ASTROSAT CZTI

Data Quality Report

Orbit 20220419_A11_095T06_9000005078_level2

Creation date: 2026-01-02T10:45:22.315494
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/AS1A11_095T06_9000005078cztM0_level2.fits modeM0/AS1A11_095T06_9000005078cztM0_level2_quad_clean.evt
Size (bytes)524,845,440405,440,640
Size500.5 MB 386.7 MB
Events in quadrant A3,236,4702,260,531
Events in quadrant B3,066,1462,199,514
Events in quadrant C3,123,2602,122,138
Events in quadrant D2,719,1921,945,133

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02110
B02110
C02110
D02110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01166490
B01329250
C01268140
D01299720

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A011200
B011200
C011200
D011200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A546391870.342246%
B5463920753.797654%
C546399461.731364%
D5463910141.855817%

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 75911 54640 0 0 0.00% 0.00%
B 75911 54632 0 0 0.00% 0.00%
C 75911 54637 0 0 0.00% 0.00%
D 75911 54633 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 7 110 2706 9.1 843 793 210.2
A 9 19 2674 8.95 843 793 210.2
A 0 29 2617 8.68 843 793 210.2
B 2 9 2565 11.4 809 773 157.3
B 3 80 2312 9.79 809 773 157.3
B 5 255 2167 8.86 809 773 157.3
C 1 81 2517 8.25 825 774 211.3
C 3 203 2451 7.94 825 774 211.3
C 3 202 2433 7.85 825 774 211.3
D 6 67 1953 6.03 776 708 206.4
D 1 3 1923 5.89 776 708 206.4
D 7 3 1922 5.88 776 708 206.4

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