ASTROSAT CZTI

Data Quality Report

Orbit 56850

Creation date: 2026-04-01T10:19:41.702857
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/AS1A14_083T03_9000006562_56850cztM0_level2.fits modeM0/AS1A14_083T03_9000006562_56850cztM0_level2_quad_clean.evt
Size (bytes)1,129,440,960262,972,800
Size1.1 GB 250.8 MB
Events in quadrant A9,827,2231,712,212
Events in quadrant B9,849,9981,812,919
Events in quadrant C8,616,7591,640,266
Events in quadrant D12,053,6431,497,818

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03860
B03860
C03860
D03860

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0434384
B0430274
C0400064
D0494324

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A188434792.542058%
B188446423.406920%
C188441800.955211%
D188449174.866270%

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 20518 18847 305 305 1.49% 1.62%
B 20519 18848 317 317 1.54% 1.68%
C 20519 18848 78 78 0.38% 0.41%
D 20519 18848 717 717 3.49% 3.80%

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 64 902261 1834.49 1993 1942 490.8
A 12 3 344490 697.97 1993 1942 490.8
A 3 62 341186 691.24 1993 1942 490.8
B 10 16 930460 2213.52 1953 1877 419.5
B 5 185 444395 1054.86 1953 1877 419.5
B 10 32 166460 392.33 1953 1877 419.5
C 13 3 308808 573.4 1955 1935 535.2
C 14 254 182767 337.89 1955 1935 535.2
C 12 252 135104 248.83 1955 1935 535.2
D 8 240 2171783 4084.7 1899 1816 531.2
D 2 249 1343518 2525.59 1899 1816 531.2
D 0 160 214036 399.48 1899 1816 531.2

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