ASTROSAT CZTI

Data Quality Report

Orbit 18420

Creation date: 2024-06-27T17:49:35.848355
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/AS1A05_199T01_9000002732_18420cztM0_level2.evt modeM0/AS1A05_199T01_9000002732_18420cztM0_level2_quad_clean.evt
Size (bytes)1,323,109,440238,613,760
Size1.2 GB 227.6 MB
Events in quadrant A8,870,4081,508,214
Events in quadrant B8,920,9631,534,725
Events in quadrant C8,740,1841,476,704
Events in quadrant D12,283,0571,427,408

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0387515
B0386555
C0381045
D0488215

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03800
B03800
C03800
D03800

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0250
B0250
C0250
D0250

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A185713261.755425%
B185723411.836097%
C185723742.013784%
D1857210375.583674%

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 21051 18576 19 19 0.09% 0.10%
B 21052 18577 3 3 0.01% 0.02%
C 21052 18577 0 0 0.00% 0.00%
D 21052 18577 539 539 2.56% 2.90%

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 4 2 217158 479.3 2226 2180 448.5
A 15 174 100427 219.05 2226 2180 448.5
A 0 226 18972 37.44 2226 2180 448.5
B 0 189 119991 273.41 2230 2167 430.9
B 12 111 51387 114.21 2230 2167 430.9
B 11 111 44500 98.23 2230 2167 430.9
C 14 238 329823 655.93 2138 2147 499.6
C 3 233 71989 139.81 2138 2147 499.6
C 13 61 15248 26.22 2138 2147 499.6
D 1 52 2210466 4331.81 2110 2048 509.8
D 8 230 599465 1171.83 2110 2048 509.8
D 10 66 533775 1042.98 2110 2048 509.8

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