ASTROSAT CZTI

Data Quality Report

Orbit 20220221_A11_058T02_9000004954_level2

Creation date: 2022-02-26T18:04:33.498444
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/AS1A11_058T02_9000004954cztM0_level2_bc.evt modeM0/AS1A11_058T02_9000004954cztM0_level2_quad_clean.evt
Size (bytes)2,063,831,040463,579,200
Size1.9 GB 442.1 MB
Events in quadrant A8,803,8372,937,340
Events in quadrant B15,174,7982,859,596
Events in quadrant C10,763,4182,885,270
Events in quadrant D25,091,0162,661,911

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01390

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0809870
B01094070
C0841790
D01391530

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08060
B08060
C08060
D08060

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A39314900.228926%
B3930427857.085793%
C389923850.987382%
D3934027136.896289%

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 58052 39337 17 17 0.03% 0.04%
B 58052 39317 175 175 0.30% 0.45%
C 58052 39007 77 77 0.13% 0.20%
D 58052 39347 275 275 0.47% 0.70%

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 10 83 218217 467.74 2109 2076 462.1
A 15 169 185233 396.36 2109 2076 462.1
A 13 6 92103 194.82 2109 2076 462.1
B 5 172 6071339 14981.84 2055 2014 405.1
B 4 171 275768 675.75 2055 2014 405.1
B 4 232 267916 656.37 2055 2014 405.1
C 15 214 1535742 3346.6 2015 2002 458.3
C 0 10 763258 1661.05 2015 2002 458.3
C 14 67 415922 903.17 2015 2002 458.3
D 8 195 11228678 23699.44 1995 1937 473.7
D 2 249 2897779 6113.07 1995 1937 473.7
D 13 249 483328 1016.21 1995 1937 473.7

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