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Titolo: The discovery of quiescent X-ray emission from SAX J1808.4-3658, the transient 2.5 millisecond pulsar
Autore: Stella, L; Campana, S; Mereghetti, S; Ricci, D; Israel, GL;
- Indirizzi:
- Osservatorio Astron Roma, I-00040 Monte Porzio Catone, Italy Osservatorio Astron Roma Monte Porzio Catone Italy I-00040 Catone, Italy Int Ctr Relativist Astrophys, Rome, Italy Int Ctr Relativist Astrophys Rome Italy lativist Astrophys, Rome, Italy Osservatorio Astron Brera, I-23807 Merate, LC, Italy Osservatorio Astron Brera Merate LC Italy I-23807 23807 Merate, LC, Italy CNR, Ist Fis Cosm G Occhialini, I-20133 Milan, Italy CNR Milan Italy I-20133 Ist Fis Cosm G Occhialini, I-20133 Milan, Italy BeppoSAX Sci Data Ctr, I-00131 Rome, Italy BeppoSAX Sci Data Ctr Rome Italy I-00131 i Data Ctr, I-00131 Rome, Italy
- Titolo Testata:
- ASTROPHYSICAL JOURNAL
fascicolo: 2,
volume: 537,
anno: 2000,
parte:, 2
pagine: L115 - L118
- SICI:
- 0004-637X(20000710)537:2<L115:TDOQXE>2.0.ZU;2-W
- Fonte:
- ISI
- Lingua:
- ENG
- Soggetto:
- OUTBURST; SYSTEM;
- Keywords:
- accretion, accretion disks; binaries : close; pulsars : individual (SAX J1808.4-3658); stars : neutron; X-rays : stars;
- Tipo documento:
- Article
- Natura:
- Periodico
- Settore Disciplinare:
- Physical, Chemical & Earth Sciences
- Citazioni:
- 33
- Recensione:
- Indirizzi per estratti:
- Indirizzo: Stella, L Osservatorio Astron Roma, Via Frascati 33, I-00040 Monte Porzio Catone, Italy Osservatorio Astron Roma Via Frascati 33 Monte Porzio CatoneItaly I-00040
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- Citazione:
- L. Stella et al., "The discovery of quiescent X-ray emission from SAX J1808.4-3658, the transient 2.5 millisecond pulsar", ASTROPHYS J, 537(2), 2000, pp. L115-L118
Abstract
We report on a 20 ks BeppoSAX observation of the transient 2.5 ms X-ray pulsar SAX J1808.4-3658 in its quiescent state. A source at a level of similar to 3 x 10(-3) counts s(-1) was detected with the BeppoSAX Medium Energy Concentrator Spectrometer at a position consistent with that of SAX J1808.4-3658. The inferred 0.5-10 keV luminosity was similar to(2-3) x 10(32) ergs s(-1) (for a distance of 4 kpc), a value similar to that measured from other quiescent low-mass X-ray transients hosting an old neutron star. This result is discussed in the light of the propeller and radio pulsar shock emission models for the quiescent emission of these systems.
ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/06/13 alle ore 18:05:20