ASTROSAT CZTI

Data Quality Report

Orbit 20170611_A02_178T01_9000001286_level2

Creation date: 2021-08-27T00:37:04.209232
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/AS1A02_178T01_9000001286cztM0_level2_bc.evt modeM0/AS1A02_178T01_9000001286cztM0_level2_quad_clean.evt
Size (bytes)2,440,834,560802,281,600
Size2.3 GB 765.1 MB
Events in quadrant A24,806,8214,936,728
Events in quadrant B15,281,5555,053,632
Events in quadrant C12,762,6404,943,382
Events in quadrant D16,529,4124,800,117

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013540
B013600
C013580
D013540

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0760
B0800
C0770
D0790

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01807740
B01453580
C01368300
D01466610

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6605024473.704769%
B6667013512.026399%
C668068951.339700%
D6659115772.368188%

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 94718 68500 79 79 0.08% 0.12%
B 94718 68943 2 2 0.00% 0.00%
C 94717 69034 0 0 0.00% 0.00%
D 94717 68869 310 310 0.33% 0.45%

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 9666730 13493.18 3253 3183 716.2
A 5 16 966923 1345.67 3253 3183 716.2
A 1 162 617721 858.08 3253 3183 716.2
B 8 234 1085541 1688.89 3326 3221 640.8
B 0 214 298104 460.15 3326 3221 640.8
B 0 245 211835 325.53 3326 3221 640.8
C 3 233 68492 92.43 3217 3159 706.8
C 14 67 28241 35.48 3217 3159 706.8
C 8 222 26712 33.32 3217 3159 706.8
D 1 52 1987673 2354.65 3219 3107 842.8
D 7 71 463321 546.04 3219 3107 842.8
D 8 195 333751 392.3 3219 3107 842.8

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