Society News Science News the Antikythera Mechanism Skinakas Observatory Spectroscopic Diagnostics of Galactic Nuclei Eclipsing Binaries
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Kythera Summer Edition 2018
KYTHERA Summer Edition 2018 FOUNDERρΙΔΡΥΤΗΣό ©METAXIA POULOS • PUBLISHERό DIMITRIS KYRIAKOPOULOS • EDITORό DEBORAH PARSONS • WRITERSό ELIAS ANAGNOSTOU, ANNA COMINOS, SALLY COMINOS-DAKIN, FIONA CUNNINGHAM, EVGENIA GIANNINI, DOMNA KONTARATOU, MARIA KOUKOULI, THEODOROS KOUKOULIS, DIMITRIS KOUTRAFOURIS, ALEXIA NIKIFORAKI, PIA PANARETOS, AGLAIA PAPAOICONOMOU, ASPASIA PATTY, DAPHNE PETROCHILOS, IPPOLYTOS PREKAS, YIANNIS PROTOPSALTIS, JOY TATARAKI, ELIAS TZIRITIS, NIKOS TSIOPE- LAS • ARTWORKό DAPHNE PETROHILOS• PHOTOGRAPHYό DIMITRIS BALTZIS, CHRISSA FATSEAS, VENIA KAROLIDOU, STEPHEN TRIFYLLIS, EVANGELOS TSIGARIDAS • PROOF READINGό PAULA CASSIMATIS, JOY TATARAKI • LAYOUT ζ DESIGNό MYRTO BOLOTA • EDITORIALρADVERTISINGξΣΥΝΤΑΞΗρΔΙΑΦΗΜΙΣΕΙΣό 69φφ-55σ7τς, e-mailό kse.σ99υ@yahoo.gr FREE COMMUNITY PAPER • ΕΛΛΗΝΟξΑΓΓΛΙΚΗ ΕΚΔΟΣΗ • ΑΝΕΞ ΑΡΤΗΤΗ ΠΟΛΙΤΙΣΤΙΚΗ ΕΦΗΜΕΡΙΔΑ • ΔΙΑΝΕΜΕΤΑΙ ΔΩΡΕΑΝ George & Viola Haros and family wish everyone a Happy Summer in Kythera Distributing quality food, beverage, cleaning and packaging products to the Foodservice Industry wwwοstgeorgefoodserviceοcomοau All the right ingredients Ανοιχτά από τις 9.00 π.μ. έως αργά το βράδυ για καφέ, μεζέ και φαγητό MYLOPOTAMOS Καλλιόπη Καρύδη τηλ.: 27360-33397 και όλα μέλι-γάλα pure Kytherian thyme honey τχςξγοατία ςξσ ΙΠΠΟΛΥΤΟΥ ΠΡΕΚΑ θυμαρίσιο μέλι αωορίαε! welcome! Κυθήρων Έλίπλίίωί“”ίμί’ίίίμίίΚξ ΜΗΤΑΤΑ Κύθηρα Ρίίίμίμωίμπωξ τηλ.: 27360-33010, 6978-350952, 6977-692745 Ωί:ίίΑίίΑμ ΤαίίJeanνAntoineίWatteauίίίΑπξ Έίίίπλίίίίίξ Σίίμίίίίίξί ηΗΛξΑΝξίσρς8θ What is it that has brought you to Aphrodite’s -
The Historical Review/La Revue Historique
The Historical Review/La Revue Historique Vol. 10, 2013 The Crisis of the Long 1850s and Regime Change in the Ionian State and the Kingdom of Greece Gekas Sakis https://doi.org/10.12681/hr.306 Copyright © 2013 To cite this article: Gekas, S. (2013). The Crisis of the Long 1850s and Regime Change in the Ionian State and the Kingdom of Greece. The Historical Review/La Revue Historique, 10, 57-84. doi:https://doi.org/10.12681/hr.306 http://epublishing.ekt.gr | e-Publisher: EKT | Downloaded at 02/10/2021 16:38:35 | The crisis of The long 1850s and regime change in The ionian sTaTe and The kingdom of greece Sakis Gekas abstract: The overthrow of king othon in 1862 and the decolonization of the ionian islands led to the unification of the ionian state with the kingdom of greece. This article argues that the multifaceted crisis of the long 1850s (1847-1862) created a crisis of legitimacy for both the British Protectorate and the othonian regime. The change of regime represents a case where an economic, social and political crisis set in motion a process of democratization and not the rise of an authoritarian regime (as in the 1930s). The argument balances socio-economic structuralist factors with the contingency of political action that determined the union of the two states; this regime change was the optimal and favoured solution and the way out of the legitimacy crisis for all actors involved. Introduction from the late 1840s to the early 1860s commercial downturn, financial instability, foreign occupation, cholera outbreaks and food riots engulfed the ionian state and the kingdom of greece. -
Project's User Guide
User guide Editors: Sofoklis Sotirou, Nikolaos Dalamagkas Artwork: Sylvia Pentheroudaki, Evaggelos Anastasiou Ellinogermaniki Agogi This edition is co-financed by European Commission Copyright 2006 by Ellinogermaniki Agogi All rights reserved Reproduction or translation of any part of this work without the written permission of the copyright owners is unlawful. Request for permission or further information should be addressed to the copyright owners. Printed by Epinoia S.A. 4 Contents For the user of the D-Space service p.7 Chapter 1 p.9 1 The D-Space project p.11 Chapter 2 p.15 2 Technical description of the D-Space service p.17 2.1 The D-Space network of robotic telescopes p.17 2.2 The D-Space user interface p.21 2.2.1 Go observing p.23 2.2.2 The D-Space Resource Center p.25 2.2.3 The D-Space Communication Area p.25 Chapter 3 p.27 3 Scenarios of use p.29 3.1 Scenarios of use in formal learning settings p.29 3.2 Scenarios of Use in informal learning settings p.31 Appendix p.37 References p.47 5 6 For the user of the D-Space service The Discovery Space (D-Space) project focuses on the educational use of a network of remotely controlled telescopes. The aim of this short guide is to support the teach- ers in using the service. This Guide aims also to help users (teachers, students, astronomers, visitors of sci- ence parks and museums) to use the D-Space service in the optimum way. -
Progress in Multi-Wavelength and Multi-Messenger Observations of Blazars and Theoretical Challenges
Article Progress in Multi-Wavelength and Multi-Messenger Observations of Blazars and Theoretical Challenges Markus Böttcher Centre for Space Research, North-West University, Potchefstroom 2520, South Africa; [email protected]; Tel.: +27-18-299-2418 Received: 6 November 2018; Accepted: 9 January 2019; Published: 18 January 2019 Abstract: This review provides an overview of recent advances in multi-wavelength and multi-messenger observations of blazars, the current status of theoretical models for blazar emission, and prospects for future facilities. The discussion of observational results will focus on advances made possible through the Fermi Gamma-Ray Space Telescope and ground-based gamma-ray observatories (H.E.S.S., MAGIC, VERITAS), as well as the recent first evidence for a blazar being a source of IceCube neutrinos. The main focus of this review will be the discussion of our current theoretical understanding of blazar multi-wavelength and multi-messenger emission, in the spectral, time, and polarization domains. Future progress will be expected in particular through the development of the first X-ray polarimeter, IXPE, and the installation of the Cherenkov Telescope Array (CTA), both expected to become operational in the early to mid 2020s. Keywords: active galaxies; blazars; multi-wavelength astronomy; muti-messenger astronomy; neutrino astrophysics; polarization 1. Introduction Blazars are the class of jet-dominated, radio-loud active galactic nuclei (AGN) whose relativistic jets point close to our line of sight. Due to this viewing geometry, all emissions from a region moving 2 −1/2 with Lorentz factor G ≡ (1 − bG) , where bGc is the jet speed, along the jet, at an angle qobs with −1 respect to our line of sight, will be Doppler boosted in frequency by a factor d = (G[1 − bG cos qobs]) and in bolometric luminosity by a factor d4 with respect to quantities measured in the co-moving frame of the emission region. -
Kaa Newsletter Tzeli April 2013:Layout 1.Qxd
KYTHERAIn search of and ANTIKYTHERA It’s printed and on the way from Greece! of May, just in time to take over for Kytherian A dedicated guide book on Kythera, in English. summer. Great for those visiting the island for Highly acclaimed professional photographer and the first time, or seasoned travellers wanting to travel writer, Tzeli Hadjidimitriou was the author get more out of their stay. Great for the and visual artist behind the Unexplored grandkids! Kythera & Antikythera guide book in Greek. A handheld guide book with 252 dedicated It’s probably the best selling book relating to pages on Kythera, available for $25 plus postage Kythera, ever. from the Kytherian Association of Australia, who The English version is called In Search of partly sponsored the book. Kythera & Antikythera and expected to be See www.kytherianassociation.com.au/books.html available for purchase in Australia from the end for more information. In search of Opposite the south eastern tip of the Greek Peloponnese pen- Tzeli Hadjidimitriou insula, the islands of Kythera and Antikythera have long been places of exile and pirate caves. They still remain resistant to the ferocious spread of mass tourism that’s marred many of the other Greek islands. Kythera, the island where Aphrodite was born, reveals its true essence to the reflective traveller. Walking misty tracks with KYTHERA long abandoned ruins, surrounded by calm or stormy seas, gen- tle breezes or forceful winds, visitors are led to hidden beaches and caves, tiny villages and historic monuments. A drift at sea, 38 kilometres from Kythera, lies the time forsaken island of Antikythera. -
Multi-Band Intra-Night Optical Variability of BL Lacertae
Article Multi-Band Intra-Night Optical Variability of BL Lacertae Haritma Gaur 1,*, Alok C. Gupta 2, Rumen Bachev 3, Anton Strigachev 3, Evgeni Semkov 3, Paul J. Wiita 4,5, Minfeng Gu 1 and Sunay Ibryamov 6 1 Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, China; [email protected] 2 Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263002, India; [email protected] 3 Institute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences, 72 Tsarigradsko Shosse Blvd., 1784 Sofia, Bulgaria; [email protected] (R.B); [email protected] (A.S); [email protected] (E.S) 4 Department of Physics, The College of New Jersey, P.O. Box 7718, Ewing, NJ 08628-0718, USA; [email protected] 5 Kavli Institute for Particle Astrophysics and Cosmology, SLAC, 2575 Sand Hill Rd, Menlo Park, CA 94025, USA 6 Department of Theoretical and Applied Physics, Faculty of Natural Sciences, University of Shumen, 115, Universitetska Str., 9712 Shumen, Bulgaria; [email protected] * Correspondence: [email protected] Received: 30 October 2017; Accepted: 5 December 2017; Published: 8 December 2017 Abstract: We monitored BL Lacertae frequently during 2014–2016 when it was generally in a high state. We searched for intra-day variability for 43 nights using quasi-simultaneous measurements in the B, V, R, and I bands (totaling 143 light curves); the typical sampling interval was about eight minutes. On hour-like timescales, BL Lac exhibited significant variations during 13 nights in various optical bands. -
Optical Counterpart to Swift J0243. 6+ 6124
Astronomy & Astrophysics manuscript no. ms c ESO 2020 September 23, 2020 Optical counterpart to Swift J0243.6+6124 P. Reig1, 2, J. Fabregat3, and J. Alfonso-Garzón4 1 Institute of Astrophysics, Foundation for Research and Technology-Hellas, 71110 Heraklion, Greece 2 Physics Department, University of Crete, 71003 Heraklion, Greece e-mail: [email protected] 3 Observatorio Astronómico, Universidad de Valencia, Catedrático José Beltrán 2, 46980 Paterna, Spain 4 Centro de Astrobiología-Departamento de Astrofísica (CSIC-INTA), Camino Bajo del Castillo s/n, 28692 Villanueva de la Cañada, Spain Received ; accepted ABSTRACT Context. Swift J0243.6+6124 is a unique system. It is the first and only ultra-luminous X-ray source in our Galaxy. It is the first and only high-mass Be X-ray pulsar showing radio jet emission. It was discovered during a giant X-ray outburst in October 2017. While there are numerous studies in the X-ray band, very little is known about the optical counterpart. Aims. Our aim is to characterize the variability timescales in the optical and infrared bands in order to understand the nature of this intriguing system. Methods. We performed optical spectroscopic observations to determine the spectral type. Long-term photometric light curves to- gether with the equivalent width of the Hα line were used to monitor the state of the circumstellar disk. We used BVRI photometry to estimate the interstellar absorption and distance to the source. Continuous photometric monitoring in the B and V bands allowed us to search for intra-night variability. Results. The optical counterpart to Swift J0243.6+6124 is a V = 12.9, O9.5Ve star, located at a distance of ∼ 5 kpc. -
The Herpetofauna of the Island of Kythera (Attica, Greece) (Amphibia; Reptilia)
Broggi_Kythera April 2014_hErPEToZoA.qxd 08.08.2016 10:20 seite 1 hErPEToZoA 29 (1/2): 37 - 46 37 Wien, 30. Juli 2016 The herpetofauna of the Island of Kythera (Attica, Greece) (Amphibia; reptilia) die herpetofauna der Insel Kythira (Attika, Griechenland) (Amphibia; reptilia) MArIo F. B roGGI KUrZFAssUnG die Insel Kythira ist Teil des südägäischen Inselbogens, der sich vor mehreren Millionen von Jahren bilde - te und von der Peloponnes-halbinsel über Kreta, Karpathos und rhodos nach Anatolien erstreckt. In seiner Pflan - zen- und Tierwelt hat Kythira viel mit dem Peloponnes gemeinsam. Bislang wurden etwa sechzehn Amphibien- und reptilienarten von der Insel beschrieben, die sich durch ihren Wasserreichtum, besonders im norden, aus - zeichnet. die vorliegende Arbeit trägt die verstreute Information zur herpetofauna von Kythira zusammen und erweitert sie durch eigene Beobachtungen. ABsTrACT The Island of Kythera lies in the southern Aegean arc of islands, which formed millions of years ago and extends from the Peloponnese Peninsula, Crete, Karpathos and rhodes to Anatolia. With regard to its flora and fauna, Kythera has much in common with the Peloponnese. To date, about six teen species of amphibians and rep - tiles were reported to occur on the island, which has abundant water resources, in the north especially. In this paper, the scattered information on the island’s herpetofauna is compiled and enriched by author’s observations. KEy Words Amphibia; reptilia; Testudo marginata , Caretta caretta , Algyroides moreoticus , new island record, faunis - tics, Island of Kythera, Greece InTrodUCTIon The Ionian Island of Kythera forms a consists of acid metamorphosed rock, but bridge between the Peloponnese Peninsula for the most part, it is of calcareous origin. -
Island Studies Journal, Vol. 12, No. 1, 2017, 71-94 Sustainable Local
Island Studies Journal, Vol. 12, No. 1, 2017, 71-94 Sustainable local development on Aegean Islands: a meta-analysis of the literature Sofia Karampela University of the Aegean, Mytilini, Greece [email protected] Charoula Papazoglou University of the Aegean, Mytilini, Greece [email protected] Thanasis Kizos University of the Aegean, Mytilini, Greece [email protected] and Ioannis Spilanis University of the Aegean, Mytilini, Greece [email protected] ABSTRACT: Sustainable local development is central to debates on socioeconomic and environmental change. Although the meaning of sustainable local development is disputed, the concept is frequently applied to island cases. Studies have recently been made of many local development initiatives in different contexts, with various methods and results. These experiences can provide valuable input on planning, managing, and evaluating sustainable local development on islands. This paper provides a literature review of positive and negative examples of sustainable local development for the Aegean Islands, Greece. Out of an initial 1,562 papers, 80 papers made the final selection based on theme, empirical approach, and recency. The results demonstrate a wide thematic variety in research topics, with tourism, agriculture, and energy being the most frequent themes, while integrated frameworks are largely absent. The literature includes a wide range of methods, from quantitative approaches with indicators and indexes to qualitative assessments, which blurs overall assessments in many instances. Keywords: Aegean islands, economy, environment, sustainable local development, meta-analysis https://doi.org/10.24043/isj.6 © 2017 – Institute of Island Studies, University of Prince Edward Island, Canada. 1. Introduction Sustainability and sustainable development are notions that are widely used today in areas of research, policies, monitoring, and planning (Spilanis et al., 2009). -
Kythera Trails
Becoming Smart(er) and (more) Sustainable Dimitris Bogiatzis LAG of Attica Islands } Founded in 2016 } Network of the 8 municipalities of Regional Unit of Attica islands: } Salamina } Agistri } Aegina } Trizinia } Poros } Hydra } Spetses } Kythera } and 11 local associations and groups } Enhances the co-operation among Municipalities, develops local and regional strategies, supports development actions } Manages the CLLD/Leader Program 2014-2020 with 7,400,000 € budget } Belongs to Region of Attica (Regional Unit of Attica Islands) } Consists of two islands: } Kythera (278 km², 17th largest in Greece), known also as “Cerigo” } Antikythera (20.43 km²), world known for the “Antikythera Mechanism” } Has a Population of 4.041 people: } 0-14 :532 (14.1%) } 15-65 : 2.119 (64,3%) } 65+ : 990 (21.7%) } But just ~25 in Antikythera! } Exist of 56 inhabited settlements, ranging from a few to a few hundreds of citizens } Economy based on Primary Sector (Agriculture & Fishing) and Tourism } Ageing population and migration of young people } The youth leaves for educational (Universities, colleges etc) and work opportunities } The elderly return after their retirement } Connection to mainland, cost of transport and lack of internal transportation } From October to May, connection is scarce } There is no public transport system on the island } Limited educational facilities } Although all basic facilities exist (from Pre- school to High School), there is lack of afterschool activities (like music, sports, dance, STEM etc) } Decreasing quality of water -
Source Parameters of Moderate and Strong Earthquakes in the Broader Area of Zakynthos Island (W
See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/257315427 Source parameters of moderate and strong earthquakes in the broader area of Zakynthos island (W. Greece) from regional and teleseismic digital recordings. Conference Paper in Bulletin of the Geological Society of Greece · May 2010 DOI: 10.12681/bgsg.11391 CITATIONS READS 3 67 5 authors, including: Konstantinos Chousianitis Apostolos Agalos National Observatory of Athens Ministry of Education, Greece 36 PUBLICATIONS 1,180 CITATIONS 39 PUBLICATIONS 195 CITATIONS SEE PROFILE SEE PROFILE E. Lagios Kostas Christou Makropoulos National and Kapodistrian University of Athens National and Kapodistrian University of Athens 118 PUBLICATIONS 1,143 CITATIONS 481 PUBLICATIONS 5,870 CITATIONS SEE PROFILE SEE PROFILE Some of the authors of this publication are also working on these related projects: HELPOS View project EPOS-GNSS, the GNSS component of EPOS (European Plate Observing System) View project All content following this page was uploaded by Konstantinos Chousianitis on 13 June 2014. The user has requested enhancement of the downloaded file. Δελτίο της Ελληνικής Γεωλογικής Εταιρίας, Bulletin of the Geological Society of Greece, 2010 2010 Πρακτικά 12ου Διεθνούς Συνεδρίου, Πάτρα, Proceedings of the 12th International Con- Μάιος 2010 gress, Patras, May, 2010 SOURCE PARAMETERS OF MODERATE AND STRONG EARTHQUAKES IN THE BROADER AREA OF ZAKYNTHOS ISLAND (W. GREECE) FROM REGIONAL AND TELESEISMIC DIGITAL RECORDINGS Chousianitis K.1, Agalos A. 1, Papadimitriou P. 1, Lagios E. 1 and Makropoulos K. 1 1 Department of Geophysics-Geothermics, National & Kapodistrian University of Athens, 15784 Panepistimiopolis – Greece, [email protected], [email protected], [email protected], [email protected], [email protected] Abstract The source parameters of all the moderate and strong events that occurred in the broader area of Zakynthos Island for the period 1997–2009 are determined using two different techniques depending on epicentral distance. -
Long-Term Variability of High-Mass X-Ray Binaries. I. Photometry? P
Astronomy & Astrophysics manuscript no. ms_charts c ESO 2018 October 16, 2018 Long-term variability of high-mass X-ray binaries. I. Photometry? P. Reig1; 2 and J. Fabregat3 1 IESL, Foundation for Research and Technology-Hellas, 71110, Heraklion, Greece 2 Physics Department, University of Crete, 71003, Heraklion, Greece e-mail: [email protected] 3 Observatorio Astronómico, Universidad de Valencia, E-46100 Burjassot, Spain Received ; accepted ABSTRACT We present photometric observations of the field around the optical counterparts of high-mass X-ray binaries. Our aim is to study the long-term photometric variability in correlation with their X-ray activity and derive a set of secondary standard stars that can be used for time series analysis. We find that the donors in Be/X-ray binaries exhibit larger amplitude changes in the magnitudes and colours than those hosting a supergiant companion. The amplitude of variability increases with wavelength in Be/X-ray binaries and remains fairly constant in supergiant systems. When time scales of years are considered, a good correlation between the X-ray and optical variability is observed. The X-rays cease when optical brightness decreases. These results reflect the fact that the circumstellar disk in Be/X-ray binaries is the main source of both optical and X-ray variability. We also derive the colour excess, E(B − V), selecting data at times when the contribution of the circumstellar disk was supposed to be at minimum, and we revisit the distance estimates. Key words. X-rays: binaries – stars: neutron – stars: binaries close –stars: emission line, Be 1.