J/ApJ/719/9 IRAC point-source catalog of Vela-D cloud (Strafella+, 2010)
The Spitzer-IRAC point-source catalog of the Vela-D cloud.
Strafella F., Elia D., Campeggio L., Giannini T., Lorenzetti D.,
Marengo M., Smith H.A., Fazio G., De Luca M., Massi F.
<Astrophys. J., 719, 9-27 (2010)>
=2010ApJ...719....9S 2010ApJ...719....9S
ADC_Keywords: Photometry, infrared ; Molecular clouds ; YSOs
Keywords: infrared: stars - ISM: clouds - ISM: individual objects - surveys -
(Vela Molecular Ridge) - stars: formation - stars: pre-main sequence
Abstract:
This paper presents the observations of Cloud D in the Vela Molecular
Ridge, obtained with the Infrared Array Camera (IRAC) camera on board
the Spitzer Space Telescope at the wavelengths λ=3.6, 4.5, 5.8,
and 8.0um. A photometric catalog of point sources, covering a field of
approximately 1.2deg2, has been extracted and complemented with
additional available observational data in the millimeter region.
Previous observations of the same region, obtained with the Spitzer
MIPS camera in the photometric bands at 24um and 70um, have also been
reconsidered to allow an estimate of the spectral slope of the sources
in a wider spectral range. A total of 170299 point sources, detected
at the 5σ sensitivity level in at least one of the IRAC bands,
have been reported in the catalog. There were 8796 sources for which
good quality photometry was obtained in all four IRAC bands. For this
sample, a preliminary characterization of the young stellar population
based on the determination of spectral slope is discussed; combining
this with diagnostics in the color-magnitude and color-color diagrams,
the relative population of young stellar objects (YSOs) in different
evolutionary classes has been estimated and a total of 637 candidate
YSOs have been selected.
Description:
The observations were carried out with the IRAC on board the Spitzer
Space Telescope. The data were obtained as part of the Spitzer/IRAC
Cycle 3 GTO (PID 30335, PI: G. Fazio). The Galactic region observed
was delimited in longitude by 264°29'≳l≳263°00' and in
latitude by 0°42'≳b≳0°50', covering about 1.2deg2.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 102 1363 VMR-D MIPS catalog
table5.dat 233 170299 VMR-D IRAC point source catalog
table9.dat 233 637 VMR-D IRAC YSO catalog
table10.dat 113 276 VMR-D MIPS YSO catalog
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See also:
J/ApJ/704/606 : Protostars identification through Spitzer (Giannini+, 2009)
J/ApJ/671/470 : MIPS survey of YSOs in Vela Molecular Ridge-D (Giannini+,
2007)
J/A+AS/104/233 : Emission-line stars in Vela Molecular Ridge (Pettersson+
1994)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- MIPS MIPS catalog number
(<[SEC2010] MIPS NNNN> in Simbad)
6- 14 F9.5 deg RAdeg Right Ascension in decimal degrees (J2000)
16- 24 F9.5 deg DEdeg Declination in decimal degrees (J2000)
26- 34 F9.5 deg GLON Galactic longitude
36- 43 F8.5 deg GLAT Galactic latitude
45- 54 E10.3 Jy F24 Spitzer/MIPS 24 micron band flux density
56- 64 E9.3 Jy e_F24 Uncertainty in F24 (1)
66- 74 E9.3 Jy F70 Spitzer/MIPS 70 micron band flux density
76- 84 E9.3 Jy e_F70 Uncertainty in F70 (1)
86- 89 F4.1 arcsec Dist Distance between centroids at 24 and 70 microns
91 A1 --- IRAC [IN] Source inside(I) / outside(N) IRAC observed
region
93 A1 --- 12CO [CAON] Association with 12CO(1-0) (G1)
95 A1 --- 13CO [CAON] Association with 13CO(2-1) (G1)
97-102 A6 --- Dust Name of 1.2mm dust core (G2)
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Note (1): When the flux reported is an upper limit, the uncertainty has
been put to zero.
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Byte-by-byte Description of file: table[59].dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- IRAC IRAC catalog number
(<[SEC2010] IRAC NNNNNN> in Simbad)
8- 17 F10.6 deg RAdeg Right Ascension in decimal degrees (J2000)
19- 28 F10.6 deg DEdeg Declination in decimal degrees (J2000)
30- 39 F10.6 deg GLON Galactic longitude
41- 49 F9.6 deg GLAT Galactic latitude
51- 62 E12.5 Jy F3.6 ? Spitzer/IRAC 3.6 micron band flux density
64- 74 E11.5 Jy e_F3.6 ?=0 Uncertainty in F3.6
76- 77 A2 --- q_F3.6 Quality flag on F3.6 (1)
79- 90 E12.5 Jy F4.5 ? Spitzer/IRAC 4.5 micron band flux density
92-102 E11.5 Jy e_F4.5 ?=0 Uncertainty in F4.5
104-105 A2 --- q_F4.5 Quality flag on F4.5 (1)
107-118 E12.5 Jy F5.8 ? Spitzer/IRAC 5.8 micron band flux density
120-130 E11.5 Jy e_F5.8 ?=0 Uncertainty in F5.8
132-133 A2 --- q_F5.8 Quality flag on F5.8 (1)
135-146 E12.5 Jy F8.0 ? Spitzer/IRAC 8.0 micron band flux density
148-158 E11.5 Jy e_F8.0 ?=0 Uncertainty in F8.0
160-161 A2 --- q_F8.0 Quality flag on F8.0 (1)
163-166 I4 --- MIPS ?=- Associated MIPS catalog number
(<[SEC2010] MIPS NNNN> in Simbad) (2)
168-171 F4.1 arcsec Dist Distance of associated MIPS source centroid
173-182 E10.3 Jy F24 ? Spitzer/MIPS 24 micron band flux density (3)
184-192 E9.3 Jy e_F24 Uncertainty in F24
194 A1 --- q_F24 [Gbu] Quality flag on F24 (4)
196-204 E9.3 Jy F70 ? Spitzer/MIPS 70 micron band flux density
206-214 E9.3 Jy e_F70 Uncertainty in F70
216 A1 --- q_F70 [Gbu] Quality flag on F70 (4)
218-222 F5.2 --- alpha ? Spectral slope; 2um<λ<20um (for
table 9 only)
224 A1 --- 12CO [CAON] Association with 12CO(1-0) (G1)
226 A1 --- 13CO [CAON] Association with 13CO(2-1) (G1)
228-233 A6 --- Dust Name of 1.2mm dust core (G2)
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Note (1): Photometry quality code as follows:
H1 = (High): "good photometry", refer to a more than 10σ detection;
"1" indicates that the source lies in the sky area covered only in
one observing epoch
H2 = (High): "good photometry", refer to a more than 10σ detection;
"2" indicates that the source lies in the sky area covered in both
observing epochs
L1 = (Low): source is revealed between 5 and 10σ and lies in the
sky area covered only in one observing epoch
L2 = (Low): source is revealed between 5 and 10σ and lies in the
sky area covered in both observing epochs
b = "bad photometry"
u = upper limit
Note (2): This is reported if its centroid is within a distance of 6" from
the IRAC source. MIPS sources detected only at 70 micron are reported
when the centroid is within 20". Notice that, due to the different
beam sizes, the association of more than one IRAC source with the same
MIPS source is allowed.
Note (3): A blank value denotes a position falling outside the MIPS mosaic.
Note (4): The quality flag is similar to that used for IRAC flux densities
but with good photometry simply flagged "G".
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Byte-by-byte Description of file: table10.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- MIPS MIPS catalog number
(<[SEC2010] MIPS NNNN> in Simbad)
6- 14 F9.5 deg RAdeg Right Ascension in decimal degrees (J2000)
16- 24 F9.5 deg DEdeg Declination in decimal degrees (J2000)
26- 34 F9.5 deg GLON Galactic longitude
36- 43 F8.5 deg GLAT Galactic latitude
45- 54 E10.3 Jy F24 Spitzer/MIPS 24 micron band flux density
56- 64 E9.3 Jy e_F24 Uncertainty in F24 (zero for upper limit) (1)
66- 74 E9.3 Jy F70 Spitzer/MIPS 70 micron band flux density
76- 84 E9.3 Jy e_F70 Uncertainty in F70 (zero for upper limit) (1)
86- 89 F4.1 arcsec Dist Distance between centroids at 24 and 70 microns
91- 95 F5.2 --- alpha Spectral slope; 2um<λ<20um
97-102 I6 --- IRAC ?=- IRAC catalog number
(<[SEC2010] IRAC NNNN> in Simbad)
104 A1 --- 12CO [CAON] Association with 12CO(1-0) (G1)
106 A1 --- 13CO [CAON] Association with 13CO(2-1) (G1)
108-113 A6 --- Dust Name of 1.2mm dust core (G2)
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Note (1): When the flux reported is an upper limit, the uncertainty has
been put to zero.
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Global notes:
Note (G1): Association flag, as mapped in Elia et al. 2007ApJ...655..316E 2007ApJ...655..316E,
as follows:
C = source lies on map pixel assigned to one or more gas clumps.
A = source is not associated to a clump, but lies inside the integrated
intensity contour corresponding to the 5K.km/s, adopted here as a
criterion for spatial association with the gas.
O = source lying inside the area observed in the given line, but not
associated with the gas according to the two previous criteria.
N = source is outside the sky area covered by observations in the
given line.
Note (G2): Taken from the lists of Massi et al. (2007A&A...466.1013M 2007A&A...466.1013M) and
reported here when the IRAC source falls within the quoted core radius.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 10-Nov-2011