ASTROSAT CZTI

Data Quality Report

Orbit 56275

Creation date: 2026-02-23T09:37:32.561523
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_049T01_9000006552_56275cztM0_level2.fits modeM0/AS1A14_049T01_9000006552_56275cztM0_level2_quad_clean.evt
Size (bytes)844,816,32074,615,040
Size805.7 MB 71.2 MB
Events in quadrant A16,367,63530,212
Events in quadrant B3,483,259691,000
Events in quadrant C4,553,951591,407
Events in quadrant D6,366,271496,137

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0150
D0150

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0530102
B0146462
C0179772
D0231832

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6456623696.592317%
B64562313.578067%
C64564877.543371%
D6455115017.815647%

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 7595 6455 5928 5928 78.05% 91.84%
B 7596 6456 65 65 0.86% 1.01%
C 7596 6456 363 363 4.78% 5.62%
D 7595 6455 1075 1075 14.15% 16.65%

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 5145967 64880.84 311 303 79.3
A 15 32 5125927 64628.16 311 303 79.3
A 8 176 2408765 30367.9 311 303 79.3
B 5 185 222856 1463.36 715 688 151.8
B 0 63 149469 979.98 715 688 151.8
B 10 247 110153 721.01 715 688 151.8
C 13 3 607871 3242.46 687 679 187.3
C 5 250 543530 2898.88 687 679 187.3
C 12 254 300378 1600.42 687 679 187.3
D 5 32 1749919 9386.98 655 626 186.4
D 8 129 712096 3817.86 655 626 186.4
D 8 240 669394 3588.72 655 626 186.4

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