ASTROSAT CZTI

Data Quality Report

Orbit 20210122_C05_019T04_9000004130_level2

Creation date: 2025-12-20T00:39:54.582033
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/AS1C05_019T04_9000004130cztM0_level2.fits modeM0/AS1C05_019T04_9000004130cztM0_level2_quad_clean.evt
Size (bytes)585,803,520591,946,560
Size558.7 MB 564.5 MB
Events in quadrant A3,680,7883,678,428
Events in quadrant B3,505,3583,687,831
Events in quadrant C3,460,0543,438,518
Events in quadrant D2,991,0623,020,021

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012180
B012220
C012280
D012130

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01110
B01110
C01110
D01110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01231730
B01276360
C01580050
D01895910

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A598263900.651890%
B598059141.528300%
C5979622443.752759%
D5972845977.696558%

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 66551 57173 0 0 0.00% 0.00%
B 66551 57166 0 0 0.00% 0.00%
C 66551 57156 0 0 0.00% 0.00%
D 66551 57109 0 0 0.00% 0.00%

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 29 3615 11.57 960 907 234.1
A 7 110 2859 8.34 960 907 234.1
A 0 30 2844 8.27 960 907 234.1
B 2 9 2826 10.81 928 889 179.2
B 2 8 2319 7.98 928 889 179.2
B 5 128 2305 7.9 928 889 179.2
C 12 241 2472 6.93 916 864 231.9
C 3 187 2380 6.54 916 864 231.9
C 9 209 2362 6.46 916 864 231.9
D 15 46 2213 6.31 853 780 227.0
D 3 14 2192 6.22 853 780 227.0
D 6 67 2105 5.84 853 780 227.0

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