M 108 Chandra X-Ray Compact Source Catalog
type: Dataset
description: This table contains a list of discrete sources found in a 60-ks Chandra ACIS-S observation of the isolated edge-on spiral galaxy NGC 3556 (M108). In the reference paper in which the authors present this table, they also give a multiwavelength analysis of the various discrete X-ray sources and of the diffuse X-ray features. Among 33 discrete X-ray sources detected within the IB = 25 mag arcsec-2 isophotal ellipse of the galaxy, the authors identify a candidate for the galactic nucleus, an ultraluminous X-ray source that might be an accreting intermediate-mass black hole, a possible X-ray binary with a radio counterpart, and two radio-bright giant H II regions. They also detect large amounts of extraplanar diffuse X-ray emission, which extend about 10 kpc radially in the disk and >~4 kpc away from the galactic plane. The diffuse X-ray emission exhibits significant substructures, possibly representing various blown-out superbubbles or chimneys of hot gas heated in massive star-forming regions. This Chandra observation of NGC 3556 (observation ID 2025) was taken between 2001 September 8 and 9 for an exposure of 60 ks. The ACIS-S instrument was at the focal plane of the telescope. This table was created by the HEASARC in August 2015 based on the CDS Catalog J/ApJ/598/969 file table2.dat. This is a service provided by NASA HEASARC .
issued: 2025-09-24T23:50:35.571201
modified: 2025-09-10
contact point: Organization
  fn: Tess Jaffe
keyword: AmeriGEO
keyword: AmeriGEOSS
keyword: CKAN
keyword: GEO
keyword: GEOSS
keyword: National
keyword: North America
keyword: United States
keyword: na
theme: {Astrophysics}

Data Information (HTML)
type: Distribution
description: m108cxo.html
format: HTML
issued: 2025-08-30T04:29:53.008995
modified: 2025-09-24T23:50:35.555764
access URL: https://heasarc.gsfc.nasa.gov/W3Browse/all/m108cxo.html
media type: text/html

Data Information (Unknown Format)
type: Distribution
format: BIN
issued: 2025-08-30T04:29:53.008998
modified: 2025-09-24T23:50:35.556923
access URL: https://heasarc.gsfc.nasa.gov/xamin/vo/cone
media type: application/octet-stream

US Migrating
type: Agent