ASTROSAT CZTI

Data Quality Report

Orbit 20171114_A04_022T05_9000001690_level2

Creation date: 2025-11-18T09:20:29.384702
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/AS1A04_022T05_9000001690cztM0_level2.fits modeM0/AS1A04_022T05_9000001690cztM0_level2_quad_clean.evt
Size (bytes)610,251,840619,813,440
Size582.0 MB 591.1 MB
Events in quadrant A3,543,7383,503,425
Events in quadrant B3,530,6023,587,858
Events in quadrant C3,699,9823,789,986
Events in quadrant D3,160,6163,346,442

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0950
B0950
C0950
D0950

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02048000
B01672400
C01354150
D01734350

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013480
B013480
C013480
D013480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6624162039.364291%
B6624127284.118295%
C662413610.544980%
D6624118132.736976%

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 75756 66046 0 0 0.00% 0.00%
B 75756 66240 0 0 0.00% 0.00%
C 75756 66241 0 0 0.00% 0.00%
D 75756 66219 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 3490 11.43 922 863 229.8
A 7 110 2867 8.72 922 863 229.8
A 9 19 2696 7.98 922 863 229.8
B 2 9 3000 11.48 931 887 184.0
B 14 254 2384 8.14 931 887 184.0
B 3 17 2377 8.1 931 887 184.0
C 1 80 2891 7.79 974 903 255.1
C 1 81 2828 7.55 974 903 255.1
C 12 250 2709 7.08 974 903 255.1
D 6 231 2350 6.35 902 821 240.7
D 3 14 2328 6.26 902 821 240.7
D 6 38 2219 5.81 902 821 240.7

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