ASTROSAT CZTI

Data Quality Report

Orbit 56494

Creation date: 2026-03-08T10:06:06.370722
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_56494cztM0_level2.fits modeM0/AS1A14_060T01_9000006556_56494cztM0_level2_quad_clean.evt
Size (bytes)428,074,56098,527,680
Size408.2 MB 94.0 MB
Events in quadrant A3,742,188637,308
Events in quadrant B3,337,192701,677
Events in quadrant C3,720,715612,956
Events in quadrant D4,521,093561,162

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0158982
B0145482
C0160022
D0180772

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0210
B0210
C0210
D0210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67421832.714328%
B67431021.512680%
C67432293.396114%
D67433344.953285%

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 8897 6744 122 122 1.37% 1.81%
B 8898 6745 21 21 0.24% 0.31%
C 8898 6744 144 144 1.62% 2.14%
D 8898 6745 279 279 3.14% 4.14%

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 3 230883 1251.24 746 725 183.9
A 4 95 224928 1218.86 746 725 183.9
A 3 45 103811 560.42 746 725 183.9
B 10 246 60129 368.81 748 720 161.1
B 0 213 57121 350.14 748 720 161.1
B 4 206 52950 324.25 748 720 161.1
C 13 3 601913 3029.78 729 723 198.4
C 6 223 128878 645.85 729 723 198.4
C 12 252 46960 233.02 729 723 198.4
D 2 249 699267 3482.67 717 685 200.6
D 11 176 469146 2335.44 717 685 200.6
D 3 12 174259 865.33 717 685 200.6

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