ASTROSAT CZTI

Data Quality Report

Orbit 56511

Creation date: 2026-03-09T13:31:46.686271
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_060T01_9000006556_56511cztM0_level2.fits modeM0/AS1A14_060T01_9000006556_56511cztM0_level2_quad_clean.evt
Size (bytes)528,563,520112,720,320
Size504.1 MB 107.5 MB
Events in quadrant A4,344,895734,536
Events in quadrant B5,740,817766,290
Events in quadrant C4,143,442705,538
Events in quadrant D4,721,876656,513

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0183111
B0224561
C0180231
D0195501

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B020
C020
D020

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01580
B01600
C01600
D01600

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A79141151.453121%
B79145607.076068%
C79141852.337630%
D79141822.299722%

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 7914 7914 64 64 0.81% 0.81%
B 7914 7914 265 265 3.35% 3.35%
C 7914 7914 111 111 1.40% 1.40%
D 7914 7914 154 154 1.95% 1.95%

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 4 249 240806 1117.2 870 847 214.8
A 7 64 177770 823.72 870 847 214.8
A 3 14 162214 751.29 870 847 214.8
B 4 206 1019132 5552.74 853 821 183.4
B 0 213 438759 2388.03 853 821 183.4
B 3 145 317369 1726.1 853 821 183.4
C 6 223 458856 1980.94 851 842 231.2
C 12 252 127758 548.92 851 842 231.2
C 13 3 96842 415.2 851 842 231.2
D 11 129 412524 1741.85 839 802 236.4
D 11 176 352631 1488.47 839 802 236.4
D 2 249 196805 829.22 839 802 236.4

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