J/other/RAA/15.1438 LAMOST new QSOs in M31 and M33 vicinity (Huo+, 2015)
The LAMOST survey of background quasars in the vicinity of M 31 and M 33.
III. results from the 2013 regular survey.
Huo Z.-Y., Liu X.-W., Xiang M.-S., Shi J.-R., Yuan H.-B., Huang Y.,
Zhang Y., Hou Y.-H., Wang Y.-F., Yang M.
<Res. Astron. Astrophys., 15, 1438-1448 (2015)>
=2015RAA....15.1438H 2015RAA....15.1438H (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Galaxies, nearby ; QSOs ; Redshifts
Keywords: galaxies: individual (M31, M33) - quasars: general -
quasars: emission lines
Abstract:
In this work, we report new quasars discovered in fields in the
vicinity of the Andromeda (M31) and Triangulum (M33) galaxies with the
Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST,
also called the Guo Shou Jing Telescope) during the 2013 observational
season, the second year of the regular survey. In total, 1330 new
quasars are discovered in an area of ∼133°2 around M31 and M33.
With i magnitudes ranging from 14.79 to 20.0 and redshifts from 0.08
to 4.85, the 1330 new quasars represent a significant increase in the
number of identified quasars in fields in the vicinity of M31 and M33.
Up to now, there have been a total of 1870 quasars discovered by
LAMOST in this area. The much enlarged sample of known quasars in this
area can potentially be utilized to construct a precise astrometric
reference frame for the measurement of minute proper motions of M31,
M33 and their associated substructures, which are vital for
understanding the formation and evolution of M31, M33 and the Local
Group of galaxies. Moreover, in the sample, there are a total of 45,
98 and 225 quasars with i magnitudes brighter than 17.0, 17.5 and 18.0
respectively. In the aforementioned brightness bins, 15, 35 and 84
quasars are reported here for the first time, and 6, 21 and 81 are
reported in our previous work. In addition, 0, 1 and 6 are from the
Sloan Digital Sky Survey and 24, 41 and 54 are from the NED database.
These bright quasars provide an invaluable sample to study the
kinematics and chemistry of the interstellar/intergalactic medium of
the Local Group.
Description:
The quasar candidates in fields in the vicinity of M31 and M33 have
been targeted by LAMOST since its initial commissioning in 2009; see
Paper I (Huo et al., 2010RAA....10..612H 2010RAA....10..612H) and Paper II (Huo et al.,
2013AJ....145..159H 2013AJ....145..159H, Cat. J/AJ/145/159) for the previous results on
quasars discovered with LAMOST in this area. Here we report results
based on data collected in the 2013 observational season, the second
year of the LAMOST regular survey.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 85 1330 Catalog of new quasars in fields in the vicinity
of M31 and M33 discovered by LAMOST in the
2013 observational season
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See also:
V/146 : LAMOST DR1 catalogs (Luo+, 2015)
J/AJ/145/159 : LAMOST. II. ugriz photometry of 526 new quasars (Huo+, 2013)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- Object Target name (JHHMMSS.ss+DDMMSS.s)
21- 29 F9.6 deg RAdeg Right ascension of the object (ICRS)
31- 39 F9.6 deg DEdeg Declination of the object (ICRS)
41- 44 F4.2 --- z LAMOST redshift
46- 50 A5 mag umag ? Best SDSS u band PSF magnitude
52- 56 F5.2 mag gmag Best SDSS g band PSF magnitude
58- 62 F5.2 mag rmag Best SDSS r band PSF magnitude
64- 68 F5.2 mag imag Best SDSS i band PSF magnitude
70- 74 A5 mag zmag ? Best SDSS z band PSF magnitude
76- 79 F4.2 mag Ai Galactic extinction in i band
81- 85 A5 --- Sel Selection criteria
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History:
From electronic version of the journal
References:
Huo et al., Paper I 2010RAA....10..612H 2010RAA....10..612H
Huo et al., Paper II 2013AJ....145..159H 2013AJ....145..159H, Cat. J/AJ/145/159
(End) Patricia Vannier [CDS] 25-Nov-2015