A bright submillimeter source in the bullet cluster (1e0657-56) field detected with blast

Marie Rex, Peter A.R. Ade, Itziar Aretxaga, James J. Bock, Edward L. Chapin, Mark J. Devlin, Simon R. Dicker, Matthew Griffin, Joshua O. Gundersen, Mark Halpern, Peter C. Hargrave, David H. Hughes, Jeff Klein, Gaelen Marsden, Peter G. Martin, Philip Mauskopf, Alfredo Montãa, Calvin B. Netterfield, Luca Olmi, Enzo PascaleGuillaume Patanchon, Douglas Scott, Christopher Semisch, Nicholas Thomas, Matthew D.P. Truch, Carole Tucker, Gregory S. Tucker, Marco P. Viero, Donald V. Wiebe

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


We present the 250, 350, and 500 μm detection of bright submillimeter emission in the direction of the Bullet Cluster measured by the Balloon-borne Large-Aperture Submillimeter Telescope (BLAST). The 500 μm centroid is coincident with an AzTEC 1.1 mm point-source detection at a position close to the peak lensing magnification produced by the cluster. However, the 250 μm and 350 μm centroids are elongated and shifted toward the south with a differential shift between bands that cannot be explained by pointing uncertainties. We therefore conclude that the BLAST detection is likely contaminated by emission from foreground galaxies associated with the Bullet Cluster. The submillimeter redshift estimate based on 250-1100 μm photometry at the position of the AzTEC source is z phot = 2.9+0.6 -0.3, consistent with the infrared color redshift estimation of the most likely Infrared Array Camera counterpart. These flux densities indicate an apparent far-infrared (FIR) luminosity of L FIR = 2 × 10 13 L. When the amplification due to the gravitational lensing of the cluster is removed, the intrinsic FIR luminosity of the source is found to be L FIR ≤ 1012 L, consistent with typical luminous infrared galaxies.

Original languageEnglish (US)
Pages (from-to)348-353
Number of pages6
JournalAstrophysical Journal
Issue number1
StatePublished - 2009
Externally publishedYes


  • Galaxies: clusters: individual (1E0657-56)
  • Submillimeter

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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