ASTROSAT CZTI

Data Quality Report

Orbit 20171026_T01_202T01_9000001640_level2

Creation date: 2017-10-30T15:14:23.817165
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/AS1T01_202T01_9000001640cztM0_level2.evt modeM0/AS1T01_202T01_9000001640cztM0_level2_quad_clean.evt
Size (bytes)5,785,050,2401,173,490,560
Size5.4 GB 1.1 GB
Events in quadrant A42,706,0527,888,537
Events in quadrant B40,774,9697,964,348
Events in quadrant C41,627,7227,770,714
Events in quadrant D45,665,8167,409,124

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01695300
B01633690
C01668920
D01790750

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0960
B0960
C0960
D0960

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013420
B013420
C013440
D013440

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6577728694.361707%
B6577528384.314709%
C6577752127.923742%
D6577431344.764801%

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 75688 65794 1363 1363 1.80% 2.07%
B 75688 65793 1025 1025 1.35% 1.56%
C 75688 65798 2939 2939 3.88% 4.47%
D 75688 65794 1967 1967 2.60% 2.99%

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 5533281 3077.34 8157 7993 1795.5
A 14 238 3191338 1772.98 8157 7993 1795.5
A 15 174 1064989 588.7 8157 7993 1795.5
B 4 239 6129540 3789.62 8220 8066 1615.3
B 11 51 900996 552.79 8220 8066 1615.3
B 15 204 476505 290.0 8220 8066 1615.3
C 4 254 11058455 5994.85 7805 7921 1843.3
C 9 204 77785 37.9 7805 7921 1843.3
C 13 61 57257 26.76 7805 7921 1843.3
D 8 195 3432317 1699.78 7860 7660 2014.8
D 13 104 2559961 1266.8 7860 7660 2014.8
D 10 253 2402347 1188.57 7860 7660 2014.8

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