ASTROSAT CZTI

Data Quality Report

Orbit 56001

Creation date: 2026-02-06T16:50:18.380718
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_066T02_9000006546_56001cztM0_level2.fits modeM0/AS1A14_066T02_9000006546_56001cztM0_level2_quad_clean.evt
Size (bytes)681,099,84092,557,440
Size649.5 MB 88.3 MB
Events in quadrant A10,682,797443,493
Events in quadrant B3,675,384715,584
Events in quadrant C3,331,582636,431
Events in quadrant D6,961,885504,024

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0367121
B0160951
C0156891
D0258641

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460
B01460
C01460
D01460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7224263136.420266%
B7225901.245675%
C7224971.342746%
D7224125217.331118%

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 7904 7225 2655 2655 33.59% 36.75%
B 7905 7227 30 30 0.38% 0.42%
C 7904 7226 86 86 1.09% 1.19%
D 7904 7224 1255 1255 15.88% 17.37%

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 12 115 7832410 50260.29 630 613 155.8
A 3 14 151456 968.03 630 613 155.8
A 4 3 76739 488.54 630 613 155.8
B 0 173 219694 1343.31 755 725 163.0
B 5 185 150503 918.84 755 725 163.0
B 0 199 73980 449.4 755 725 163.0
C 12 254 286185 1404.55 739 732 203.2
C 12 249 38876 187.68 739 732 203.2
C 12 252 37999 183.37 739 732 203.2
D 2 120 1368972 7272.26 657 627 188.2
D 2 62 1351723 7180.58 657 627 188.2
D 8 240 404545 2146.68 657 627 188.2

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