ASTROSAT CZTI

Data Quality Report

Orbit 20220618_C07_001T08_9000005190_level2

Creation date: 2022-07-05T10:44:10.082004
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/AS1C07_001T08_9000005190cztM0_level2_bc.evt modeM0/AS1C07_001T08_9000005190cztM0_level2_quad_clean.evt
Size (bytes)1,029,072,960355,602,240
Size981.4 MB 339.1 MB
Events in quadrant A5,669,0412,310,875
Events in quadrant B8,876,0912,254,615
Events in quadrant C6,364,0502,311,206
Events in quadrant D8,556,2712,181,504

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0710
B0700
C0700
D0710

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0513530
B0662290
C0525180
D0637480

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05080
B05080
C05080
D05080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A24895620.249046%
B2489513165.286202%
C24895940.377586%
D248958293.329986%

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 31937 24900 2 2 0.01% 0.01%
B 31937 24891 49 49 0.15% 0.20%
C 31937 24896 13 13 0.04% 0.05%
D 31937 24892 49 49 0.15% 0.20%

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 686104 2563.18 1195 1173 267.2
A 9 143 187958 698.99 1195 1173 267.2
A 12 189 61256 224.84 1195 1173 267.2
B 5 172 1798980 7713.93 1169 1144 233.1
B 5 236 943191 4042.02 1169 1144 233.1
B 5 255 345728 1478.5 1169 1144 233.1
C 15 214 1013249 3647.54 1186 1170 277.5
C 0 207 395870 1422.5 1186 1170 277.5
C 0 10 236306 847.43 1186 1170 277.5
D 12 6 1691843 5904.34 1177 1136 286.4
D 12 235 461341 1607.14 1177 1136 286.4
D 13 171 301227 1047.99 1177 1136 286.4

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