ASTROSAT CZTI

Data Quality Report

Orbit 51471

Creation date: 2025-04-04T08:14:06.921659
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_51471cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51471cztM0_level2_quad_clean.evt
Size (bytes)800,953,920108,388,800
Size763.8 MB 103.4 MB
Events in quadrant A6,433,586728,939
Events in quadrant B6,106,255742,954
Events in quadrant C4,407,076735,034
Events in quadrant D12,067,205505,071

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0249650
B0237920
C0191410
D0415540

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01640
B01640
C01640
D01640

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A81955787.053081%
B819498712.045399%
C81951652.013423%
D8195261131.860891%

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 8195 8195 313 313 3.82% 3.82%
B 8194 8194 351 351 4.28% 4.28%
C 8195 8195 119 119 1.45% 1.45%
D 8195 8195 2260 2260 27.58% 27.58%

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 12 250 1940452 9252.02 860 838 209.6
A 12 3 362243 1723.91 860 838 209.6
A 8 249 203727 967.79 860 838 209.6
B 12 32 1317508 7319.53 835 806 179.9
B 8 234 311847 1729.07 835 806 179.9
B 4 206 304700 1689.34 835 806 179.9
C 13 3 625509 2617.74 865 860 238.6
C 15 205 94997 394.5 865 860 238.6
C 15 219 72260 299.22 865 860 238.6
D 8 176 8016739 38769.19 736 712 206.8
D 3 12 299646 1445.78 736 712 206.8
D 2 249 136490 656.68 736 712 206.8

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