ASTROSAT CZTI

Data Quality Report

Orbit 46940

Creation date: 2024-06-27T23:29:42.573664
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

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/AS1A13_077T01_9000006286_46940cztM0_level2.fits modeM0/AS1A13_077T01_9000006286_46940cztM0_level2_quad_clean.evt
Size (bytes)659,361,60089,504,640
Size628.8 MB 85.4 MB
Events in quadrant A6,290,188652,259
Events in quadrant B9,876,514393,369
Events in quadrant C4,076,537630,926
Events in quadrant D3,697,298611,824

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01271
C01264
D01243

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A023622979
B0355742122
C017063575
D015643355

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0100
C0110
D0110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A59852023.375104%
B5915268245.342350%
C60713425.633339%
D61321001.630789%

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 7449 6224 61 61 0.82% 0.98%
B 7450 6065 2393 2393 32.12% 39.46%
C 7450 6224 309 309 4.15% 4.96%
D 7450 6255 81 81 1.09% 1.29%

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 10 83 3571880 25185.18 675 661 141.8
A 9 191 54978 383.06 675 661 141.8
A 0 243 17355 117.73 675 661 141.8
B 3 112 7288840 64618.21 570 554 112.8
B 0 198 58571 514.38 570 554 112.8
B 4 171 58375 512.64 570 554 112.8
C 12 2 1322850 8545.69 656 659 154.7
C 14 254 157464 1013.47 656 659 154.7
C 1 241 26205 165.11 656 659 154.7
D 1 52 630825 3649.91 680 660 172.7
D 8 176 64513 369.84 680 660 172.7
D 2 249 61857 354.45 680 660 172.7

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