ursa minor dwarf galaxy

The membership-weightedsampleis867.5stars. Key diagnostic abundance ratios include C/Fe, {\alpha}/Fe, Mn/Fe and Ni/Fe ratios . We present a large-area photometric survey of the Ursa Minor dwarf spheroidal galaxy and its environs. Both are satellite galaxies of the Milky Way, held in orbit by our Galaxy's gravity. THREE-DIMENSIONAL HYDRODYNAMICAL SIMULATIONS OF THE SUPERNOVAE-DRIVEN GAS LOSS IN THE DWARF SPHEROIDAL GALAXY URSA MINOR A. Caproni1, G. A. Lanfranchi1, A. Luiz da Silva1,2, and D. Falceta-Gonçalves3,4 1 Núcleo de Astrofísica Teórica, Universidade Cruzeiro do Sul—Rua Galvão Bueno 868, CEP 01506-000, São Paulo, Brazil; anderson.caproni@cruzeirodosul.edu.br The Ursa Minor dwarf galaxy : still an old stellar system ... Unlike the Milky Way, Ursa Minor has no gas from which to create new stars, and its stars are old. Its center is around 225,000 light-years away from Earth. The galaxy consists mainly of older stars and there is little to no ongoing star formation in the Ursa Minor Dwarf galaxy. The Ursa Minor dwarf spheroidal galaxy is then at a distance of 69 +/- 4 kpc from the Sun. Kochab (Beta Ursae Minoris) | Star Facts We present results of our search for X-ray line emission associated with the radiative decay of the sterile neutrino, a well-motivated dark matter candidate, in Suzaku Observatory spectra of the Ursa Minor dwarf spheroidal galaxy. The Ursa Minor Dwarf is a dwarf elliptical galaxy in Ursa Minor. Astronomical Glossary Hint for a faint intermediate mass black hole in the Ursa ... For reference, the full moon is 30' (arc minutes) or 0.5° in size. PDF National Optical Astronomy Observatories We present the faint stellar luminosity function in an external galaxy, the Ursa Minor dwarf Spheroidal (dSph). The Draco and Ursa Minor Dwarf Spheroidal Galaxies: A ... URSA MINOR 15 09 11.3400 +67 12 51.70 V~23.5, main sequence turn-off Target Config Mode and Spectral Elements Flags Orbits URSA MINOR ACS/WFC Imaging F606W 5 URSA MINOR ACS/WFC Imaging F814W 6 Total prime orbits:11 Mr. Joel Leja : The Low-Mass Initial Mass Function of Dwarf Galaxy Ursa Minor It is a satellite galaxy to the Milky Way. Faint Stars in the Ursa Minor Dwarf Spheroidal Galaxy ... Ursa Minor Dwarf PDF The Low-Mass Initial Mass Function of Dwarf Galaxy Ursa Minor We compare the fiducial sequence of Ursa Minor with the fiducial sequence of the Galactic globular cluster M92 (NGC 6341). The mass-to-light ratios of the Draco and Ursa minor dwarf ... We report the results of the analysis of an archive Chandra observation of the Ursa Minor spheroidal galaxy, one of the closest Milky Way satellites, searching for signatures from the intermediate mass black hole possibly hosted in the center of the galaxy. No . The data cover out beyond the nominal tidal radius down to ~25 mag in i band, which is ~2 mag below the main sequence turn-off point. Only 220,000 light-years from Earth, the Ursa Minor dwarf is a satellite of the Milky Way, orbiting our Galaxy just as the Moon orbits the Earth. The nearby Ursa Minor dwarf spheroidal (UMi dSph) is one of the most dark matter-dominated galaxies known, with a central mass-to-light ratio M/L ~ 70. Ursa Minor Dwarf is magnitude 11.9 *, is 0.2 million light-years away, and is 30.2' x 19.1' in size. Of the 118 stars in our sample with multiple observations, six are velocity variables with χ 2 probabilities below 0.001. There are a few dozen dwarf galaxies in orbit around the Milky Way. The catalog has a total of 1533 stars. Ursa Minor Dwarf - Giuseppe Donatiello.jpg 3,423 × 3,423; 2.13 MB. Although the catalogue magnitude is 15.7, the light is spread out over an area almost as large as the Moon, some 30' x 20' in size, so the surface brightness is extremely low. The Ursa Minor dwarf galaxy : still an old stellar system. Like many of the dwarf galaxies this one shows a low surface brightness and it can only bee viewed from a dark site. metallicity in the Ursa Minor (UMi) dwarf spheroidal (dSph) galaxy. galaxy. U Velocity: The component of a star's motion away from the Galactic center. Our Milky Way exists in a group of galaxies and these all galaxies are called Local Group Galaxies.So, Local Group (LG) is a galaxy group where more than 50 galaxies exist with our Milky Way and Andromeda (neighbor galaxy). Type: Dwarf spheroidal galaxies of the Local Group share a similar characteristic nowadays: a low amount of gas in their interiors. This relatively-nearby companion galaxy to the Milky Way has a stellar population with narrow distributions of age and of metallicity, remarkably similar to that of a classical halo globular cluster, i.e. Ursa Minor.jpg 3,996 × 2,708; 2.57 MB. The structural parameters of UMi are derived using red giant branch (RGB) stars and sub-giant branch (SGB) stars, and . It shines at mag. See also • Ursa Minor Dwarf • Ursa Major II Dwarf References •^ a b . PGC 54074, also known as the Ursa Minor Dwarf, is very large and extremely faint member of the Local Group. In fact, when it was discovered in 2006, it was the single least luminous galaxy ever seen, beating the previous record holder, an exceptionally dim galaxy in the constellation Ursa Minor.. . 11.2), and the supergiant elliptical radio galaxy NGC 6251 (mag. The Ursa Minor Dwarf Galaxy is an elliptical dwarf galaxy in the constellation of the Little Bear. Ursa Minor may be the only dwarf galaxy in the Local Group which is COml)osed exclusively of stars older than 10 Gyr (Mateo 1998). The authors present astrometry and photographic photometry of the central region of the Ursa Minor dwarf spheroidal galaxy. This survey is intended to trace the distribution of stars outside the nominal tidal radius of this system. This galaxy was discovered . It is a dwarf elliptical or dwarf spheroidal galaxy, consisting of an old stellar population only and no significant amount of interstellar matter. I found it difficult to but little enough white charcoal onto the black paper so that is actually looks like it does in the eyepiece. The galaxy can be observed almost all year in the northern hemisphere. It appears in the Ursa Minor constellation, and is a satellite galaxy of the Milky Way. The main sequence turnoff is easily visible. The Ursa Minor Dwarf is a dwarf spheroidal galaxy, discovered by A.G. Wilson of the Lowell Observatory, in the United States, during the Palomar Sky Survey in 1955. These velocities were obtained using the KPNO 4 m telescope with the Hydra multifiber positioner and bench spectrograph in 1992, 1993, and 1994. Its discovery came about from data collected by the Sloan Digital Sky Survey of 2006. Its centre is around 225 000 light-years distant from Earth. Polaris (Alpha Ursae Minoris), at the end of the Little Dipper's handle, marks (roughly) the Ursa Minor Dwarf Galaxy‎ (3 F) Pages in category "Ursa Minor (constellation)" This category contains only the following page. It appears in the Ursa Minor constellation, and is a satellite galaxy of the Milky Way.The galaxy consists mainly of older stars and seems to house little to no ongoing star formation. Sextans Dwarf; This galaxy was discovered in 1989. The authors have constructed a color-magnitude diagram of the Ursa Minor dwarf spheroidal to m V = 24.8 mag from charged-coupled device (CCD) observations with the Kitt Peak 4 m telescope. : סאגיטאריוס ( Sagittarius Dwarf ), דובה קטנה ( Ursa Minor Dwarf) ודרקון ( Darco Dwarf ). Ursa Major II Dwarf . The Ursa Major I dwarf galaxy is about 3.30 × 10 5 light years away, which is roughly twice the distance to the Large Magellanic Cloud. Another dwarf galaxy, the farthest satellite galaxy, is the Leo I dwarf galaxy: The newest member of our satellite galaxies is the Pegasus Dwarf Galaxy. The total size of the Local . The biggest galaxy of the cluster is the Andromeda Galaxy, an unbarred spiral galaxy, closely followed by our own Milky Way. Ursa Minor Dwarf (PGC 54074, UGC 9749) - is a dwarf spheroidal satellite galaxy of the Milky Way. It was discovered in 1954 by Albert George Wilson at the Lowell Observatory and is a satellite of the Milky Way. Most of these galaxies are only identifiable through telescopes and have been named after the constellation in which they appear on the sky (for example, Draco, Sculptor or Leo). 14.3). The Ursa Major II Dwarf is known as one of the smallest of the Milky Way's satellites. Derivation of the star formation . These studies, based on first-epoch Hale Observatory 5 m plates, second . We present (V, I) photometry of two wide (~=25×25 arcmin 2 ) fields centered on the low surface brightness dwarf spheroidal galaxies Draco and Ursa Minor. From comparison with theoretical nucleosynthesis yields, we show that the chemical composition of the most metal-rich star in the Ursa Minor dwarf galaxy, COS 171, is dominated by nucleosynthesis from a low-metallicity, low-mass, sub-Chandrasekhar mass SN Ia. Sombrero Galaxy = M 104 = NGC 4594: 12 39.9-11 37: Spindle Galaxy = NGC 3115: 10 05.2-07 42: Stephan's Quintet = NGC 7317-20 = Arp 319: 22 36.0 +33 58: Superantennae : 19 31.4-72 39: Triangulum galaxy = M33 = NGC 0598: 01 33.9 +30 39: Ursa Minor dwarf = DDO 199: 15 08.8 +67 12: Virgo A = M87 = NGC 4486 = Arp 152: 12 30.8 +12 23: Whirlpool . The Ursa Minor Dwarf is a spheroidal dwarf galaxy, a satellite galaxy to our Milky Way. Ursa Minor is the second-closest dSph satellite of theMilkyWay(d = 69kpc)andwasdiscoveredinthePalo-mar survey by Wilson (1955). +11.9 and covers 30 x 19 arc minutes of apparent sky. Those stars are spread out from one another, giving the Ursa Minor Galaxy a diffuse appearance. The Ursa Minor Dwarf galaxy has an apparent magnitude of 11.9. Polaris (Alpha Ursae Minoris), at the end of the Little Dipper's handle, marks (roughly) the It has an apparent magnitude of 11.9 and is approximately 200,000 light years distant. Ursa Minor Dwarf Galaxy: An intrinsically faint (M v - 9) dwarf elliptical galaxy about 70 pc distant, in the Local Group. Draco and Ursa Minor dwarf galaxies. These results suggest a strong test to the \Lambda-cold dark matter scenario at dwarf . These include a barred spiral galaxy known as NGC 6217, a dwarf spheroidal galaxy called the Ursa Minor Dwarf, and an active supergiant elliptical radio galaxy known as NGC 6251. Interesting deep sky objects in Ursa Minor include the Ursa Minor Dwarf, a relatively bright (mag. This is because of it's close proximity to the North celestial pole.It is comprised of a triple star system, made up of a yellow supergiant and two smaller stars. This image shows you an extraordinary-dimmed galaxy of "Ursa Minor Dwarf" positioned at about 4.7 degrees south of beta UMi. The Ursa Minor Dwarf is a dwarf spheroidal galaxy, discovered by A.G. Wilson of the Lowell Observatory, in the United States, during the Palomar Sky Survey in 1955. Ursa Minor Dwarf Galaxy (UMi) 220,000: 1000: Sculptor Dwarf Galaxy (Scl) 260,000: 1000: Draco Dwarf Galaxy (Dra) 270,000: 500: Sextans Dwarf Galaxy (Sex) 290,000: . New estimates of the distance to these galaxies are provided [(m-M) 0 (UMi)=19.41+/-.12 and (m-M) 0 (Dra)=19.84+/-.14], and a comparative study of their evolved stellar population is presented. A list of all 91 named galaxies of the night sky that can be found by binoculars, or telescope (denoted by magnitude). July 2012; The Astrophysical Journal 757(1) DOI . Its centre is around 225,000 light years . In key cases, UGC 9749・Ursa Minor Dwarf（Galaxy・Ursa Minor）Mag：10.6 mag, Size：32′ x 32′, Class：dSph D, z -0.000823 , RA 15h 09m 11.34s DEC +67d 12m 51.7s (J2000.0) こぐま座にあるUGC 9749は、地球からの距離約22万光年の矮小楕円銀河で、天の川銀河の伴銀河です。 The Ursa Minor Dwarf is a spheroidal dwarf galaxy, a satellite galaxy to our Milky Way. The Boötes Dwarf is also one of the Milky Way's most remote companion galaxies. Ursa Minor Dwarf Galaxy (UMi) 220,000: 1000: Sculptor Dwarf Galaxy (Scl) 260,000: 1000: Draco Dwarf Galaxy (Dra) 270,000: 500: Sextans Dwarf Galaxy (Sex) 290,000: . As a part of a project devoted to the study of the Ursa Minor dwarf spheroidal (dSph) galaxy, the star formation history of the galaxy is presented. It is a dwarf elliptical or dwarf spheroidal galaxy, consisting of an old stellar population only and no significant amount of interstellar matter. The galaxy appears spheroidal, and it is 0.098 million light years from Earth. BELL Astronomy Program, University of Maryland, College Park, Maryland 20742 Received 1984 August 9, revised 1984 December 10 A number of synthetic spectra have been compared with Stetson's (1984) low-dispersion spectra of stars in the Draco and Ursa Minor dwarf galaxies. Although within the range of amateur telescopes, the Ursa Minor Dwarf galaxy is a difficult target due to its low surface brightness. Dark Matter Subhalos in the Ursa Minor Dwarf Galaxy. Its center is around 225,000 light-years away from Earth. The group is around 10 Mly in (3.1 Mpc) in diameter. Ursa Minor is rather devoid of deep-sky objects. Through numerical simulations, we study the dissolution timescale of the Ursa Minor cold stellar clump, due to the combination of phase-mixing and gravitational encounters with compact dark substructures in the halo of Ursa Minor. Of these, 1060 have a nonzero membership probability. A dwarf spheroidal galaxy in the Local Group, about 2.1 × 10 5 light-years (1.2 × 10 18 miles or 2.0 × 10 18 kilometers) away. We compare two scenarios; one where the dark halo is made up by a smooth mass distribution of light particles and one where the halo contains 10% of its mass in the . Two dwarf galaxies, Draco (left) and Ursa Minor (right), as viewed by ESA's Gaia satellite using information from the mission's second data release. The Muñoz 1 globular cluster is seen to the right of the Ursa Minor dwarf galaxy in this image from the Canada-France-Hawaii Telescope MegaCam imager. The analysis uses wide-field photometry, encompassing about 1° × 1° (the total covered area being 0.75 deg 2), which samples the galaxy out to its tidal radius. Section 2 is a. discussion of the observations and photometric reductions. Discovered at the same time as the Ursa Minor dwarf galaxy in 1954, this galaxy is almost identical in size and consists of only very old stars. Ursa Minor Dwarf - spheroidal dwarf galaxy. ABUNDANCES OF GIANT STARS IN THE DRACO AND URSA MINOR DWARF GALAXIES R. A. We have carried out a wide and deep imaging survey for the Local Group dwarf spheroidal galaxy Ursa Minor (UMi) using Hyper Suprime-Cam (HSC). Olszewski, E. W. ; Aaronson, M. Abstract. גלקסיית שביל החלב מצויה . The 91 Named Galaxies. Most stars in the Ursa Minor Dwarf are old and there is little to no star forming activity going on in the galaxy. (Image credit: Geha & Muñoz) Astronomers . Ursa Minor Dwarf, is a spheroidal dwarf located in the constellation Ursa Minor. "Nearly every galaxy has an entourage of globular clusters," said Geha, "so we first thought that Muñoz 1 might be associated with the nearby Ursa Minor dwarf galaxy." By using spectroscopic data to measure the relative velocities of the cluster and the dwarf galaxy, they discovered quite the opposite was the case. Ursa Minor Dwarf is one of the small satellite galaxies of our Milky Way Galaxy, at a distance of about 240,000 light years. It is one of the least luminous galaxies ever discovered. Ursa Minor hosts a couple of deep-sky objects as well, such as the Ursa Minor Dwarf galaxy, Polarissima Borealis, the closest galaxy to the North Celestial Pole, the barred spiral galaxy NGC 6217, or the supergiant elliptical radio galaxy NGC 6251, among others. We have measured 206 radial velocities for 94 probable members in the Ursa Minor dwarf spheroidal galaxy and 167 velocities for 91 probable members in the Draco dwarf spheroidal galaxy. old and metal-poor. Our galaxy, the Milky Way, is surrounded by about fifty dwarf galaxies. The image in this page was obtained by Mischa Schirmer, obtained July 6-9 . These data represent the first deep observation of one of these extreme mass-to-light systems and the first dedicated dark matter search using an X-ray telescope. As the common name implies, the galaxy is located in Ursa Minor. Name: Ursa Minor Dwarf. In this work, we present results from a three-dimensional hydrodynamical simulation of the gas inside an object with similar characteristics of the Ursa Minor galaxy. It is a dwarf elliptical or dwarf spheroidal galaxy, consisting of an old stellar population only and no significant amount of interstellar matter. It's considered that the dwarf galaxy is one of companions of our Galaxy with a distance of only 210 thousand light years. It mostly comprises old stars and it seems to house little ongoing star formation. Ursa Minor contains no Messier objects. It is a very low luminosity galaxy but seems to be rather bigger than the Ursa Minor and Draco galaxies. If a star moves away from the Galactic center, the star's U velocity is positive; if a star moves toward the Galactic center, the U velocity is . Ursa Minor Dwarf is one of the small satellite galaxies of our Milky Way Galaxy, at a distance of about 240,000 light years. Direct kinematic detection of BHs in dwarf spheroidal (dSph) galaxies are seriously hindered by the small number of stars inside the gravitational influence region of the BH. We find that [Fe/H] for the sample stars ranges from −1.35 to −3.10 dex. THE URSA MINOR DWARF GALAXY 3107 Ursa Minor core Irwin & Hatzidimitriou(r c \15@.8 ^1@.2, 1995). Ursa Minor does not contain any particularly bright deep sky objects. The Local Group is a small cluster of more than 50 galaxies located in the outskirts of the Virgo Supercluster. Observations were made with the Washington M, Washington T 2 Notable galaxies in the constellation include the Ursa Minor Dwarf (mag. 11.9) dwarf spheroidal galaxy, the active supergiant elliptical radio galaxy NGC 6251, the barred spiral galaxy NGC 6217, and the galaxy known as Polarissima Borealis (NGC 3172), the closest NGC object to the north celestial pole. The Ursa Minor Dwarf is one of the small satellite galaxies of our Milky Way Galaxy, at a distance of about 240,000 light years. Somewhat anomalously, it appears to contain morphological substructure in the form of a second peak in the stellar number density. The Ursa Minor Dwarf, a dwarf spheroidal galaxy, was discovered by Albert George Wilson of the Lowell Observatory in the Palomar Sky Survey in 1955. Ursa minor dwarf spheroidal galaxy is a satellite galaxy of our milky way galaxy, its distance from sun is 225,000 light-years. In other words, as a galaxy it is fainter than some individual stars in the Milky Way such as Deneb and roughly comparable in luminosity to Rigel.It shares some similarities with the Sextans dwarf galaxy.Both galaxies are very old and poor in metal.. These HST observations indicate that Ursa Minor has had a very simple star formation history consisting mainly of a single major burst of star formation about 14 Gyr ago which lasted approximately < 2 Gyr. Another dwarf galaxy, the farthest satellite galaxy, is the Leo I dwarf galaxy: The newest member of our satellite galaxies is the Pegasus Dwarf Galaxy. Previous works have shown Ursa Minor Dwarf - dwarf spheroidal galaxy discovered for Earth by Terran A.G. Wilson of the Lowell Observatory in 1954 CE . Somewhat anomalously, it appears to contain morphological substructure in the form of a second peak in the stellar number density. Our data sample the galaxy out to 400 from its cen-ter, which is on the order of its tidal radius (see Irwin & Ha-tzidimitriou 1995; Kleyna et al. The Munoz 1 globular cluster is seen to the right of the Ursa Minor dwarf galaxy in this image from the Canada-France-Hawaii Telescope MegaCam imager. It is mostly comprised out of old stars and it seems to house little ongoing star formation. It does, however, contain a few interesting deeps-sky objects. The Milky Way is the galaxy where our Earth exists. 個名嚟自: 奶、冬天、街、路 : 質量: 自轉週期: 87,000,000,000 日 (曆法) 母星體: 人馬座A* : 子星體: Draco Dwarf、Leo IV、Leo V、Ursa Minor Dwarf、Sagittarius Dwarf Elliptical Galaxy、Sextans Dwarf Spheroidal、Ursa Major I Dwarf、Sculptor Dwarf Galaxy、Ursa Major II Dwarf、Pisces II、Canis Major Dwarf Galaxy、Hercules Dwarf、Canes Venatici II、Leo II . We use a large set of radial velocities in the Ursa Minor and Draco dwarf spheroidal galaxies to search for binary stars and to infer the binary frequency. In this work we investigate the star formation history of the Ursa Minor spheroidal galaxy using archival Hubble Space Telescope WFPC2 data. 2001). The excellent match between Ursa Minor and M92 confirms that the median stellar population of the UMi dSph galaxy is metal poor ([Fe/H]_UMi ~ [Fe/H]_M92 ~ -2.2 dex) and ancient (age_UMi ~ age_M92 ~ 14 Gyr). STELLAR POPULATIONS Figure 1 shows the V-(B[V) CMD for the full sample. Ursa Minor, (Latin: "Lesser Bear") in astronomy, a constellation of the northern sky, at about 15 hours right ascension and 80° north declination, and seven of whose stars outline the Little Dipper. Polaris (α) - Polaris is the brightest star in the Ursa Minor constellation, and it's one of the most well known stars within our universe too.You'll often see it referred to as the North star, or the North pole star. שביל החלב. The aim of this Letter is to establish an upper dynamical limit on the mass of the putative BH in the Ursa Minor (UMi) dSph galaxy. This group contains more than 50 galaxies (mostly dwarf galaxies). CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): The nearby Ursa Minor dwarf spheroidal (UMi dSph) is one of the most dark matter dominated galaxies known, with a central mass to light ratio M/L ∼ 70. Ursa Minor, (Latin: "Lesser Bear") in astronomy, a constellation of the northern sky, at about 15 hours right ascension and 80° north declination, and seven of whose stars outline the Little Dipper. Geha and Munoz May 11, 2012, 4:20 PM UTC Also see the Local Group of galaxies. The Milky Way is just one galaxy located in a vast cluster of galaxies known as the Local Group. cluster belonging to our galaxy . Ursa Major I Dwarf. The image in this page was obtained by Mischa Schirmer, obtained July 6-9 . It has a binary . Its gravitational field is somewhere between the Milky Way and Andromeda galaxy. #repost @spacewetsuit__Traveling to the heart of the Ursa Minor Dwarf, a satellite galaxy of the Milky Way. : @itscosmoknowledgeFollow us @spacewetsuit for. Ursa Minor Dwarf. The following 3 files are in this category, out of 3 total. Ursa Minor; Media in category "Ursa Minor (constellation)" The following 76 files are in this category, out of 76 total. We have measured 206 radial velocities for 94 probable members in the Ursa Minor dwarf spheroidal galaxy and 167 velocities for 91 probable members in the Draco dwarf spheroidal galaxy. 11.9), a dwarf spheroidal galaxy discovered in 1955, the barred spiral galaxy NGC 6217 (mag. Combining our sample with previously published work for a total of 16 luminous UMi giants, we establish the trends of abundance ratios [X/Fe] as functions of [Fe/H] for 15 elements. The red giant branch (RGB) is visible . These velocities were obtained using the KPNO 4 m telescope with the Hydra multifiber positioner and bench spectrograph in 1992, 1993, and 1994. Media in category "Ursa Minor Dwarf Galaxy". Draco and Ursa Minor dwarf galaxies ESA393148.jpg 8,338 × 4,167; 7.72 MB. It is part of the Ursa Minor constellation , and a satellite galaxy to the Milky Way . 1998; Martı´nez-Delgado et al. It is often argued that this substructure must be transient, because it could not survive for the ~12 Gyr age of . The team found an unexpected clump of slow-moving stars interpreted as the dead remains of one of . The Ursa Minor Dwarf galaxy has an apparent magnitude of 11.9. Evidence for a Sub-Chandrasekhar-mass Type Ia Supernova in the Ursa Minor Dwarf Galaxy Andrew McWilliam1, Anthony L. Piro1, Carles Badenes2, and Eduardo Bravo3 1 The Observatories of the Carnegie Institution for Science, 813 Santa Barbara Street, Pasadena, CA 91101, USA andy@carnegiescience.edu, piro@carnegiescience.edu 3. The Ursa Minor Dwarf galaxy, low surface brightness - posted in Deep Sky Observing: Howdy all; If you are looking for a toughie, this will do it. We identified an X-ray source with a detection confidence as low as ≃ 2.5 σ and with an estimated unabsorbed flux in the 0.5-7 keV . Observations of the Ursa Minor dwarf spheroidal galaxy presented a new complication in the study. This galaxy was discovered .

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