2005A&A...442..909G


C.D.S. - SIMBAD4 rel 1.7 - 2020.12.03CET19:47:52

2005A&A...442..909G - Astronomy and Astrophysics, volume 442, 909-915 (2005/11-2)

An X-ray view of Mrk 705. A borderline narrow-line Seyfert 1 galaxy.

GALLO L.C., BALESTRA I., COSTANTINI E., BOLLER T., BURWITZ V., FERRERO E. and MATHUR S.

Abstract (from CDS):

Mrk 705 exhibits optical properties of both narrow- and broad-line Seyfert 1 galaxies. We examine the X-ray properties of this borderline object utilising proprietary and public data from Chandra, ASCA, ROSAT and RXTE, spanning more than twelve years. Though long-term flux variability from the pointed observations appears rather modest (∼3x), we do find examples of rare large amplitude outbursts in the RXTE monitoring data. There is very little evidence of long-term spectral variability as the low- and high-energy spectra appear constant with time. A ∼6.4 keV emission line is detected in the ASCA spectra of Mrk 705, but not during the later, higher flux state Chandra observation. However, the upper limit on the equivalent width of a line in the Chandra spectrum is consistent with a constant-flux emission line and a brighter continuum, suggesting that the line is emitted from distant material such as the putative torus. Overall, the X-ray properties of Mrk 705 appear typical of BLS1 activity.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: individual: Mrk 705 - galaxies: nuclei - X-rays: galaxies

Simbad objects: 2

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Number of rows : 2

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 Mrk 705 Sy1 09 26 03.2700194281 +12 44 03.727016859   15.15 14.60     ~ 280 0
2 2MASX J09260351+1243341 G 09 26 03.516 +12 43 34.11           ~ 2 0

    Equat.    Gal    SGal    Ecl

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2020.12.03-19:47:52

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