Running SExtractor 100,000 times

Running SExtractor 100,000 times

What is SExtractor?

SExtractor: Overview

History

History: SExtractor has already been used more than 100,000 times

Weight-maps

Using weight-maps for detection

Double-image mode:
Panchromatic detection

c² images

Configuration for a typical survey: input data

Configuration for a typical survey: input data (2)

Detection basics

Background subtraction

Background subtraction (2)

Image filtering

Image filtering (2)

Deblending with multithresholding

Configuration for a typical survey: detection

Optimizing SExtractor performance

Memory usage: SExtractor FIFO stacks

Known bugs and limitations

Future improvements

For more information…

Photometric measurements

Photometric measurements (2)

Photometric measurements (3)

Adaptive aperture photometry

Adaptive aperture photometry (2)

Adaptive aperture vs  isophotal photometry for faint galaxies

Adaptive aperture photometry (3)

Performance of Petrosian magnitudes in SDSS

Photometric measurements (4)

Photometric measurements (5)

Automatic star/galaxy classification

2 dimensional parameter-space for star/galaxy separation

Automatic classifiers

SExtractor’s neural network classifier

Automatic neural network classification

Stellarity parameter as a function of magnitude