ASTROSAT CZTI

Data Quality Report

Orbit 56815

Creation date: 2026-03-30T00:42:33.315670
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_56815cztM0_level2.fits modeM0/AS1A14_083T03_9000006562_56815cztM0_level2_quad_clean.evt
Size (bytes)528,960,96096,382,080
Size504.5 MB 91.9 MB
Events in quadrant A5,611,975636,070
Events in quadrant B5,115,393660,543
Events in quadrant C4,486,270579,642
Events in quadrant D3,840,550569,090

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0214131
B0199521
C0183521
D0164452

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67851171.724392%
B67863925.776599%
C67864186.159741%
D67851301.915991%

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 7300 6786 52 52 0.71% 0.77%
B 7301 6787 248 248 3.40% 3.65%
C 7301 6787 415 415 5.68% 6.11%
D 7300 6786 150 150 2.05% 2.21%

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 3 14 2526500 14324.74 710 691 176.3
A 10 251 259914 1470.14 710 691 176.3
A 12 147 20261 110.99 710 691 176.3
B 8 128 818421 5510.77 696 672 148.4
B 4 206 749831 5048.55 696 672 148.4
B 5 185 380622 2560.47 696 672 148.4
C 15 230 1374513 7406.82 673 665 185.5
C 13 3 144041 772.98 673 665 185.5
C 1 16 115144 617.19 673 665 185.5
D 2 249 802236 4132.07 684 652 194.0
D 2 31 182325 936.5 684 652 194.0
D 5 173 54975 280.03 684 652 194.0

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