ASTROSAT CZTI

Data Quality Report

Orbit 00941

Creation date: 2024-06-27T14:05:03.730493
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/AS1P01_998T01_9000000188_00941cztM0_level2.evt modeM0/AS1P01_998T01_9000000188_00941cztM0_level2_quad_clean.evt
Size (bytes)1,098,279,360102,121,920
Size1.0 GB 97.4 MB
Events in quadrant A8,339,003672,267
Events in quadrant B7,922,311679,909
Events in quadrant C7,706,931665,647
Events in quadrant D8,878,723637,311

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0292510
B0279660
C0273390
D0308420

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A62662053.271625%
B6267210.335089%
C6266260.414938%
D62661812.888605%

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 7511 6267 682 682 9.08% 10.88%
B 7512 6268 301 301 4.01% 4.80%
C 7511 6267 204 204 2.72% 3.26%
D 7511 6267 765 765 10.19% 12.21%

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 14 170 686947 1509.44 1913 1922 453.8
A 13 147 303214 663.89 1913 1922 453.8
A 11 79 8790 15.13 1913 1922 453.8
B 0 220 47632 97.3 2018 2023 468.7
B 5 249 44189 89.96 2018 2023 468.7
B 8 234 33110 66.32 2018 2023 468.7
C 15 241 224376 433.37 1868 1935 513.3
C 9 144 66614 126.01 1868 1935 513.3
C 10 34 51089 95.76 1868 1935 513.3
D 12 188 1328911 2430.99 1796 1861 545.9
D 1 4 659391 1204.51 1796 1861 545.9
D 10 157 77365 138.31 1796 1861 545.9

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