Computer Science – Databases
Scientific paper
Oct 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..587..319w&link_type=abstract
GAMMA 2001: Gamma-Ray Astrophysics 2001. AIP Conference Proceedings, Volume 587, pp. 319-323 (2001).
Computer Science
Databases
2
Gamma-Ray Sources, Gamma-Ray Bursts, Astronomical Catalogs, Atlases, Sky Surveys, Databases, Retrieval Systems, Archives, Etc., Active And Peculiar Galaxies And Related Systems, Radio Sources
Scientific paper
We present multiwavelength data for the variable EGRET sources 3EG J2006-2321 and 3EG J0433+2908. The former is listed as unidentified in the 3rd EGRET Catalog and the latter is listed as an AGN; however, as yet there has been no formal presentation of its broad-band characteristics. The most likely radio counterpart for 3EG J2006-2321 is PMN J2005-2310 (S5=260 mJy) optical observations indicate a V=18.7 point-like counterpart with z=0.83. No X-ray counterpart has been detected, but an upper limit on the X-ray flux is derived from ROSAT data. EGRET data indicate that 3EG J2006-2321 displays strong short-term variability above 100 MeV. These data indicate that 3EG J2006-2321 is probably a blazar. For 3EG J0433+2908, the most likely radio counterpart is 87GB 0430+2859 (S5=481 mJy). This flat-spectrum source was monitored at 2.25 and 8.3 GHz at GBI; the light curves indicate that the source is variable at these frequencies. The optical spectrum of the V=17.8 counterpart is featureless; no redshift is known. A ROSAT source, RX J0433.6+2906, is coincident with the radio position. Based on these data and the evidence that 3EG J0433+2908 is variable above 100 MeV, we confirm that this source is a member of the BL Lac subclass of AGN. .
Eracleous Michael
Foreman John V.
Halpern Jules P.
Reimer Olaf
Thompson Daniel J.
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