ASTROSAT CZTI

Data Quality Report

Orbit 20201031_A09_038T23_9000003944_level2

Creation date: 2021-01-07T16:37:04.119425
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_038T23_9000003944cztM0_level2_bc.evt modeM0/AS1A09_038T23_9000003944cztM0_level2_quad_clean.evt
Size (bytes)173,839,68082,097,280
Size165.8 MB 78.3 MB
Events in quadrant A1,084,354537,867
Events in quadrant B1,320,491541,095
Events in quadrant C1,062,836519,940
Events in quadrant D1,419,357507,549

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01100
B01100
C01100
D01100

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0111400
B0119490
C0112990
D0121350

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5426681.253225%
B54261142.100995%
C5426801.474383%
D54261081.990417%

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 5956 5425 0 0 0.00% 0.00%
B 5955 5424 1 1 0.02% 0.02%
C 5956 5425 1 1 0.02% 0.02%
D 5956 5426 35 35 0.59% 0.65%

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 13510 212.6 270 263 62.3
A 4 2 11471 179.88 270 263 62.3
A 13 254 9372 146.19 270 263 62.3
B 10 245 193209 3544.73 271 264 54.4
B 0 230 28292 514.92 271 264 54.4
B 4 200 20061 363.71 271 264 54.4
C 7 221 46938 732.25 260 258 63.7
C 2 16 15204 234.45 260 258 63.7
C 13 61 1425 18.31 260 258 63.7
D 1 52 257625 4048.29 263 253 63.6
D 2 250 60632 949.72 263 253 63.6
D 7 80 60093 941.24 263 253 63.6

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