ASTROSAT CZTI

Data Quality Report

Orbit 56021

Creation date: 2026-02-07T00:30:29.142107
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_066T02_9000006546_56021cztM0_level2.fits modeM0/AS1A14_066T02_9000006546_56021cztM0_level2_quad_clean.evt
Size (bytes)1,219,798,080263,214,720
Size1.1 GB 251.0 MB
Events in quadrant A11,166,2861,669,494
Events in quadrant B9,595,7191,825,023
Events in quadrant C9,933,0481,632,591
Events in quadrant D12,973,1931,521,894

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0472863
B0425532
C0440912
D0521292

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03880
B03880
C03880
D03880

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1915911115.798841%
B191606863.580376%
C191607473.898747%
D1916010465.459290%

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 20059 19161 617 617 3.08% 3.22%
B 20060 19162 113 113 0.56% 0.59%
C 20060 19162 357 357 1.78% 1.86%
D 20060 19162 803 803 4.00% 4.19%

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 0 8 2604162 5227.14 2041 1989 497.8
A 15 32 345328 689.68 2041 1989 497.8
A 12 115 100761 198.41 2041 1989 497.8
B 5 185 428242 964.84 2048 1968 441.8
B 4 171 385206 867.43 2048 1968 441.8
B 10 247 235818 529.3 2048 1968 441.8
C 15 199 1050326 1931.32 1997 1982 542.8
C 12 252 469048 860.45 1997 1982 542.8
C 14 80 271754 496.99 1997 1982 542.8
D 11 129 2434261 4355.14 1984 1896 558.5
D 8 129 1093671 1954.82 1984 1896 558.5
D 6 239 384736 685.47 1984 1896 558.5

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