J/A+A/403/141 ISOGAL sources in intermediate bulge fields (Ojha+, 2003)
Stellar sources in the ISOGAL intermediate bulge fields.
Ojha D.K., Omont A., Schuller F., Simon G., Ganesh S., Schultheis M.
<Astron. Astrophys. 403, 141 (2003)>
=2003A&A...403..141O 2003A&A...403..141O
ADC_Keywords: Infrared sources ; Photometry, infrared
Mission_Name: ISO
Keywords: stars: AGB and post-AGB - stars: circumstellar matter -
stars: mass-loss - dust - infrared: stars - Galaxy: bulge
Abstract:
We present a study of ISOGAL sources in the "intermediate" galactic
bulge (|l|<2°, |b|∼1°-4°), observed by ISOCAM at 7 and
15µm. In combination with near-infrared (I, J, Ks) data of DENIS
survey, complemented by 2MASS data, we discuss the nature of the
ISOGAL sources, their luminosities, the interstellar extinction and
the mass-loss rates. A large fraction of the 1464 detected sources at
15µm are AGB stars above the RGB tip, a number of them show an
excess in ([7]-[15])0 and (Ks-[15])0 colours, characteristic of
mass-loss. The latter, especially (Ks-[15])0, provide estimates of
the mass-loss rates and show their distribution in the range 10-8 to
10-5M☉/yr.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 147 9 Log of ISOCAM, DENIS and 2MASS observations in
the intermediate bulge fields.
table2a.dat 212 2353 Catalogue of ISOGAL-DENIS sources from nine
intermediate bulge fields with their
2MASS (<B/2mass>) & MSX (V/107) counterparts.
table2b.dat 106 321 Sub-sample of ISOGAL-DENIS sources from
table2a.dat with Av, mass-loss rate &
luminosity values.
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See also:
B/denis : The DENIS database (Epchtein+, 1999)
B/2mass : The 2MASS database (IPAC/UMass, 2000)
II/243 : The ISOGAL Point Source Catalogue - IGPSC (Omont+ 2003)
V/107 : MSX5C Infrared Point Source Catalog (Egan+ 1999)
J/A+A/362/199 : YSOs in the l=+45 ISOGAL field (Felli+, 2000)
J/A+A/392/971 : Catalogue of bright YSO candidates in ISOGAL (Felli+, 2002)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- Field ISOGAL Field (G1)
16- 32 A17 --- OField Other designation of the field
34- 41 I8 --- ObsISOGAL1 First ISOGAL Observation number
43- 45 A3 --- Filter1 ISOGAL filter for first observation
47- 56 A10 "DD/MM/YYYY" ISOGALDate1 Date of first ISOGAL Observation
58- 62 I5 deg-2 Dens1 Source densities at 7 and 15µm
(per deg2) of first ISOGAL Observation
64- 67 F4.2 mag MagLimit1 7 and 15µm mag limits of first
ISOGAL Observation
69- 76 I8 --- ObsISOGAL2 Second ISOGAL Observation number
78- 80 A3 --- Filter2 ISOGAL filter of second
ISOGAL Observation
82- 91 A10 "DD/MM/YYYY" ISOGALDate2 Date of second ISOGAL Observation
93- 97 I5 deg-2 Dens2 Source densities at 7 and 15µm
(per deg2) of second ISOGAL observation
99-102 F4.2 mag MagLimit2 7 and 15µm mag limits of second
ISOGAL Observation
104-113 A10 "DD/MM/YYYY" DENISDate Date of DENIS IJKs observations
115 A1 --- --- [&]
117-126 A10 "DD/MM/YYYY" DENISDate2 Second date of DENIS IJKs observations
128-137 A10 "DD/MM/YYYY" 2MASSDate Date of 2MASS JHKs Obs.
139-142 F4.1 mag AV Interstellar extinction
144-147 F4.1 mag KsLimit DENIS Ks limit
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Byte-by-byte Description of file: table2a.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Seq Source number
5 A1 --- n_Seq [*] *: source in table2b.dat
6- 19 A14 --- Field ISOGAL Field Name (G1)
21- 28 A8 --- --- ISOGAL-P-]
29- 44 A16 --- ISOGAL ISOGAL designation
(from sexagesimal coordinates (J2000))
46- 54 F9.5 deg RAdeg Right ascension in decimal degrees (J2000)
56- 64 F9.5 deg DEdeg Declination in decimal degrees (J2000)
66- 74 F9.5 deg GLON [-2/2] Galactic longitude
76- 84 F9.5 deg GLAT Galactic latitude
86- 90 F5.2 arcsec Dist ISOGAL-DENIS association distance
92 I1 --- q_Dist ISOGAL-DENIS association quality
94- 98 F5.2 mag Imag ?=99.99 DENIS I magnitude (1)
100-103 F4.2 mag qImag ?=0.00 DENIS I magnitude PSF quality index
105-109 F5.2 mag Jmag ?=99.99 DENIS J magnitude (1)
111-114 F4.2 mag qJmag ?=0.00 DENIS J magnitude PSF quality index
116-120 F5.2 mag Ksmag ?=99.99 DENIS Ks magnitude (1)
122-125 F4.2 mag qKsmag ?=0.00 DENIS Ks magnitude PSF quality index
127-133 F7.2 mag Jmag2 ?=99.99 2MASS J magnitude (1) (2)
135 I1 --- q_Jmag2 ?=0 2MASS J magnitude quality index
137-143 F7.2 mag Hmag2 ?=99.99 2MASS H magnitude (1) (2)
145 I1 --- q_Hmag2 ?=0 2MASS H magnitude quality index
147-153 F7.2 mag Ksmag2 ?=99.99 2MASS Ks magnitude (1) (2)
155 I1 --- q_Ksmag2 ?=0 2MASS Ks magnitude quality index
157-161 F5.2 mag [7]mag ?=99.99 ISOGAL magnitude at 7µm (1)
163 I1 --- q_[7]mag ?=0 ISOGAL [7] magnitude quality index
165-169 F5.2 mag [15]mag ?=99.99 ISOGAL magnitude at 15µm (1)
171 I1 --- q_[15]mag ?=0 ISOGAL [15] magnitude quality index
173-177 F5.2 arcsec d[7]-[15] ?=0.00 ISOGAL [7]-[15] association distance
179 I1 --- q_d[7]-[15] ?=0 ISOGAL [7]-[15] association
quality index
181-185 F5.2 mag Amag ?=99.99 MSX A band magnitude (1)
187 I1 --- q_Amag ?=0 MSX A band magnitude quality index
189-193 F5.2 mag Cmag ?=99.99 MSX C band magnitude (1)
195 I1 --- q_Cmag ?=0 MSX C band magnitude quality index
197-201 F5.2 mag Dmag ?=99.99 MSX D band magnitude (1)
203 I1 --- q_Dmag ?=0 MSX D band magnitude quality index
205-209 F5.2 mag Emag ?=99.99 MSX E band magnitude (1)
211 I1 --- q_Emag ?=0 MSX E band magnitude quality index
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Note (1): Magnitudes assigned to values of 99.99 means that the source is
not detected in the corresponding magnitude bands.
Note (2): For 2MASS magnitudes, -100.0 mean that the magnitudes are saturated
in the corresponding bands.
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Byte-by-byte Description of file: table2b.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Seq Source number
6- 19 A14 --- Field ISOGAL Field Name (G1)
21- 28 A8 --- --- ISOGAL-P-]
29- 44 A16 --- ISOGAL ISOGAL designation (from sexagesimal
coordinates J2000)
46- 54 F9.5 deg RAdeg Right ascension in decimal degrees (J2000)
56- 64 F9.5 deg DEdeg Declination in decimal degrees (J2000)
66- 74 F9.5 deg GLON [-2/2] Galactic longitude
76- 84 F9.5 deg GLAT Galactic latitude
86- 90 F5.2 mag AV Interstellar extinction
92- 99 E8.2 solMass/yr dM/dt Mass-loss rate
101-105 F5.2 [solLum] logLum Luminosity
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Global notes:
Note (G1): The Field names are derived from the Galactic positions,
i.e., FC+00032-00217 means GLON = +0.32°, GLAT = -2.17°
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Acknowledgements: Devendra Ojha
(End) Patricia Bauer [CDS] 05-May-2003