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J/ApJ/815/128     AGNs rest-frame UV and optical parameters    (Karouzos+, 2015)

Rest-frame UV single-epoch black hole mass estimates of low-luminosity AGNs at intermediate redshifts. Karouzos M., Woo J.-H., Matsuoka K., Kochanek C.S., Onken C.A., Kollmeier J.A., Park D., Nagao T., Kim S.C. <Astrophys. J., 815, 128 (2015)> =2015ApJ...815..128K (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; QSOs ; Redshifts ; Magnitudes ; Spectroscopy ; Ultraviolet Keywords: galaxies: active - quasars: emission lines - quasars: supermassive black holes Abstract: The ability to accurately derive black hole (BH) masses at progressively higher redshifts and over a wide range of continuum luminosities has become indispensable in the era of large-area extragalactic spectroscopic surveys. In this paper, we present an extension of existing comparisons between rest-frame UV and optical virial BH mass estimators to intermediate redshifts and luminosities comparable to the local Hβ reverberation-mapped active galactic nuclei (AGNs). We focus on the Mg II, C IV, and C III] broad emission lines and compare them to both Hα and Hβ. We use newly acquired near-infrared spectra from the Fiber-fed Multi-object Spectrograph instrument on the Subaru telescope for 89 broad-lined AGNs at redshifts between 0.3 and 3.5, complemented by data from the AGES survey. We employ two different prescriptions for measuring the emission line widths and compare the results. We confirm that Mg II shows a tight correlation with Hα and Hβ, with a scatter of ∼0.25 dex. The C IV and C III] estimators, while showing larger scatter, are viable virial mass estimators after accounting for a trend with the UV-to-optical luminosity ratio. We find an intrinsic scatter of ∼0.37 dex between Balmer and carbon virial estimators by combining our data set with previous high redshift measurements. This updated comparison spans a total of three decades in BH mass. We calculate a virial factor for C IV/C III] logf_C IV/C III]_=0.87 with an estimated systematic uncertainty of ∼0.4 dex and find excellent agreement between the local reverberation mapped AGN sample and our high-z sample. Description: We used AGNs from the AGN and Galaxy Evolution Survey (AGES; Kochanek et al. 2012, J/ApJS/200/8), which has a lower flux limit (mI<22.5) than other wide-area surveys such as the Sloan Digital Sky Survey (SDSS). We selected 89 broad-line AGNs at redshifts of 0.3<z<3.5 with at least one of the broad UV lines of interest (Mg II, C IV, and C III]) detected in the optical spectra. We used the FMOS (Kimura et al. 2010PASJ...62.1135K) at the Subaru 8.2 m telescope to obtain near-IR spectra (rest-frame optical) of 89 high redshift and low luminosity Type 1 AGNs. The optical spectroscopy (Kochanek et al. 2012, J/ApJS/200/8) was acquired using the Hectospec instrument (Fabricant et al. 1998SPIE.3355..285F, 2005PASP..117.1411F; Roll et al. 1998SPIE.3355..324R) at the 6.5 m MMT telescope. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 82 89 The FMOS-AGES Sample of Type 1 Quasars table4.dat 75 89 Continuum and Emission Line Luminosities in the UV and Optical table5.dat 75 82 Best-fit Profile Parameters for Rest-frame UV Emission Lines
See also: J/ApJS/168/1 : Black hole mass estimates (Kelly+, 2007) J/ApJ/680/169 : SDSS DR5 virial black hole masses (Shen+, 2008) J/ApJS/194/42 : SDSS-DR3 MgII-based black hole masses (Rafiee+, 2011) J/ApJS/200/8 : AGES: the AGN and Galaxy Evolution Survey (Kochanek+, 2012) J/A+A/587/A138 : Low-luminosity type-1 QSO sample. V. (Busch+, 2016) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [spec] 5- 9 I5 --- spec [00409/02277] FMOS ID (specNNNNN) 11- 12 I2 h RAh Hour of Right Ascension (J2000) 14- 15 I2 min RAm Minute of Right Ascension (J2000) 17- 21 F5.2 s RAs Second of Right Ascension (J2000) 23 A1 --- DE- Sign of the Declination (J2000) 24- 25 I2 deg DEd Degree of Declination (J2000) 27- 28 I2 arcmin DEm Arcminute of Declination (J2000) 30- 33 F4.1 arcsec DEs Arcsecond of Declination (J2000) 35- 38 F4.2 --- z Redshift derived from the AGES survey (Kochanek et al. 2012, J/ApJS/200/8) 40- 44 F5.2 mag Imag I-band AB magnitude 46- 50 F5.2 [10-7W] logLI Log of monochromatic luminosity calculated at the effective wavelength 7467Å 52- 57 I6 --- Code [16/782272] Selection code for the AGES survey (see Kochanek et al. 2012, J/ApJS/200/8) 59- 60 I2 --- S/N [1/35] Mean signal-to-noise ratio for the AGES spectrum 62- 66 F5.2 mag Ksmag Ks-band AB magnitude 68- 72 F5.2 [10-7W] logLKs Log of monochromatic luminosity calculated at the effective wavelength 21900Å 74 A1 --- CIV [0/1] Information about the detection of emission for the CIV broad emission line (1) 76 A1 --- CIII [0/1] Information about the detection of emission for the CIII] broad emission line (1) 78 A1 --- MgII [0/1] Information about the detection of emission for the MgII broad emission line (1) 80 A1 --- Hbeta [0/1] Information about the detection of emission for the Hβ broad emission line (1) 82 A1 --- Halpha [0/1] Information about the detection of emission for the Hα broad emission line (1)
Note (1): Information as follows: 1 = Detection; 0 = Non-detection.
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [spec] 5- 9 I5 --- spec [00409/02277] FMOS ID (specNNNNN) 11- 15 F5.2 [10-7W] logL1350 ? Log of monochromatic luminosity at 1350Å 17- 20 F4.2 [10-7W] e_logL1350 ? Uncertainty in logL1350 22- 26 F5.2 [10-7W] logL1800 ? Log of monochromatic luminosity at 1800Å 28- 31 F4.2 [10-7W] e_logL1800 ? Uncertainty in logL1800 33- 37 F5.2 [10-7W] logL3000 ? Log of monochromatic luminosity at 3000Å 39- 42 F4.2 [10-7W] e_logL3000 ? Uncertainty in logL3000 44- 48 F5.2 [10-7W] logL5100 ? Log of monochromatic luminosity at 5100Å 50- 53 F4.2 [10-7W] e_logL5100 ? Uncertainty in logL5100 55- 59 F5.2 [10-7W] logLHa ? Log of the integrated luminosity of the Hα emission line 61- 64 F4.2 [10-7W] e_logLHa ? Uncertainty in logLHa 66- 70 F5.2 [10-7W] logLHb ? Log of the integrated luminosity of the Hβ emission line 72- 75 F4.2 [10-7W] e_logLHb ? Uncertainty in logLHb
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [spec] 5- 9 I5 --- spec [00409/02277] FMOS ID (specNNNNN) 11- 14 F4.2 km/s sigCIII] ? Second moment of the CIII] emission line 16- 19 F4.2 km/s e_sigCIII] ? Uncertainty in sigCIII] 21- 24 F4.2 km/s FW(CIII]) ? FWHM of the CIII] emission line 26- 29 F4.2 km/s e_FW(CIII]) ? Uncertainty in FW(CIII]) 31 A1 --- Flag1 [ABCF] Visual quality flag for CIII] (1) 33- 36 F4.2 km/s sigCIV ? Second moment of the CIV emission line 38- 41 F4.2 km/s e_sigCIV ? Uncertainty in sigCIV 43- 46 F4.2 km/s FW(CIV) ? FWHM of the CIV emission line 48- 51 F4.2 km/s e_FW(CIV) ? Uncertainty in FW(CIV) 53 A1 --- Flag2 [ABCF] Visual quality flag for CIV (1) 55- 58 F4.2 km/s sigMgII ? Second moment of the MgII emission line 60- 63 F4.2 km/s e_sigMgII ? Uncertainty in sigMgII 65- 68 F4.2 km/s FW(MgII) ? FWHM of the MgII emission line 70- 73 F4.2 km/s e_FW(MgII) ? Uncertainty in FW(MgII) 75 A1 --- Flag3 [ABCF] Visual quality flag for MgII (1)
Note (1): Based on visual inspection, a quality flag is assigned to each fit, that ranges from A for the best fits to C for the poorest fits. These quality flags do not reflect the actual noise of the data but rather correspond to how well the best-fit model describes the emission line profile. A visual quality flag F is assigned to sources for which the fit fails completely (usually due to extremely noisy data).
History: From electronic version of the journal
(End) Prepared by Tiphaine Pouvreau [CDS] 19-Oct-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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