ASTROSAT CZTI

Data Quality Report

Orbit 55578

Creation date: 2026-01-05T20:58:56.807705
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_021T06_9000006538_55578cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55578cztM0_level2_quad_clean.evt
Size (bytes)546,788,16085,553,280
Size521.5 MB 81.6 MB
Events in quadrant A5,800,234544,553
Events in quadrant B2,713,563642,902
Events in quadrant C7,009,624448,819
Events in quadrant D4,232,689519,183

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0215956
B0128162
C02531744
D0169972

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A623673911.850545%
B6237681.090268%
C6228144723.233783%
D62382473.959602%

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 7272 6239 715 715 9.83% 11.46%
B 7272 6239 0 0 0.00% 0.00%
C 7272 6235 1225 1225 16.85% 19.65%
D 7273 6240 166 166 2.28% 2.66%

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 15 32 2517242 15944.13 631 614 157.8
A 12 115 612258 3875.08 631 614 157.8
A 0 8 126434 797.13 631 614 157.8
B 7 0 61715 448.75 639 616 136.2
B 4 169 46124 334.24 639 616 136.2
B 10 247 19329 137.44 639 616 136.2
C 9 38 4393180 27958.31 565 557 157.1
C 6 223 124623 789.66 565 557 157.1
C 13 3 103771 656.94 565 557 157.1
D 11 129 1240461 7057.34 621 593 175.7
D 2 62 206208 1170.36 621 593 175.7
D 2 153 172006 975.68 621 593 175.7

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