ASTROSAT CZTI

Data Quality Report

Orbit 20180911_T02_104T01_9000002356_level2

Creation date: 2018-09-12T12:10:25.445941
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/AS1T02_104T01_9000002356cztM0_level2_bc.evt modeM0/AS1T02_104T01_9000002356cztM0_level2_quad_clean.evt
Size (bytes)774,308,160334,831,680
Size738.4 MB 319.3 MB
Events in quadrant A5,305,5672,117,893
Events in quadrant B5,501,7572,171,196
Events in quadrant C5,186,5242,098,366
Events in quadrant D5,752,8732,042,100

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0420
B0420
C0420
D0420

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0525940
B0532420
C0525780
D0548380

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05080
B05080
C05080
D05080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A248882751.104950%
B248883351.346030%
C248884141.663452%
D248884231.699614%

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 29024 24889 50 50 0.17% 0.20%
B 29024 24888 2 2 0.01% 0.01%
C 29024 24890 4 4 0.01% 0.02%
D 29024 24891 7 7 0.02% 0.03%

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 15 239 393054 1417.27 1272 1248 276.5
A 12 96 18281 61.61 1272 1248 276.5
A 9 143 14115 46.54 1272 1248 276.5
B 15 222 145144 582.54 1299 1266 247.0
B 4 173 83254 331.96 1299 1266 247.0
B 10 245 76023 302.68 1299 1266 247.0
C 9 236 190722 647.83 1245 1235 292.5
C 0 207 60136 201.38 1245 1235 292.5
C 3 233 56083 187.52 1245 1235 292.5
D 10 70 427801 1458.49 1260 1217 292.5
D 12 110 267777 911.37 1260 1217 292.5
D 2 234 106040 358.39 1260 1217 292.5

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