The Long-Term Variability of the X-Ray Sources in NGC 6946 and NGC 4485/4490

• Published in: The Astrophysical journal. Supplement series Vol. 177; no. 2; pp. 465 - 492
• Main Authors: Fridriksson, Joel K, Homan, Jeroen, Lewin, Walter H. G, Kong, Albert K. H, Pooley, David
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.08.2008

We analyze data from five Chandra observations of the spiral galaxy NGC 6946 and from three Chandra observations of the irregular/spiral interacting galaxy pair NGC 4485/4490, with an emphasis on investigating the long-term variability exhibited by the source populations. We detect 90 point sources...