ASTROSAT CZTI

Data Quality Report

Orbit 20200818_A09_056T01_9000003824_level2

Creation date: 2025-12-14T11:00:01.013035
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/AS1A09_056T01_9000003824cztM0_level2.fits modeM0/AS1A09_056T01_9000003824cztM0_level2_quad_clean.evt
Size (bytes)401,088,960230,330,880
Size382.5 MB 219.7 MB
Events in quadrant A2,534,6951,141,885
Events in quadrant B2,421,1841,138,452
Events in quadrant C2,468,7221,090,724
Events in quadrant D2,096,422977,446

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07720
B07860
C07840
D07880

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0960
B0960
C01080
D0980

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0828990
B0837930
C0888530
D01050610

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A383703921.021631%
B381264481.175051%
C3837410202.658050%
D3795123736.252800%

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 52289 38278 0 0 0.00% 0.00%
B 52289 38072 0 0 0.00% 0.00%
C 52289 38286 0 0 0.00% 0.00%
D 52289 37896 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 2135 9.31 662 625 162.2
A 7 110 1959 8.23 662 625 162.2
A 0 30 1889 7.79 662 625 162.2
B 2 9 1842 9.71 641 615 126.4
B 5 128 1602 7.81 641 615 126.4
B 2 8 1576 7.6 641 615 126.4
C 1 81 1932 7.95 653 617 165.3
C 1 80 1906 7.8 653 617 165.3
C 3 126 1703 6.57 653 617 165.3
D 10 189 1544 6.3 598 548 158.1
D 3 14 1532 6.22 598 548 158.1
D 15 46 1473 5.85 598 548 158.1

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