Seminar on extraction and processing of information present in astronomical images
Dr. René Duffard
In planetary science, and in small bodies studies, specifically, a wide variety of large databases are being generated from data obtained by different instruments, in different formats, on similar objects at different times or thousands of different objects over a number of years. In recent years only, catalogues of CCD optical observations from ground-based telescopes are published. Well known examples are the catalogues of moving objects from SLOAN, Gaia-DR2, Gaia-DR3, K2, TESS and several others.
We developed a tool, called M2, to extract and process the information on astronomical images in a fast way. The M2 tool has a set of capabilities using as input the calibrated astronomical images. It obtains the astrometry for all the sources present in the images (stars and small bodies) fitting the image WCS to increase the accuracy. Also, obtains the photometry for all the sources calculating the absolute and relative photometry of an asteroid/TNO. Then, calculates the light curve and rotational phase of an asteroid/TNO and locates all Gaia-DR3 sources (stars) present in an image and calculates its absolute and relative photometry. I will present preliminary results obtained by applying this software to several years of astronomical observations carried out by our research group.
All the results will be included in a database. A large interaction and synergies are expected with professional and amateur communities.
Date: 13th September 2023, 16h30