2016A&A...585A..18K


Query : 2016A&A...585A..18K

2016A&A...585A..18K - Astronomy and Astrophysics, volume 585A, 18-18 (2016/1-1)

The peculiar optical-UV X-ray spectra of the X-ray weak quasar PG 0043+039.

KOLLATSCHNY W., SCHARTEL N., ZETZL M., SANTOS-LLEO M., RODRIGUEZ-PASCUAL P.M., BALLO L. and TALAVERA A.

Abstract (from CDS):

The object PG0043+039 has been identified as a broad absorption line (BAL) quasar based on its UV spectra. However, this optical luminous quasar has not been detected before in deep X-ray observations, making it the most extreme X-ray weak quasar known today. This study aims to detect PG0043+039 in a deep X-ray exposure. The question is what causes the extreme X-ray weakness of PG0043+039? Does PG0043+039 show other spectral or continuum peculiarities? We took simultaneous deep X-ray spectra with XMM-Newton, far-ultraviolet (FUV) spectra with the Hubble Space Telescope (HST), and optical spectra of PG0043+039 with the Hobby-Eberly Telescope (HET) and Southern African Large Telescope (SALT) in July, 2013. We have detected PG0043+039 in our X-ray exposure taken in 2013. We presented our first results in a separate paper (Kollatschny et al., 2015A&A...577L...1K). PG0043+039 shows an extreme αox gradient (αox=-2.37). Furthermore, we were able to verify an X-ray flux of this source in a reanalysis of the X-ray data taken in 2005. At that time, it was fainter by a factor of 3.8±0.9 with αox=-2.55. The X-ray spectrum is compatible with a normal quasar power-law spectrum (Γ=1.70–0.45+0.57) with moderate intrinsic absorption (NH=5.5–3.9+6.9x1021cm–2) and reflection. The UV/optical flux of PG0043+039 has increased by a factor of 1.8 compared to spectra taken in the years 1990-1991. The FUV spectrum is highly peculiar and dominated by broad bumps besides Lyα. There is no detectable Lyman edge associated with the BAL absorbing gas seen in the CIV line. PG0043+039 shows a maximum in the overall continuum flux at around λ≃2500Å in contrast to most other AGN where the maximum is found at shorter wavelengths. All the above is compatible with an intrinsically X-ray weak quasar, rather than an absorbed X-ray emission. Besides strong FeII multiplets and broad Balmer and HeI lines in the optical band we only detect a narrow [OII]λ3727 emission line and a BAL system in the CaHλ3968, CaKλ3934 lines (blueshifted by 4900km/s) and in the HeIλ3889 line (blueshifted by 5600km/s).

Abstract Copyright:

Journal keyword(s): galaxies: active - quasars: individual: PG0043+039 - X-rays: galaxies - ultraviolet: galaxies

CDS comments: Paragraph 2.3 Standrad star BD40 not identified.

Simbad objects: 19

goto Full paper

goto View the references in ADS

Number of rows : 19
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 LEDA 87392 Sy1 00 39 15.8341273306 -51 17 01.480962252   15.77 15.28 15.66   ~ 123 0
2 QSO B0043+0354 Sy1 00 45 47.2230875166 +04 10 23.385233220   15.88 16.00     ~ 152 0
3 SDSS J004548.80+041019.0 G 00 45 48.803 +04 10 19.05           ~ 1 0
4 3XMM J004548.8+041018 X 00 45 48.81 +04 10 18.9           ~ 1 0
5 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9944 1
6 ESO 113-45 Sy1 01 23 45.7630391439 -58 48 20.811630442   14.08 13.83 13.34   ~ 799 0
7 3C 84 Sy2 03 19 48.1597607660 +41 30 42.114155434   13.10 12.48 11.09   ~ 3691 3
8 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1592 2
9 HD 289002 * 06 45 13.3726265810 +02 08 14.688016523 10.06 10.62 10.44     B1 236 0
10 LEDA 88588 Sy1 07 08 41.4887418009 -49 33 06.308287663   16.02 15.7 12.7   ~ 450 0
11 NGC 2617 Sy1 08 35 38.7980637155 -04 05 17.902881609   13.6   12.63 13.2 ~ 142 0
12 Mrk 110 Sy1 09 25 12.8479868736 +52 17 10.386808297   16.82 16.41     ~ 530 0
13 LP 961-38 PM* 11 45 20.3070282987 -34 36 46.754601093   14.70 13.33 13.05 11.91 ~ 3 0
14 NGC 4500 bCG 12 31 22.1543090614 +57 57 52.622597281   13.2       ~ 113 0
15 Mrk 231 Sy1 12 56 14.2340989340 +56 52 25.238555193   14.68 13.84     ~ 1858 3
16 Mrk 486 Sy1 15 36 38.4013129866 +54 33 33.214684833   15.21 14.78     ~ 260 0
17 IRAS 17002+5153 Sy1 17 01 24.8267412895 +51 49 20.447125726   15.49 15.12     ~ 366 0
18 2MASS J21145258+0607423 Sy1 21 14 52.5774242314 +06 07 42.435724828   16.06 15.77     ~ 202 0
19 NGC 7583 G 23 17 52.778 +07 22 45.84   14.8       ~ 18 1

To bookmark this query, right click on this link: simbad:objects in 2016A&A...585A..18K and select 'bookmark this link' or equivalent in the popup menu


2021.10.29-00:05:30

© Université de Strasbourg/CNRS

    • Contact