MAXI J1621-501 is the first Swift/XRT Deep Galactic Plane Survey transient that was followed up with a multitude of space missions (NuSTAR, Swift, Chandra, NICER, INTEGRAL, and MAXI) and ground-based observatories (Gemini, IRSF, and ATCA). The source was discovered with MAXI on 2017 October 19 as a new, unidentified transient. Further observations with NuSTAR revealed two Type I X-ray bursts, identifying MAXI J1621-501 as a low mass x-ray binary with a neutron star primary. Overall, 24 Type I bursts were detected from the source during a 15 month period. At energies below 10 keV, the source spectrum was best fit with three components: an absorbed blackbody with kT = 2.3 keV, a cutoff power law with index Γ = 0.7, and an emission line centered on 6.3 keV. Timing analysis of the X-ray persistent emission and burst data has not revealed coherent pulsations from the source or an orbital period. We identified, however, a super-orbital period ∼78 days in the source X-ray light curve. This period agrees very well with the theoretically predicted radiative precession period of ∼82 days. Thus, MAXI J1621-501 joins a small group of sources characterized with super-orbital periods.

Gorgone N.M., Kouveliotou C., Negoro H., Wijers R.A.M.J., Bozzo E., Guiriec S., et al. (2019). Discovery and Identification of MAXI J1621-501 as a Type i X-Ray Burster with a Super-orbital Period. THE ASTROPHYSICAL JOURNAL, 884(26), 168 [10.3847/1538-4357/ab3e43].

Discovery and Identification of MAXI J1621-501 as a Type i X-Ray Burster with a Super-orbital Period

Mazzola S.;
2019

Abstract

MAXI J1621-501 is the first Swift/XRT Deep Galactic Plane Survey transient that was followed up with a multitude of space missions (NuSTAR, Swift, Chandra, NICER, INTEGRAL, and MAXI) and ground-based observatories (Gemini, IRSF, and ATCA). The source was discovered with MAXI on 2017 October 19 as a new, unidentified transient. Further observations with NuSTAR revealed two Type I X-ray bursts, identifying MAXI J1621-501 as a low mass x-ray binary with a neutron star primary. Overall, 24 Type I bursts were detected from the source during a 15 month period. At energies below 10 keV, the source spectrum was best fit with three components: an absorbed blackbody with kT = 2.3 keV, a cutoff power law with index Γ = 0.7, and an emission line centered on 6.3 keV. Timing analysis of the X-ray persistent emission and burst data has not revealed coherent pulsations from the source or an orbital period. We identified, however, a super-orbital period ∼78 days in the source X-ray light curve. This period agrees very well with the theoretically predicted radiative precession period of ∼82 days. Thus, MAXI J1621-501 joins a small group of sources characterized with super-orbital periods.
Settore FIS/05 - Astronomia E Astrofisica
Gorgone N.M., Kouveliotou C., Negoro H., Wijers R.A.M.J., Bozzo E., Guiriec S., et al. (2019). Discovery and Identification of MAXI J1621-501 as a Type i X-Ray Burster with a Super-orbital Period. THE ASTROPHYSICAL JOURNAL, 884(26), 168 [10.3847/1538-4357/ab3e43].
File in questo prodotto:
File Dimensione Formato  
1908.03590.pdf

accesso aperto

Descrizione: Articolo principale
Tipologia: Pre-print
Dimensione 10.92 MB
Formato Adobe PDF
10.92 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10447/420556
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 0
social impact