ASTROSAT CZTI

Data Quality Report

Orbit 20170416_C02_037T02_9000001170_level2

Creation date: 2017-09-23T17:56:24.153089
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_037T02_9000001170cztM0_level2.evt modeM0/AS1C02_037T02_9000001170cztM0_level2_quad_clean.evt
Size (bytes)992,350,080200,073,600
Size946.4 MB 190.8 MB
Events in quadrant A7,140,6231,286,623
Events in quadrant B7,683,1431,291,232
Events in quadrant C6,834,8311,259,694
Events in quadrant D7,411,0961,218,855

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0360
B0360
C0360
D0360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0302630
B0315770
C0298910
D0316430

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02960
B02960
C02960
D02960

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A145401801.237964%
B145402261.554333%
C14540930.639615%
D145401911.313618%

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 16955 14543 1 1 0.01% 0.01%
B 16955 14542 27 27 0.16% 0.19%
C 16955 14543 0 0 0.00% 0.00%
D 16955 14543 67 67 0.40% 0.46%

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 46074 119.95 1829 1793 369.1
A 0 226 17407 42.3 1829 1793 369.1
A 12 194 16245 39.15 1829 1793 369.1
B 0 214 199411 575.29 1826 1790 343.5
B 4 48 132571 380.71 1826 1790 343.5
B 10 16 102984 294.58 1826 1790 343.5
C 13 61 13425 28.78 1752 1765 405.2
C 1 16 4493 6.73 1752 1765 405.2
C 3 202 4425 6.57 1752 1765 405.2
D 14 34 202809 470.9 1758 1710 427.1
D 7 71 137689 318.41 1758 1710 427.1
D 2 14 137081 316.99 1758 1710 427.1

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