ASTROSAT CZTI

Data Quality Report

Orbit 51781

Creation date: 2025-04-25T05:14:50.971545
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_090T01_9000006464_51781cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51781cztM0_level2_quad_clean.evt
Size (bytes)657,760,320101,194,560
Size627.3 MB 96.5 MB
Events in quadrant A5,036,773682,032
Events in quadrant B5,655,646717,558
Events in quadrant C4,418,891646,453
Events in quadrant D8,675,379512,568

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0198882
B0217252
C0181412
D0308352

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7253911.254653%
B72544335.969120%
C72542213.046595%
D7254155621.450234%

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 8933 7255 52 52 0.58% 0.72%
B 8934 7256 252 252 2.82% 3.47%
C 8934 7256 163 163 1.82% 2.25%
D 8933 7254 1421 1421 15.91% 19.59%

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 12 3 914123 4774.67 779 760 191.3
A 3 14 148069 770.07 779 760 191.3
A 2 143 130542 678.44 779 760 191.3
B 4 206 1116075 6746.38 767 741 165.3
B 4 174 447907 2704.8 767 741 165.3
B 10 44 276174 1666.03 767 741 165.3
C 9 38 210401 1015.94 758 753 206.4
C 15 218 191340 923.57 758 753 206.4
C 14 245 165631 798.99 758 753 206.4
D 11 129 4483307 23389.9 684 659 191.6
D 3 12 1096967 5720.4 684 659 191.6
D 8 176 103788 538.11 684 659 191.6

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