ASTROSAT CZTI

Data Quality Report

Orbit 51447

Creation date: 2025-04-02T18:47:37.689937
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_9000006458_51447cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51447cztM0_level2_quad_clean.evt
Size (bytes)2,498,258,880233,553,600
Size2.3 GB 222.7 MB
Events in quadrant A21,339,5741,610,032
Events in quadrant B13,168,0671,870,321
Events in quadrant C43,111,630586,231
Events in quadrant D13,281,0101,596,424

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0776855
B0534775
C01420895
D0542975

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0210
B0210
C0210
D0210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04120
B04120
C04120
D04120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A20443313715.345106%
B2044316197.919581%
C204431458471.339823%
D2044212075.904510%

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 22413 20443 2439 2439 10.88% 11.93%
B 22413 20444 899 899 4.01% 4.40%
C 22413 20443 14030 14030 62.60% 68.63%
D 22412 20443 874 874 3.90% 4.28%

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 64 4125751 8048.82 2098 2052 512.3
A 12 3 3598662 7020.03 2098 2052 512.3
A 15 174 1312810 2558.4 2098 2052 512.3
B 5 185 2647798 5838.21 2135 2056 453.2
B 0 171 353443 775.39 2135 2056 453.2
B 4 206 324716 711.99 2135 2056 453.2
C 4 12 30514272 97144.42 1152 1145 314.1
C 15 179 5156729 16413.79 1152 1145 314.1
C 3 233 854988 2718.37 1152 1145 314.1
D 6 42 2350192 3951.85 2131 2050 594.2
D 7 60 620650 1041.09 2131 2050 594.2
D 3 12 438971 735.33 2131 2050 594.2

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