ASTROSAT CZTI

Data Quality Report

Orbit 20161210_A02_175T01_9000000874_level2

Creation date: 2017-09-21T12:29:49.735062
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/AS1A02_175T01_9000000874cztM0_level2.evt modeM0/AS1A02_175T01_9000000874cztM0_level2_quad_clean.evt
Size (bytes)1,486,964,160236,396,160
Size1.4 GB 225.4 MB
Events in quadrant A9,923,3101,456,561
Events in quadrant B9,496,3781,481,113
Events in quadrant C9,004,4071,446,007
Events in quadrant D15,229,6031,369,524

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04160
B04160
C04160
D04160

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0300
B0300
C0300
D0300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0427780
B0423370
C0414480
D0597340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A204291520.744040%
B204291320.646140%
C20429700.342650%
D204295742.809731%

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 23351 20434 5 5 0.02% 0.02%
B 23351 20434 35 35 0.15% 0.17%
C 23351 20434 0 0 0.00% 0.00%
D 23351 20434 338 338 1.45% 1.65%

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 15 758138 1588.22 2349 2302 475.9
A 15 236 104566 214.88 2349 2302 475.9
A 0 226 22504 42.45 2349 2302 475.9
B 0 219 122603 266.25 2360 2302 451.8
B 4 172 80576 173.24 2360 2302 451.8
B 4 48 56947 120.94 2360 2302 451.8
C 4 254 105744 196.29 2273 2290 527.1
C 13 61 17872 29.56 2273 2290 527.1
C 1 16 9956 14.54 2273 2290 527.1
D 2 152 6021754 10987.4 2249 2186 547.9
D 2 14 385307 699.3 2249 2186 547.9
D 10 172 82598 146.77 2249 2186 547.9

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