ASTROSAT CZTI

Data Quality Report

Orbit 51519

Creation date: 2025-04-07T13:50:33.435059
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_090T01_9000006458_51519cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51519cztM0_level2_quad_clean.evt
Size (bytes)34,937,2804,317,120
Size33.3 MB 4.1 MB
Events in quadrant A310,50220,412
Events in quadrant B314,67026,241
Events in quadrant C302,51922,033
Events in quadrant D322,17418,102

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01332812094
B0101168818
C0102289008
D01441613154

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A088
B066
C099
D099

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08869
B08062
C08675
D09075

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A471112.335456%
B57020.350877%
C54030.555556%
D442163.619910%

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 5195 745 1 1 0.02% 0.13%
B 5211 863 1 1 0.02% 0.12%
C 5212 836 2 2 0.04% 0.24%
D 5206 690 8 8 0.15% 1.16%

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 12 3 39797 2777.12 49 47 14.3
A 12 250 31068 2167.27 49 47 14.3
A 15 174 21190 1477.15 49 47 14.3
B 5 185 20480 1349.68 60 59 15.1
B 15 52 12536 824.64 60 59 15.1
B 0 171 10183 669.12 60 59 15.1
C 3 233 41077 2427.2 55 54 16.9
C 13 3 19441 1147.07 55 54 16.9
C 15 205 5853 343.11 55 54 16.9
D 8 176 34563 2555.88 43 41 13.5
D 11 176 31218 2308.22 43 41 13.5
D 7 60 29775 2201.39 43 41 13.5

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