ASTROSAT CZTI

Data Quality Report

Orbit 20201202_A10_021T01_9000004044_level2

Creation date: 2021-01-07T03:21:03.718423
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/AS1A10_021T01_9000004044cztM0_level2_bc.evt modeM0/AS1A10_021T01_9000004044cztM0_level2_quad_clean.evt
Size (bytes)952,885,440303,690,240
Size908.7 MB 289.6 MB
Events in quadrant A5,072,8681,939,383
Events in quadrant B5,079,4621,936,312
Events in quadrant C5,184,3621,835,967
Events in quadrant D11,824,7381,778,166

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0150

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05080
B05080
C05080
D05080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0513710
B0517670
C0530220
D0733590

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A248312200.885989%
B248313701.490073%
C248314421.780033%
D2483113725.525351%

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 26131 24832 0 0 0.00% 0.00%
B 26130 24827 1 1 0.00% 0.00%
C 26130 24830 2 2 0.01% 0.01%
D 26131 24831 368 368 1.41% 1.48%

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 43237 146.26 1296 1269 287.0
A 13 254 36871 124.07 1296 1269 287.0
A 8 192 14359 45.62 1296 1269 287.0
B 0 190 32226 123.28 1300 1264 251.2
B 4 200 29770 113.5 1300 1264 251.2
B 10 245 18590 68.98 1300 1264 251.2
C 3 233 283508 969.62 1239 1234 291.1
C 2 16 105505 358.18 1239 1234 291.1
C 10 22 33845 112.02 1239 1234 291.1
D 1 52 3363445 11554.74 1246 1199 291.0
D 8 195 2233188 7670.49 1246 1199 291.0
D 7 80 1176437 4038.84 1246 1199 291.0

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