ASTROSAT CZTI

Data Quality Report

Orbit 20200908_A09_044T02_9000003852_level2

Creation date: 2021-01-08T12:45:45.474929
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

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/AS1A09_044T02_9000003852cztM0_level2_bc.evt modeM0/AS1A09_044T02_9000003852cztM0_level2_quad_clean.evt
Size (bytes)2,918,442,240432,273,600
Size2.7 GB 412.2 MB
Events in quadrant A11,968,1562,994,492
Events in quadrant B30,121,2322,103,731
Events in quadrant C9,461,3022,868,076
Events in quadrant D34,134,1332,392,584

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08120
B08120
C08120
D08120

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0890
B0890
C0890
D0890

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0957670
B01660490
C0877550
D01839710

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A396964451.121020%
B396961154729.088573%
C396967421.869206%
D396961084127.310056%

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 48701 39695 2 2 0.00% 0.01%
B 48701 39692 4004 4004 8.22% 10.09%
C 48701 39697 19 19 0.04% 0.05%
D 48701 39694 2255 2255 4.63% 5.68%

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 13 2709843 5385.54 2375 2345 502.7
A 13 254 60227 115.13 2375 2345 502.7
A 6 16 38731 72.38 2375 2345 502.7
B 0 189 22078112 58906.97 2020 1977 374.8
B 10 246 148321 390.5 2020 1977 374.8
B 3 112 71366 185.15 2020 1977 374.8
C 2 16 565317 1089.68 2245 2246 516.7
C 10 22 145523 277.28 2245 2246 516.7
C 15 208 115924 220.0 2245 2246 516.7
D 7 80 22591010 46697.48 2009 1957 483.7
D 1 52 2167036 4475.78 2009 1957 483.7
D 2 250 394606 811.71 2009 1957 483.7

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