RADIO ASTRONOMY OBERVTORY Quarterly Report CHARLOTTESVILLE, VA
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BRAS Newsletter August 2013
www.brastro.org August 2013 Next meeting Aug 12th 7:00PM at the HRPO Dark Site Observing Dates: Primary on Aug. 3rd, Secondary on Aug. 10th Photo credit: Saturn taken on 20” OGS + Orion Starshoot - Ben Toman 1 What's in this issue: PRESIDENT'S MESSAGE....................................................................................................................3 NOTES FROM THE VICE PRESIDENT ............................................................................................4 MESSAGE FROM THE HRPO …....................................................................................................5 MONTHLY OBSERVING NOTES ....................................................................................................6 OUTREACH CHAIRPERSON’S NOTES .........................................................................................13 MEMBERSHIP APPLICATION .......................................................................................................14 2 PRESIDENT'S MESSAGE Hi Everyone, I hope you’ve been having a great Summer so far and had luck beating the heat as much as possible. The weather sure hasn’t been cooperative for observing, though! First I have a pretty cool announcement. Thanks to the efforts of club member Walt Cooney, there are 5 newly named asteroids in the sky. (53256) Sinitiere - Named for former BRAS Treasurer Bob Sinitiere (74439) Brenden - Named for founding member Craig Brenden (85878) Guzik - Named for LSU professor T. Greg Guzik (101722) Pursell - Named for founding member Wally Pursell -
Galaxy Clusters in Radio → Non-Thermal Phenomena
GalaxyGalaxy ClustersClusters inin radioradio ÎÎ NonNon--thermalthermal phenomenaphenomena Luigina Feretti Istituto di Radioastronomia CNR Bologna, Italy Tonanzintla, GH2005, 4-5 July 2005 Lecture 4 : Radio emission from cluster galaxies: Classical radio galaxies Radio – X-ray interaction Distorted structures: NAT and WAT Radio galaxies filling X-ray cavities Confinement : Trigger of radio emission: radio luminosity function Enhancement of star formation RadiogalaxiesRadiogalaxies X-ray:X-ray: ThermalThermal ggasas Radio:Radio: AA 119119 (z(z == 0.0441)0.0441) RadioRadio GalaxiesGalaxies PerseusPerseus X-rayX-ray ROSAROSATT PSPCPSPC HotHot gasgas NGC 1265 RadioRadio WSRTWSRT 4949 cmcm RadioRadio galaxiesgalaxies NGC 1275 IC310 RadioRadio galaxiesgalaxies ooff highhigh andand lowlow ppowerower havehave quitequite differentdifferent morphologiesmorphologies onon thethe largelarge scalescale (Fanaroff(Fanaroff && RileyRiley 11974)974) CygCyg AA FRFR IIII 24.24.55 -1-1 HighHigh popowewer:r: PP1.41.4 GHzGHz >> 1010 WW HzHz 3C3C 444499 24.524.5 -1-1 LowLow power:power: PP1.41.4 GHzGHz << 1010 WW HzHz FRFR II RADIORADIO GALAXIESGALAXIES ATAT INCREASINGINCREASING RADIORADIO POWERPOWER 1024 W Hz-1 at 1.4 GHz 3C 31 DA 240 4C 73.08 1026.5 W Hz-1 From Atlas of P.Leahy, powers computed With H0=75, q0=0.5 Owen and Ledlow 1994 TheThe radioradio emissionemission fromfrom INDIVIDUALINDIVIDUAL GALAXIESGALAXIES isis foufoundnd ttoo extendextend WELLWELL BEYONDBEYOND thethe physicalphysical sizesize ofof thethe hosthost opticaloptical galaxygalaxy (>(> oror -
The Type II-Plateau Supernova 2017Eaw in NGC 6946 and Its Red Supergiant Progenitor
The Astrophysical Journal, 875:136 (23pp), 2019 April 20 https://doi.org/10.3847/1538-4357/ab1136 © 2019. The American Astronomical Society. All rights reserved. The Type II-plateau Supernova 2017eaw in NGC 6946 and Its Red Supergiant Progenitor Schuyler D. Van Dyk1 , WeiKang Zheng2 , Justyn R. Maund3 , Thomas G. Brink2, Sundar Srinivasan4,5, Jennifer E. Andrews6, Nathan Smith6, Douglas C. Leonard7, Viktoriya Morozova8 , Alexei V. Filippenko2,9 , Brody Conner10, Dan Milisavljevic10 , Thomas de Jaeger2, Knox S. Long11,12 , Howard Isaacson2 , Ian J. M. Crossfield13, Molly R. Kosiarek14,21 , Andrew W. Howard15 , Ori D. Fox11 , Patrick L. Kelly16 , Anthony L. Piro17 , Stuart P. Littlefair3 , Vik S. Dhillon3,18, Richard Wilson19, Timothy Butterley19, Sameen Yunus2, Sanyum Channa2, Benjamin T. Jeffers2, Edward Falcon2, Timothy W. Ross2, Julia C. Hestenes2, Samantha M. Stegman2, Keto Zhang2, and Sahana Kumar2,20 1 Caltech/Spitzer Science Center, Caltech/IPAC, Mailcode 100-22, Pasadena, CA 91125, USA 2 Department of Astronomy, University of California, Berkeley, CA 94720-3411, USA 3 Department of Physics and Astronomy, University of Sheffield, Hicks Building, Hounsfield Road, Sheffield S3 7RH, UK 4 Institute of Astronomy & Astrophysics, Academia Sinica, 11F, Astronomy-Mathematics Building, No. 1, Roosevelt Rd, Sec 4, Taipei 10617, Taiwan, Republic of China 5 Instituto de Radioastronomía y Astrofísica, Universidad Nacional Autonóma de México, Antigua Carretera a Pátzcuaro # 8701 Ex-Hda., San José de la Huerta, Morelia, Michoacán, C.P. 58089, Mexico -
Hubble Space Telescope Images of the Ultraluminous Supernova Remnant Complex in NGC 6946 William P
CORE Metadata, citation and similar papers at core.ac.uk Provided by Dartmouth Digital Commons (Dartmouth College) Dartmouth College Dartmouth Digital Commons Open Dartmouth: Faculty Open Access Articles 3-2001 Hubble Space Telescope Images of the Ultraluminous Supernova Remnant Complex in NGC 6946 William P. Blair Johns Hopkins University Robert A. Fesen Dartmouth College Eric M. Schlegel Harvard-Smithsonian Center for Astrophysics Follow this and additional works at: https://digitalcommons.dartmouth.edu/facoa Part of the Stars, Interstellar Medium and the Galaxy Commons Recommended Citation Blair, William P.; Fesen, Robert A.; and Schlegel, Eric M., "Hubble Space Telescope Images of the Ultraluminous Supernova Remnant Complex in NGC 6946" (2001). Open Dartmouth: Faculty Open Access Articles. 2227. https://digitalcommons.dartmouth.edu/facoa/2227 This Article is brought to you for free and open access by Dartmouth Digital Commons. It has been accepted for inclusion in Open Dartmouth: Faculty Open Access Articles by an authorized administrator of Dartmouth Digital Commons. For more information, please contact [email protected]. THE ASTRONOMICAL JOURNAL, 121:1497È1506, 2001 March ( 2001. The American Astronomical Society. All rights reserved. Printed in U.S.A. HUBBL E SPACE T EL ESCOPE IMAGES OF THE ULTRALUMINOUS SUPERNOVA REMNANT COMPLEX IN NGC 69461 WILLIAM P. BLAIR Department of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218-2686; wpb=pha.jhu.edu ROBERT A. FESEN -
Yankee Digital Dandy
EQUIPMENT REVIEW Yankee Robotics’ new CCD camera combines maximum sensitivity, low noise, and a great price. /// BY BOB FERA Yankee digital dandy The field of advanced charge-coupled device (CCD) imaging is dominated by high-quality instruments from a few well-known manufacturers, such as Santa Barbara Instruments Group (SBIG), Finger Lakes Instrumentation (FLI), and Starlight Express. Recently, a new player entered the sures 18mm by 27mm, a game with a unique approach to CCD- USB-2.0 interface, and a camera design. That company, Yankee lifetime warranty. Robotics of San Diego, has introduced its Unlike some systems, Trifid-2 line of cameras and is aiming the Trifid-2 does not come directly at the big boys. with either a filter wheel I tested Yankee’s top-of-the-line model, or an onboard guiding which features Kodak’s KAF-6303E CCD chip. Using the camera detector, to see if it measures up to the thus requires purchasing competition. It does. and integrating a third- The first thing prospective customers party filter wheel from a will notice about the Trifid-2 is the price, company such as FLI or Optec, which, at $6,895 (with the Class 2 imaging Inc. Also, you’ll need an off-axis chip), is thousands of dollars less than com- guider or a guide scope with a dedicated petitors’ cameras equipped with the same autoguider, such as SBIG’s ST-4, ST-V, or THE TRIFID-2 CCD camera houses a 6- 6-megapixel KAF-6303E detector. What ST-402ME. But, even after adding in these megapixel Kodak KAF-6303E CCD chip. -
Extragalactic Astronomy: the U Nivcre Bey Nd Our Galaxy
U1IJT RESUPE EU 1J3 199 021 775 dacon Eenneth Char TITLE Extragalactic Astronomy: The U nivcre Bey nd Our Galaxy. American Astronomical Society, Princeton, N.J. SFONS AGENCY National Aeronautics and Space Administra ashingtonl D.C.; National Science Foundation, Washington, D.C. REPOBT NO NASA-i:T-129 PUB DATE Sep 76 NOTE 44p.; FOF ltEd aocunents, _e SE 021 773-776 AVAII,AULE Superintendent of Documents, U.S. G-vernment Prin ing Office, Washington, D.C. 20402(5 ock Number 033-000-00657-8, $1.30) E.-RS PE10E 1F-$0.03 HC-$2.06 Plus Postige. DESCilIPTORS *Astronomy; Curriculum; *Instructional Materials; Science Education; *Scientific iesearch; Secondary Education; *Secondary School Science; *Space Sciences TIF NASA; National Aeronautics and Space Administration BSTRACT This booklet is part of an American Astronomical Society curriculum project designed to provide teaching materials to teachers or secondary school chemistry, physics, and earth science. The material is presented in three parts: one section provides the fundamental content of extragalactic astronomy, another section discusses modern discoveries in detail, and the last section summarizes the earlier discussions within the structure of the Big Bang Theory of Evolution. Each of the three sections is followed by student exercises and activities, laboratory projects, and questions and answers. The glossary contains unfamiliar terms used in the text and a collection of teacher aids such as literature references and audiovisual materials. (111) ***** *** * ** ** ***************** ********** Document., acquired by IC include many informal unpublished aterials not available from other sources. ERIC makes every effort * * to obtain the best copy available. Nevertheless, items of marginal * * reproducibility are often encountered and tbis affects the quality * * of the microfiche and hardcopy reproductions ERIC makes available * * via the ERIC Document Reproduction Service (EDRS). -
A Search for Supernova Light Echoes in NGC 6946 with SITELLE a Search for Supernova Light Echoes in NGC 6946 with SITELLE
A Search for Supernova Light Echoes in NGC 6946 with SITELLE A Search for Supernova Light Echoes in NGC 6946 with SITELLE By Michael Radica, B.Sc. A Thesis Submitted to the School of Graduate Studies in the Partial Fulfillment of the Requirements for the Degree Master of Science McMaster University c Copyright by Michael Radica August 23, 2019 McMaster University Master of Science (2019) Hamilton, Ontario (Physics & Astronomy) TITLE: A Search for Supernova Light Echoes in NGC 6946 with SITELLE AUTHOR: Michael Radica (McMaster University) SUPERVISOR: Dr. Douglas Welch NUMBER OF PAGES: ix, 88 ii Abstract Scattered light echoes provide a unique way to engage in late-time study of supernovae. Formed when light from a supernova scatters off of nearby dust, and arrives at Earth long after the supernova has initially faded from the sky, light echoes can be used to study the precursor supernova through both photometric and spectroscopic methods. The detection rate of light echoes, especially from Type II supernovae, is not well understood, and large scale searches are confounded by uncertainties in supernova ages and peak luminosities. We provide a novel spectroscopic search method for detecting light echoes, and test it with 4 hours of observations of NGC 6946 using the SITELLE Imaging Fourier Transform Spectrometer mounted on the Canada-France-Hawaii Telescope. Our procedure relies on fitting a sloped model to continuum emission, and identifying negatively-sloped continua with the downslope of the emission component of a highly-broadened P-Cygni profile in the Hα line, characteristic of supernova ejecta. We find no clear evidence for light echoes from any of the ten known Type II su- pernovae in NGC 6946, and only one light echo candidate from potential historical supernovae predating 1917. -
Radio Investigations of Clusters of Galaxies
• • RADIO INVESTIGATIONS OF CLUSTERS OF GALAXIES a study of radio luminosity functions, wide-angle head-tailed radio galaxies and cluster radio haloes with the Westerbork Synthesis Radio Telescope proefschrift ter verkrijging van degraad van Doctor in de Wiskunde en Natuurwetenschappen aan de Rijksuniversiteit te Leiden, op gezag van de Rector Magnificus Or. D.J. Kuenen, hoogleraar in de Faculteit der Wiskunde en Natuurwetenschappen, volgens besluit van het College van Dekanen te verdedigen op woensdag 20 december 1978 teklokke 15.15 uur door Edwin Auguste Valentijn geboren te Voorburg in 1952 Sterrewacht Leiden 1978 elve/labor vincit - Leiden Promotor: Prof. Dr. H. van der Laan aan Josephine aan mijn ouders Cover: Some radio contours (1415 MHz) of the extended radio galaxies NGC6034, NGC6061 and 1B00+1SW2 superimposed to a smoothed galaxy distribution (number of galaxies per unit area, taken from Shane) of the Hercules Superoluster. The 90 % confidence error boxes of the Ariel VandUHURU observations of the X-ray source A1600+16 are also included. In the region of overlap of these two error boxes the position of a oD galaxy is indicated. The combined picture suggests inter-galactic material pervading the whole superaluster. CONTENTS CHAPTER 1 GENERAL INTRODUCTION AND SUMMARY 9 PART 1 OBSERVATIONS OF THE COI1A CLUSTER AT 610 MHZ 15 CHAPTER 2 COMA CLUSTER GALAXIES 17 Observation of the Coma Cluster at 610 MHz (Paper III, with W.J. Jaffe and G.C. Perola) I Introduction 17 II Observations 18 III Data Reduction 18 IV Radio Source Parameters 19 V Optical Data 20 VI The Radio Luminosity Function of the Coma Cluster Galaxies 21 a) LF of the (E+SO) Galaxies 23 b) LF of the (S+I) Galaxies 25 c) Radial Dependence of the LF 26 VII Other Properties of the Detected Cluster Galaxies 26 a) Spectral Indexes b) Emission Lines VIII The Central Radio Sources 27 a) 5C4.85 = NGC4874 27 b) 5C4.8I - NGC4869 28 c) Coma C 29 CHAPTER 3 RADIO SOURCES IN COMA NOT IDENTIFIED WITH CLUSTER GALAXIES 31 Radio Data and Identifications (Paper IV, with G.C. -
Structure in Radio Galaxies
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FY13 High-Level Deliverables
National Optical Astronomy Observatory Fiscal Year Annual Report for FY 2013 (1 October 2012 – 30 September 2013) Submitted to the National Science Foundation Pursuant to Cooperative Support Agreement No. AST-0950945 13 December 2013 Revised 18 September 2014 Contents NOAO MISSION PROFILE .................................................................................................... 1 1 EXECUTIVE SUMMARY ................................................................................................ 2 2 NOAO ACCOMPLISHMENTS ....................................................................................... 4 2.1 Achievements ..................................................................................................... 4 2.2 Status of Vision and Goals ................................................................................. 5 2.2.1 Status of FY13 High-Level Deliverables ............................................ 5 2.2.2 FY13 Planned vs. Actual Spending and Revenues .............................. 8 2.3 Challenges and Their Impacts ............................................................................ 9 3 SCIENTIFIC ACTIVITIES AND FINDINGS .............................................................. 11 3.1 Cerro Tololo Inter-American Observatory ....................................................... 11 3.2 Kitt Peak National Observatory ....................................................................... 14 3.3 Gemini Observatory ........................................................................................ -
2007 the Meaning of Life
The Meaning Of Life This observing list tells a story of birth, life and death within the Universe. Each entry has the essential facts about the object in tabular form and then a paragraph or two explaining why the object is important astrophysi- cally and where is sits on the timeline of the Universe . To get the most out of the list, be sure to read the textual descriptions and physical characteristics as you observe each object. In order to get your “Meaning of Life” observing pin, observe 20 of the 24 objects during the 2007 Eldorado Star Party. The objects are not necessarily listed in the best observing order but a summary sheet at the end lists them in order of setting time. Turn your completed sheet into Bill Tschumy sometime during the event to claim your pin. If you miss me at ESP you can also mail the completed list to the address given at the end of the list. ****Birth ****************************************************************************** NGC 6618 , M 17, Cr 377, Swan Nebula Constellation Type RA Dec Magnitude Apparent Size Observed Sgr DN, OC 18h 20.8m -16º 11! 7.5 11!x11! Age Distance Gal Lon Gal Lat Luminosity Actual Size 1 Myr 6,800 ly 15.1º -0.8º 3,757 Suns 22x22 ly The Swan Nebula houses one of the youngest open clusters known in the Galaxy. At the tender age of 1 million years, the cluster is still embedded in the irregularly shaped nebulosity from which it arose. Although the cluster appears to have around 35 stars, most are not true cluster members. -
Cygnus a Monthly Sky Guide for the Beginning to Intermediate Amateur Astronomer Tom Trusock 10-Aug-2005
Small Wonders: Cygnus A monthly sky guide for the beginning to intermediate amateur astronomer Tom Trusock 10-Aug-2005 Figure 1: Widefield Map 2/16 Small Wonders: Cygnus Target List Object Type Size Mag RA Dec α (alpha) Cygni (Deneb) Star 1.3 20h 41m 38.7s 45 17' 59" β (beta) Cygni (Albireo) Star 3 19h 30m 57.9s 27 58' 18" NGC 7000 Bright Nebula 120.0'x100.0' 4 20h 59m 03.2s 44 32' 16" IC 5070 Bright Nebula 60.0'x50.0' 8 20h 51m 01.1s 44 12' 13" NGC 6960 Supernova Remnant 70.0'x6.0' 7 20h 45m 57.0s 30 44' 12" NGC 6979 Bright Nebula 7.0'x3.0' 20h 51m 14.9s 32 10' 14" NGC 6992 Bright Nebula 60.0'x8.0' 7 20h 56m 39.0s 31 44' 16" M 29 Open Cluster 10.0' 6.6 20h 24m 11.6s 38 30' 58" M 39 Open Cluster 31.0' 4.6 21h 32m 10.4s 48 26' 40" NGC 6826 Planetary Nebula 36" 8.8 19h 44m 58.8s 50 32' 21" NGC 7026 Planetary Nebula 45" 10.9 21h 06m 31.4s 47 52' 28" NGC 6888 Bright Nebula 18.0'x13.0' 10 20h 12m 20.0s 38 22' 18" NGC 6946 Galaxy 11.5'x9.8' 9 20h 35m 01.0s 60 10' 19" Challenge Objects Object Type Size Mag RA Dec PK 64+ 5.1 Planetary Nebula 5" 9.6 19h 35m 02.3s 30 31' 45" Sh2-112 9.0'x7.0' Cygnus ygnus is a spectacular summer constellation.