J/ApJ/697/182 Dust emission from unobscured AGN (Thompson+, 2009)
Dust emission from unobscured active galactic nuclei.
Thompson G.D., Levenson N.A., Uddin S.A., Sirocky M.M.
<Astrophys. J., 697, 182-193 (2009)>
=2009ApJ...697..182T 2009ApJ...697..182T
ADC_Keywords: Active gal. nuclei ; QSOs ; Spectra, infrared
Keywords: dust, extinction - galaxies: active - galaxies: nuclei -
infrared: galaxies - radiative transfer
Abstract:
We use mid-infrared (MIR) spectroscopy of unobscured active galactic
nuclei (AGNs) to reveal their native dusty environments. We
concentrate on Seyfert 1 galaxies, observing a sample of 31 with the
Infrared Spectrograph aboard the Spitzer Space Telescope, and compare
them with 21 higher luminosity quasar counterparts.
Description:
We select Seyfert 1 galaxies from the Rush et al. (1993, Cat. VII/157)
12 um survey, using 31 with archival low-resolution spectra from the
Spitzer Space Telescope Infrared Spectrograph (IRS) in this study.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 80 52 Observations and galaxy data
table2.dat 18 416 Average type 1 AGN spectra
table3.dat 75 52 Spectral measurements
--------------------------------------------------------------------------------
See also:
VII/157 : The Extended 12um galaxy sample (Rush+ 1993)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- Type Seyferts 1 (Sy1) or quasar (QSO)
5- 20 A16 --- Name Galaxy name
22- 23 I2 h RAh Right ascension (J2000)
25- 26 I2 min RAm Right ascension (J2000)
28- 31 F4.1 s RAs Right ascension (J2000)
33 A1 --- DE- Declination sign (J2000)
34- 35 I2 deg DEd Declination (J2000)
37- 38 I2 arcmin DEm Declination (J2000)
40- 41 I2 arcsec DEs Declination (J2000)
43- 47 F5.3 --- z Redshift
49- 52 I4 pc/arcsec Scale Scale
54- 61 I8 --- AOR Astronomical Observation Request number
63- 72 A10 "YYYY/MM/DD" Obs.Date Observation date
74- 76 I3 s TS On-source exposure time in Short Low
78- 80 I3 s TL On-source exposure time in Long Low
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 F6.3 um lambda Rest wavelength (1)
8- 12 F5.3 --- S1Flux Average Seyfert 1 scaled flux density (2)
14- 18 F5.3 --- QFlux ? Average quasar scaled flux density (2)
--------------------------------------------------------------------------------
Note (1): The wavelength scale is non-uniform and based on the original
resolution, which decreases toward longer wavelengths.
Note (2): Normalized at 14 microns.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- Type Seyferts 1 (Sy1) or quasar (QSO)
5- 20 A16 --- Name Galaxy name
22- 26 F5.2 --- S10 Silicate strength at 10um
28- 31 F4.1 um lam10 Peak wavelength at 10um
33- 37 F5.2 --- S18 Silicate strength at 18um
39- 42 F4.1 um lam18 Peak wavelength at 18um
44- 50 E7.2 mW/m2 [NeII] ?=- [NeII] integrated flux at 12.8um
52- 58 E7.2 mW/m2 F6.2 ?=- 6.2um PAH integrated flux
60- 64 F5.3 Jy F5 Integrated flux density at 5um
66- 69 F4.2 Jy F14 Integrated flux density at 14um
71- 75 F5.2 Jy F30 Integrated flux density at 30um
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 30-Nov-2011