Astronomy Archive

New paper on evaluating outreach activities

Posted November 11, 2019 By grigoris

A short paper has been presented as a poster in the EPSC-DPS Joint Meeting 2019, held 15-20 September 2019 in Geneva, Switzerland. The data originate from a series of outreach activities performed by the Hellenic Amateur Astronomy Association, entitled “Introduction to Observational Astronomy“, which aimed to introduce interested individuals to the aspects of the observational […]

Conference contributions – summer 2019 edition

Posted November 8, 2019 By grigoris

Although the summer has finished long ago, only now I got some time to update on summer activities, i.e. a number of conferences I attended and contributed to. Since 2018, I have been working in an automated classifier for massive stars in nearby galaxies, using photometric datasets. These have been produced by my colleagues within […]

Master presentation by Elias Kyritsis

Posted September 30, 2019 By grigoris

Elias Kyritsis has been a student at the Physics Department of the University of Crete that I have co-supervised with Prof. Andreas Zezas since 2017. Initially as an undergraduate student he worked on the visual classification of High-Mass X-ray Binary sources in the Large Magellanic Cloud, but later on he decided to work on a […]

Evolved Massive Stars at Low-metallicity I. A Source Catalog for the Small Magellanic Cloud Ming Yang, Alceste Z. Bonanos, Bi-Wei Jiang, Jian Gao, Panagiotis Gavras, Grigoris Maravelias, Yi Ren, Shu Wang, Meng-Yao Xue, Frank Tramper, Zoi T. Spetsieri, Ektoras Pouliasis We present a clean, magnitude-limited (IRAC1 or WISE1 ≤ 15.0 mag) multiwavelength source catalog for […]

The ASSESS group roster 2019

Posted June 27, 2019 By grigoris

During the last four days I was busy with the actual materialization of the Astrostatistics Summer School Crete 2019, which took place at the University of Crete, in Heraklion (18-21 June 2019). My duties were mainly those of the Teaching Assistant and I contributed with a short presentation of the Random Forests method for classification. […]

During a session – from a galaxy far far away – at the Supernova Remnants II conference in Chania, Greece 2019 (photo/editing by A. Manousakis).

At the Supernova Remnants II conference

Posted June 5, 2019 By grigoris

Working and supporting the Supernova Remnants II conference in Chania, Greece 2019 (photo by A. Manousakis).

Fixing GPG error “NO_PUBKEY”

Posted March 28, 2019 By grigoris

In Debian, Ubuntu and similar distros that use the APT (Advanced Package Tool – which is a set of tools for managing Debian packages / applications), to update the system you need to run: sudo apt update This will read all repositories (as they are listed in /etc/apt/sources.list and under /etc/apt/sources.list.d/) and checks if everything […]