ASTROSAT CZTI

Data Quality Report

Orbit 20171109_A04_021T03_9000001678_level2

Creation date: 2018-01-08T21:35:48.256453
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_021T03_9000001678cztM0_level2_bc.evt modeM0/AS1A04_021T03_9000001678cztM0_level2_quad_clean.evt
Size (bytes)2,745,694,080836,789,760
Size2.6 GB 798.0 MB
Events in quadrant A13,870,6455,234,693
Events in quadrant B24,590,1415,089,001
Events in quadrant C13,049,6755,589,091
Events in quadrant D27,207,2904,966,645

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0930
B0930
C0930
D0930

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013220
B013220
C013220
D013220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01382300
B01830460
C01335120
D01938720

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A651077181.102800%
B6510744236.793432%
C651073960.608230%
D6510762729.633373%

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 74273 65108 6 6 0.01% 0.01%
B 74273 65107 163 163 0.22% 0.25%
C 74273 65113 0 0 0.00% 0.00%
D 74273 65095 951 951 1.28% 1.46%

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 8 5 406154 563.16 3270 3206 715.5
A 1 162 236531 326.09 3270 3206 715.5
A 9 143 215837 297.17 3270 3206 715.5
B 4 239 7798341 12887.6 3197 3113 604.9
B 3 64 1568805 2588.51 3197 3113 604.9
B 15 204 905860 1492.48 3197 3113 604.9
C 14 234 20964 22.53 3328 3248 786.2
C 13 61 19527 20.71 3328 3248 786.2
C 8 128 12785 12.13 3328 3248 786.2
D 1 52 8659411 11671.57 3143 3017 741.7
D 10 253 2308101 3107.98 3143 3017 741.7
D 8 195 1484810 1997.93 3143 3017 741.7

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