ASTROSAT CZTI

Data Quality Report

Orbit 56864

Creation date: 2026-04-02T08:46:40.796029
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/AS1A14_083T03_9000006562_56864cztM0_level2.fits modeM0/AS1A14_083T03_9000006562_56864cztM0_level2_quad_clean.evt
Size (bytes)1,424,453,760257,097,600
Size1.3 GB 245.2 MB
Events in quadrant A12,504,2141,659,156
Events in quadrant B11,297,5001,815,497
Events in quadrant C11,971,9801,570,434
Events in quadrant D15,479,1441,424,740

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03860
B03860
C03860
D03860

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0509463
B0473143
C0493893
D0599253

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A190768624.518767%
B190779074.754416%
C1907711696.127798%
D1907718879.891492%

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 20386 19079 604 604 2.96% 3.17%
B 20387 19078 535 535 2.62% 2.80%
C 20387 19079 1025 1025 5.03% 5.37%
D 20387 19080 1787 1787 8.77% 9.37%

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 4258315 8769.11 1984 1936 485.4
A 3 62 283714 580.53 1984 1936 485.4
A 3 14 109718 222.06 1984 1936 485.4
B 5 185 1606168 3855.96 1947 1876 416.1
B 10 16 1155503 2772.77 1947 1876 416.1
B 7 0 357707 855.25 1947 1876 416.1
C 9 38 3006573 5781.23 1914 1893 519.7
C 1 16 417600 799.85 1914 1893 519.7
C 13 3 151650 288.14 1914 1893 519.7
D 2 249 4416739 8484.73 1866 1783 520.3
D 8 240 2985118 5733.42 1866 1783 520.3
D 5 173 159281 302.68 1866 1783 520.3

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