ASTROSAT CZTI

Data Quality Report

Orbit 55915

Creation date: 2026-01-30T20:55:50.470960
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_030T02_9000006544_55915cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55915cztM0_level2_quad_clean.evt
Size (bytes)543,052,800110,983,680
Size517.9 MB 105.8 MB
Events in quadrant A5,219,476703,122
Events in quadrant B3,677,795786,207
Events in quadrant C4,560,168688,558
Events in quadrant D6,030,749632,828

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01580
B01580
C01580
D01580

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B020
C020
D020

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0211841
B0168192
C0195941
D0233911

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A79083784.779970%
B7907951.201467%
C79072813.553813%
D79074415.577337%

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 7908 7908 360 360 4.55% 4.55%
B 7907 7907 13 13 0.16% 0.16%
C 7907 7907 203 203 2.57% 2.57%
D 7907 7907 400 400 5.06% 5.06%

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 1204820 5963.8 822 799 201.9
A 12 115 543723 2689.23 822 799 201.9
A 7 64 131515 647.47 822 799 201.9
B 7 0 167139 927.57 833 800 179.3
B 0 171 121682 674.09 833 800 179.3
B 0 199 24849 134.1 833 800 179.3
C 12 252 747703 3391.8 813 805 220.2
C 15 199 390844 1771.24 813 805 220.2
C 13 3 146898 663.44 813 805 220.2
D 11 129 1991857 8960.66 795 761 222.2
D 12 16 447148 2008.9 795 761 222.2
D 7 129 213619 957.94 795 761 222.2

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