The Open UniversitySkip to content
 

The identification of the optical/IR counterpart of the 15.8-s transient X-ray pulsar XTE J1946+274

Verrecchia, F.; Israel, G. L.; Negueruela, I.; Covino, S.; Polcaro, V. F.; Clark, J. S.; Steele, I. A.; Gualandi, R.; Speziali, R. and Stella, L. (2002). The identification of the optical/IR counterpart of the 15.8-s transient X-ray pulsar XTE J1946+274. Astronomy & Astrophysics, 393(3) pp. 983–989.

Full text available as:
[img]
Preview
PDF (Version of Record) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (640Kb)
DOI (Digital Object Identifier) Link: http://doi.org/10.1051/0004-6361:20021087
Google Scholar: Look up in Google Scholar

Abstract

We report on the discovery of the optical/IR counterpart of the 15.8s transient X-ray pulsar XTE J1946+274. We re-analysed archival BeppoSAX observations of XTE J1946+274, obtaining a new refined position (a circle with 22" radius at 90% confidence level). Based on this new position we carried out optical and infra-red (IR) follow-up observations. Within the new error circle we found a relatively optical faint (B=18.6) IR bright (H=12.1) early type reddened star (V-R=1.6). The optical spectra show strong Hα and Hβ emission lines. The IR photometric observations of the field confirm the presence of an IR excess for the Hα-emitting star (K=11.6, J-H=0.6) which is likely surrounded by a circumstellar envelope. Spectroscopic and photometric data indicate a B0-1V-IVe spectral-type star located at a distance of 8-10kpc and confirm the Be-star/X-ray binary nature of XTE J1946+274.

Item Type: Journal Article
Copyright Holders: 2002 ESO
ISSN: 1432-0746
Keywords: XTE J1946+274; GROJ1944+26; binary stars; pulsars; emission line, Be; stellar X-rays
Academic Unit/Department: Science > Physical Sciences
Science
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 14909
Depositing User: Astrid Peterkin
Date Deposited: 19 Feb 2009 14:38
Last Modified: 23 Feb 2016 22:00
URI: http://oro.open.ac.uk/id/eprint/14909
Share this page:

Altmetrics

Scopus Citations

Download history for this item

These details should be considered as only a guide to the number of downloads performed manually. Algorithmic methods have been applied in an attempt to remove automated downloads from the displayed statistics but no guarantee can be made as to the accuracy of the figures.

▼ Automated document suggestions from open access sources

Actions (login may be required)

Policies | Disclaimer

© The Open University   + 44 (0)870 333 4340   general-enquiries@open.ac.uk