The X-Ray Pulsar XTE J1858+034 Observed with NuSTAR and Fermi/GBM: Spectral and Timing Characterization plus a Cyclotron Line
نویسندگان
چکیده
Abstract Accreting X-ray pulsars (XRPs) undergo luminous outbursts during which the spectral and timing behavior of neutron star can be studied in detail. We analyze a NuSTAR observation XRP XTE J1858+034 its outburst 2019. The spectrum is fit with phenomenological, semiempirical, physical model. A candidate cyclotron line found at 48 keV, implying magnetic field 5.4 × 10 12 G site emission. This also supported by best-fit propose an orbital period about 81 days based on visual inspection recurrence time. Based Fermi/GBM data, standard disk accretion-torque theory allowed us to infer distance 10.9 ± 1.0 kpc. Pulse profiles are single-peaked show pulsed fraction that strongly energy-dependent least up 40 keV.
منابع مشابه
Nustar Discovery of a Cyclotron Line in the Accreting X-ray Pulsar
The high-mass X-ray binary and accreting X-ray pulsar IGR J16393−4643 was observed by NuSTAR in the 3–79 keV energy band for a net exposure time of 50 ks. We present the results of this observation which enabled the discovery of a cyclotron resonant scattering feature with a centroid energy of 29.3+1.1 −1.3 keV. This allowed us to measure the magnetic field strength of the neutron star for the ...
متن کاملNuSTAR observations of the supergiant X-ray pulsar IGRJ18027-2016: accretion from the stellar wind and possible cyclotron absorption line
We report on the first focused hard X-ray view of the absorbed supergiant system IGRJ18027-2016 performed with the NuSTAR observatory. The pulsations are clearly detected with a period of Pspin = 139.866(1) s and a pulse fraction of about 50-60% at energies from 3 to 80 keV. The source demonstrates an approximately constant X-ray luminosity on a time scale of more than dozen years with an avera...
متن کاملNuSTAR Detection Of A Cyclotron Line In The Supergiant Fast X-ray Transient IGR J17544−2619
We present NuSTAR spectral and timing studies of the Supergiant Fast X-ray Transient (SFXT) IGR J17544−2619. The spectrum is well-described by a ∼ 1 keV blackbody and a hard continuum component, as expected from an accreting X-ray pulsar. We detect a cyclotron line at 17 keV, confirming that the compact object in IGR J17544−2619 is indeed a neutron star. This is the first measurement of the mag...
متن کاملImaging X-ray, Optical, and Infrared Observations of the Transient Anomalous X-ray Pulsar Xte
We report X-ray imaging, timing, and spectral studies of XTE J1810−197, a 5.54 s pulsar discovered by Ibrahim et al. (2003) in recent RXTE observations. In a set of short exposures with the High Resolution Camera on-board the Chandra X-ray Observatory we detect a strongly modulated signal (55±4% pulsed fraction) with the expected period located at (J2000) 180951.08, −194351. 7, with a uncertain...
متن کاملInfrared and X–ray Variability of the Transient Anomalous X-ray Pulsar Xte J1810-197 ⋆
We report on observations aimed at searching for flux variations from the proposed IR counterpart of the Anomalous X–ray Pulsar (AXP) XTE J1810−197. These data, obtained in March 2004 with the adaptive optics camera NAOS-CONICA at the ESO VLT, show that the candidate proposed by Israel et al. (2004) was fainter by ∆H = 0.7 ± 0.2 and ∆Ks = 0.5 ± 0.1 with respect to October 2003, confirming it as...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2021
ISSN: ['2041-8213', '2041-8205']
DOI: https://doi.org/10.3847/1538-4357/abddbc