ASTROSAT CZTI

Data Quality Report

Orbit 50885

Creation date: 2025-02-23T19:43:24.962837
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/AS1C07_001T01_9000006450_50885cztM0_level2.fits modeM0/AS1C07_001T01_9000006450_50885cztM0_level2_quad_clean.evt
Size (bytes)556,200,00096,356,160
Size530.4 MB 91.9 MB
Events in quadrant A5,283,832637,097
Events in quadrant B3,873,808701,872
Events in quadrant C4,803,635612,322
Events in quadrant D6,116,298506,720

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0201601
B0159651
C0186241
D0225881

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A65874406.679824%
B65882854.326047%
C65883565.403764%
D6588106316.135398%

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 7692 6588 254 254 3.30% 3.86%
B 7693 6589 100 100 1.30% 1.52%
C 7693 6589 244 244 3.17% 3.70%
D 7693 6589 693 693 9.01% 10.52%

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 7 206 658888 3680.42 721 705 178.8
A 4 4 647077 3614.38 721 705 178.8
A 4 249 298252 1663.82 721 705 178.8
B 10 247 403392 2678.94 716 693 150.3
B 4 206 150921 999.39 716 693 150.3
B 8 128 100965 667.06 716 693 150.3
C 13 3 867705 4593.79 697 692 188.7
C 5 10 443842 2347.99 697 692 188.7
C 12 247 234633 1239.51 697 692 188.7
D 7 45 1407275 7719.27 650 627 182.2
D 11 245 662667 3633.08 650 627 182.2
D 2 249 430166 2357.18 650 627 182.2

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