ASTROSAT CZTI

Data Quality Report

Orbit 59146

Creation date: 2026-09-02T20:40:57.672887
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/AS1T05_264T01_9000006602_59146cztM0_level2.fits modeM0/AS1T05_264T01_9000006602_59146cztM0_level2_quad_clean.evt
Size (bytes)2,039,961,600241,479,360
Size1.9 GB 230.3 MB
Events in quadrant A9,610,7001,806,982
Events in quadrant B9,896,8931,990,794
Events in quadrant C9,948,6881,798,939
Events in quadrant D44,542,530368,026

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03960
B03960
C03960
D03960

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0423403
B0425363
C0433333
D01457033

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A195445292.706713%
B195445822.977896%
C195445252.686246%
D195441571180.387843%

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 20664 19546 82 82 0.40% 0.42%
B 20664 19545 45 45 0.22% 0.23%
C 20664 19547 171 171 0.83% 0.87%
D 20663 19543 14760 14760 71.43% 75.53%

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 10 251 443184 827.23 2207 2146 533.1
A 15 233 226013 419.9 2207 2146 533.1
A 7 243 221057 410.6 2207 2146 533.1
B 5 236 332196 706.02 2194 2108 467.5
B 4 236 292236 620.55 2194 2108 467.5
B 5 185 235266 498.7 2194 2108 467.5
C 12 252 394876 669.37 2164 2143 586.7
C 5 250 314533 532.43 2164 2143 586.7
C 14 254 264283 446.79 2164 2143 586.7
D 12 1 32952263 133387.43 855 815 247.0
D 12 110 6504983 26328.87 855 815 247.0
D 1 27 535433 2164.13 855 815 247.0

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

TCT plots

Parameter TCT0 TCT_healed
Tct