The intriguing nature of the high-energy gamma ray source XSS J12270-4859
- Autores
- De Martino, D.; Falanga, M.; Bonnet-Bidaud, J.-M.; Belloni, T.; Mouchet, M.; Masetti, N.; Andruchow, Ileana; Cellone, Sergio Aldo; Mukai, K.; Matt, G.
- Año de publicación
- 2010
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The nature of the hard X-ray source XSS J12270-4859 is still unclear. It was claimed to be a possible magnetic Cataclysmic Variable of the Intermediate Polar type from its optical spectrum and a possible 860 s X-ray periodicity in RXTE data. However, recent observations do not support the latter variability, leaving this X-ray source still unclassified. To investigate its nature we present a broad-band X-ray and gamma ray study of this source based on a recent XMM-Newton observation and archival INTEGRAL and RXTE data. Using the Fermi/LAT 1-year point source catalogue, we tentatively associate XSS J12270-4859 with 1FGL J1227.9-4852, a source of high energy gamma rays with emission up to 10 GeV. We further complement the study with UV photometry from XMM-Newton and ground-based optical and near-IR photometry. We have analysed both timing and spectral properties in the gamma rays, X-rays, UV and optical/near-IR bands of XSS J12270-4859. The X-ray emission is highly variable showing flares and intensity dips. The flares consist of flare-dip pairs. Flares are detected in both X-rays and UV range whilst the subsequent dips are present only in the X-ray band. Further aperiodic dipping behaviour is observed during X-ray quiescence but not in the UV. The broad-band 0.2--100 keV X-ray/soft gamma ray spectrum is featureless and well described by a power law model with Gamma=1.7. The high energy spectrum from 100 MeV to 10 GeV is represented by a power law index of 2.45. The luminosity ratio between 0.1--100 GeV and 0.2--100 keV is ~ 0.8, indicating that the GeV emission is a significant component of the total energy output. Furthermore, the X-ray spectrum does not greatly change during flares, quiescence and the dips seen in quiescence. The X-ray spectrum however hardens during the post-flare dips, where a partial covering absorber is also required to fit the spectrum. Optical photometry acquired at different epochs reveals a period of 4.32 hr that could be ascribed to the binary orbital period. Near-IR, possibly ellipsoidal, variations are detected. Large amplitude variability on shorter (tens mins) timescales are found to be non-periodic. The observed variability at all wavelengths together with the spectral characteristics strongly favour a low-mass atypical low-luminosity X-ray binary and are against a magnetic Cataclysmic Variable nature. The association with a Fermi/LAT high energy gamma ray source further strengths this interpretation.
Fil: De Martino, D.. Osservatorio Astronomico Di Capodimonte; Italia
Fil: Falanga, M.. International Space Science Institute; Estados Unidos
Fil: Bonnet-Bidaud, J.-M.. Cea Saclay; Francia
Fil: Belloni, T.. Osservatorio Astronomico Di Brera; Italia
Fil: Mouchet, M.. Université Paris Diderot - Paris 7; Francia
Fil: Masetti, N.. Centre National de la Recherche Scientifique. Observatoire de Paris. Laboratoire de L`univers Et Ses Theories; Francia. Inaf Istituto Di Astrofisica Spaziale E Fisica Cosmica, Bologna; Italia
Fil: Andruchow, Ileana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Cellone, Sergio Aldo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Mukai, K.. Nasa Goddard Space Flight Center; Estados Unidos. University Of Maryland, Baltimore; Estados Unidos
Fil: Matt, G.. Università Degli Studi Roma Tre; Italia - Materia
-
Close binaries
XSS J12270-4859 (estrella)
Gamma rays
X-ray binaries
Accretion disks
1FGLJ1227.9-4852 (estrella) - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/69966
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spelling |
The intriguing nature of the high-energy gamma ray source XSS J12270-4859De Martino, D.Falanga, M.Bonnet-Bidaud, J.-M.Belloni, T.Mouchet, M.Masetti, N.Andruchow, IleanaCellone, Sergio AldoMukai, K.Matt, G.Close binariesXSS J12270-4859 (estrella)Gamma raysX-ray binariesAccretion disks1FGLJ1227.9-4852 (estrella)https://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The nature of the hard X-ray source XSS J12270-4859 is still unclear. It was claimed to be a possible magnetic Cataclysmic Variable of the Intermediate Polar type from its optical spectrum and a possible 860 s X-ray periodicity in RXTE data. However, recent observations do not support the latter variability, leaving this X-ray source still unclassified. To investigate its nature we present a broad-band X-ray and gamma ray study of this source based on a recent XMM-Newton observation and archival INTEGRAL and RXTE data. Using the Fermi/LAT 1-year point source catalogue, we tentatively associate XSS J12270-4859 with 1FGL J1227.9-4852, a source of high energy gamma rays with emission up to 10 GeV. We further complement the study with UV photometry from XMM-Newton and ground-based optical and near-IR photometry. We have analysed both timing and spectral properties in the gamma rays, X-rays, UV and optical/near-IR bands of XSS J12270-4859. The X-ray emission is highly variable showing flares and intensity dips. The flares consist of flare-dip pairs. Flares are detected in both X-rays and UV range whilst the subsequent dips are present only in the X-ray band. Further aperiodic dipping behaviour is observed during X-ray quiescence but not in the UV. The broad-band 0.2--100 keV X-ray/soft gamma ray spectrum is featureless and well described by a power law model with Gamma=1.7. The high energy spectrum from 100 MeV to 10 GeV is represented by a power law index of 2.45. The luminosity ratio between 0.1--100 GeV and 0.2--100 keV is ~ 0.8, indicating that the GeV emission is a significant component of the total energy output. Furthermore, the X-ray spectrum does not greatly change during flares, quiescence and the dips seen in quiescence. The X-ray spectrum however hardens during the post-flare dips, where a partial covering absorber is also required to fit the spectrum. Optical photometry acquired at different epochs reveals a period of 4.32 hr that could be ascribed to the binary orbital period. Near-IR, possibly ellipsoidal, variations are detected. Large amplitude variability on shorter (tens mins) timescales are found to be non-periodic. The observed variability at all wavelengths together with the spectral characteristics strongly favour a low-mass atypical low-luminosity X-ray binary and are against a magnetic Cataclysmic Variable nature. The association with a Fermi/LAT high energy gamma ray source further strengths this interpretation.Fil: De Martino, D.. Osservatorio Astronomico Di Capodimonte; ItaliaFil: Falanga, M.. International Space Science Institute; Estados UnidosFil: Bonnet-Bidaud, J.-M.. Cea Saclay; FranciaFil: Belloni, T.. Osservatorio Astronomico Di Brera; ItaliaFil: Mouchet, M.. Université Paris Diderot - Paris 7; FranciaFil: Masetti, N.. Centre National de la Recherche Scientifique. Observatoire de Paris. Laboratoire de L`univers Et Ses Theories; Francia. Inaf Istituto Di Astrofisica Spaziale E Fisica Cosmica, Bologna; ItaliaFil: Andruchow, Ileana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Cellone, Sergio Aldo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Mukai, K.. Nasa Goddard Space Flight Center; Estados Unidos. University Of Maryland, Baltimore; Estados UnidosFil: Matt, G.. Università Degli Studi Roma Tre; ItaliaEDP Sciences2010-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/69966De Martino, D.; Falanga, M.; Bonnet-Bidaud, J.-M.; Belloni, T.; Mouchet, M.; et al.; The intriguing nature of the high-energy gamma ray source XSS J12270-4859; EDP Sciences; Astronomy and Astrophysics; 515; 6-2010; 25-360004-6361CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/200913802info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2010/07/aa13802-09/aa13802-09.htmlinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:40:10Zoai:ri.conicet.gov.ar:11336/69966instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:40:10.466CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
The intriguing nature of the high-energy gamma ray source XSS J12270-4859 |
title |
The intriguing nature of the high-energy gamma ray source XSS J12270-4859 |
spellingShingle |
The intriguing nature of the high-energy gamma ray source XSS J12270-4859 De Martino, D. Close binaries XSS J12270-4859 (estrella) Gamma rays X-ray binaries Accretion disks 1FGLJ1227.9-4852 (estrella) |
title_short |
The intriguing nature of the high-energy gamma ray source XSS J12270-4859 |
title_full |
The intriguing nature of the high-energy gamma ray source XSS J12270-4859 |
title_fullStr |
The intriguing nature of the high-energy gamma ray source XSS J12270-4859 |
title_full_unstemmed |
The intriguing nature of the high-energy gamma ray source XSS J12270-4859 |
title_sort |
The intriguing nature of the high-energy gamma ray source XSS J12270-4859 |
dc.creator.none.fl_str_mv |
De Martino, D. Falanga, M. Bonnet-Bidaud, J.-M. Belloni, T. Mouchet, M. Masetti, N. Andruchow, Ileana Cellone, Sergio Aldo Mukai, K. Matt, G. |
author |
De Martino, D. |
author_facet |
De Martino, D. Falanga, M. Bonnet-Bidaud, J.-M. Belloni, T. Mouchet, M. Masetti, N. Andruchow, Ileana Cellone, Sergio Aldo Mukai, K. Matt, G. |
author_role |
author |
author2 |
Falanga, M. Bonnet-Bidaud, J.-M. Belloni, T. Mouchet, M. Masetti, N. Andruchow, Ileana Cellone, Sergio Aldo Mukai, K. Matt, G. |
author2_role |
author author author author author author author author author |
dc.subject.none.fl_str_mv |
Close binaries XSS J12270-4859 (estrella) Gamma rays X-ray binaries Accretion disks 1FGLJ1227.9-4852 (estrella) |
topic |
Close binaries XSS J12270-4859 (estrella) Gamma rays X-ray binaries Accretion disks 1FGLJ1227.9-4852 (estrella) |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
The nature of the hard X-ray source XSS J12270-4859 is still unclear. It was claimed to be a possible magnetic Cataclysmic Variable of the Intermediate Polar type from its optical spectrum and a possible 860 s X-ray periodicity in RXTE data. However, recent observations do not support the latter variability, leaving this X-ray source still unclassified. To investigate its nature we present a broad-band X-ray and gamma ray study of this source based on a recent XMM-Newton observation and archival INTEGRAL and RXTE data. Using the Fermi/LAT 1-year point source catalogue, we tentatively associate XSS J12270-4859 with 1FGL J1227.9-4852, a source of high energy gamma rays with emission up to 10 GeV. We further complement the study with UV photometry from XMM-Newton and ground-based optical and near-IR photometry. We have analysed both timing and spectral properties in the gamma rays, X-rays, UV and optical/near-IR bands of XSS J12270-4859. The X-ray emission is highly variable showing flares and intensity dips. The flares consist of flare-dip pairs. Flares are detected in both X-rays and UV range whilst the subsequent dips are present only in the X-ray band. Further aperiodic dipping behaviour is observed during X-ray quiescence but not in the UV. The broad-band 0.2--100 keV X-ray/soft gamma ray spectrum is featureless and well described by a power law model with Gamma=1.7. The high energy spectrum from 100 MeV to 10 GeV is represented by a power law index of 2.45. The luminosity ratio between 0.1--100 GeV and 0.2--100 keV is ~ 0.8, indicating that the GeV emission is a significant component of the total energy output. Furthermore, the X-ray spectrum does not greatly change during flares, quiescence and the dips seen in quiescence. The X-ray spectrum however hardens during the post-flare dips, where a partial covering absorber is also required to fit the spectrum. Optical photometry acquired at different epochs reveals a period of 4.32 hr that could be ascribed to the binary orbital period. Near-IR, possibly ellipsoidal, variations are detected. Large amplitude variability on shorter (tens mins) timescales are found to be non-periodic. The observed variability at all wavelengths together with the spectral characteristics strongly favour a low-mass atypical low-luminosity X-ray binary and are against a magnetic Cataclysmic Variable nature. The association with a Fermi/LAT high energy gamma ray source further strengths this interpretation. Fil: De Martino, D.. Osservatorio Astronomico Di Capodimonte; Italia Fil: Falanga, M.. International Space Science Institute; Estados Unidos Fil: Bonnet-Bidaud, J.-M.. Cea Saclay; Francia Fil: Belloni, T.. Osservatorio Astronomico Di Brera; Italia Fil: Mouchet, M.. Université Paris Diderot - Paris 7; Francia Fil: Masetti, N.. Centre National de la Recherche Scientifique. Observatoire de Paris. Laboratoire de L`univers Et Ses Theories; Francia. Inaf Istituto Di Astrofisica Spaziale E Fisica Cosmica, Bologna; Italia Fil: Andruchow, Ileana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina Fil: Cellone, Sergio Aldo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina Fil: Mukai, K.. Nasa Goddard Space Flight Center; Estados Unidos. University Of Maryland, Baltimore; Estados Unidos Fil: Matt, G.. Università Degli Studi Roma Tre; Italia |
description |
The nature of the hard X-ray source XSS J12270-4859 is still unclear. It was claimed to be a possible magnetic Cataclysmic Variable of the Intermediate Polar type from its optical spectrum and a possible 860 s X-ray periodicity in RXTE data. However, recent observations do not support the latter variability, leaving this X-ray source still unclassified. To investigate its nature we present a broad-band X-ray and gamma ray study of this source based on a recent XMM-Newton observation and archival INTEGRAL and RXTE data. Using the Fermi/LAT 1-year point source catalogue, we tentatively associate XSS J12270-4859 with 1FGL J1227.9-4852, a source of high energy gamma rays with emission up to 10 GeV. We further complement the study with UV photometry from XMM-Newton and ground-based optical and near-IR photometry. We have analysed both timing and spectral properties in the gamma rays, X-rays, UV and optical/near-IR bands of XSS J12270-4859. The X-ray emission is highly variable showing flares and intensity dips. The flares consist of flare-dip pairs. Flares are detected in both X-rays and UV range whilst the subsequent dips are present only in the X-ray band. Further aperiodic dipping behaviour is observed during X-ray quiescence but not in the UV. The broad-band 0.2--100 keV X-ray/soft gamma ray spectrum is featureless and well described by a power law model with Gamma=1.7. The high energy spectrum from 100 MeV to 10 GeV is represented by a power law index of 2.45. The luminosity ratio between 0.1--100 GeV and 0.2--100 keV is ~ 0.8, indicating that the GeV emission is a significant component of the total energy output. Furthermore, the X-ray spectrum does not greatly change during flares, quiescence and the dips seen in quiescence. The X-ray spectrum however hardens during the post-flare dips, where a partial covering absorber is also required to fit the spectrum. Optical photometry acquired at different epochs reveals a period of 4.32 hr that could be ascribed to the binary orbital period. Near-IR, possibly ellipsoidal, variations are detected. Large amplitude variability on shorter (tens mins) timescales are found to be non-periodic. The observed variability at all wavelengths together with the spectral characteristics strongly favour a low-mass atypical low-luminosity X-ray binary and are against a magnetic Cataclysmic Variable nature. The association with a Fermi/LAT high energy gamma ray source further strengths this interpretation. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-06 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/69966 De Martino, D.; Falanga, M.; Bonnet-Bidaud, J.-M.; Belloni, T.; Mouchet, M.; et al.; The intriguing nature of the high-energy gamma ray source XSS J12270-4859; EDP Sciences; Astronomy and Astrophysics; 515; 6-2010; 25-36 0004-6361 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/69966 |
identifier_str_mv |
De Martino, D.; Falanga, M.; Bonnet-Bidaud, J.-M.; Belloni, T.; Mouchet, M.; et al.; The intriguing nature of the high-energy gamma ray source XSS J12270-4859; EDP Sciences; Astronomy and Astrophysics; 515; 6-2010; 25-36 0004-6361 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/200913802 info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2010/07/aa13802-09/aa13802-09.html |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
EDP Sciences |
publisher.none.fl_str_mv |
EDP Sciences |
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reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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13.070432 |