ASTROSAT CZTI

Data Quality Report

Orbit 20171123_A04_037T02_9000001718_level2

Creation date: 2017-11-25T09:03:06.481295
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_037T02_9000001718cztM0_level2_bc.evt modeM0/AS1A04_037T02_9000001718cztM0_level2_quad_clean.evt
Size (bytes)1,567,840,320442,264,320
Size1.5 GB 421.8 MB
Events in quadrant A13,502,1582,715,625
Events in quadrant B8,104,3362,819,722
Events in quadrant C7,101,4342,744,199
Events in quadrant D16,210,3152,534,879

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07660
B07660
C07660
D07660

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0420
B0420
C0420
D0420

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01089050
B0798570
C0765630
D01169450

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A3755922746.054474%
B375593921.043691%
C375591060.282223%
D37559421711.227668%

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 41750 37562 124 124 0.30% 0.33%
B 41750 37560 1 1 0.00% 0.00%
C 41750 37560 0 0 0.00% 0.00%
D 41750 37560 14 14 0.03% 0.04%

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 5733872 14503.07 1786 1745 395.2
A 1 162 602493 1519.97 1786 1745 395.2
A 1 178 86982 215.66 1786 1745 395.2
B 4 239 543697 1510.59 1855 1800 358.7
B 15 204 190964 527.31 1855 1800 358.7
B 0 214 107814 295.52 1855 1800 358.7
C 8 128 18691 42.52 1803 1772 398.0
C 13 61 10742 22.54 1803 1772 398.0
C 8 112 10121 20.98 1803 1772 398.0
D 13 104 8218425 20239.12 1735 1668 406.0
D 10 199 250964 614.05 1735 1668 406.0
D 8 195 250249 612.29 1735 1668 406.0

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