ASTROSAT CZTI

Data Quality Report

Orbit 20171221_A04_176T01_9000001786_level2

Creation date: 2017-12-23T10:39:33.330421
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/AS1A04_176T01_9000001786cztM0_level2_bc.evt modeM0/AS1A04_176T01_9000001786cztM0_level2_quad_clean.evt
Size (bytes)1,631,975,040495,123,840
Size1.5 GB 472.2 MB
Events in quadrant A8,597,4333,186,259
Events in quadrant B17,431,6303,040,574
Events in quadrant C7,456,1663,111,236
Events in quadrant D13,288,7752,988,430

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0540
B0540
C0540
D0540

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0827560
B01175500
C0792730
D0972350

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07900
B07900
C07900
D07900

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A388804901.260288%
B3888027307.021605%
C388802300.591564%
D3888013413.449074%

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 44221 38874 8 8 0.02% 0.02%
B 44221 38875 72 72 0.16% 0.19%
C 44221 38879 0 0 0.00% 0.00%
D 44221 38877 246 246 0.56% 0.63%

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 244246 568.91 1968 1931 425.9
A 13 251 223552 520.33 1968 1931 425.9
A 1 162 209024 486.22 1968 1931 425.9
B 4 206 4970602 13694.54 1905 1856 362.8
B 4 239 4180931 11518.1 1905 1856 362.8
B 15 204 441805 1212.56 1905 1856 362.8
C 0 207 24592 53.79 1896 1861 422.6
C 14 234 18475 39.31 1896 1861 422.6
C 13 61 11512 22.84 1896 1861 422.6
D 1 52 3842362 8793.03 1890 1821 436.8
D 8 195 1233630 2820.26 1890 1821 436.8
D 10 199 185641 420.86 1890 1821 436.8

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