ASTROSAT CZTI

Data Quality Report

Orbit 51826

Creation date: 2025-04-28T06:35:28.897487
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/AS1A13_090T01_9000006464_51826cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51826cztM0_level2_quad_clean.evt
Size (bytes)860,650,56087,632,640
Size820.8 MB 83.6 MB
Events in quadrant A4,828,529660,602
Events in quadrant B9,364,908507,971
Events in quadrant C4,586,107631,325
Events in quadrant D12,532,167360,628

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0180
C0180
D0180

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460
B01460
C01460
D01460

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0192782
B0327572
C0186084
D0421002

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A70681832.589134%
B7068235733.347482%
C70682803.961517%
D7068321445.472552%

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 8873 7070 127 127 1.43% 1.80%
B 8873 7070 1563 1563 17.62% 22.11%
C 8873 7070 213 213 2.40% 3.01%
D 8873 7070 2847 2847 32.09% 40.27%

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 11 3 776768 4164.92 759 741 186.3
A 12 3 364166 1950.5 759 741 186.3
A 5 240 225882 1208.33 759 741 186.3
B 15 54 3831085 26735.3 663 637 143.3
B 10 128 709009 4944.21 663 637 143.3
B 5 185 526104 3667.59 663 637 143.3
C 15 218 466955 2273.98 740 734 205.0
C 14 245 348215 1694.83 740 734 205.0
C 14 80 201717 980.29 740 734 205.0
D 11 129 9031927 56219.71 573 552 160.6
D 9 49 281272 1747.46 573 552 160.6
D 3 12 280791 1744.47 573 552 160.6

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