DOCSLIB.ORG

THE FOML Foilnt

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text

Load more

THEFOML FOilNT The Atlanta Astronomy Club, Inc. Vol. D( No.4 September, 1996 7947-7997 Celebrating Fifty Years of Astronomy in Atlanta The SeptemberMeeting was suggestedthat membersshould bring a covereddish. The ne$ me€ting of the Atlanta Astronomy Club Bring your lawn chairs and telescopes,plus an)'thing you wrll take place at 8:00 pm, Friday. September20. The *ish to gnll. For more details, contact Larry Htggtrrf (@ -2233 meetrng will b€ held at Emory Universit-v's Whire Hall. 770-227 . Our speaker will be Dr. Chris DePree. of Agnes Scott College. Clris will describe his recent work at the Very Die Eard Party At Dauset Trails Large Array (VLA) radio telescope The first annual AAC Die Hard ObserversPafty Unlike their optical counterparts,radio telescopes will be held on November8 and 9. This event will be a no cal consist of componentswhich are separatedb.v large frius star party held at DausetTrails and doesnot take the distances. Their signals are combined electronically, place of the Peach State Star Gaze. It will cost $5.00 a producing an image of much greaterresolution than would personper night. There will be camping on the back field be possiblewith a single antenna.The \/LA is the largest and r€stroom facilities wiU be available. A fire ring, such assemblagein the world. Chris was at the VLA in locatedaway ftom the ok€rving fiel{ will be provided for 1995. and he will describehow astronomersuse this kind warmth. of equipmentto explore the universe. AAC AUGUST MEETING Caler:dar of Observing Events: by Jack Wamer' Sept 13 SidewalkObserving for EgalstonHospital The August meeting of the Adanta Astronomy @ Hardlabor Creek.For directionsplease Club was held on August 16 at Emory Univers8's White contactLarry Higgins aI 770-227-2233. t{all at 8:00 P.M. The guest speakerwas Dr. Dick Miller, Sept 14 Club Picnic/Observirg at Villa Rica. Professorof Astronomyat Georgia state university. There Sept 20 AAC Lteetingat Emory University rMere55 memberspres€nt for Dr. Miller's presentationof Sept 26 Lunor Eclipse! ..don't miss this event,I the subject"Blazars: Th€ Most ExtremeQuazars." ts the last total lunar eclipfe in this part Prior to Dr. Miller's presentatioq AAC Presidert of the world for the rest of the century. Doug Chesser conducted the club's monthly hrsiness Oct 10-13 Chiefland Star Party meeting. [n the president's report, Doug announc€dthe Nov.EJ De-Hard Star Partv at Dauset Trails publicatron of a Master Events Sch€d e that will be maintained b_vArt Russell. The schedrle will be for six monthsand is intendedto eliminate conflictlng club events. Wheream I? Members are requestedto provi& Art Russell wi& dates by Alex Inngoussis and information concerningfuture AAC evena. For those with computerized telescopes,the alignment processoften goesquicker when the observer'slocation is . There were 35 to 40 peopl€ present for the 'lery known. So, with thanks to Riley O'Connor for loaning me successfirlPerseid meteor showerobserving session at his Global Positroning System rec€iver, here are the the CohuttaOverlook, north of Elltjay, on August 10. coordinatesfor someof our obs€rvingsitesi . The New Logo Committee, chaired by Ken Walbum, BarberObsevatory: N 33" 47' 27" W 84" 56' 05" has been working on a new logo presenlationfor the DausetTrails: N 33" 14' 04" W 83' 56' 44" Septembermeeting .ll* R Ranch: N 3.1"37' W 83"57' {5" . Ken Poshedlyhas resignedas Publicity Chairman due to his continuing educationand commilnents to other SeptemberPicnic At Villa Rica! organizations but will conlinue as Chairman of the The AAC Annual Picnic will be held on Peach Slate Star Gaze Event. Art Russell has been September14 at Villa Rica. The club will fumish the hot namedPublicity Chairman. dogs but wiU ne€d some club membersto bring grills. It o The Chiefland Starfestwill be held October l0 rhrcugh scheduledobsewing sessionsin the past few months have October 13, 1996,in Chieflan4 Florida. The five acre beenwashouts or cloudolers (..don'tforget the thisyear's site accomodatescamping at a cost of $5.00 per night. "PeachState Haze-Gaze" -editor). The Advance Site SelectronCommittee is still actively Everyoneused to say .."If Art plans an observing involved in searchingfor an op.imum observingsite. sessionyou can bet on clouds or rain". Well guesswhat . Help is needed in finishing the club's 12" loaner Art, It arr'tjust you! That's right, this obEervingchairman telescope. Anyone with wood working skdls and is under the sameUmbrella (hnm..I think you need to get willing to work on this Foject should contact Eric that thing patched or something,Larry -ed.). I was talking Shelton. to Rich Jakrelthe other day and he said the samething..."it o Alex Langoussis,who has been maintaining the club's seemed to rain or cloud e\€ry time I scheduled an web page for two years is looking for someoneto take observingsession". (tftts was back in 1988-1990,and I over this responsibiliry. eventually clt back on the number of scheduledevents . The next Board of Directors meeting will be at Tushar Jiguring I could "fool" the cloudgods. This heralded the Thrivil<raman's home on Nwember 2. 1996. Please birth of the Zombieswho observedaany* time it was clear, contact a Board memb€rwith anlthign that you would not just on scheduledeyents). So you see what I mean - like the Board to considerat the Novembermeeting. there must be a curse on the observing chairman in . Doug Chesser extended a special thanks to Jerry astronomyclub6! Armstrong and Lenny Abbey for their work in Speaking of curces, oru August lTth observing obtarning speakersfor the club. sessiona1 Dauset Trails looked promising the first tro . Larry Higgins, frserving Chairman, reported on the hour. There was a gteat numberof club members- at least schedrled fonhcorning events. The Egleston Heart 20 at this outing. Of course,before the cloud-godsmade Camp observingevent was changedfrom August 15 to their amearance,we saw a number of good objects. Art SeFember 13. There will be about 100 to 150 people Russelltreated us to somenice views of Uranus.while Ken there and consequendy,volunteers with telescop€s Poshedlyproudly showed off Satum is his 6-inch scope. will be need€d. Contact Larry Higgtns at (770)227- t{ale-Bopp now shidng at magnrtude5.5 was very pretty to view, and Alex l,angoussisdisplayed many good objectsin . Phil Bracken, Treasurer, reported on the club's his l5-inch TecEon. Doug Chessernearly stole the show financial situalion. Phil encourageddonations to the with his CCD setup,His systemeasily cut through the nasty SpeakersFund, ObseJvatoryFund and Refreshment haze allowing us to s€e impressiveimages of galaxies and nebulae accomodationswhen required to obtarn speakers. Phil On August 24th, we held the beginner's interest announced that lhe club has grom lo 214 family goup/ public observingsession at Villa Rica. It was geat membe$hips. fun watching the lightning streakacross the slry, and to fe€l . Jerry Armstrong, hogam Chairman, announcedthe the warm-up shedbeing buffetedby high winds and intense you watn speakersfor Januarywill be Alex Hale and Tom Bopp. rain. The Curse. ..How come didn't meArt? . Art Russell, Rrblicity Chairman, indicated he has addressesand contactsfor the major publications but The Morning Pyramid needsthe addressesand contactsfor local community By Dave Riddle publications. AAC membersahving htis information, The brighlest reflection nebula visible from our please contact him. Art encouragedparticipation in planet lies not in the far reachesof interstellar spacebut in ' ' the BeginnersGroup and the MessierProgram. the near sky surrounding our Sun and appearsin the . l€nny Abbey, Assistant Program chairman, moming skies of SeFemb€ras the Zodiacal ( zoe-DYE-a- amounced that Ben Z€llner r4dl be the speakerfor the kd ) Light , This pymmid shapedglow heraldsthe coming Octobermeeting and Marc Buie will be the speakerfor of the dawn'sfirst light in the eastemslry during SeFember the Novembermeeting. and is a splendidsight as seenfrom a really dark location . Tom Buchanan, Light Pollution Charrman reported Surprisingly , few amateurastronomers look for this cloud that NASA has advised him that his spectrogramof of interplanetary dust during it's Spring and Autumn Halley's Comet has been us€d in their publication apparitionsbut if you have been fortunate enough to have International Hallev Watch Under NASA. seenthis towering glow in a star studdedsky you will look for it a1eyery oppoftnity . For obcerversin th€ temperate The Obserrer's Notebook zone of the the Northem hemisphere, the Light is b€st seen byInrry Higgins when the constellation of Orion ( the 6th hour of Right in the Curseof the ObsemingChairman" Ascension ) stands on the meridian before dawn "The moming sky and after dusk in the evening sky . The Somewhere,sometime, somehow, somebody must ecliptic is inclined almost vertically in relation to the have madesome amateur astronomer "witch doctor" angry. horizon at this tlme and the prramid is best positionedfor I ihink he/she put a spell on all Observing Chairman observauon. around the world. It certainly seemsthat 95% of all the Good dascriptlons of the visual appearanceof rhe round patch of light Zodiacal about 5 degees across There are Light are rather difficult ro find . My own freld reports that the Counterglow is variable in both size and notesare perhapsas good as any I have managedto locate brightnessbut it will always be 1g0 degreesfrom the Sun so I'll quote them here Although this particular and highest in the sky at midnight . If you find yourself obEervationwas in the evening sky it wiU describe ',nder the a good dark sky . try looking around in the Aquarius mormng appari ons aboul as well - Piscesarea this Septernberwhen theseconstellati;ns are February 25th , 1984 high overhead Some book mistalcenly credit the GumLog , GA . 'About American astronom€rEdward Barnard with lhe discoverv an hour and half alter etnset a dilluse of the Gegenschein.
Recommended publications
  • BRAS Newsletter August 2013

    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
  • SEPTEMBER 2014 OT H E D Ebn V E R S E R V ESEPTEMBERR 2014

    SEPTEMBER 2014 OT H E D Ebn V E R S E R V ESEPTEMBERR 2014

    THE DENVER OBSERVER SEPTEMBER 2014 OT h e D eBn v e r S E R V ESEPTEMBERR 2014 FROM THE INSIDE LOOKING OUT Calendar Taken on July 25th in San Luis State Park near the Great Sand Dunes in Colorado, Jeff made this image of the Milky Way during an overnight camping stop on the way to Santa Fe, NM. It was taken with a Canon 2............................. First quarter moon 60D camera, an EFS 15-85 lens, using an iOptron SkyTracker. It is a single frame, with no stacking or dark/ 8.......................................... Full moon bias frames, at ISO 1600 for two minutes. Visible in this south-facing photograph is Sagittarius, and the 14............ Aldebaran 1.4˚ south of moon Dark Horse Nebula inside of the Milky Way. He processed the image in Adobe Lightroom. Image © Jeff Tropeano 15............................ Last quarter moon 22........................... Autumnal Equinox 24........................................ New moon Inside the Observer SEPTEMBER SKIES by Dennis Cochran ygnus the Swan dives onto center stage this other famous deep-sky object is the Veil Nebula, President’s Message....................... 2 C month, almost overhead. Leading the descent also known as the Cygnus Loop, a supernova rem- is the nose of the swan, the star known as nant so large that its separate arcs were known Society Directory.......................... 2 Albireo, a beautiful multi-colored double. One and named before it was found to be one wide Schedule of Events......................... 2 wonders if Albireo has any planets from which to wisp that came out of a single star. The Veil is see the pair up-close.
  • The Midnight Sky: Familiar Notes on the Stars and Planets, Edward Durkin, July 15, 1869 a Good Way to Start – Find North

    The Midnight Sky: Familiar Notes on the Stars and Planets, Edward Durkin, July 15, 1869 a Good Way to Start – Find North

    The expression "dog days" refers to the period from July 3 through Aug. 11 when our brightest night star, SIRIUS (aka the dog star), rises in conjunction* with the sun. Conjunction, in astronomy, is defined as the apparent meeting or passing of two celestial bodies. TAAS Fabulous Fifty A program for those new to astronomy Friday Evening, July 20, 2018, 8:00 pm All TAAS and other new and not so new astronomers are welcome. What is the TAAS Fabulous 50 Program? It is a set of 4 meetings spread across a calendar year in which a beginner to astronomy learns to locate 50 of the most prominent night sky objects visible to the naked eye. These include stars, constellations, asterisms, and Messier objects. Methodology 1. Meeting dates for each season in year 2018 Winter Jan 19 Spring Apr 20 Summer Jul 20 Fall Oct 19 2. Locate the brightest and easiest to observe stars and associated constellations 3. Add new prominent constellations for each season Tonight’s Schedule 8:00 pm – We meet inside for a slide presentation overview of the Summer sky. 8:40 pm – View night sky outside The Midnight Sky: Familiar Notes on the Stars and Planets, Edward Durkin, July 15, 1869 A Good Way to Start – Find North Polaris North Star Polaris is about the 50th brightest star. It appears isolated making it easy to identify. Circumpolar Stars Polaris Horizon Line Albuquerque -- 35° N Circumpolar Stars Capella the Goat Star AS THE WORLD TURNS The Circle of Perpetual Apparition for Albuquerque Deneb 1 URSA MINOR 2 3 2 URSA MAJOR & Vega BIG DIPPER 1 3 Draco 4 Camelopardalis 6 4 Deneb 5 CASSIOPEIA 5 6 Cepheus Capella the Goat Star 2 3 1 Draco Ursa Minor Ursa Major 6 Camelopardalis 4 Cassiopeia 5 Cepheus Clock and Calendar A single map of the stars can show the places of the stars at different hours and months of the year in consequence of the earth’s two primary movements: Daily Clock The rotation of the earth on it's own axis amounts to 360 degrees in 24 hours, or 15 degrees per hour (360/24).
  • DSLR PHOTOMETRY: a Citizen Science Project Using a Consumer Camera to Contribute Scientific Data

    DSLR PHOTOMETRY: a Citizen Science Project Using a Consumer Camera to Contribute Scientific Data

    DSLR PHOTOMETRY: A citizen science project using a consumer camera to contribute scientific data by Mike Durkin Photometry is one of many areas in astronomy where amateurs can make useful contributions. Other areas include astrometry, occultation timings, and recording high quality observations of solar system objects. There are also projects for “armchair astronomers”, such as Galaxy Zoo. What is Photometry? Photometry is the measurement and study of the brightness of objects In astronomy, photometry is used to measure the brightness of stars , supernovae, asteroids , etc. I will be talking mostly about measuring variable stars , which are stars that change brightness over time. By studying the how the brightness of objects change over time, it can help determine physical properties. LIGHT CURVE shows brightness changes over time Cepheids are a type of variable stars that fluctuate in brightness. There is a well defined relationship between brightness and the Period of the brightness variation. Cepheids were used to determine the distance to the Andromeda Galaxy and proved that the universe was much larger than just the Milky Way. Light Curve for an asteroid can be used to show rotational period. Light curve for eclipsing binary The light curve for an eclipsing binary can be used to determine properties such as the diameters, luminosities, and separation of the stars. Eclipsing binary star animation courtesy of Wikimedia Commons THIS SOUNDS LIKE STUFF FOR PROFESSIONAL ASTRONOMERS, WHAT GOOD CAN AMATEURS DO? There are a lot more amateurs than professionals Estimated total number of professional astronomers is 2,080 (U.S. Dept. of Labor, Bureau of Labor Statistics) Estimated total number of amateurs is at least 100,000 based on the circulation numbers of magazines.
  • Titles Promote Sustainable Initiatives

    Titles Promote Sustainable Initiatives

    Student Research Poster Symposium April 8, 2011 Villanova University Sigma Xi Research Poster Symposium, April 8, 2011 2 Proceedings of the 2011 Student Research Symposium April 8, 2011 Villanova Room Villanova University Villanova, PA 19085 USA Supported by: The Villanova Chapter of Sigma Xi, the Scientific Research Society Sigma Xi Research Poster Symposium, April 8, 2011 This volume is also available electronically on the Sigma Xi chapter’s website, http://www.csc.villanova.edu/~sigmaxi/ Sigma Xi Research Poster Symposium, April 8, 2011 4 Welcome from the Poster Symposium Organizers Welcome to the 2010 Villanova University Sigma Xi’s Student Research Poster Symposium! Sigma Xi is the international honor society for research scientists and engineers. The Villanova chapter of Sigma Xi is proud to sponsor this poster symposium event to recognize and celebrate the research work accomplished by our students, and to give students an opportunity to further develop their skills in communicating those accomplishments. This book contains abstracts of 56 contributed posters. Outstanding posters will be recognized in the form of poster awards. Many thanks to all students who contributed to this symposium. We gratefully acknowledge the dedicated poster judges who committed to evaluating the research posters and providing written feedback at the end of the symposium. Special thanks for their time and commitment to promoting research at Villanova University! Congratulations to all! Mirela Damian Sigma Xi Chapter President Anil Bamezai Sigma Xi Chapter President-Elect Sridhar Santhanam Sigma Xi Chapter Secretary-Treasurer Sigma Xi Research Poster Symposium, April 8, 2011 Table of Contents Astronomy and Astrophysics (5) Ultraviolet Spectral Synthesis of HgMn Stars.
  • THE NICKEL MASS DISTRIBUTION of NORMAL TYPE II SUPERNOVAE 3 Supernova Are the Magnitudes in Different filters, the Pho- Above

    THE NICKEL MASS DISTRIBUTION of NORMAL TYPE II SUPERNOVAE 3 Supernova Are the Magnitudes in Different filters, the Pho- Above

    DRAFT VERSION MAY 17, 2017 Preprint typeset using LATEX style emulateapj v. 12/16/11 THE NICKEL MASS DISTRIBUTION OF NORMAL TYPE II SUPERNOVAE ∗ TOMAS´ MULLER¨ 1,2 , JOSE´ L. PRIETO1,3,ONDREJˇ PEJCHA4 AND ALEJANDRO CLOCCHIATTI1,2 1 Millennium Institute of Astrophysics, Santiago, Chile 2 Instituto de Astrof´ısica, Pontificia Universidad Cat´olica de Chile, Av. Vicua Mackenna 4860, 782-0436 Macul, Santiago, Chile 3 N´ucleo de Astronom´ıa de la Facultad de Ingenier´ıa y Ciencias, Universidad Diego Portales, Av. Ej´ercito 441, Santiago, Chile 4 Lyman Spitzer Jr. Fellow, Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ 08540, USA Draft version May 17, 2017 ABSTRACT Core-collapse supernova explosions expose the structure and environment of massive stars at the moment of their death. We use the global fitting technique of Pejcha & Prieto (2015a,b) to estimate a set of physical pa- 56 rameters of 19 normal Type II SNe, such as their distance moduli, reddenings, Ni masses MNi, and explosion energies Eexp from multicolor light curves and photospheric velocity curves. We confirm and characterize known correlations between MNi and bolometric luminosity at 50 days after the explosion, and between MNi and Eexp. We pay special attention to the observed distribution of MNi comingfrom a jointsampleof 38 TypeII SNe, which can be described as a skewed-Gaussian-like distribution between 0.005 M⊙ and 0.280 M⊙, with a median of 0.031 M⊙, mean of 0.046 M⊙, standard deviation of 0.048 M⊙ and skewness of 3.050. We use two- sample Kolmogorov-Smirnov test and two-sample Anderson-Darling test to compare the observed distribution of MNi to results from theoretical hydrodynamical codes of core-collapse explosions with the neutrino mech- anism presented in the literature.
  • Equatorial Night Sky for August 2011

    Equatorial Night Sky for August 2011

    I N E D R I A C A S T N E O D I T A C L E O R N I G D S T S H A E P H M O O R C I . Z N O i s e d H e . p s i c e O l N t e u c d r Z e i n I H C t y h R I b e R n O s i k a C y l H s L w s E i E a t h w H ( h ) T F i n O s o D R l NORTH g e N a M f r t E A D X f O o e A H o C h M T t T . I ( o P N n S L o E c E i Z a P t r s “ E EQUATORIAL EDITION D A N h , H e O y T M a R g d T o N Y . l H E o ” K E h ) t W S . y . T T m E U W B n R I N The Evening Sky Map W D E T T AUGUST 2011 WH A MINOR E C FREE* EACH MONTH FOR YOU TO EXPLORE, LEARN & ENJOY THE NIGHT SKY O S L K CEPHEUS URSA Y E β R M T . A h A n SKY MAP SHOWS HOW e Get Sky Calendar on Twitter S P o i T N t C A Thuban a o E R l l r Sky Calendar – August 2011 J http://twitter.com/skymaps O t THE NIGHT SKY LOOKS e B h t U δ e s O N r n n L D o A c NE C & Alcor & I MAJOR I EARLY AUG 9 PM r T T e o URSA S Mizar v 1 Moon near Regulus (21° from Sun, evening sky) at 7h UT.
  • The Evening Sky Map

    The Evening Sky Map

    I N E D R I A C A S T N E O D I T A C L E O R N I G D S T S H A E P H M O O R C I . Z N O p l f e i n h d o P t O o N ) l h a r g Z i u s , o I l C t P h R I r e o R N ( O o r C r H e t L p h p E E i s t D H a ( r g T F i . O B NORTH D R e N M h t E A X O e s A H U M C T . I P N S L E E P Z “ E A N H O NORTHERN HEMISPHERE M T R T Y N H E ” K E η ) W S . T T E W U B R N W D E T T W T H h A The Evening Sky Map e MAY 2021 E . C ) Cluster O N FREE* EACH MONTH FOR YOU TO EXPLORE, LEARN & ENJOY THE NIGHT SKY r S L a o K e Double r Y E t B h R M t e PERSEUS A a A r CASSIOPEIA n e S SKY MAP SHOWS HOW Get Sky Calendar on Twitter P δ r T C G C A CEPHEUS r E o R e J s O h Sky Calendar – May 2021 http://twitter.com/skymaps M39 s B THE NIGHT SKY LOOKS T U ( O i N s r L D o a j A NE I I a μ p T EARLY MAY PM T 10 r 61 M S o S 3 Last Quarter Moon at 19:51 UT.
  • Three Editions of the Star Catalogue of Tycho Brahe*

    Three Editions of the Star Catalogue of Tycho Brahe*

    A&A 516, A28 (2010) Astronomy DOI: 10.1051/0004-6361/201014002 & c ESO 2010 Astrophysics Three editions of the star catalogue of Tycho Brahe Machine-readable versions and comparison with the modern Hipparcos Catalogue F. Verbunt1 andR.H.vanGent2,3 1 Astronomical Institute, Utrecht University, PO Box 80 000, 3508 TA Utrecht, The Netherlands e-mail: [email protected] 2 URU-Explokart, Faculty of Geosciences, Utrecht University, PO Box 80 115, 3508 TC Utrecht, The Netherlands 3 Institute for the History and Foundations of Science, PO Box 80 000, 3508 TA Utrecht, The Netherlands Received 6 January 2010 / Accepted 3 February 2010 ABSTRACT Tycho Brahe completed his catalogue with the positions and magnitudes of 1004 fixed stars in 1598. This catalogue circulated in manuscript form. Brahe edited a shorter version with 777 stars, printed in 1602, and Kepler edited the full catalogue of 1004 stars, printed in 1627. We provide machine-readable versions of the three versions of the catalogue, describe the differences between them and briefly discuss their accuracy on the basis of comparison with modern data from the Hipparcos Catalogue. We also compare our results with earlier analyses by Dreyer (1916, Tychonis Brahe Dani Scripta Astronomica, Vol. II) and Rawlins (1993, DIO, 3, 1), finding good overall agreement. The magnitudes given by Brahe correlate well with modern values, his longitudes and latitudes have error distributions with widths of 2, with excess numbers of stars with larger errors (as compared to Gaussian distributions), in particular for the faintest stars. Errors in positions larger than 10, which comprise about 15% of the entries, are likely due to computing or copying errors.
  • Time, Spatial, and Spectral Resolution of the Halpha Line-Formation Region of Deneb and Rigel with the VEGA/CHARA Interferometer

    Time, Spatial, and Spectral Resolution of the Halpha Line-Formation Region of Deneb and Rigel with the VEGA/CHARA Interferometer

    Astronomy & Astrophysics manuscript no. AB˙Supergiants˙vResubmission˙vEnglishCorr˙Printer c ESO 2018 October 11, 2018 Time, spatial, and spectral resolution of the Hα line-formation region of Deneb and Rigel with the VEGA/CHARA interferometer ⋆ O. Chesneau1, L. Dessart2 D. Mourard1, Ph. B´erio1, Ch. Buil3, D. Bonneau1, M. Borges Fernandes1,9, J.M. Clausse1, O. Delaa1, A. Marcotto1, A. Meilland4, F. Millour4, N. Nardetto1, K. Perraut5, A. Roussel1, A. Spang1, P. Stee1, I. Tallon-Bosc6, H. McAlister7,8, T. ten Brummelaar8, J. Sturmann8, L. Sturmann8, N. Turner8, C. Farrington8 and P.J. Goldfinger8 1 UMR 6525 H. Fizeau, Univ. Nice Sophia Antipolis, CNRS, Observatoire de la Cˆote d’Azur, Av. Copernic, F-06130 Grasse, France 2 Laboratoire d’Astrophysique de Marseille, Universit´ede Provence, CNRS, 38 rue Fr´ed´eric Joliot-Curie, F-13388 Marseille Cedex 13, France 3 Castanet Tolosan Observatory, 6 place Clemence Isaure, 31320 Castanet Tolosan, France 4 Max-Planck Institut f¨ur Radioastronomie, Auf dem Hugel 69, 53121, Bonn, Germany 5 Laboratoire d’Astrophysique de Grenoble (LAOG), Universit´eJoseph-Fourier, UMR 5571 CNRS, BP 53, 38041 Grenoble Cedex 09, France 6 Univ. Lyon 1, Observatoire de Lyon, 9 avenue Charles Andr´e, Saint-Genis Laval, F-69230, France 7 Georgia State University, P.O. Box 3969, Atlanta GA 30302-3969, USA 8 CHARA Array, Mount Wilson Observatory, 91023 Mount Wilson CA, USA 9 Observat´orio Nacional, Rua General Jos´eCristino, 77, 20921-400, S˜ao Cristov˜ao, Rio de Janeiro, Brazil Received, accepted. ABSTRACT Context. BA-type supergiants are amongst the most optically-bright stars.
  • Q4 FY 2011 FINAL.Indd

    Q4 FY 2011 FINAL.Indd

    Josh Carter of the Harvard-Smithsonian Center for Astrophysics was an author of a study in Science announcing the discovery of Kepler-16b, the fi rst confi rmed example of a circumbinary planet—a planet orbiting not one, but two stars. Report to the Regents Fourth Quarter, Fiscal Year 2011 Prepared by Offi ce of Policy and Analysis Broadening Access: Visitation Summary In fi scal year 2011, the Smithsonian counted 29.2 million visits to its museums in Washington, D.C. and New York, plus the National Zoological Park and Steven F. Udvar-Hazy Center—very similar to the fi scal year 2010 fi gure of 29.9 million. Th e Smithsonian Redesign project has identifi ed “unique visitors” as the key Smithsonian-wide web visitation metric to be tracked going forward. In fi scal year 2011, the Smithsonian counted approximately 79 million unique visitors to its numerous websites. Because this metric diff ers from the web “visits” metric reported previously, this fi gure cannot be directly compared with the fi gures A visitor in the Butterfl y Pavilion of the National Museum of Natural History given in previous Reports to the Regents. Visits to Smithsonian Venues and Traveling Exhibitions Fiscal Years 2009, 2010, and 2011 9 8 7 6 Millions 5 4 FY 2009 3 FY 2010 FY 2011 2 1 0 Freer/Sackler Renwick Air and Space Hirshhorn Heye Center-NY Natural History African Art Ripley Center Udvar-Hazy Reynolds Center Anacostia Postal Cooper-Hewitt-NY National Zoo SI Castle American History American Indian-Mall Report to the Regents, January 2012 1 Grand Challenges Highlights Understanding the American Experience Research This quarter saw the publication of The Jefferson Bible: Smithsonian Edition, a full-color facsimile of Th omas Jeff erson’s unique work The Life and Morals of Jesus of Nazareth, a rearranged and edited version of the New Testament gospels selected from printed texts in English, French, Latin, and Greek.
  • The Blue Planet Report from Stellafane Perspective on Apollo How to Gain and Retain New Members

    The Blue Planet Report from Stellafane Perspective on Apollo How to Gain and Retain New Members

    Published by the Astronomical League Vol. 71, No. 4 September 2019 THE BLUE PLANET REPORT FROM STELLAFANE 7.20.69 5 PERSPECTIVE ON APOLLO YEARS APOLLO 11 HOW TO GAIN AND RETAIN NEW MEMBERS What’s Your Pleasure? From Famous Observatories to Solar Eclipse Take Your Pick From These Tours Travel Down Under to visit top Australian Observatories observatories, including Siding October 1–9, 2019 Spring and “The Dish” at Parkes. Go wine-tasting, hike in nature reserves, and explore eclectic Syd- ney and Australia’s capital, Can- berra. Plus: Stargaze under south- ern skies. Options to Great Barrier Reef and Uluru or Ayers Rock. skyandtelescope.com/australia2019 Uluru & Sydney Opera House: Tourism Australia; observatory: Winton Gibson Astronomy Across Italy May 3–11, 2020 As you travel in comfort from Rome to Florence, Pisa, and Padua, visit the Vatican Observatory, the Galileo Museum, Arcetri Observatory, and more. Enjoy fine food, hotels, and other classic Italian treats. Extensions in Rome and Venice available. skyandtelescope.com/italy2020 S&T’s 2020 solar eclipse cruise offers 2 2020 Eclipse Cruise: Chile, Argentina, minutes, 7 seconds of totality off the and Antarctica coast of Argentina and much more: Nov. 27–Dec. 19, 2020 Chilean fjords and glaciers, the legendary Drake Passage, and four days amid Antarctica’s waters and icebergs. skyandtelescope.com/chile2020 Patagonian Total Solar Eclipse December 9–18, 2020 Come along with Sky & Telescope to view this celestial spectacle in the lakes region of southern Argentina. Experience breathtaking vistas of the lush landscape by day — and the southern sky’s incompa- rable stars by night.