ASTROSAT CZTI

Data Quality Report

Orbit 35285

Creation date: 2022-04-08T06:37:10.050562
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/AS1A11_082T01_9000005056_35285cztM0_level2.evt modeM0/AS1A11_082T01_9000005056_35285cztM0_level2_quad_clean.evt
Size (bytes)923,342,40099,829,440
Size880.6 MB 95.2 MB
Events in quadrant A3,742,651670,118
Events in quadrant B9,750,234595,868
Events in quadrant C6,859,685606,875
Events in quadrant D7,083,736605,487

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0161153
B0343912
C0257512
D0263352

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01580
B01580
C01580
D01580

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0290
B0290
C0290
D0290

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7824210.268405%
B7824192624.616564%
C78247069.023517%
D7824105813.522495%

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 10750 7826 4 4 0.04% 0.05%
B 10750 7826 1451 1451 13.50% 18.54%
C 10750 7826 667 667 6.20% 8.52%
D 10750 7825 912 912 8.48% 11.65%

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 114023 601.1 925 904 188.2
A 15 169 21511 109.5 925 904 188.2
A 13 6 17475 88.06 925 904 188.2
B 5 172 3613472 22273.85 838 814 162.2
B 5 236 2787724 17182.7 838 814 162.2
B 3 112 22069 131.05 838 814 162.2
C 9 187 1092304 5431.13 865 871 201.0
C 0 10 914230 4545.01 865 871 201.0
C 4 254 744126 3698.55 865 871 201.0
D 7 80 1493453 7061.09 861 836 211.4
D 13 249 902742 4266.63 861 836 211.4
D 12 233 446336 2107.52 861 836 211.4

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