ASTROSAT CZTI

Data Quality Report

Orbit 20180811_T02_079T01_9000002298_level2

Creation date: 2018-08-13T09:49:47.211193
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/AS1T02_079T01_9000002298cztM0_level2_bc.evt modeM0/AS1T02_079T01_9000002298cztM0_level2_quad_clean.evt
Size (bytes)725,137,920283,740,480
Size691.5 MB 270.6 MB
Events in quadrant A4,940,7561,779,466
Events in quadrant B4,924,2611,802,362
Events in quadrant C4,855,6621,741,682
Events in quadrant D5,686,1181,707,735

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0270
B0270
C0270
D0270

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04620
B04620
C04620
D04620

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0474170
B0476010
C0476010
D0502450

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A227152281.003742%
B227151470.647149%
C227152431.069778%
D227151550.682368%

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 25281 22715 71 71 0.28% 0.31%
B 25281 22716 1 1 0.00% 0.00%
C 25281 22716 1 1 0.00% 0.00%
D 25281 22715 12 12 0.05% 0.05%

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 0 253 494713 1988.76 1125 1100 248.2
A 9 143 74176 294.42 1125 1100 248.2
A 14 238 39878 156.24 1125 1100 248.2
B 4 173 94730 425.21 1138 1110 220.2
B 0 189 55592 247.45 1138 1110 220.2
B 4 190 50774 225.57 1138 1110 220.2
C 3 233 532203 2070.14 1083 1075 256.6
C 9 54 86635 333.48 1083 1075 256.6
C 10 187 23828 88.68 1083 1075 256.6
D 12 221 550762 2115.76 1108 1065 259.8
D 5 222 386861 1484.91 1108 1065 259.8
D 7 38 158547 606.14 1108 1065 259.8

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