A BRIGHT SUBMILLIMETER SOURCE IN THE BULLET CLUSTER (1E0657-56) FIELD DETECTED WITH BLAST

Journal Article · Sun Sep 20 00:00:00 EDT 2009 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/703/1/348· OSTI ID:21372001

Rex, Marie; Devlin, Mark J; Dicker, Simon R; Klein, Jeff ^[1]; Ade, Peter A. R.; Griffin, Matthew; Hargrave, Peter C; Mauskopf, Philip; Pascale, Enzo ^[2]; Aretxaga, Itziar; Hughes, David H; Montana, Alfredo ^[3]; Bock, James J ^[4]; Chapin, Edward L; Halpern, Mark; Marsden, Gaelen ^[5]; Gundersen, Joshua O ^[6]; Martin, Peter G ^[7]; Netterfield, Calvin B ^[8]; Olmi, Luca ^[9]

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1. Department of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, PA 19104 (United States)
2. Department of Physics and Astronomy, Cardiff University, 5 The Parade, Cardiff, CF24 3AA (United Kingdom)
3. Instituto Nacional de AstrofIsica Optica y Electronica (INAOE), Aptdo. Postal 51 y 72000 Puebla (Mexico)
4. Jet Propulsion Laboratory, Pasadena, CA 91109-8099 (United States)
5. Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1 (Canada)
6. Department of Physics, University of Miami, 1320 Campo Sano Drive, Carol Gables, FL 33146 (United States)
7. Canadian Institute for Theoretical Astrophysics, University of Toronto, 60 St. George Street, Toronto, ON M5S 3H8 (Canada)
8. Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto, ON M5S 3H4 (Canada)
9. Istituto di Radioastronomia, Largo E. Fermi 5, I-50125, Firenze (Italy)

We present the 250, 350, and 500 {mu}m detection of bright submillimeter emission in the direction of the Bullet Cluster measured by the Balloon-borne Large-Aperture Submillimeter Telescope (BLAST). The 500 {mu}m 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 {mu}m and 350 {mu}m 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 {mu}m photometry at the position of the AzTEC source is z{sub phot} = 2.9{sup +0.6}{sub -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{sub FIR} = 2 x 10{sup 13} L {sub sun}. 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{sub FIR} <= 10{sup 12} L{sub sun}, consistent with typical luminous infrared galaxies.

• OSTI ID: 21372001
• Journal Information: Astrophysical Journal, Vol. 703, Issue 1; Other Information: DOI: 10.1088/0004-637X/703/1/348; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
BALLOONS
COLOR
EMISSION
EXPLOSIONS
FLUX DENSITY
GALAXIES
GALAXY CLUSTERS
LUMINOSITY
PHOTOMETRY
POINT SOURCES
RED SHIFT
TELESCOPES
AIRCRAFT
OPTICAL PROPERTIES
ORGANOLEPTIC PROPERTIES
PHYSICAL PROPERTIES
RADIATION SOURCES