J/ApJ/775/92 MQS III: AGNs behind LMC and SMC (Kozlowski+, 2013)
The Magellanic Quasars Survey.
III. Spectroscopic confirmation of 758 active galactic nuclei behind the
Magellanic Clouds.
Kozlowski S., Onken C.A., Kochanek C.S., Udalski A., Szymanski M.K.,
Kubiak M., Pietrzynski G., Soszynski I., Wyrzykowski L., Ulaczyk K.,
Poleski R., Pietrukowicz P., Skowron J., (the OGLE Collaboration),
Meixner M., Bonanos A.Z.
<Astrophys. J., 775, 92 (2013)>
=2013ApJ...775...92K 2013ApJ...775...92K
ADC_Keywords: Surveys ; Magellanic Clouds ; QSOs ; Active gal. nuclei ;
Photometry, VRI ; Redshifts
Keywords: galaxies: active - Magellanic Clouds - quasars: general
Abstract:
The Magellanic Quasars Survey (MQS) has now increased the number of
quasars known behind the Magellanic Clouds by almost an order of
magnitude. All survey fields in the Large Magellanic Cloud (LMC) and
70% of those in the Small Magellanic Cloud (SMC) have been observed.
The targets were selected from the third phase of the Optical
Gravitational Lensing Experiment (OGLE-III) based on their optical
variability, mid-IR, and/or X-ray properties. We spectroscopically
confirmed 758 quasars (565 in the LMC and 193 in the SMC) behind the
clouds, of which 94% (527 in the LMC and 186 in the SMC) are newly
identified. The MQS quasars have long-term (12yr and growing for
OGLE), high-cadence light curves, enabling unprecedented variability
studies of quasars. The MQS quasars also provide a dense reference
grid for measuring both the internal and bulk proper motions of the
clouds, and 50 quasars are bright enough (I≲18mag) for absorption
studies of the interstellar/intergalactic medium of the clouds.
Description:
We selected targets from the OGLE-III based on their mid-IR, X-ray,
and/or photometric variability characteristics. The observations were
designed for AAOmega, a 400-fiber spectrograph mounted on the 3.9m
Anglo-Australian Telescope (AAT).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 220 565 Parameters of 565 AGNs behind the LMC
table3.dat 196 193 Parameters of 193 AGNs behind the SMC
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See also:
J/ApJ/701/508 : 5000 AGNs behind the Magellanic clouds (Kozlowski+, 2009)
J/ApJS/194/22 : MQS. I. QSOs behind SMC (Kozlowski+, 2011)
J/ApJ/746/27 : MQS. II. AGNs behind LMC (Kozlowski+, 2012)
http://ogle.astrouw.edu.pl : OGLE homepage
Byte-by-byte Description of file: table2.dat table3.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [MQS] Survey name
5- 23 A19 --- MQS Source name (JHHMMSS.ss+DDMMSS.s)
24- 26 A3 --- m_MQS [(ab) ] Multiplicity index on MQS
28- 36 F9.6 deg RAdeg Right Ascension (J2000)
38- 47 F10.6 deg DEdeg Declination (J2000)
49- 53 F5.3 --- z [0.05/3.8] Spectroscopic redshift
55- 59 F5.2 mag DM [37/48] Distance modulus µ (1)
61- 65 F5.2 mag Vmag ?=99.99 The OGLE V-band magnitude (2)
67- 71 F5.2 mag Imag The OGLE I-band magnitude
73- 76 F4.2 mag AV Extinction in V-band AV
78- 81 F4.2 mag AI Extinction in I-band AI
83- 87 F5.2 mag KV K-correction in V-band KV
89- 93 F5.2 mag KI K-correction in I-band KI
95-100 F6.2 mag VMAG ?=99.99 Absolute magnitude in V-band (2)
102-107 F6.2 mag IMAG Absolute magnitude in I-band
109-123 A15 --- OGLE OGLE-III identification ([ls]mcFFF.F.NNNNNN)
( in Simbad)
125-130 A6 --- Class Class code (as in KK09, Cat. J/ApJ/701/508) (3)
132 I1 --- MIR [0/1] Existence of mid-IR emission: 1=yes;0=no
134 I1 --- X [0/1] Existence of X-ray emission: 1=yes;0=no
136 I1 --- Var [0/1] Variable source: 1=yes, 0=no
138-139 A2 --- n_MQS New or known AGN (4)
141-142 A2 --- Qs [Q123 ] Spectrum Quality Flag: Q1=excellent,
Q2=good, Q3=low quality.
144-220 A77 --- EmLines List of emission lines; absorption lines
are written "abs()", e.g. "abs(CIV)"
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Note (1): The distance modulus is calculated from DM=5log10(Lum.dist./Mpc)+25.
Note (2): The error code for magnitudes, reflecting no measurement, is 99.99.
Note (3): The classification scheme is QSO-[AB][ab] or YSO-[AB][ab]
according to the location in color-magnitude diagrams: A and B for
IRAC colors/magnitudes, a and b with the I color from OGLE-III.
Note (4): The note is;
N = a new AGN
I = an AGN discovered and reported in Paper I (Cat. J/ApJS/194/22)
II = an AGN discovered and reported in Paper II (Cat. J/ApJ/746/27)
K = an already known AGN (see: Geha et al., 2003AJ....125....1G 2003AJ....125....1G,
Dobrzycki et al., 2002ApJ...569L..15D 2002ApJ...569L..15D and 2005A&A...442..495D 2005A&A...442..495D,
Schmidtke et al., 1994PASP..106..843S 1994PASP..106..843S,
Crampton et al., 1997, J/AJ/114/2353)
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Acknowledgements:
Szymon Kozlowski, simkoz(at)astrouw.edu.pl
References:
Kozlowski & Kochanek (KK09), 2009ApJ...701..508K 2009ApJ...701..508K Cat. J/ApJ/701/508
Kozlowski et al., Paper I. 2011ApJS..194...22K 2011ApJS..194...22K Cat. J/ApJS/194/22
Kozlowski et al., Paper II. 2012ApJ...746...27K 2012ApJ...746...27K Cat. J/ApJ/746/27
(End) Patricia Vannier [CDS] 12-Nov-2014