J/ApJ/794/152 PACS observations of Herschel-BAT sample (Melendez+, 2014)
Herschel far-infrared photometry of the Swift burst alert telescope active
galactic nuclei sample of the local universe.
I. PACS observations.
Melendez M., Mushotzky R.F., Shimizu T.T., Barger A.J., Cowie L.L.
<Astrophys. J., 794, 152 (2014)>
=2014ApJ...794..152M 2014ApJ...794..152M (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; Galaxies, IR ; Photometry, millimetric/submm
Keywords: galaxies: active - galaxies: nuclei - galaxies: Seyfert -
infrared: galaxies - X-rays: galaxies
Abstract:
Far-Infrared (FIR) photometry from the Photodetector Array Camera and
Spectrometer on the Herschel Space Observatory is presented for 313
nearby, hard X-ray selected galaxies from the 58 month Swift Burst
Alert Telescope (BAT) Active Galactic Nuclei catalog. The present data
do not distinguish between the FIR luminosity distributions at 70 and
160µm for Seyfert 1 and Seyfert 2 galaxies. This result suggests
that if the FIR emission is from the nuclear obscuring material
surrounding the accretion disk, then it emits isotropically,
independent of orientation. Alternatively, a significant fraction of
the 70 and 160µm luminosity could be from star formation,
independent of active galactic nucleus (AGN) type. Using a
non-parametric test for partial correlation with censored data, we
find a statistically significant correlation between the AGN intrinsic
power (in the 14-195keV band) and the FIR emission at 70 and 160µm
for Seyfert 1 galaxies. We find no correlation between the 14-195keV
and FIR luminosities in Seyfert 2 galaxies. The observed correlations
suggest two possible scenarios: (1) if we assume that the FIR
luminosity is a good tracer of star formation, then there is a
connection between star formation and the AGN at sub-kiloparsec
scales, or (2) dust heated by the AGN has a statistically significant
contribution to the FIR emission. Using a Spearman rank-order
analysis, the 14-195keV luminosities for the Seyfert 1 and 2 galaxies
are weakly statistically correlated with the F70/F160ratios.
Description:
The sample presented in this work was selected from the low-redshift
(z<0.05) 58 month Swift/BAT survey with a median redshift of z∼0.025
(http://swift.gsfc.nasa.gov/results/bs58mon/). The 58 month Swift/BAT
is an almost uniform hard X-ray all-sky survey and reaches a flux
level of 1.1x10-11 erg/s/cm2 over 50% of the sky and
1.48x10-11erg/s/cm2 over 90% of the sky (Baumgartner et al.
2013, Cat. J/ApJS/207/19). Source identifications are based primarily
on the X-ray imaging data and a correlation with optical images and
catalogs. In some cases, the identifications are based on positional
coincidences with previously known AGNs. The main advantage of the BAT
AGN sample is that the selection process is completely independent of
optical, IR, or radio properties of the host galaxy. Our final sample
of galaxies includes 149 Seyfert 1 galaxies (1/1.2/1.5), 157 Seyfert 2
galaxies (1.8/1.9/2.0), 6 LINERs, and 1 unclassified Seyfert galaxy,
ESO 464-G016.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 130 313 Galaxy sample and far-infrared flux densities
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See also:
J/MNRAS/456/3335 : SPIRE observations of Herschel-BAT sample (Shimizu+, 2016)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 24 A24 --- Name Name
25 A1 --- f_Name [b] Flag on Name (1)
27- 28 I2 h RAh Right Ascension (J2000)
30- 31 I2 min RAm Right Ascension (J2000)
33- 36 F4.1 s RAs Right Ascension (J2000)
38 A1 --- DE- Declination sign (J2000)
39- 40 I2 deg DEd Declination (J2000)
42- 43 I2 arcmin DEm Declination (J2000)
45- 46 I2 arcsec DEs Declination (J2000)
48- 53 F6.2 Mpc Dist Luminosity distance (2)
55- 64 A10 --- MType Galaxy type (3)
66 A1 --- l_F70 Limit flag on F70
67- 73 F7.3 Jy F70 Herschel/PACS 70 micron band flux density
75- 80 F6.3 Jy e_F70 ? rms uncertainty in F70
82 A1 --- l_F160 Limit flag on F160
83- 89 F7.3 Jy F160 Herschel/PACS 160 micron band flux density
91- 96 F6.3 Jy e_F160 ? Uncertainty in F160
98-104 F7.2 10-15W/m2 BAT Swift/BAT 14-195keV flux (10-12 erg/s/cm2)
106-116 A11 --- A70 Herschel/PACS 70 micron aperture size (4)
118-128 A11 --- A160 Herschel/PACS 160 micron aperture size (4)
130 I1 --- ID Program ID (5)
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Note (1): Note as follows:
b = There is at least one neighboring source inside the PACS field of view.
In this case, we removed the neighboring source and selected an
aperture that contains only the emission from the BAT source.
Note (2): To calculate the distance we assumed a universe with a Hubble constant
H0=71km/s/Mpc, ΩΛ=0.73, and ΩM=0.27, with redshift
values taken from NASA's ExtraGalactic Database (NED), except for sources
with redshift values of z<0.01 where distances are taken from The
Extragalactic Distance Database (EDD, Tully 1988 (Cat. VII/145);
Tully et al. 2009AJ....138..323T 2009AJ....138..323T).
Note (3): From Baumgartner et al. (2013, Cat. J/ApJS/207/19), as follows:
Sy = Seyfert galaxies
L = LINERs
ESO 464-G016 = AGN, unclassified Seyfert galaxy
(Veron-Cetty & Veron, 2010A&A...518A..10V 2010A&A...518A..10V, Cat. VII/258).
Note (4): Aperture size in arcsec. For elliptical apertures there are three
different values, the position angle (deg) of the aperture's major axis
measured from west to north and, the minor and major diameter in arcsec.
For point-like sources with flux densities fainter than ∼500mJy we adopted
smaller apertures as recommended by the NASA Herschel Science Center.
A "a" flag indicates high uncertainty due to cirrus contamination in the
PACS field of view.
Note (5): Program ID as follows:
1 = OT1rmushotz1
2 = OT1lho1
3 = GT1msanchez2
4 = KPGTcwilso011
5 = GT1lspinogl2
6 = KPGTesturm1
7 = OT2aalonsoh2
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History:
From electronic version of the journal
References:
Shimizu et al., Paper II, 2016MNRAS.456.3335S 2016MNRAS.456.3335S, Cat. J/MNRAS/456/3335
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 27-Sep-2016