629 4629 62.11% 63.78%
D 7453 7259 1775 1775 23.82% 24.45%

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 9 191 16802181 369888.01 172 167 45.4
A 4 249 403754 8884.77 172 167 45.4
A 4 238 111897 2459.68 172 167 45.4
B 10 63 431426 2544.46 794 768 169.3
B 10 254 63782 372.31 794 768 169.3
B 0 171 50615 294.51 794 768 169.3
C 10 171 10859436 68085.07 590 587 159.5
C 12 254 1098443 6883.57 590 587 159.5
C 15 224 202057 1263.22 590 587 159.5
D 3 224 3284935 16556.74 696 665 198.4
D 15 78 923581 4652.63 696 665 198.4
D 8 176 837343 4217.88 696 665 198.4

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