ASTROSAT CZTI

Data Quality Report

Orbit 20180627_A04_218T01_9000002194_level2

Creation date: 2018-06-29T15:06:55.551902
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_218T01_9000002194cztM0_level2_bc.evt modeM0/AS1A04_218T01_9000002194cztM0_level2_quad_clean.evt
Size (bytes)4,066,367,0401,403,496,000
Size3.8 GB 1.3 GB
Events in quadrant A22,582,6169,232,166
Events in quadrant B26,058,7659,068,561
Events in quadrant C24,528,9998,955,025
Events in quadrant D43,303,6238,533,283

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019960
B019960
C019960
D019960

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02083660
B02234180
C02118540
D02792860

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01760
B01760
C01760
D01770

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9808912531.277411%
B9808719201.957446%
C980919060.923632%
D9809682978.458041%

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 115347 98111 17 17 0.01% 0.02%
B 115347 98105 101 101 0.09% 0.10%
C 115347 98110 2 2 0.00% 0.00%
D 115347 98101 3278 3278 2.84% 3.34%

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 12 189 999524 843.77 5449 5354 1178.2
A 9 143 249200 206.96 5449 5354 1178.2
A 15 239 137872 112.47 5449 5354 1178.2
B 3 64 1426240 1422.27 5375 5245 999.1
B 0 219 1015781 1011.44 5375 5245 999.1
B 0 189 826520 822.01 5375 5245 999.1
C 3 233 3799601 3337.18 5220 5158 1137.0
C 6 96 159482 135.73 5220 5158 1137.0
C 7 247 85992 71.09 5220 5158 1137.0
D 13 104 16552819 13821.61 5129 4991 1197.2
D 7 254 3792291 3163.35 5129 4991 1197.2
D 15 0 1596625 1329.42 5129 4991 1197.2

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