| Autor: |
Butler, Suzanne C., Tomsick, John A., Chaty, Sylvain, Heras, Juan A. Z., Rodriguez, Jerome, Walter, Roland, Kaaret, Philip, Kalemci, Emrah, Özbey, Mehtap |
| Jazyk: |
angličtina |
| Rok vydání: |
2008 |
| Předmět: |
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| Popis: |
The International Gamma-Ray Astrophysics Laboratory (INTEGRAL) is discovering hundreds of new hard X-ray sources, many of which remain unidentified. We report on optical spectroscopy of five such sources for which X-ray observations at lower energies (0.5–10 keV) and higher angular resolutions than INTEGRAL have allowed for unique optical counterparts to be located. We find that IGR J16426+6536 and IGR J22292+6647 are Type 1 Seyfert active galactic nuclei (with IGR J16426+6536 further classified as a Seyfert 1.5) which have redshifts of z = 0.323 and z = 0.113, respectively. IGR J18308–1232 is identified as a cataclysmic variable (CV), and we confirm a previous identification of IGR J19267+1325 as a magnetic CV. By comparing the spectrum of IGR J18214–1318 to colors of various types of stars, we conclude that it is probably a high mass X-ray binary. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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