ASTROSAT CZTI

Data Quality Report

Orbit 20170803_C02_028T02_9000001428_level2

Creation date: 2017-09-24T13:40:03.936512
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/AS1C02_028T02_9000001428cztM0_level2.evt modeM0/AS1C02_028T02_9000001428cztM0_level2_quad_clean.evt
Size (bytes)1,227,614,400217,615,680
Size1.1 GB 207.5 MB
Events in quadrant A8,551,8981,343,954
Events in quadrant B9,051,6811,363,383
Events in quadrant C8,073,9041,346,698
Events in quadrant D10,287,7051,300,681

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03660
B03660
C03660
D03660

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0375890
B0388400
C0368050
D0423930

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B060
C060
D060

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A179236163.436925%
B179216063.381508%
C179214282.388260%
D179226953.877915%

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 18556 17926 56 56 0.30% 0.31%
B 18556 17925 46 46 0.25% 0.26%
C 18556 17925 1 1 0.01% 0.01%
D 18556 17925 203 203 1.09% 1.13%

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 15 174 246953 570.64 2095 2045 429.2
A 8 15 233128 538.43 2095 2045 429.2
A 0 226 19141 39.83 2095 2045 429.2
B 4 239 234959 575.41 2102 2042 404.8
B 4 81 229413 561.71 2102 2042 404.8
B 0 214 146768 357.54 2102 2042 404.8
C 8 128 24906 47.78 2054 2063 478.1
C 13 61 15160 27.4 2054 2063 478.1
C 8 112 13502 23.93 2054 2063 478.1
D 1 52 907479 1730.65 2037 1980 523.2
D 2 16 628768 1197.96 2037 1980 523.2
D 8 195 479181 912.06 2037 1980 523.2

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