ASTROSAT CZTI

Data Quality Report

Orbit 20201103_T03_259T01_9000003972_level2

Creation date: 2021-01-07T15:05:24.165391
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/AS1T03_259T01_9000003972cztM0_level2_bc.evt modeM0/AS1T03_259T01_9000003972cztM0_level2_quad_clean.evt
Size (bytes)1,457,982,720436,127,040
Size1.4 GB 415.9 MB
Events in quadrant A7,249,4072,843,310
Events in quadrant B8,181,4322,887,002
Events in quadrant C7,210,9322,775,464
Events in quadrant D19,194,1062,370,818

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0400
B0400
C0400
D0400

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06920
B06920
C06920
D06920

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0705840
B0741960
C0713020
D01282910

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A339306671.965812%
B339309152.696729%
C339308632.543472%
D33930694620.471559%

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 38085 33933 31 31 0.08% 0.09%
B 38085 33931 2 2 0.01% 0.01%
C 38085 33932 3 3 0.01% 0.01%
D 38085 33933 797 797 2.09% 2.35%

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 15 169 174574 439.73 1819 1787 392.9
A 13 254 55837 137.55 1819 1787 392.9
A 8 192 28103 66.97 1819 1787 392.9
B 10 245 509397 1457.28 1844 1803 348.3
B 3 64 227125 646.89 1844 1803 348.3
B 4 52 88157 247.92 1844 1803 348.3
C 2 16 207557 495.69 1778 1774 415.1
C 14 67 77446 182.28 1778 1774 415.1
C 10 22 29230 66.14 1778 1774 415.1
D 7 80 6869809 19463.86 1542 1494 352.9
D 1 52 5269203 14927.97 1542 1494 352.9
D 6 112 489125 1381.88 1542 1494 352.9

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