ASTROSAT CZTI

Data Quality Report

Orbit 31772

Creation date: 2024-06-27T20:32:32.221767
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/AS1A10_109T01_9000004638_31772cztM0_level2.evt modeM0/AS1A10_109T01_9000004638_31772cztM0_level2_quad_clean.evt
Size (bytes)594,789,120129,052,800
Size567.2 MB 123.1 MB
Events in quadrant A3,743,522896,996
Events in quadrant B5,314,394884,602
Events in quadrant C4,652,404855,071
Events in quadrant D3,885,598841,126

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0152171
B0197761
C0183661
D0156811

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A61731322.138344%
B61732484.017496%
C61733906.317836%
D6173761.231168%

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 7493 6174 36 36 0.48% 0.58%
B 7493 6174 65 65 0.87% 1.05%
C 7493 6174 140 140 1.87% 2.27%
D 7493 6174 10 10 0.13% 0.16%

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 172211 939.64 926 913 182.3
A 13 254 11212 56.49 926 913 182.3
A 3 137 8054 39.17 926 913 182.3
B 6 159 1548064 9265.65 896 878 167.0
B 4 80 228994 1366.12 896 878 167.0
B 12 111 18898 107.92 896 878 167.0
C 0 10 797562 3993.36 867 880 199.5
C 3 233 263557 1316.67 867 880 199.5
C 14 238 143639 715.58 867 880 199.5
D 8 195 372843 1752.26 902 882 212.3
D 2 250 56124 260.24 902 882 212.3
D 2 234 24482 111.18 902 882 212.3

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