ASTROSAT CZTI

Data Quality Report

Orbit 20171027_A04_080T01_9000001644_level2

Creation date: 2017-10-30T16:00:38.907695
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_080T01_9000001644cztM0_level2.evt modeM0/AS1A04_080T01_9000001644cztM0_level2_quad_clean.evt
Size (bytes)1,909,013,760203,558,400
Size1.8 GB 194.1 MB
Events in quadrant A11,350,7991,254,160
Events in quadrant B12,848,9871,237,240
Events in quadrant C8,424,4021,275,967
Events in quadrant D23,934,3141,107,345

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0260
B0260
C0260
D0260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0454730
B0505750
C0381880
D0842870

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03800
B03800
C03800
D03800

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A187105112.731160%
B1871012846.862640%
C18710890.475681%
D1871014557.776590%

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 21295 18713 287 287 1.35% 1.53%
B 21295 18713 693 693 3.25% 3.70%
C 21295 18713 5 5 0.02% 0.03%
D 21295 18713 961 961 4.51% 5.14%

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 14 238 1285073 2894.26 2181 2135 443.3
A 13 251 694570 1562.11 2181 2135 443.3
A 8 5 353791 793.32 2181 2135 443.3
B 4 239 2947665 7101.51 2169 2113 414.8
B 3 64 913024 2196.14 2169 2113 414.8
B 11 51 162934 387.73 2169 2113 414.8
C 9 204 32776 61.25 2150 2160 499.8
C 13 61 15725 27.14 2150 2160 499.8
C 5 239 10945 17.58 2150 2160 499.8
D 1 52 12605100 25555.34 2056 1999 493.2
D 10 253 910991 1843.17 2056 1999 493.2
D 13 152 863051 1745.96 2056 1999 493.2

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