ASTROSAT CZTI

Data Quality Report

Orbit 20201214_A10_090T16_9000004070_level2

Creation date: 2021-01-06T21:45:29.019927
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/AS1A10_090T16_9000004070cztM0_level2_bc.evt modeM0/AS1A10_090T16_9000004070cztM0_level2_quad_clean.evt
Size (bytes)1,844,029,440572,063,040
Size1.7 GB 545.6 MB
Events in quadrant A8,841,4553,800,201
Events in quadrant B9,060,2303,838,740
Events in quadrant C8,935,1463,661,075
Events in quadrant D26,151,6723,148,843

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08580
B08580
C08580
D08580

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0869580
B0882270
C0889960
D01601290

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0550
B0550
C0550
D0550

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A418714681.117719%
B418766141.466234%
C418728532.037161%
D41865755818.053266%

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 47732 41888 0 0 0.00% 0.00%
B 47732 41893 20 20 0.04% 0.05%
C 47732 41887 2 2 0.00% 0.00%
D 47731 41868 1403 1403 2.94% 3.35%

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 12 16 349071 734.13 2158 2117 472.6
A 12 194 66264 135.73 2158 2117 472.6
A 5 98 65850 134.85 2158 2117 472.6
B 10 246 232724 555.45 2169 2114 415.2
B 15 32 176613 420.3 2169 2114 415.2
B 0 230 94732 223.08 2169 2114 415.2
C 3 233 833178 1692.39 2074 2065 491.1
C 15 208 92429 184.01 2074 2065 491.1
C 8 128 14172 24.65 2074 2065 491.1
D 1 52 14169424 31574.85 1904 1842 448.7
D 5 222 1743181 3880.87 1904 1842 448.7
D 7 80 1028168 2287.34 1904 1842 448.7

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