A polarized fast radio burst at low Galactic latitude
We report on the discovery of a new fast radio burst (FRB), FRB 150215, with the Parkes radio telescope on 2015 February 15. The burst was detected in real time with a dispersion measure (DM) of 1105.6 ± 0.8 pc cm-3, a pulse duration of 2.8 +1.2-0.5 -0.5+1.2 ms, and a measured peak flux density assu...
| Autores: | ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; |
|---|---|
| Tipo de documento: | Artículo |
| Fecha de publicación: | 2017 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Lenguaje: | Inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/108686 |
| Acceso en línea: | https://hdl.handle.net/2117/108686 https://dx.doi.org/10.1093/mnras/stx1098 |
| Nivel de acceso: | Acceso abierto |
| Palabra clave: | Neutrinos Radio telescopes Astrophysics Polarization Methods: Data analysis Surveys ISM: structure Neutrins Astrofísica Telescopis Àrees temàtiques de la UPC::Física::Astronomia i astrofísica |
| Sumario: | We report on the discovery of a new fast radio burst (FRB), FRB 150215, with the Parkes radio telescope on 2015 February 15. The burst was detected in real time with a dispersion measure (DM) of 1105.6 ± 0.8 pc cm-3, a pulse duration of 2.8 +1.2-0.5 -0.5+1.2 ms, and a measured peak flux density assuming that the burst was at beam centre of 0.7 +0.2-0.1 -0.1+0.2 Jy. The FRB originated at a Galactic longitude and latitude of 24.66°, 5.28° and 25° away from the Galactic Center. The burst was found to be 43 ± 5¿per¿cent linearly polarized with a rotation measure (RM) in the range -9 < RM < 12¿rad¿m-2 (95¿per¿cent confidence level), consistent with zero. The burst was followed up with 11 telescopes to search for radio, optical, X-ray, ¿-ray and neutrino emission. Neither transient nor variable emission was found to be associated with the burst and no repeat pulses have been observed in 17.25 h of observing. The sightline to the burst is close to the Galactic plane and the observed physical properties of FRB 150215 demonstrate the existence of sight lines of anomalously low RM for a given electron column density. The Galactic RM foreground may approach a null value due to magnetic field reversals along the line of sight, a decreased total electron column density from the Milky Way, or some combination of these effects. A lower Galactic DM contribution might explain why this burst was detectable whereas previous searches at low latitude have had lower detection rates than those out of the plane. |
|---|