NICER Observations of Thermonuclear Bursts from 4U 1728-34: Detection of Oscillations prior to the Onset of Two Bursts

Autores
Bostanci, Z. Funda; Boztepe, Tugba; Güver, Tolga; Strohmayer, Tod E.; Cavecchi, Yuri; Gögüs, Ersin; Altamirano, Diego; Bult, Peter; Chakrabarty, Deepto; Guillot, Sebastien; Jaisawal, Gaurava K.; Malacaria, Christian; Mancuso, Giulio Cesare; Sanna, Andrea; Swank, Jean H.
Año de publicación
2023
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present temporal and time-resolved spectral analyses of all the thermonuclear X-ray bursts observed from the neutron star low-mass X-ray binary 4U 1728−34 with NICER from 2017 June to 2019 September. In total, we detected 11 X-ray bursts from the source and performed time-resolved spectroscopy. Unlike some of the earlier results for other bursting sources from NICER, our spectral results indicate that the use of a scaling factor for the persistent emission is not statistically necessary. This is primarily a result of the strong interstellar absorption in the line of sight toward 4U 1728−34, which causes the count rates to be significantly lower at low energies. We also searched for burst oscillations and detected modulations in six different bursts at around the previously known burst oscillation frequency of 363 Hz. Finally, we report the detection of oscillations prior to two bursts at 356 and 359 Hz, respectively. This is the first time in the literature where burst oscillations are detected before the rapid rise in X-ray flux, from any known burster. These oscillations disappear as soon as the burst starts to rise and occur at a somewhat lower frequency than the oscillations we detect during the bursts.
Fil: Bostanci, Z. Funda. Istanbul Üniversitesi; Turquía
Fil: Boztepe, Tugba. Istanbul Üniversitesi; Turquía
Fil: Güver, Tolga. Istanbul Üniversitesi; Turquía
Fil: Strohmayer, Tod E.. Nasa Goddard Space Flight Center; Estados Unidos
Fil: Cavecchi, Yuri. Universidad Politécnica de Catalunya; España
Fil: Gögüs, Ersin. Sabanci Üniversitesi; Turquía
Fil: Altamirano, Diego. University of Southampton; Reino Unido
Fil: Bult, Peter. University of Maryland; Estados Unidos
Fil: Chakrabarty, Deepto. MIT Kavli Institute For Astrophysics And Space Research; Estados Unidos
Fil: Guillot, Sebastien. Cnes Centre National D'etudes Spatiales; Francia
Fil: Jaisawal, Gaurava K.. Technical University of Denmark; Dinamarca
Fil: Malacaria, Christian. International Space Science Institute; Suiza
Fil: Mancuso, Giulio Cesare. Universidad Nacional de La Plata; Argentina. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina
Fil: Sanna, Andrea. Università Degli Studi Di Cagliari; Italia
Fil: Swank, Jean H.. Nasa Goddard Space Flight Center; Estados Unidos
Materia
NEUTRON STARS
X-RAY BURSTS
LOW-MASS X-RAY BINARY STARS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/228822
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/228822
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling NICER Observations of Thermonuclear Bursts from 4U 1728-34: Detection of Oscillations prior to the Onset of Two BurstsBostanci, Z. FundaBoztepe, TugbaGüver, TolgaStrohmayer, Tod E.Cavecchi, YuriGögüs, ErsinAltamirano, DiegoBult, PeterChakrabarty, DeeptoGuillot, SebastienJaisawal, Gaurava K.Malacaria, ChristianMancuso, Giulio CesareSanna, AndreaSwank, Jean H.NEUTRON STARSX-RAY BURSTSLOW-MASS X-RAY BINARY STARShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We present temporal and time-resolved spectral analyses of all the thermonuclear X-ray bursts observed from the neutron star low-mass X-ray binary 4U 1728−34 with NICER from 2017 June to 2019 September. In total, we detected 11 X-ray bursts from the source and performed time-resolved spectroscopy. Unlike some of the earlier results for other bursting sources from NICER, our spectral results indicate that the use of a scaling factor for the persistent emission is not statistically necessary. This is primarily a result of the strong interstellar absorption in the line of sight toward 4U 1728−34, which causes the count rates to be significantly lower at low energies. We also searched for burst oscillations and detected modulations in six different bursts at around the previously known burst oscillation frequency of 363 Hz. Finally, we report the detection of oscillations prior to two bursts at 356 and 359 Hz, respectively. This is the first time in the literature where burst oscillations are detected before the rapid rise in X-ray flux, from any known burster. These oscillations disappear as soon as the burst starts to rise and occur at a somewhat lower frequency than the oscillations we detect during the bursts.Fil: Bostanci, Z. Funda. Istanbul Üniversitesi; TurquíaFil: Boztepe, Tugba. Istanbul Üniversitesi; TurquíaFil: Güver, Tolga. Istanbul Üniversitesi; TurquíaFil: Strohmayer, Tod E.. Nasa Goddard Space Flight Center; Estados UnidosFil: Cavecchi, Yuri. Universidad Politécnica de Catalunya; EspañaFil: Gögüs, Ersin. Sabanci Üniversitesi; TurquíaFil: Altamirano, Diego. University of Southampton; Reino UnidoFil: Bult, Peter. University of Maryland; Estados UnidosFil: Chakrabarty, Deepto. MIT Kavli Institute For Astrophysics And Space Research; Estados UnidosFil: Guillot, Sebastien. Cnes Centre National D'etudes Spatiales; FranciaFil: Jaisawal, Gaurava K.. Technical University of Denmark; DinamarcaFil: Malacaria, Christian. International Space Science Institute; SuizaFil: Mancuso, Giulio Cesare. Universidad Nacional de La Plata; Argentina. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; ArgentinaFil: Sanna, Andrea. Università Degli Studi Di Cagliari; ItaliaFil: Swank, Jean H.. Nasa Goddard Space Flight Center; Estados UnidosIOP Publishing2023-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/228822Bostanci, Z. Funda; Boztepe, Tugba; Güver, Tolga; Strohmayer, Tod E.; Cavecchi, Yuri; et al.; NICER Observations of Thermonuclear Bursts from 4U 1728-34: Detection of Oscillations prior to the Onset of Two Bursts; IOP Publishing; Astrophysical Journal; 958; 1; 11-2023; 1-140004-637XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.3847/1538-4357/acfc4cinfo:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/1538-4357/acfc4cinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:09:00Zoai:ri.conicet.gov.ar:11336/228822instacron: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:34982025-09-03 10:09:01.236CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv NICER Observations of Thermonuclear Bursts from 4U 1728-34: Detection of Oscillations prior to the Onset of Two Bursts
title NICER Observations of Thermonuclear Bursts from 4U 1728-34: Detection of Oscillations prior to the Onset of Two Bursts
spellingShingle NICER Observations of Thermonuclear Bursts from 4U 1728-34: Detection of Oscillations prior to the Onset of Two Bursts
Bostanci, Z. Funda
NEUTRON STARS
X-RAY BURSTS
LOW-MASS X-RAY BINARY STARS
title_short NICER Observations of Thermonuclear Bursts from 4U 1728-34: Detection of Oscillations prior to the Onset of Two Bursts
title_full NICER Observations of Thermonuclear Bursts from 4U 1728-34: Detection of Oscillations prior to the Onset of Two Bursts
title_fullStr NICER Observations of Thermonuclear Bursts from 4U 1728-34: Detection of Oscillations prior to the Onset of Two Bursts
title_full_unstemmed NICER Observations of Thermonuclear Bursts from 4U 1728-34: Detection of Oscillations prior to the Onset of Two Bursts
title_sort NICER Observations of Thermonuclear Bursts from 4U 1728-34: Detection of Oscillations prior to the Onset of Two Bursts
dc.creator.none.fl_str_mv Bostanci, Z. Funda
Boztepe, Tugba
Güver, Tolga
Strohmayer, Tod E.
Cavecchi, Yuri
Gögüs, Ersin
Altamirano, Diego
Bult, Peter
Chakrabarty, Deepto
Guillot, Sebastien
Jaisawal, Gaurava K.
Malacaria, Christian
Mancuso, Giulio Cesare
Sanna, Andrea
Swank, Jean H.
author Bostanci, Z. Funda
author_facet Bostanci, Z. Funda
Boztepe, Tugba
Güver, Tolga
Strohmayer, Tod E.
Cavecchi, Yuri
Gögüs, Ersin
Altamirano, Diego
Bult, Peter
Chakrabarty, Deepto
Guillot, Sebastien
Jaisawal, Gaurava K.
Malacaria, Christian
Mancuso, Giulio Cesare
Sanna, Andrea
Swank, Jean H.
author_role author
author2 Boztepe, Tugba
Güver, Tolga
Strohmayer, Tod E.
Cavecchi, Yuri
Gögüs, Ersin
Altamirano, Diego
Bult, Peter
Chakrabarty, Deepto
Guillot, Sebastien
Jaisawal, Gaurava K.
Malacaria, Christian
Mancuso, Giulio Cesare
Sanna, Andrea
Swank, Jean H.
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv NEUTRON STARS
X-RAY BURSTS
LOW-MASS X-RAY BINARY STARS
topic NEUTRON STARS
X-RAY BURSTS
LOW-MASS X-RAY BINARY STARS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We present temporal and time-resolved spectral analyses of all the thermonuclear X-ray bursts observed from the neutron star low-mass X-ray binary 4U 1728−34 with NICER from 2017 June to 2019 September. In total, we detected 11 X-ray bursts from the source and performed time-resolved spectroscopy. Unlike some of the earlier results for other bursting sources from NICER, our spectral results indicate that the use of a scaling factor for the persistent emission is not statistically necessary. This is primarily a result of the strong interstellar absorption in the line of sight toward 4U 1728−34, which causes the count rates to be significantly lower at low energies. We also searched for burst oscillations and detected modulations in six different bursts at around the previously known burst oscillation frequency of 363 Hz. Finally, we report the detection of oscillations prior to two bursts at 356 and 359 Hz, respectively. This is the first time in the literature where burst oscillations are detected before the rapid rise in X-ray flux, from any known burster. These oscillations disappear as soon as the burst starts to rise and occur at a somewhat lower frequency than the oscillations we detect during the bursts.
Fil: Bostanci, Z. Funda. Istanbul Üniversitesi; Turquía
Fil: Boztepe, Tugba. Istanbul Üniversitesi; Turquía
Fil: Güver, Tolga. Istanbul Üniversitesi; Turquía
Fil: Strohmayer, Tod E.. Nasa Goddard Space Flight Center; Estados Unidos
Fil: Cavecchi, Yuri. Universidad Politécnica de Catalunya; España
Fil: Gögüs, Ersin. Sabanci Üniversitesi; Turquía
Fil: Altamirano, Diego. University of Southampton; Reino Unido
Fil: Bult, Peter. University of Maryland; Estados Unidos
Fil: Chakrabarty, Deepto. MIT Kavli Institute For Astrophysics And Space Research; Estados Unidos
Fil: Guillot, Sebastien. Cnes Centre National D'etudes Spatiales; Francia
Fil: Jaisawal, Gaurava K.. Technical University of Denmark; Dinamarca
Fil: Malacaria, Christian. International Space Science Institute; Suiza
Fil: Mancuso, Giulio Cesare. Universidad Nacional de La Plata; Argentina. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina
Fil: Sanna, Andrea. Università Degli Studi Di Cagliari; Italia
Fil: Swank, Jean H.. Nasa Goddard Space Flight Center; Estados Unidos
description We present temporal and time-resolved spectral analyses of all the thermonuclear X-ray bursts observed from the neutron star low-mass X-ray binary 4U 1728−34 with NICER from 2017 June to 2019 September. In total, we detected 11 X-ray bursts from the source and performed time-resolved spectroscopy. Unlike some of the earlier results for other bursting sources from NICER, our spectral results indicate that the use of a scaling factor for the persistent emission is not statistically necessary. This is primarily a result of the strong interstellar absorption in the line of sight toward 4U 1728−34, which causes the count rates to be significantly lower at low energies. We also searched for burst oscillations and detected modulations in six different bursts at around the previously known burst oscillation frequency of 363 Hz. Finally, we report the detection of oscillations prior to two bursts at 356 and 359 Hz, respectively. This is the first time in the literature where burst oscillations are detected before the rapid rise in X-ray flux, from any known burster. These oscillations disappear as soon as the burst starts to rise and occur at a somewhat lower frequency than the oscillations we detect during the bursts.
publishDate 2023
dc.date.none.fl_str_mv 2023-11
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/11336/228822
Bostanci, Z. Funda; Boztepe, Tugba; Güver, Tolga; Strohmayer, Tod E.; Cavecchi, Yuri; et al.; NICER Observations of Thermonuclear Bursts from 4U 1728-34: Detection of Oscillations prior to the Onset of Two Bursts; IOP Publishing; Astrophysical Journal; 958; 1; 11-2023; 1-14
0004-637X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/228822
identifier_str_mv Bostanci, Z. Funda; Boztepe, Tugba; Güver, Tolga; Strohmayer, Tod E.; Cavecchi, Yuri; et al.; NICER Observations of Thermonuclear Bursts from 4U 1728-34: Detection of Oscillations prior to the Onset of Two Bursts; IOP Publishing; Astrophysical Journal; 958; 1; 11-2023; 1-14
0004-637X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.3847/1538-4357/acfc4c
info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/1538-4357/acfc4c
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 IOP Publishing
publisher.none.fl_str_mv IOP Publishing
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv 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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score 13.13397

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