ASTROSAT CZTI

Data Quality Report

Orbit 20220225_T04_078T01_9000004962_level2

Creation date: 2022-03-01T13:37:48.084565
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/AS1T04_078T01_9000004962cztM0_level2_bc.evt modeM0/AS1T04_078T01_9000004962cztM0_level2_quad_clean.evt
Size (bytes)406,981,44066,522,240
Size388.1 MB 63.4 MB
Events in quadrant A1,670,227392,334
Events in quadrant B2,447,160386,546
Events in quadrant C2,299,357381,992
Events in quadrant D5,425,444364,670

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0146250
B0182530
C0165210
D0276130

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0250
B0250
C0250
D0260

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7015220.313614%
B70153795.402708%
C70151051.496793%
D70153875.516750%

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 9050 7016 3 3 0.03% 0.04%
B 9049 7014 28 28 0.31% 0.40%
C 9049 7014 17 17 0.19% 0.24%
D 9049 7014 36 36 0.40% 0.51%

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 49880 584.67 378 371 84.7
A 9 143 44989 526.91 378 371 84.7
A 15 169 27330 318.37 378 371 84.7
B 5 172 555753 7409.51 369 362 75.0
B 5 255 251380 3348.85 369 362 75.0
B 0 218 97664 1298.11 369 362 75.0
C 15 214 284808 3479.64 358 356 81.7
C 0 10 169475 2068.8 358 356 81.7
C 14 67 154375 1884.08 358 356 81.7
D 8 195 2596128 27082.99 357 348 95.8
D 7 38 538689 5616.76 357 348 95.8
D 2 249 219654 2288.12 357 348 95.8

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