منابع مشابه
Unveiling the nature of three INTEGRAL sources through optical spectroscopy ⋆
The results of an optical spectroscopy campaign performed at the Astronomical Observatory of Bologna in Loiano (Italy) on three hard X–ray sources detected by INTEGRAL (IGR J17303−0601, IGR J18027−1455 and IGR J21247+5058) are presented. These data have allowed a determination of the nature for two of them, with IGR J17303−0601 being a low mass X–ray binary in the Galaxy and IGR J18027−1455 a b...
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The TAF subunits of TFIID mediate activation of subsets of the eukaryotic genome. Recent results demonstrate that TFIID is recruited to promoters in an activator-specific manner involving functional interaction between upstream regulatory elements and the core promoter, thereby coordinating the expression of distinct sets of genes.
متن کاملUnveiling the nature of INTEGRAL objects through optical spectroscopy . II . The nature of four unidentified sources ⋆
We present the results of our optical spectrophotometric campaign ongoing at the Astronomical Observatory of Bologna in Loiano (Italy) on hard X-ray sources detected by INTEGRAL. We observed spec-troscopically the putative optical counterparts of four more INTEGRAL sources, IGR J12391−1610, IGR J18406−0539, 2E 1853.7+1534 and IGR J19473+4452. These data have allowed us to determine their nature...
متن کاملUnveiling the nature of INTEGRAL sources through optical spectroscopy
Since its launch on October 2002 the INTEGRAL satellite is performing an deep survey of the hard X–ray sky with unprecedented sensitivity and positional accuracy. This allowed pinpointing, through positional cross-correlation with catalogs at longer wavelengths, possible optical/near-infrared candidates for the hard X–ray sources of still unknown nature. In this presentation I will describe thi...
متن کاملUnveiling the nature of RX J0002+6246 with XMM-Newton
The X-ray source RX J0002+6246 was discovered close to the supernova remnant CTB 1 in a ROSAT observation performed in 1992. The source phenomenology (soft spectrum, apparent lack of counterparts, possible pulsations at 242 ms, hints for surrounding diffuse emission) led to interpret it as an isolated neutron star in a new supernova remnant. We have analysed an archival XMM-Newton observation p...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2010
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201014954