Event Horizon Telescope Campaign
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Photographing Black Holes with the Event Horizon Telescope - Past, Present and Future
Photographing Black Holes with the Event Horizon Telescope - Past, Present and Future - Kazu Akiyama MIT Haystack Observatory The Shadow of a Black Hole BH ~5.2 Rs Rs = 2GMBH/c2 (Hilbert 1916) Credit: Hung-Yi Pu Kazu Akiyama, NEROC Symposium 2020, Online, 2020/11/17 (Tue) Event Horizon Telescope Kazu Akiyama, NEROC Symposium 2020, Online, 2020/11/17 (Tue) Event Horizon Telescope Sgr A* EHT 50μas Credit: Hotaka Shiokawa M87 EHT 40μas Credit: Monika Moscibrodzka Kazu Akiyama, NEROC Symposium 2020, Online, 2020/11/17 (Tue) Units of the Angular Size Protractor:1 ticks = 1 degree x 1/60 = 1 arcmin x 1/60 = 1 arcsec x 1/1000 = 1 mas x 1/1000 = 1 μas 0.5 deg 30 arcmin 40 - 50 μas Kazu Akiyama, NEROC Symposium 2020, Online, 2020/11/17 (Tue) Event Horizon Telescope Collaboration >300 members, >59 institutes, >18 countries in North & South America, Europe, Asia, and Africa. Kazu Akiyama, NEROC Symposium 2020, Online, 2020/11/17 (Tue) Meet the Telescope SMT, Arizona LMT, Mexico IRAM 30m Spain APEX, Chile JCMT, Hawaii Photos: ALMA, Sven Dornbusch, Junhan Kim, Helge Rottmann, David Sanchez, Daniel Michalik, Jonathan Weintroub, William Montgomerie Meet the Telescope Photos: ALMA, Sven ALMA, Chile Dornbusch, Junhan Kim, Helge Rottmann, David Sanchez, Daniel Michalik, Jonathan Weintroub, William Montgomerie SPT, South Pole SMA, Hawaii From Observations to Images Kazu Akiyama, NEROC Symposium 2020, Online, 2020/11/17 (Tue) Credit: Lindy Blackburn EHT Hardware EHT Backend (R2DBE, Mark 6) Recording Rate: - VLBA, GMVA: 2-4 Gbps - EHT: 32 Gbps (2017), 64 Gbps (2018-) Kazu Akiyama, NEROC Symposium 2020, Online, 2020/11/17 (Tue) From Observations to Images MIT Haystack Observatory 8 TB x 8 HDD (x 92 modules) Credit: Bryce Vickmark Credit: Lindy Blackburn Kazu Akiyama, NEROC Symposium 2020, Online, 2020/11/17 (Tue) Data Calibration HOPS Pipeline (EHT-HOPS) CASA Pipeline (rPICARD) EHT AIPS Pipeline Blackburn et al. -
Mr. Jeffery Morehouse Executive Director, Bring Abducted Children Home and Father of a Child Kidnapped to Japan
Mr. Jeffery Morehouse Executive Director, Bring Abducted Children Home and Father of a Child Kidnapped to Japan House Foreign Affairs Committee Monday, December 10, 2018 Reviewing International Child Abduction Thank you to Chairman Smith and the committee for inviting me here to share my expertise and my personal experience on the ongoing crisis and crime of international parental child abduction in Japan. Japan is internationally known as a black hole for child abduction. There have been more than 400 U.S. children kidnapped to Japan since 1994. To date, the Government of Japan has not returned a single American child to an American parent. Bring Abducted Children Home is a nonprofit organization dedicated to the immediate return of internationally abducted children being wrongfully detained in Japan and strives to end Japan's human rights violation of denying children unfettered access to both parents. We also work with other organizations on the larger goal of resolving international parental child abduction worldwide. We are founding partners in The Coalition to End International Parental Child Abduction uniting organizations to work passionately to end international parental kidnapping of children through advocacy and public policy reform. At the beginning of this year The G7 Kidnapped to Japan Reunification Project formed as an international alliance of partners who are parents and organizations from several countries including Canada, France, Germany, Italy, Japan, the United Kingdom, and the United States. The objective is to bring about a rapid resolution to this crisis affecting the human rights of thousands of children abducted to or within Japan. Many Japanese citizens and officials have shared with me that they are deeply ashamed of these abductions and need help from the U.S. -
"Seeing a Black Hole" the First Image of a Black Hole from the Event Horizon Telescope
"Seeing a Black Hole" The First Image of a Black Hole from the Event Horizon Telescope Matthew Newby Temple University Department of Physics May 1, 2019 "Seeing a Black Hole" The First Image of a Black Hole from the Event Horizon Telescope ● Black Holes – a Background ● Techniques to observe M87* ● Implications Matthew Newby, Temple University, May 1, 2019 2 "Seeing a Black Hole" Matthew Newby, Temple University, May 1, 2019 3 What is a black hole? Classical escape velocity: Let vesc → c, and the escape velocity is greater than the speed of light → “Black” Matthew Newby, Temple University, May 1, 2019 4 In General Relativity Einstein (and Hilbert) Field Equation Metric tensor Stress-energy tensor Ricci curvature tensor Scalar curvature “Solution” (“source” term) Matthew Newby, Temple University, May 1, 2019 5 Schwarzschild Metric Spherically symmetric, isolated, vacuum solution: Constant rs Schwarzschild Radius: Looks like classical escape velocity! Matthew Newby, Temple University, May 1, 2019 6 Space-Time Interval ● τ is proper time ● t is time measured at infinity (τ∞) ● r, θ, φ, are Schwarzschild spherical coordinates (i.e., coordinates as viewed at infinity) ● ds is a path element in spacetime Matthew Newby, Temple University, May 1, 2019 7 General Relativistic Time Dilation Allow a photon emitted at r to travel to infinity; in that photon’s rest frame: Since the frequency of a photon is a proper time interval, this implies that the photon’s frequency (and energy) are lower as it travels away from a spherical mass. Matthew Newby, Temple University, May 1, 2019 8 The Event Horizon rs is the “Surface of infinite redshift” or event horizon The event horizon is the “surface” of a black hole. -
Volunteer Handbook
VOLUNTEER MANUAL http://wku.edu/hardinplanetarium 270 – 745 – 4044 Volunteer Positions [email protected] [email protected] Audience Assistant 6 [email protected] mailing address: Tech Operator 10 1906 College Heights Blvd. Suspendisse aliquam mi Bowling Green, KY 42101-1077 placerat sem. Vestibulum mapping address: idProduction lorem commodo Assistant justo 12 1501 State Street, Bowling Green, KY euismod tristique. Suspendisse arcu libero, Mission: euismodPresenter sed, tempor id, 12 Hardin Planetarium’s mission is to inspire lifelong facilisis non, purus. learning through interactive experiences that are both Aenean ligula. inspiring and factually accurate. Our audiences will be Behind the Scenes 12 encouraged to engage with exhibits and live presentations that further the public understanding and enjoyment of science. Every member or our audience deserves to be treated with respect. We do everything possible to create Appendices an atmosphere where each person can enjoy her/himself and learn as much as possible. Set up / shut down 13 History: An iconic architectural landmark at Western Kentucky University, Hardin Planetarium was dedicated in October Star Stories set up 15 1967. The dome shaped building is 72-feet in diameter and 44 feet high. The interior includes two levels encompassing 6,000 square feet. The star chamber seats Emergency Procedures 16 over 100 spectators on upholstered benches arranged concentrically around the central projector system. Digitarium 16 The planetarium is named for Hardin Cherry Thompson quick-start guide [1938-1963], son of WKU president Kelly Thompson, who died during his senior year at the University. In 2012, audiences at Hardin Planetarium first enjoyed the power Volunteer Agreement 17 of full dome digital simulations, when the projection system was re-outfitted with a Digitalis Epsilon digital projector. -
Orbit-ALA Sampler 2021.Indd
ALA ANNUAL EXCLUSIVE SAMPLER 7/20/21 8/17/21 9/8/21 Notes from the Wildwood Whispers The Seven Visitations Burning Age Willa Reece of Sydney Burgess Claire North Redhook • pg. 17 Andy Marino Orbit • pg. 2 Redhook • pg. 27 9/21/21 10/19/21 10/26/21 The Body Scout Sistersong Far from the Light Lincoln Michel Lucy Holland of Heaven Orbit • pg. 38 Redhook • pg. 46 Tade Thompson Orbit • pg. 55 WWW.ORBITBOOKS.NET Chapter 1 Yue was twelve when she saw the kakuy of the forest, but later she lied and said she saw only fl ame. “Keep an eye on Vae!” hollered her aunty from her workshop door. “Are you listening to me?” It was the long, hot summer when children paddled barefoot in the river through the centre of Tinics, a time for chasing but- terfl ies and sleeping beneath the stars. School was out, and every class had found the thing that was demonstrably the best, most impressive thing to do. For the tenth grades about to take their aptitudes, it was cycling down the path from the wind farm head fi rst, until they either lost their courage or their bikes fl ipped and they cartwheeled with bloody knees and grazed elbows. For the seventh, it was preparing their kites for the fi ghting season; the ninth were learning how to kiss in the hidden grove behind the compression batteries, and to survive the fi rst heartbreak of a sixty- second romance betrayed. Yue should have been sitting on grassy roofs with her class, making important pronouncements about grown- up things, now that she was twelve and thus basically a philosopher- queen. -
An Unprecedented Global Communications Campaign for the Event Horizon Telescope First Black Hole Image
An Unprecedented Global Communications Campaign Best for the Event Horizon Telescope First Black Hole Image Practice Lars Lindberg Christensen Colin Hunter Eduardo Ros European Southern Observatory Perimeter Institute for Theoretical Physics Max-Planck Institute für Radioastronomie [email protected] [email protected] [email protected] Mislav Baloković Katharina Königstein Oana Sandu Center for Astrophysics | Harvard & Radboud University European Southern Observatory Smithsonian [email protected] [email protected] [email protected] Sarah Leach Calum Turner Mei-Yin Chou European Southern Observatory European Southern Observatory Academia Sinica Institute of Astronomy and [email protected] [email protected] Astrophysics [email protected] Nicolás Lira Megan Watzke Joint ALMA Observatory Center for Astrophysics | Harvard & Suanna Crowley [email protected] Smithsonian HeadFort Consulting, LLC [email protected] [email protected] Mariya Lyubenova European Southern Observatory Karin Zacher Peter Edmonds [email protected] Institut de Radioastronomie de Millimétrique Center for Astrophysics | Harvard & [email protected] Smithsonian Satoki Matsushita [email protected] Academia Sinica Institute of Astronomy and Astrophysics Valeria Foncea [email protected] Joint ALMA Observatory [email protected] Harriet Parsons East Asian Observatory Masaaki Hiramatsu [email protected] Keywords National Astronomical Observatory of Japan Event Horizon Telescope, media relations, [email protected] black holes An unprecedented coordinated campaign for the promotion and dissemination of the first black hole image obtained by the Event Horizon Telescope (EHT) collaboration was prepared in a period spanning more than six months prior to the publication of this result on 10 April 2019. -
Introduction to Black Hole Entropy and Supersymmetry
Introduction to black hole entropy and supersymmetry Bernard de Wit∗ Yukawa Institute for Theoretical Physics, Kyoto University, Japan Institute for Theoretical Physics & Spinoza Institute, Utrecht University, The Netherlands Abstract In these lectures we introduce some of the principles and techniques that are relevant for the determination of the entropy of extremal black holes by either string theory or supergravity. We consider such black holes with N =2andN =4 supersymmetry, explaining how agreement is obtained for both the terms that are leading and those that are subleading in the limit of large charges. We discuss the relevance of these results in the context of the more recent developments. 1. Introduction The aim of these lectures is to present a pedagogical introduction to re- cent developments in string theory and supergravity with regard to black hole entropy. In the last decade there have been many advances which have thoroughly changed our thinking about black hole entropy. Supersymmetry has been an indispensable ingredient in all of this, not just because it is an integral part of the theories we consider, but also because it serves as a tool to keep the calculations tractable. Comparisons between the macroscopic and the microscopic entropy, where the latter is defined as the logarithm of the degeneracy of microstates of a certain brane or string configuration, were first carried out in the limit of large charges, assuming the Bekenstein- Hawking area law on the macroscopic (supergravity) side. Later on also subleading corrections could be evaluated on both sides and were shown to be in agreement, although the area law ceases to hold. -
Feature Extraction on Synthetic Black Hole Images
Feature Extraction on Synthetic Black Hole Images Joshua Yao-Yu Lin 1 George N. Wong 1 Ben S. Prather 1 Charles F. Gammie 1 2 3 Abstract 80 80 The Event Horizon Telescope (EHT) recently re- 60 60 leased the first horizon-scale images of the black 40 40 hole in M87. Combined with other astronomical 20 20 data, these images constrain the mass and spin of as 0 0 the hole as well as the accretion rate and magnetic µ 20 20 flux trapped on the hole. An important question − − 40 40 for EHT is how well key parameters such as spin − − 60 60 and trapped magnetic flux can be extracted from − − 80 80 − 75 50 25 0 25 50 75 − 75 50 25 0 25 50 75 present and future EHT data alone. Here we ex- − − − − − − plore parameter extraction using a neural network µas µas trained on high resolution synthetic images drawn from state-of-the-art simulations. We find that the Figure 1. Synthetic image examples. Left panel: full resolution neural network is able to recover spin and flux simulated black hole image based on numerical model of black with high accuracy. We are particularly interested hole accretion flow with M87-like parameters. Right panel: the in interpreting the neural network output and un- same simulated image convolved with 20µas FWHM Gaussian derstanding which features are used to identify, beam meant to represent the resolving power of the EHT. e.g., black hole spin. Using feature maps, we find that the network keys on low surface brightness with data from other sources, the EHT images constrain features in particular. -
Statement of MARIA A. PALLANTE UNITED STATES REGISTER OF
Statement of MARIA A. PALLANTE UNITED STATES REGISTER OF COPYRIGHTS AND DIRECTOR OF THE U.S. COPYRIGHT OFFICE BEFORE THE COMMITTEE ON THE JUDICIARY United States House of Representatives “THE REGISTER’S PERSPECTIVE ON COPYRIGHT REVIEW” April 29, 2015 Statement of MARIA A. PALLANTE UNITED STATES REGISTER OF COPYRIGHTS AND DIRECTOR OF THE U.S. COPYRIGHT OFFICE BEFORE THE COMMITTEE ON THE JUDICIARY United States House of Representatives “THE REGISTER’S PERSPECTIVE ON COPYRIGHT REVIEW” April 29, 2015 Chairman Goodlatte, Ranking Member Conyers, and Members of the Judiciary Committee: It is a great honor to appear before you again to discuss issues of copyright law and copyright administration. My staff and I wish to thank you for the attention this Committee has invested in reviewing the Copyright Act and related provisions of Title 17 during the past two years. During this time, you convened twenty hearings and traversed the formidable span of Title 17. This represents the most comprehensive focus on copyright issues in over four decades. I. BACKGROUND AND THEMES Although copyright law has grown more legally complex and economically important in recent years, Congress is uniquely positioned to sort through the many competing equities that comprise the public interest in this modern era.1 Questions include: how best to secure for authors the exclusive rights to their creative works; how to ensure a robust copyright marketplace; how to craft essential exceptions, safe harbors, and limitations; and how to provide appropriate direction, oversight, and regulation. This balancing act is not 1The United States Congress is not alone in this undertaking. -
CSUF Alumni Association Newsletter
Summer Days are here again Titans! | View as webpage Alumni Impact Titans Reach Higher, and our Titan students need us. CSUF Alumni must band together to help our current students succeed in their academic journey and prepare for the increasingly competitive market. Also, as Titan alumni, we must help each other continue to grow no matter what career level. If you can get involved with your alma mater, CSUF, through time, talent or treasure, get in touch with us! Get involved! Donate Volunteer Corps Titan Pro Network Professional Clothing Drive Help our students prepare for the job search by donating lightly worn or new professional clothes. Plan on dropping off dry cleaned items at the Golleher Alumni House, M-F: 9 a.m. – 4 p.m./ Saturday, September 21st from 10 a.m. – 1 p.m. Want to help beyond clothes? We're looking for folks to help with resume and cover letter reviews. Contact our Student Outreach Coordinator Justine Budisantoso ([email protected]) if you would like to volunteer or have any questions. Alumni News Opera Baritone Jubilant Sykes, ’79, Leads Master Class Jubilant Sykes visited CSUF recently and lead a master class for opera students. As a Cal State Fullerton alum, he’s always willing to help current students whether through a master class or offering career advice. As one of opera’s most renowned baritones, Sykes has played venues across the world but doesn't forget what it’s like to break into the world of music. Read More Chemistry Grad Receives Outstanding Thesis Award for Fuel Cell Research Omar Muneeb's ’16, persistence and passion for research led to the development of the first fuel cell of its kind — one powered by vitamin C mixed in an alkaline solution. -
Reasons for Lack of Diversity in Open Source: the Case Katie Bouman
Reasons for lack of diversity in open source: The case Katie Bouman Lina Wang and Kristina Weinberger February 9, 2020 1 Introduction Open Source communities face similar problems with diversity as other areas of Computer Science. In this paper, we aim to take a look at the current situation and why diversity matters. Then, we discuss the relatively recent events around Katie Bouman and the first picture of a Black Hole as an example for some of the possible reasons for a lack of women. This is followed by an overview of other common issues that may contribute to imbalances in Open Source contributions. Finally, we spend some time looking at positive developments and initiatives aimed at bringing in more diversity. 1.1 Current Status of Diversity in Open Source It is well known that women and other minority groups tend to be underrepresented in computer science in general. This lack of diversity also extends into open source projects. According to a survey among more than 5000 randomly selected github1 users, more than 90% of all contributors to open source projects identify as male, while only around 3% identify as female [24]. The survey results show a lower percentage of women, non-binary people and racial minorities than present in the wider area of computer science [7], which is already well below the general population. While this survey only shows a narrow slice of the entire open source community and other communities around free and open technologies, it is reasonable to expect a relative lack of women and other minorities overall. -
Proof of Paternity, the History
PROOF OF PATERNITY : THE HISTORY A thesis submitted to The University of Manchester for the degree of Master of Philosophy in the Faculty of Humanities Year of Submission 2012 Susan Vipont Hartshorne School of Law Proof of Paternity : The History CONTENTS Abstract ….. ….. page 3 Declaration and Copyright Statement 4 Introduction …. …. 5 Chapter 1 a) The Burden of Illegitimacy ….. 10 b) The Presumption of Legitimacy .…. 18 c) The Presumption of Incapacity ….. 25 Chapter 2 – Quasi-Medical Evidence a) Sterility and Impotence …. 31 b) The Period of Gestation …. 34 c) Anthropological Tests …. 39 d) Contraception …. 41 Chapter 3 – Blood Test Evidence a) Blood Tests : 1900 to 1939 …. 45 The Bastardy (Blood Tests) Bill 1938/9 b) Blood Tests : 1940 to 1961 …. 59 The Affiliation Proceedings (Blood Tests) Bill 1961 c) Blood Tests : 1961 to 1972 …. 74 Chapter 4 – Legislation at last a) The Law Commissioners’ Report on Blood Tests and the Proof of Paternity in Civil Proceeding, and The Family Law Reform Bill …. 94 b) The Family Law Reform Act 1969 (Part III) 101 c) A 1974 survey of the use of blood test evidence 117 Chapter 5 – Working Towards Certainty …. 127 a) Blood Tests 1973 to 1987 …. 129 b) Artificial Insemination …. 134 d) DNA Fingerprinting …. 142 e) The Family Law Reform Act 1987 …. 146 Appendices …. …. 151 Bibliography …. …. 155 Word Count: 56,781 2 A thesis submitted to The University of Manchester for the degree of Master of Philosophy in the Faculty of Humanities in 2012 by Susan Vipont Hartshorne Proof of Paternity : The History ABSTRACT This thesis traces the history of the various methods that have been used to try to prove paternity in England – from earliest times up to the implementation of the Family Law Reform Act 1987.