ASTROSAT CZTI

Data Quality Report

Orbit 20170219_A02_024T01_9000001044_level2

Creation date: 2025-11-09T17:29:08.760083
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/AS1A02_024T01_9000001044cztM0_level2.fits modeM0/AS1A02_024T01_9000001044cztM0_level2_quad_clean.evt
Size (bytes)1,208,684,1601,183,720,320
Size1.1 GB 1.1 GB
Events in quadrant A7,346,2467,105,475
Events in quadrant B7,144,3827,175,961
Events in quadrant C7,126,6266,632,904
Events in quadrant D6,269,7366,223,385

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A025940
B025920
C025900
D025920

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02899790
B02695270
C03336280
D03297950

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01930
B01930
C01930
D01930

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12714926742.103044%
B12716218701.470565%
C12717273685.793728%
D12715653334.194061%

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 175021 127210 0 0 0.00% 0.00%
B 175021 127219 0 0 0.00% 0.00%
C 175021 127207 0 0 0.00% 0.00%
D 175021 127185 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 7143 11.12 1910 1782 482.0
A 7 110 6088 8.93 1910 1782 482.0
A 0 30 5583 7.89 1910 1782 482.0
B 2 9 6307 12.14 1880 1786 372.5
B 12 226 4776 8.03 1880 1786 372.5
B 5 232 4699 7.82 1880 1786 372.5
C 1 80 5046 6.66 1884 1744 496.0
C 1 81 5009 6.58 1884 1744 496.0
C 12 241 4805 6.17 1884 1744 496.0
D 6 231 4586 6.21 1788 1625 477.1
D 7 5 4402 5.82 1788 1625 477.1
D 10 189 4375 5.76 1788 1625 477.1

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