J/AJ/137/3761 Ultraviolet quasi-stellar objects (Bianchi+, 2009)
Ultraviolet quasi-stellar objects.
Bianchi L., Hutchings J.B., Efremova B., Herald J.E., Bressan A., Martin C.
<Astron. J., 137, 3761-3777 (2009)>
=2009AJ....137.3761B 2009AJ....137.3761B
ADC_Keywords: QSOs ; Ultraviolet ; Photometry, SDSS
Keywords: quasars: absorption lines - quasars: emission lines -
quasars: general - ultraviolet: galaxies
Abstract:
We present a sample of spectroscopically confirmed quasi-stellar
objects (QSOs) with FUV-NUV color (as measured by Galaxy Evolution
Explorer (GALEX) photometry, FUV band: 1344-1786Å, NUV band:
1771-2831Å) bluer than canonical QSO templates and than the
majority of known QSOs. We analyze their FUV to NIR colors,
luminosities, and optical spectra. The sample includes a group of 150
objects at low redshift (z<0.5), and a group of 21 objects with
redshift 1.7<z<2.6.
Description:
The sample was extracted from the catalog of matched UV/optical
sources of Bianchi (2008, Future Directions in Ultraviolet
Spectroscopy, ed. Steenberg Van et al., in press), obtained by
matching the UV sources in the GALEX third data release (GR3,
http://galex.stsci.edu) to the Sloan Digital Sky Survey (SDSS) sixth
data release (DR6).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 155 172 The UV-blue QSO sample
table2.dat 147 23 Objects with repeated GALEX observations
discrepant by >2σ error
table3.dat 46 150 Hα measurements (restframe) of the
low-redshift QSOs
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See also:
II/282 : SDSS Photometric Catalog, Release 6 (Adelman-McCarthy+, 2007)
II/294 : SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
J/AJ/130/825 : GALEX ultraviolet variability catalog (Welsh+, 2005)
J/AJ/133/1780 : GALEX/SDSS quasar catalog (Trammell+, 2007)
J/AJ/136/259 : Second GALEX UV variability catalog (GUVV-2) (Wheatley+, 2008)
J/ApJ/664/53 : UV photometry of GALEX QSO candidates (Atlee+, 2007)
J/ApJ/690/1181 : UV-bright quasars (Syphers+, 2009)
http://www.sdss.org : SDSS Home Page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1 A1 --- f_z [<>] Flag on z (G1)
3- 8 A6 --- --- [GALEX_]
9- 27 A19 --- GALEX GALEX source name (JHHMMSS.ss+DDMMSS.s)
29- 39 F11.7 deg RAdeg Right Ascension in decimal degrees (J2000)
41- 51 F11.7 deg DEdeg Declination in decimal degrees (J2000)
53- 57 F5.2 mag FUVmag GALEX FUV AB magnitude
59- 63 F5.2 mag e_FUVmag Error in FUVmag
65- 69 F5.2 mag NUVmag GALEX NUV AB magnitude
71- 75 F5.2 mag e_NUVmag Error in NUVmag
77- 81 F5.2 mag umag SDSS u band AB magnitude
83- 87 F5.2 mag e_umag Error in umag
89- 93 F5.2 mag gmag SDSS g band AB magnitude
95- 99 F5.2 mag e_gmag Error in gmag
101-105 F5.2 mag rmag SDSS r band AB magnitude
107-111 F5.2 mag e_rmag Error in rmag
113-117 F5.2 mag imag SDSS i band AB magnitude
119-123 F5.2 mag e_imag Error in imag
125-129 F5.2 mag zmag SDSS z band AB magnitude
131-135 F5.2 mag e_zmag Error in zmag
137-140 F4.2 --- z Redshift
142-145 F4.2 mag E(B-V) Reddening
147-155 A9 --- com Source structure: "pointlike" or "extended"
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1 A1 --- f_z [<>] Flag on z (G1)
3- 21 A19 --- GALEX GALEX source name (JHHMMSS.ss+DDMMSS.s)
23- 27 F5.2 mag FUVmag GALEX FUV magnitude (AB)
29- 32 F4.2 mag e_FUVmag FUV magnitude (AB)
34- 38 F5.2 mag NUVmag GALEX NUV magnitude (AB)
40- 43 F4.2 mag e_NUVmag NUV magnitude (AB)
45- 54 A10 "DD/MM/YYYY" Date Observation date
56- 59 I4 s dt.1 Exposure time (FUV)
60 A1 --- --- [/]
61- 64 I4 s dt.2 Exposure time (NUV)
66- 84 A19 --- GALEX2 Matched GALEX ID (JHHMMSS.ss+DDMMSS.s)
86- 89 F4.2 arcsec Dist Distance between GALEX and GALEX2
91- 95 F5.2 mag FUV2 ?=- GALEX FUV magnitude (AB) of GALEX2
97-100 F4.2 mag e_FUV2 ? FUV magnitude (AB) of matched GALEX2
102-106 F5.2 mag NUV2 ?=- GALEX NUV magnitude (AB) of GALEX2
108-111 F4.2 mag e_NUV2 ? NUV magnitude (AB) of matched GALEX2
113-122 A10 "DD/MM/YYYY" Date2 Observation date of matched GALEX2
124-128 I5 s dt2.1 Exposure time of matched GALEX2 (FUV)
129 A1 --- --- [/]
130-134 I5 s dt2.2 Exposure time of matched GALEX2 (NUV)
136-138 A3 -- Survey Survey (MIS or GII)
140-147 A8 --- Com Comments (1)
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Note (1): Comments as follows:
! = denotes magnitude discrepancy (NUV or FUV) greater than 3σ,
E = denotes that the EDGE artifact flag is set, for matched measurement
e = denotes that the EDGE artifact flag is set, for original source
P = denotes SExtractor flag 1 set (object has neighbors),
for matched measurement
p = denotes SExtractor flag 1 set (object has neighbors),
for original source
B = denotes SExtractor flag 2 set (object was originally blended with
another one), for matched measurement
b = denotes SExtractor flag 2 set (object was originally blended with
another one), for original source
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- --- [GALEX]
7- 25 A19 --- GALEX GALEX source (JHHMMSS.ss+DDMMSS.s)
27- 32 F6.1 0.1nm HaW Hα line width in Angstroms
34- 39 F6.1 0.1nm W(Ha) Hα equivalent width in Angstroms
41- 46 F6.2 10-19W/m2/nm logFHa Halpha flux (in 10-17erg/s/cm2/Å)
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Global notes:
Note (G1): Indicating if QSO redshift greater or less than 1.
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History:
* 10-Sep-2011: From electronic version of the journal
* 16-Nov-2011: in table2, corrected sign of GALEX name
(original J234019.81+005907.9 corrected into J234019.81-005907.9)
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 10-Sep-2011