ASTROSAT CZTI

Data Quality Report

Orbit 57431

Creation date: 2026-05-10T12:21:54.266612
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_102T01_9000006572_57431cztM0_level2.fits modeM0/AS1A14_102T01_9000006572_57431cztM0_level2_quad_clean.evt
Size (bytes)1,304,377,920221,385,600
Size1.2 GB 211.1 MB
Events in quadrant A11,919,0761,412,256
Events in quadrant B9,279,5551,445,956
Events in quadrant C13,814,0281,289,964
Events in quadrant D11,779,2231,224,630

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0492234
B0415994
C0545524
D0487376

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03940
B03940
C03940
D03940

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A192776793.522332%
B192774682.427764%
C1927712856.665975%
D192768754.539324%

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 20776 19562 350 350 1.68% 1.79%
B 20776 19562 60 60 0.29% 0.31%
C 20776 19562 918 918 4.42% 4.69%
D 20775 19559 604 604 2.91% 3.09%

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 1864796 3724.2 2053 1994 500.2
A 7 64 1830512 3655.65 2053 1994 500.2
A 0 12 88682 173.31 2053 1994 500.2
B 0 213 292162 662.92 2048 1966 437.8
B 5 185 243437 551.61 2048 1966 437.8
B 0 216 150625 339.59 2048 1966 437.8
C 15 224 4502874 8484.82 1976 1956 530.5
C 14 254 680310 1278.79 1976 1956 530.5
C 13 3 381401 715.3 1976 1956 530.5
D 2 249 1154050 2094.73 1980 1891 550.0
D 8 240 847681 1537.72 1980 1891 550.0
D 15 142 556443 1008.23 1980 1891 550.0

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