Search Results - (Author, Cooperation:D. A. Frail)
-
1Latest Papers from Table of Contents or Articles in PressB. A. Zauderer ; E. Berger ; A. M. Soderberg ; A. Loeb ; R. Narayan ; D. A. Frail ; G. R. Petitpas ; A. Brunthaler ; R. Chornock ; J. M. Carpenter ; G. G. Pooley ; K. Mooley ; S. R. Kulkarni ; R. Margutti ; D. B. Fox ; E. Nakar ; N. A. Patel ; N. H. Volgenau ; T. L. Culverhouse ; M. F. Bietenholz ; M. P. Rupen ; W. Max-Moerbeck ; A. C. Readhead ; J. Richards ; M. Shepherd ; S. Storm ; C. L. Hull
Nature Publishing Group (NPG)
Published 2011Staff ViewPublication Date: 2011-08-26Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsPublished by: -
2Articles: DFG German National LicensesKulkarni, S. R. ; Berger, E. ; Fox, D. W. ; Sako, M. ; Frail, D. A. ; Gal-Yam, A. ; Moon, D. S. ; Cenko, S. B. ; Yost, S. A. ; Phillips, M. M. ; Persson, S. E. ; Freedman, W. L. ; Wyatt, P. ; Jayawardhana, R. ; Paulson, D. ; Soderberg, A. M.
[s.l.] : Macmillian Magazines Ltd.
Published 2004Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Over the six years since the discovery of the γ-ray burst GRB 980425, which was associated with the nearby (distance ∼40 Mpc) supernova 1998bw, astronomers have debated fiercely the nature of this event. Relative to bursts located at cosmological distance (redshift z ≈ 1), ...Type of Medium: Electronic ResourceURL: -
3Articles: DFG German National LicensesBall, S. ; Becker, K. M. ; Clarke, M. ; Frail, D. A. ; Fukuda, T. A. ; Hoffman, I. M. ; Mellon, R. ; Momjian, E. ; Murphy, N. W. ; Teng, S. H. ; Woodruff, T. ; Zauderer, B. A. ; Zavala, R. T. ; Berger, E.
[s.l.] : Macmillian Magazines Ltd.
Published 2001Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Brown dwarfs are not massive enough to sustain thermonuclear fusion of hydrogen at their centres, but are distinguished from gas-giant planets by their ability to burn deuterium. Brown dwarfs older than ∼10 Myr are expected to possess short-lived magnetic fields and to emit radio and ...Type of Medium: Electronic ResourceURL: -
4Articles: DFG German National LicensesPrice, P. A. ; Cenko, S. B. ; Gal-Yam, A. ; Soderberg, A. M. ; Kasliwal, M. ; Leonard, D. C. ; Cameron, P. B. ; Frail, D. A. ; Kulkarni, S. R. ; Murphy, D. C. ; Krzeminski, W. ; Piran, T. ; Lee, B. L. ; Roth, K. C. ; Moon, D.-S. ; Fox, D. B. ; Harrison, F. A. ; Persson, S. E. ; Schmidt, B. P. ; Penprase, B. E. ; Rich, J. ; Peterson, B. A. ; Cowie, L. L. ; Berger, E.
[s.l.] : Nature Publishing Group
Published 2005Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Despite a rich phenomenology, γ-ray bursts (GRBs) are divided into two classes based on their duration and spectral hardness—the long-soft and the short-hard bursts. The discovery of afterglow emission from long GRBs was a watershed event, pinpointing their origin to star-forming ...Type of Medium: Electronic ResourceURL: -
5Articles: DFG German National LicensesChandra, P. ; Ray, A. ; Kulkarni, S. R. ; Frail, D. A. ; Wieringa, M. H. ; Nakar, E. ; Phinney, E. S. ; Miyazaki, Atsushi ; Tsuboi, Masato ; Okumura, Sachiko ; Kawai, N. ; Menten, K. M. ; Bertoldi, F. ; Cameron, P. B.
[s.l.] : Macmillian Magazines Ltd.
Published 2005Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] It was established over a decade ago that the remarkable high-energy transients known as soft γ-ray repeaters (SGRs) are located in our Galaxy and originate from neutron stars with intense (≤ 1015G) magnetic fields—so-called ‘magnetars’. On 27 ...Type of Medium: Electronic ResourceURL: -
6Articles: DFG German National LicensesKulkarni, S. R. ; Pooley, G. ; Frail, D. A. ; McIntyre, V. ; Wark, R. M. ; Sari, R. ; Soderberg, A. M. ; Fox, D. W. ; Yost, S. ; Price, P. A. ; Berger, E.
[s.l.] : Macmillian Magazines Ltd.
Published 2003Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Past studies have suggested that long-duration γ-ray bursts have a ‘standard’ energy of Eγ ≈ 1051 erg in the ultra-relativistic ejecta, after correcting for asymmetries in the explosion (‘jets’). But a group of ...Type of Medium: Electronic ResourceURL: -
7Articles: DFG German National LicensesKulkarni, S. R. ; Djorgovski, S. G. ; Eichelberger, A. C. ; Côté, P. ; Blakeslee, J. P. ; Odewahn, S. C. ; Harrison, F. A. ; Frail, D. A. ; Filippenko, A. V. ; Leonard, D. C. ; Riess, A. G. ; Spinrad, H. ; Stern, D. ; Bunker, A. ; Dey, A. ; Grossan, B. ; Perlmutter, S. ; Knop, R. A. ; Hook, I. M. ; Feroci, M. ; Bloom, J. S.
[s.l.] : Macmillian Magazines Ltd.
Published 1999Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Cosmic γ-ray bursts have now been firmly established as one of the most powerful phenomena in the Universe, releasing almost the rest-mass energy of a neutron star within the space of a few seconds (ref. 1). The two most popular models to explain γ-ray bursts are ...Type of Medium: Electronic ResourceURL: -
8Articles: DFG German National LicensesDjorgovski, S. G. ; Odewahn, S. C. ; Bloom, J. S. ; Gal, R. R. ; Koresko, C. D. ; Harrison, F. A. ; Lubin, L. M. ; Armus, L. ; Sari, R. ; Illingworth, G. D. ; Kelson, D. D. ; Magee, D. K. ; Dokkum, P. G. van ; Frail, D. A. ; Mulchaey, J. S. ; Malkan, M. A. ; McClean, I. S. ; Teplitz, H. I. ; Koerner, D. ; Kirkpatrick, D. ; Kobayashi, N. ; Yadigaroglu, I.-A. ; Halpern, J. ; Piran, T. ; Goodrich, R. W.
[s.l.] : Macmillan Magazines Ltd.
Published 1999Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Long-lived emission, known as afterglow, has now been detected from about a dozen γ-ray bursts. Distance determinations place the bursts at cosmological distances, with redshifts, z, ranging from ∼1 to 3. The energy required to produce these bright γ-ray flashes is enormous: up ...Type of Medium: Electronic ResourceURL: -
9Articles: DFG German National LicensesFrail, D. A. ; Wieringa, M. H. ; Ekers, R. D. ; Sadler, E. M. ; Wark, R. M. ; Higdon, J. L. ; Phinney, E. S. ; Bloom, J. S. ; Kulkarni, S. R.
[s.l.] : Macmillan Magazines Ltd.
Published 1998Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Data accumulated over the past year strongly favour the idea that γ-ray bursts lie at cosmological distances, although the nature of the power source remains unclear. Here we report radio observations of the supernova SN1998bw, which exploded at about the same time, and in about the same ...Type of Medium: Electronic ResourceURL: -
10Articles: DFG German National LicensesRamaprakash, A. N. ; Frail, D. A. ; Koresko, C. ; Kuchner, M. ; Goodrich, R. ; Neugebauer, G. ; Murphy, T. ; Eikenberry, S. ; Bloom, J. S. ; Djorgovski, S. G. ; Waxman, E. ; Frontera, F. ; Feroci, M. ; Nicastro, L. ; Kulkarni, S. R.
[s.l.] : Macmillan Magazines Ltd.
Published 1998Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] The discovery of fading but relatively long-lived X-ray emission accompanying γ-ray bursts has revolutionized the study of these objects. This ‘afterglow’ is most easily explained by models similar to those describing supernovae, but with relativistic ejecta. And as with ...Type of Medium: Electronic ResourceURL: -
11Articles: DFG German National LicensesDjorgovski, S. G. ; Kulkarni, S. R. ; Steidel, C. C. ; Adelberger, K. L. ; Frail, D. A. ; Costa, E. ; Frontera, F. ; Metzger, M. R.
[s.l.] : Macmillan Magazines Ltd.
Published 1997Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Brief, intense bursts of γ-rays occur approximately daily from random directions in space, but their origin has remained unknown since their initial detection almost 25 years ago. Arguments based on their observed isotropy and apparent brightness distribution are not sufficient to ...Type of Medium: Electronic ResourceURL: -
12Articles: DFG German National LicensesFrail, D. A. ; Beasley, A. J. ; Kulkarni, S. R. ; Taylor, G. B.
[s.l.] : Macmillan Magazines Ltd.
Published 1997Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] γ-ray bursts (GRBs) have puzzled astronomers for almost three decades, primarily owing to the lack of identifications at other wavelengths. The detection of a radio counterpart enables application of the powerful technique of very long baseline interferometry (VLBI) to this intriguing ...Type of Medium: Electronic ResourceURL: -
13Articles: DFG German National LicensesStaff View
ISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] The ‘characteristic age’ of a pulsar is usually considered to approximate its true age, but this assumption has led to some puzzling results, including the fact that many pulsars with small characteristic ages have no associated supernova remnants. The pulsar B1757-24 is ...Type of Medium: Electronic ResourceURL: -
14Articles: DFG German National LicensesKulkarni, S. R. ; Nicastro, L. ; Feroci, M. ; Taylor, G. B. ; Frail, D. A.
[s.l.] : Macmillan Magazines Ltd.
Published 1997Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Important insight into the nature of γ-ray bursts (GRBs) has been gained in recent months mainly due to the immediate, precise localization of the bursts and the discovery of relatively long-lived X-ray afterglows by the satellite BeppoSAX. These advances have enabled deep searches which ...Type of Medium: Electronic ResourceURL: -
15Articles: DFG German National LicensesMetzger, M. R. ; Kulkarni, S. R. ; Odewahn, S. C. ; Gal, R. R. ; Pahre, M. A. ; Frail, D. A. ; Feroci, M. ; Costa, E. ; Palazzi, E. ; Djorgovski, S. G.
[s.l.] : Macmillan Magazines Ltd.
Published 1997Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Understanding the nature of the γ-ray burst phenomenon is one of the outstanding problems of modern astrophysics. The identification of counterparts at optical wavelengths is considered a crucial factor for determining the origin of these events. Here we report the detection and temporal ...Type of Medium: Electronic ResourceURL: -
16Articles: DFG German National LicensesStaff View
ISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Soft γ-ray repeaters (SGRs) are transient sources of high-energy photons, whose brief emissions are thought to arise from young and highly magnetized neutron stars. The exact cause of these outbursts, and the nature of the energy-loss mechanism that powers them, remain unknown. Here we ...Type of Medium: Electronic ResourceURL: -
17Articles: DFG German National LicensesDjorgovski, S. G. ; Ramaprakash, A. N. ; Goodrich, R. ; Bloom, J. S. ; Adelberger, K. L. ; Kundic, T. ; Lubin,, L. ; Frail, D. A. ; Frontera, F. ; Feroci, M. ; Nicastro, L. ; Barth, A. J. ; Davis, M. ; Filippenko, A. V. ; Newman, J. ; Kulkarni, S. R.
[s.l.] : Macmillan Magazines Ltd.
Published 1998Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Knowledge of the properties of γ-ray bursts has increased substantially following recent detections of counterparts at X-ray, optical and radio wavelengths. But the nature of the underlying physical mechanism that powers these sources remains unclear. In this context, an important question ...Type of Medium: Electronic ResourceURL: -
18Articles: DFG German National LicensesCordes, J. M. ; Weisberg, J. M. ; Frail, D. A. ; Spangler, S. R. ; Ryan, M.
[s.l.] : Nature Publishing Group
Published 1991Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Dispersion, distance and scattering measurements of pulsars and other radio sources are now sufficiently numerous to allow modelling of the entire galactic distribution of free electrons. A two-component axisymmetric model of local electron density, fitted on all scales from 100 km ...Type of Medium: Electronic ResourceURL: -
19Articles: DFG German National LicensesStaff View
ISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] The 6.2-ms pulsar PSR1257 + 12 (Fig. 1) was discovered during the search at high galactic latitudes for millisecond pulsars conducted in February 1990 with the 305-m Arecibo radiotelescope at a frequency of 430 MHz (ref. 2). The characteristics of this survey and the details of data ...Type of Medium: Electronic ResourceURL: -
20Articles: DFG German National LicensesStaff View
ISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] G5.4- 1.2 is a fan-shaped radio nebula with edge-brightened emission along an incomplete arc towards the west. On the basis of the observed high linear polarization and the negative spectral index, the nebula has been classified as a supernova remnant1 (SNR). A compact source, G5.27-0.90, lies just ...Type of Medium: Electronic ResourceURL: