A new luminous supersoft X-ray source in NGC 300

2006/08/25 by S. Carpano, J. Wilms, M. Schirmer +1 · 11 citations
Physics and Astronomy · #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Astrophysics and Cosmic Phenomena #Context (archaeology) #Galaxies: Formation, Evolution, Phenomena #Galaxy #History #Physics #ROSAT #Spiral galaxy #astro-ph

paper · pdf · doi:10.1051/0004-6361:20065609

published in Astronomy and Astrophysics 458(3), 747-751 (EDP Sciences) · 5 pages, 3 figures, accepted in A&A

openalex publication_date 2006/08/25 · arxiv created 2006/09/21 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Context.We report the discovery of a new luminous supersoft source, XMMU J005455.0-374117, in the nearby spiral galaxy NGC 300, in XMM-Newton observations performed on 2005 May 22 and on 2005 November 25. The source is not present in ROSAT data nor in the previous XMM-Newton observations of 2000 December/2001 January. The unique luminous supersoft source, XMMU J005510.7-373855, detected in the 1992 May/June ROSAT data and in the 2000/2001 XMM-Newton data, fell below detectability. This source already appeared highly variable in ROSAT observations.

Citations

• X‐Ray Point Sources in the Sombrero Galaxy: Very Soft Sources, the Globular Cluster/Low‐Mass X‐Ray Binary Connection, and an Overview
• Least-squares frequency analysis of unequally spaced data
• Inclination Effects and Beaming in Black Hole X‐Ray Binaries
• Luminous Supersoft X‐Ray Sources in External Galaxies
• Studies in astronomical time series analysis. II - Statistical aspects of spectral analysis of unevenly spaced data
• Black hole winds
• H I in the Galaxy
• GaBoDS: The Garching-Bonn Deep Survey

Cited by

• A Wolf-Rayet/black-hole X-ray binary candidate in NGC 300
• A 33 hour period for the Wolf-Rayet/black hole X-ray binary candidate NGC 300 X-1