ASTROSAT CZTI

Data Quality Report

Orbit 20200909_A09_038T07_9000003858_level2

Creation date: 2021-01-08T12:16:48.600011
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_038T07_9000003858cztM0_level2_bc.evt modeM0/AS1A09_038T07_9000003858cztM0_level2_quad_clean.evt
Size (bytes)565,384,32075,948,480
Size539.2 MB 72.4 MB
Events in quadrant A2,601,192534,933
Events in quadrant B7,706,963417,398
Events in quadrant C1,125,999531,377
Events in quadrant D5,308,715429,898

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0161830
B0330250
C0113860
D0283600

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01120
B01120
C01120
D01120

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A54941192.165999%
B5494312356.843830%
C5494601.092100%
D5494201036.585366%

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 5949 5494 4 4 0.07% 0.07%
B 5949 5493 1327 1327 22.31% 24.16%
C 5949 5494 2 2 0.03% 0.04%
D 5949 5493 325 325 5.46% 5.92%

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 1519706 24399.02 275 269 62.3
A 6 16 10203 159.52 275 269 62.3
A 13 254 9371 146.16 275 269 62.3
B 0 189 6889555 158121.09 210 205 43.6
B 0 228 3777 81.98 210 205 43.6
B 0 229 3263 70.19 210 205 43.6
C 2 16 49213 746.0 269 268 65.6
C 1 0 18816 282.7 269 268 65.6
C 8 128 9343 138.32 269 268 65.6
D 7 80 4042651 71586.16 230 223 56.5
D 1 52 246037 4353.05 230 223 56.5
D 2 250 71995 1270.99 230 223 56.5

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