ASTROSAT CZTI

Data Quality Report

Orbit 56331

Creation date: 2026-02-25T10:56:01.642533
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_56331cztM0_level2.fits modeM0/AS1A14_049T01_9000006552_56331cztM0_level2_quad_clean.evt
Size (bytes)787,282,56077,921,280
Size750.8 MB 74.3 MB
Events in quadrant A4,383,114615,678
Events in quadrant B3,578,032685,152
Events in quadrant C4,971,088582,530
Events in quadrant D15,703,24021,106

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0200
C0200
D0200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0176472
B0151162
C0193002
D0511405

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A65233264.997700%
B65231812.774797%
C65234757.281925%
D6522635297.393438%

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 7633 6524 253 253 3.31% 3.88%
B 7633 6524 77 77 1.01% 1.18%
C 7633 6524 386 386 5.06% 5.92%
D 7631 6521 5343 5343 70.02% 81.94%

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 4 95 375263 2141.2 698 679 174.9
A 2 79 256879 1464.49 698 679 174.9
A 0 8 240922 1373.28 698 679 174.9
B 5 185 313310 2097.31 703 677 149.1
B 3 145 141709 946.12 703 677 149.1
B 9 251 55106 365.14 703 677 149.1
C 13 3 1795922 9708.7 677 672 184.9
C 12 252 261862 1412.51 677 672 184.9
C 12 249 78769 422.35 677 672 184.9
D 8 129 13017909 267302.24 164 154 48.7
D 12 3 1617050 33200.8 164 154 48.7
D 11 129 165199 3388.98 164 154 48.7

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