Cosimo Nigro

I am Cosimo, I work as a postdoc at IFAE.
My main interests are developing scientific software for gamma-ray astronomy and studying the emission of Active Galactic Nuclei.

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Affiliation – Institut de Fisica d'Altes Energies (IFAE) Position – postdoc Github ID – cosimoNigro

Talks

agnpy: numerical modelling of AGN spectra in python

Built on numpy and astropy, agnpy allows to compute the spectral energy distribution (SED) produced by the radiative processes of relativistic electrons accelerated in the jets of Active Galactic Nuclei.
The photon emission via synchrotron and inverse Compton radiation can be computed for a population of particles confined in a spheroidal emission region (blob). While the radiation field of several AGN components (Accretion Disk, Broad Line Region, Dust Torus, the very same synchrotron radiation) can be selected as target for the inverse Compton, the gamma-gamma pair-production opacity of the latter can be simultaneously estimated.
agnpy provides an important missing piece in the field of blazar modelling and in the growing community of python-based astronomical software.

Standardisation of Data Formats in Gamma-ray astronomy

The operation of the next-generation of gamma-ray telescopes as observatories poses gamma-ray astronomers the issue of opening their data and software to a wider community.
A first attempt at defining a common scheme for high-level gamma-ray astronomical data has been initiated by members of different Imaging Atmospheric Cherenkov Telescopes (IACT) experiments with the "Data formats for gamma-ray astronomy" forum (
https://gamma-astro-data-formats.readthedocs.io/en/latest/).
The forum, consisting of a series of documentation pages hosted on git, defines specifications to reduce high-level gamma-ray data to lists of candidate photons and instrument response function, stored in FITS files.
Open-source softwares for gamma-ray analyses have recently developed to support this format and, as a result, a series of publications relying on standardised datasets and software have been recently issued, among them:
- The first public release of H.E.S.S. data (https://arxiv.org/abs/1810.04516);
- the first reproducible multi-instrument analysis of the Crab Nebula (https://arxiv.org/abs/1903.06621);
- an analysis of the H.E.S.S. data with the open-source software ctools (https://arxiv.org/abs/1910.09456);
- a validation of open-source gamma-ray analysis software employing the same dataset (https://arxiv.org/abs/1910.08088).

This talk will provide a discussion on the standardisation effort and an overview of the projects that have already employed it.