| dc.creator | VAHRAM CHAVUSHYAN | |
| dc.date | 2008 | |
| dc.date.accessioned | 2023-07-25T16:22:52Z | |
| dc.date.available | 2023-07-25T16:22:52Z | |
| dc.identifier | http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/1037 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/7806237 | |
| dc.description | We report on a spectroscopic analysis of optical sources inside the error circle of the XMM-Newton slew source XMMLS1 J183049.6-123218 (see Ibarra et al., ATel #1527), associated with the unidentifiedINTEGRAL source IGR J18308-1232 (Bird et al. 2007, ApJS, 170, 175). The observations were performed on 2008 June 28, starting at 06:37 UT, with the Boller & Chivens spectrograph mounted on the 2.1m telescope of the Observatorio Astronomico Nacional (San Pedro Martir, Baja California, Mèxico), for a total exposure time of 7200 s. We found that the optical spectrum of source USNO-A2.0 0750-13371563 (with coordinates RA =18 30 49.88, DEC = -12 32 18.7 and magnitude R ~ 17.0) shows a red continuum, possibly absorbed by the Galactic dust along the line of sight; superimposed on this continuum several Balmer, HeI and HeII narrow emission lines at a redshift consistent with zero are apparent. The Halpha emission is detected with an EW ~ 22 Angstrom. This spectrum resembles that of a Cataclysmic Variable (similar to those reported in e.g. Masetti et al. 2006, A&A, 459, 21 and in Masetti et al. 2008, A&A, 482, 113), and the relative strength of the HeII 4686 Angstrom emission suggests the presence of a magnetic white dwarf in this system. Thus we identify the object USNO-A2.0 0750-13371563 as the optical counterpart of the hard X-ray source IGR J18308-1232, and as a new, possibly magnetic, Cataclysmic Variable. | |
| dc.format | application/pdf | |
| dc.language | eng | |
| dc.publisher | The astronomer's telegram | |
| dc.relation | citation:Parisi, P., et al., (2008). Optical identification of IGR J18308-1232 as a cataclysmic variable, The astronomer's telegram, No.1710 | |
| dc.rights | info:eu-repo/semantics/openAccess | |
| dc.rights | http://creativecommons.org/licenses/by-nc-nd/4.0 | |
| dc.subject | info:eu-repo/classification/cti/1 | |
| dc.subject | info:eu-repo/classification/cti/21 | |
| dc.subject | info:eu-repo/classification/cti/21 | |
| dc.title | Optical identification of IGR J18308-1232 as a cataclysmic variable | |
| dc.type | info:eu-repo/semantics/article | |
| dc.type | info:eu-repo/semantics/acceptedVersion | |
| dc.audience | students | |
| dc.audience | researchers | |
| dc.audience | generalPublic | |
