ASTROSAT CZTI

Data Quality Report

Orbit 20160131_G02_021T07_9000000306_level2

Creation date: 2017-10-26T19:33:35.881622
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/AS1G02_021T07_9000000306cztM0_level2.evt modeM0/AS1G02_021T07_9000000306cztM0_level2_quad_clean.evt
Size (bytes)3,864,450,240280,440,000
Size3.6 GB 267.4 MB
Events in quadrant A29,841,8551,739,002
Events in quadrant B30,014,5141,762,041
Events in quadrant C28,491,3281,725,647
Events in quadrant D27,163,6551,674,025

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06910
B06360
C06580
D05170

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B170
C170
D110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01048910
B01053830
C01009870
D0970270

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A228243761.647389%
B228154071.783914%
C228283921.717189%
D228453631.588969%

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 72582 22840 1685 1685 2.32% 7.38%
B 72582 22823 1680 1680 2.31% 7.36%
C 72582 22852 1737 1737 2.39% 7.60%
D 72582 22879 1557 1557 2.15% 6.81%

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 0 231 845694 464.52 7488 7513 1804.4
A 15 175 352034 190.93 7488 7513 1804.4
A 10 2 28966 11.89 7488 7513 1804.4
B 8 3 138936 70.82 7774 7789 1851.8
B 12 67 107211 53.69 7774 7789 1851.8
B 0 198 106082 53.08 7774 7789 1851.8
C 8 208 809157 407.89 7038 7277 1965.9
C 9 85 87033 40.57 7038 7277 1965.9
C 14 223 53257 23.39 7038 7277 1965.9
D 2 32 559330 259.2 6864 7104 2130.5
D 1 83 247588 112.88 6864 7104 2130.5
D 10 85 228835 104.07 6864 7104 2130.5

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