ASTROSAT CZTI

Data Quality Report

Orbit 50821

Creation date: 2025-02-19T13:50:14.396595
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/AS1C07_001T01_9000006450_50821cztM0_level2.fits modeM0/AS1C07_001T01_9000006450_50821cztM0_level2_quad_clean.evt
Size (bytes)1,647,826,560266,627,520
Size1.5 GB 254.3 MB
Events in quadrant A15,047,7001,711,466
Events in quadrant B9,598,0841,984,771
Events in quadrant C17,834,9651,487,061
Events in quadrant D16,961,7261,502,853

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04080
B04080
C04080
D04080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0582093
B0434613
C0672943
D0646663

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A2012014117.012922%
B201203411.694831%
C20121310215.416729%
D2012117598.742110%

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 21150 20123 978 978 4.62% 4.86%
B 21150 20123 65 65 0.31% 0.32%
C 21151 20124 2187 2187 10.34% 10.87%
D 21151 20124 1449 1449 6.85% 7.20%

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 13 2041993 3944.17 2097 2048 517.2
A 6 161 1539569 2972.75 2097 2048 517.2
A 14 254 879572 1696.67 2097 2048 517.2
B 5 185 135260 294.08 2137 2056 453.0
B 8 128 125893 273.4 2137 2056 453.0
B 7 252 105152 227.61 2137 2056 453.0
C 4 210 3419132 6392.01 1950 1933 534.6
C 15 147 1471238 2748.39 1950 1933 534.6
C 13 3 974691 1819.58 1950 1933 534.6
D 10 181 1007179 1799.37 1988 1922 558.7
D 15 154 956381 1708.44 1988 1922 558.7
D 2 249 927624 1656.97 1988 1922 558.7

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