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We present the first sample of 31-GHz selected sources to flux levels of 1 mJy. From late 2005 to mid 2007, the Sunyaev-Zel'dovich Array (SZA) observed 7.7 square degrees of the sky at 31 GHz to a median rms of 0.18 mJy/beam. We identify…

We report the discovery of eight X-ray sources with periodic variability in 487 ks of observations of the Galactic center with Chandra. The sources are identified from a sample of 285 objects detected with 100-4200 net counts. Their periods…

Astrophysics · Physics 2009-11-10 M. P. Muno , F. K. Baganoff , M. W. Bautz , W. N. Brandt , G. P. Garmire , G. R. Ricker , ;

We report results of a serendipitous hard X-ray (3--20 keV), nearly all-sky (|b|>10deg) survey based on RXTE/PCA observations performed during satellite reorientations in 1996--2002. The survey is 80% (90%) complete to a 4$\sigma$ limiting…

Astrophysics · Physics 2009-11-10 M. Revnivtsev , S. Sazonov , K. Jahoda , M. Gilfanov

We present a study of the radio continuum properties of two luminous/ultraluminous infrared galaxy samples: the OH megamaser (OHM) sample (74 objects) and the control sample (128 objects) without detected maser emission. We carried out…

We have previously presented the results of a 325 MHz radio survey of M31, conducted with the A-configuration of the Very Large Array. In this survey, a total of 405 radio sources between <6" and 170" in extent were mapped with a resolution…

Astrophysics · Physics 2009-11-11 Joseph D. Gelfand , T. J. W. Lazio , B. M. Gaensler

Orion Source I (`SrcI') is the protostar at the center of the Kleinmann-Low Nebula. ALMA observations of SrcI with 0.2" angular resolution were made at 350 and 660 GHz to search for the H26alpha and H21alpha hydrogen recombination lines and…

Astrophysics of Galaxies · Physics 2016-12-28 R. L. Plambeck , M. C. H. Wright

We survey four nearby irregular galaxies for radio supernova remnants (SNRs) using deep (1 sigma ~ 20 microJy), high resolution (~20 pc) VLA continuum data at 20, 6, and 3.6 cm. We identify discrete sources in these galaxies and use radio…

Cosmology and Nongalactic Astrophysics · Physics 2009-11-13 Laura Chomiuk , Eric Wilcots

We study the X-ray properties of LINER sources with definite detection of a broad H(alpha) emission line in their optical spectra, LINER 1s from Ho et al. sample. These objects preferentially harbor a low luminosity active nucleus at the…

Astrophysics of Galaxies · Physics 2015-05-28 G. Younes , D. Porquet , B. Sabra , J. N. Reeves

We have identified nine new SNR candidates in M74 with [S II]/H$\alpha$ $\geq$ 0.4 as the basic criterion. We obtain [S II]/H$\alpha$ ratio in the range from 0.40 to 0.91 and H$\alpha$ intensities from 2.8 $\times$ $10^{-15}$ erg cm$^{-2}$…

Astrophysics of Galaxies · Physics 2015-05-18 E. Sonbas , A. Akyuz , S. Balman , M. E. Ozel

We present sensitive 1.3 cm radio continuum observations of the region OMC1 South (OMC-1S) in Orion using the Very Large Array in its B configuration. We detect eleven radio sources clustered in a $30{''} \times 30{''}$ region, of which…

Astrophysics · Physics 2009-11-10 Luis A. Zapata , Luis F. Rodriguez , Stanley E. Kurtz , C. R. O'Dell , Paul T. P. Ho

We present polarization and Faraday rotation for the supernova remnants (SNRs) G46.8-0.3, G43.3-0.2, G41.1-0.3, and G39.2-0.3 in L-band (1-2 GHz) radio continuum in The HI/OH/Recombination line (THOR) survey. We detect polarization from…

Results from the 327-MHz Giant Meterwave Radio Telescope (GMRT) observations of four fields - three fields containing Galactic supernova remnants (SNRs) (G001.4-0.1, G003.8+0.3, and G356.3-1.5) and one field containing a candidate SNR…

Astrophysics · Physics 2009-11-07 Sanjay Bhatnagar

We have measured continuum flux densities of a high-mass protostar candidate, a radio source I in the Orion KL region (Orion Source I) using the Atacama Large Millimeter/Submillimeter Array (ALMA) at band 8 with an angular resolution of…

We have determined detailed radio spectra for 26 compact sources in the starburst nucleus of M82, between 74 and 1.3 cm. Seventeen show low-frequency turnovers. One other has a thermal emission spectrum, and we identify it as an HII region.…

Astrophysics · Physics 2009-10-30 Michael L. Allen , Philipp P. Kronberg

We present 2.1 GHz imaging with the Australia Telescope Compact Array (ATCA) of a 6.5 deg^2 region within the XXM-Newton XXL South field using a band of 1.1-3.1 GHz. We achieve an angular resolution of 4.7" x 4.2" in the final radio…

Cosmic rays are mostly composed of protons accelerated to relativistic speeds. When those protons encounter interstellar material, they produce neutral pions which in turn decay into gamma rays. This offers a compelling way to identify the…

High Energy Astrophysical Phenomena · Physics 2022-08-17 LAT Collaboration , S. Abdollahi , F. Acero , M. Ackermann , L. Baldini , J. Ballet , G. Barbiellini , D. Bastieri , R. Bellazzini , B. Berenji , A. Berretta , E. Bissaldi , R. D. Blandford , R. Bonino , P. Bruel , S. Buson , R. A. Cameron , R. Caputo , P. A. Caraveo , D. Castro , G. Chiaro , N. Cibrario , S. Ciprini , J. Coronado-Blázquez , M. Crnogorcevic , S. Cutini , F. D'Ammando , S. De Gaetano , N. Di Lalla , F. Dirirsa , L. Di Venere , A. Domínguez , S. J. Fegan , A. Fiori , H. Fleischhack , A. Franckowiak , Y. Fukazawa , P. Fusco , V. Gammaldi , F. Gargano , D. Gasparrini , F. Giacchino , N. Giglietto , F. Giordano , M. Giroletti , T. Glanzman , D. Green , I. A. Grenier , M. -H. Grondin , S. Guiriec , M. Gustafsson , A. K. Harding , E. Hays , J. W. Hewitt , D. Horan , X. Hou , G. Jóhannesson , T. Kayanoki , M. Kerr , M. Kuss , S. Larsson , L. Latronico , M. Lemoine-Goumard , J. Li , F. Longo , F. Loparco , P. Lubrano , S. Maldera , D. Malyshev , A. Manfreda , G. Martí-Devesa , M. N. Mazziotta , I. Mereu , P. F. Michelson , N. Mirabal , W. Mitthumsiri , T. Mizuno , M. E. Monzani , A. Morselli , I. V. Moskalenko , E. Nuss , N. Omodei , M. Orienti , E. Orlando , J. F. Ormes , D. Paneque , Z. Pei , M. Persic , M. Pesce-Rollins , R. Pillera , H. Poon , T. A. Porter , G. Principe , S. Rainò , R. Rando , B. Rani , M. Razzano , S. Razzaque , A. Reimer , O. Reimer , T. Reposeur , M. Sánchez-Conde , P. M. Saz Parkinson , L. Scotton , D. Serini , C. Sgrò , E. J. Siskind , G. Spandre , P. Spinelli , K. Sueoka , D. J. Suson , H. Tajima , D. Tak , J. B. Thayer , D. F. Torres , E. Troja , J. Valverde , Z. Wadiasingh , K. Wood , G. Zaharijas

Hard X-ray imaging of the Galactic plane by the INTEGRAL satellite is uncovering large numbers of 20-100 keV "IGR" sources. We present results from Chandra, INTEGRAL, optical, and IR observations of 4 IGR sources: 3 sources in the Norma…

We report on the discovery of two supernova remnants (SNRs) designated G152.4-2.1 and G190.9-2.2, using Canadian Galactic Plane Survey data. The aims of this paper are, first, to present evidence that favours the classification of both…

Astrophysics of Galaxies · Physics 2013-01-15 Tyler Foster , Brendan Cooper , Wolfgang Reich , Roland Kothes , Jennifer West

This paper analyses the radio properties of a subsample of optically obscured (R>25.5) galaxies observed at 24um by the Spitzer Space Telescope within the First Look Survey. 96 F[24um]>0.35 mJy objects out of 510 are found to have a radio…

Astrophysics · Physics 2009-11-13 M. Magliocchetti , P. Andreani , M. A. Zwaan

Using the JVLA, we explored the Galactic center (GC) with a resolution of 0.05" at 33.0 and 44.6 GHz. We detected 64 hyper-compact radio sources (HCRs) in the central parsec. The dense group of HCRs can be divided into three spectral types:…

Astrophysics of Galaxies · Physics 2022-03-09 Jun-Hui Zhao , Mark R. Morris , W. M. Goss