Results 31 to 40 of about 1,203,775 (345)

Faint X-ray Sources in the Globular Cluster Terzan 5 [PDF]

, 2006
We report our analysis of a Chandra X-ray observation of the rich globular cluster Terzan 5, in which we detect 50 sources to a limiting 1.0-6 keV X-ray luminosity of 3*10^{31} ergs/s within the half-mass radius of the cluster. Thirty-three of these have
C. O. Heinke, D. Pooley, H. N. Cohn, J. E. Grindlay, Johnston H. M., P. M. Lugger, R. Wijnands, W. H. G. Lewin   +7 more
core   +2 more sources

The X-ray emission from Young Stellar Objects in the rho Ophiuchi cloud core as seen by XMM-Newton

, 2004
We observed the main core F of the rho Ophiuchi cloud, an active star-forming region located at ~140 pc, using XMM-Newton with an exposure of 33 ks. We detect 87 X-ray sources within the 30' diameter field-of-view of the it EPIC imaging detector array ...
Allende Prieto, Allende Prieto, André, André, Baraffe, Barsony, Bontemps, Carpenter, Casanova, Cohen, Cushing, Feigelson, Feigelson, Feigelson, Gehrels, Grosso, Grosso, Grosso, Güdel, H. Ozawa, Holweger, Imanishi, Imanishi, Imanishi, Jansen, Kamata, Koyama, Loren, Martín, Martín, Meyer, Mohanty, Mokler, Montmerle, N. Grosso, Neuhäuser, Neuhäuser, Preibisch, T. Montmerle, Tsuboi, Tsuboi, Vuong, Wilking   +42 more
core   +6 more sources

X-RAY EMISSION OF ICRF SOURCES

Odessa Astronomical Publications, 2018
Considering increasing requirements to the coordinates measurement precision by the end of XX century International Astronomical Union commenced implementation of the new astrometric system ICRF (International Celestial Reference Frame) .
V. V. Voitsekhovskiy, A. Tugay, V. V. Tkachuk, S. Yu. Shevchenko   +3 more
doaj   +1 more source

AEGIS: A Multi-wavelength Study of Spitzer Power-law Galaxies

, 2010
This paper analyzes a sample of 489 Spitzer/IRAC sources in the Extended Groth Strip whose spectral energy distributions fit a red power law from 3.6 to 8.0 \micron. The median for sources with known redshift is =1.6.
Ashby, M. L. N., Barmby, P., Fazio, G. G., Georgakakis, A., Ivison, R. J., Konidaris, N. P., Miyazaki, S., Nandra, K., Park, S. Q., Rosario, D. J. V., Willner, S. P.   +10 more
core   +1 more source

Hard X-ray emission from a young massive star-forming cluster [PDF]

, 2002
We report the detection of hard X-ray emission (>2 keV) from a number of point sources associated with the very young massive star-forming region IRAS 19410+2336.
Baraffe, Berghöfer, Beuther, Beuther, Beuther, Beuther, Casanova, Cesaroni, D'Antona, D'Antona, Ducati, Feigelson, Frerking, Garmire, Giacconi, Gregorio-Hetem, Grosso, Guilloteau, H. Beuther, Hamaguchi, Hanson, Hayashi, Hofner, Imanishi, J. Kerp, Kohno, Minier, Montmerle, P. Schilke, Palla, Palla, Preibisch, Ramond, Reid, Rieke, Ryter, Siess, Sridharan, T. Preibisch, T. Stanke, Tsuboi, Tsuboi, Tsuboi, Tsujimoto, Zinnecker   +44 more
core   +2 more sources

The Chandra Local Volume Survey: The X-ray Point Source Catalog of NGC 300

, 2012
We present the source catalog of a new Chandra ACIS-I observation of NGC 300 obtained as part of the Chandra Local Volume Survey. Our 63 ks exposure covers ~88% of the D25 isophote (R~6.3 kpc) and yields a catalog of 95 X-ray point sources detected at ...
A. K. H. Kong, B. Binder, B. F. Williams, Belczynski, Binder, Binder, Blair, Broos, Colbert, D. R. Weisz, Dalcanton, Deharveng, E. D. Skillman, Eracleous, Freeman, Gibson, Gogarten, Hornschemeier, J. J. Dalcanton, Kilgard, Kim, Kong, Kong, Larsen, Lasota, Long, M. Eracleous, Maíz-Apellániz, Muñoz-Mateos, P. P. Plucinsky, Pannuti, Park, Plucinsky, Prestwich, S. F. Anderson, Singh, Skrutskie, Smith, Soria, T. J. Gaetz, Trudolyubov, Tüllmann, Vila-Costas, Williams, Williams, Wilms, Yi   +46 more
core   +1 more source

Chasing the identification of ASCA Galactic Objects (ChIcAGO): An X-ray survey of unidentified sources in the galactic plane. I : Source sample and initial results [PDF]

, 2013
We present the Chasing the Identification of ASCA Galactic Objects (ChIcAGO) survey, which is designed to identify the unknown X-ray sources discovered during the ASCA Galactic Plane Survey (AGPS).
Anderson, G.E., Benjamin, R.A., Brogan, C.L., Chakrabarty, D., Drake, Jeremy J., Drew, J.E., Farrell, S.A., Finley, J.P., Gaensler, B.M., Grindlay, J.E., Hong, J., Kaplan, D.L.A., Lazio, T.J.W.W., Lee, J.C., Mauerhan, J.C., Muno, M.P., Murray, Stephen S., Posselt, B., Slane, P.O., Steeghs, D.T.H., Van Kerkwijk, M.H.   +20 more
core   +4 more sources

The anti‐CRISPR protein AcrIE8.1 inhibits the type I‐E CRISPR‐Cas system by directly binding to the Cascade subunit Cas11

FEBS Letters, EarlyView.
In this study, we present the structure of AcrIE8.1, a previously uncharacterized anti‐CRISPR protein that inhibits the type I‐E CRISPR‐Cas system. Through a combination of structural and biochemical analyses, we demonstrate that AcrIE8.1 directly binds to the Cas11 subunit of the Cascade complex to inhibit the CRISPR‐Cas system.
Young Woo Kang, Hyun Ho Park
wiley   +1 more source

LUMINOUS SUPERSOFT X-RAY SOURCES [PDF]

Annual Review of Astronomy and Astrophysics, 1997
Luminous supersoft X-ray sources were discovered with the Einstein observatory and have been established as an important new class of X-ray binaries on the basis of observations with the Roentgen Satellite (ROSAT). They have extremely soft spectra (equivalent blackbody temperatures of ∼15–80 eV) and are highly luminous (bolometric luminosities of 1036 ...
Kahabka, P., van den Heuvel, E.P.J.
openaire   +3 more sources

Structural insights into lacto‐N‐biose I recognition by a family 32 carbohydrate‐binding module from Bifidobacterium bifidum

FEBS Letters, EarlyView.
Bifidobacterium bifidum establishes symbiosis with infants by metabolizing lacto‐N‐biose I (LNB) from human milk oligosaccharides (HMOs). The extracellular multidomain enzyme LnbB drives this process, releasing LNB via its catalytic glycoside hydrolase family 20 (GH20) lacto‐N‐biosidase domain.
Xinzhe Zhang, Naoki Sunagawa, Toma Kashima, Kiyohiko Igarashi, Akimasa Miyanaga, Shinya Fushinobu   +5 more
wiley   +1 more source