ASTROSAT CZTI

Data Quality Report

Orbit 20161220_A02_103T01_9000000904_level2

Creation date: 2017-09-22T13:47:40.399128
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/AS1A02_103T01_9000000904cztM0_level2.evt modeM0/AS1A02_103T01_9000000904cztM0_level2_quad_clean.evt
Size (bytes)6,309,253,440937,042,560
Size5.9 GB 893.6 MB
Events in quadrant A40,850,8765,845,056
Events in quadrant B37,272,0176,042,024
Events in quadrant C38,533,6995,857,005
Events in quadrant D69,262,5235,385,916

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01120
B01120
C01120
D01120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01727320
B01619850
C01681470
D02585620

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015560
B015560
C015560
D015560

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7655928223.686046%
B7656012961.692790%
C7655919142.500033%
D765551052913.753511%

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 87681 76582 1090 1090 1.24% 1.42%
B 87681 76583 72 72 0.08% 0.09%
C 87681 76582 800 800 0.91% 1.04%
D 87681 76583 7465 7465 8.51% 9.75%

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 14 111 2947539 1627.82 8967 8765 1805.3
A 8 15 2535687 1399.69 8967 8765 1805.3
A 15 236 386186 209.06 8967 8765 1805.3
B 0 228 345146 193.13 9134 8914 1741.0
B 0 214 341071 190.79 9134 8914 1741.0
B 4 81 332833 186.06 9134 8914 1741.0
C 9 247 4161212 2061.72 8749 8789 2014.1
C 4 254 143713 66.99 8749 8789 2014.1
C 13 61 68568 29.68 8749 8789 2014.1
D 2 33 23417658 11602.86 8264 8026 2017.6
D 8 195 5794487 2868.03 8264 8026 2017.6
D 12 221 3192254 1578.25 8264 8026 2017.6

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