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26 April 2024 |
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EGRET gamma-ray source 2EG J0809+5117, a quasar with redshift of 1.14? | | Xue-Bing Wu
; Qi-Bin Li
; Yong-Heng Zhao
; Li Cao
; | | Date: |
29 Aug 1997 | | Subject: | astro-ph | | Affiliation: | BAO, Beijing | | Abstract: | The low dispersion (400$AA$/mm) spectrum of the optical counterpart of a flat-spectrum radio source 87GB 080315.5+512613, which is one of two possible radio counterparts of 2EG J0809+5117, was obtained recently. The optical counterpart, which is $2.02’’$ away from 87GB 080315.5+512613 and $19.3’$ away from 2EG J0809+5117, was identified as a quasar with redshift of 1.14. We noted that Mattox et al. (1997) suggested the other radio counterpart 87GB 080459.4+495915 (OJ 508), which is $87.1’$ away from 2EG J0809+5117, is the more potential identification, though it was previously suggested to be the identification (with low confidence) of another nearby EGRET source 2EG J0807+4849. Our observation suggests that it is quite possible that 87GB 080315.5+512613 is the identification of 2EG J0809+5117 rather than 87GB 080459.4+495915. But we still can not exclude the possibility of 87GB 080459.4+495915 at present. Moreover, in order to determine whether or not 87GB 080315.5+512613 is a blazar type quasar, the optical polarization and variability measures of its optical counterpart are strongly encouraged. | | Source: | arXiv, astro-ph/9708267 | | Services: | Forum | Review | PDF | Favorites | |
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