Astronomy Archive

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New paper: Evolved Massive Stars at Low-metallicity I. A Source Catalog for the Small Magellanic Cloud

Posted July 17, 2019 By grigoris

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 […]

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The ASSESS group roster 2019

Posted June 27, 2019 By grigoris
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Astrostatistics Summer School Crete 2019 – last day

Posted June 21, 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. […]

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At the Supernova Remnants II conference – another session

Posted June 6, 2019 By grigoris

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

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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).

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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 […]

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Working with both Python 2 and 3 in jupyter

Posted January 16, 2019 By grigoris

I have followed the pip install approach to add everything that I wanted for Python. Even though I did the same for jupyter when I was starting it (“jupyter notebook”) it would only start the Python 2 kernel, although Python 3 “was there” but not active actually. After some digging I found that a similar […]

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Installing Debian on Lenovo Thinkpad Carbon X-1 (Gen 6)

Posted December 17, 2018 By grigoris

It is exciting to have a new machine, such the Lenovo Thinkpad X-1, but the process for setting it up can be a bit tedious. So this is a small guide what worked or didn’t through my small experience in installing Debian linux. [Just for the fun of it I proceeded with the installation of […]

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New paper on rho Cas and its recent outburst in 2013

Posted December 11, 2018 By grigoris

A new outburst of the yellow hypergiant star Rho Cas Michaela Kraus, Indrek Kolka, Anna Aret, Dieter H. Nickeler, Grigoris Maravelias, Tõnis Eenmäe, Alex Lobel, Valentina G. Klochkova Yellow hypergiants are evolved massive stars that were suggested to be in post-red supergiant stage. Post-red supergiants that evolve back to the blue, hot side of the […]

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