J/ApJS/151/299 Spectra classification from ISO PHT-S database (Hodge+, 2004)
Classification of spectra from the Infrared Space Observatory PHT-S database.
Hodge T.M., Kraemer K.E., Price S.D., Walker H.J.
<Astrophys. J. Suppl. Ser., 151, 299-312 (2004)>
=2004ApJS..151..299H 2004ApJS..151..299H
ADC_Keywords: Infrared sources ; Spectra, infrared
Mission_Name: ISO
Keywords: catalogs - infrared: ISM - infrared: stars
Abstract:
We have classified over 1500 infrared spectra obtained with the PHT-S
spectrometer aboard the Infrared Space Observatory according to the
system developed for the Short Wavelength Spectrometer (SWS) spectra
by Kraemer et al. (2002ApJS..140..389K 2002ApJS..140..389K). The majority of these spectra
contribute to subclasses that are either under-represented in the SWS
spectral database or contain sources that are too faint, such as M
dwarfs, to have been observed by either the SWS or the Infrared
Astronomical Satellite Low Resolution Spectrometer. There is strong
overall agreement about the chemistry of objects observed with both
instruments. Discrepancies can usually be traced to the different
wavelength ranges and sensitivities of the instruments. Finally, a
large subset of the observations (∼250 spectra) exhibit a featureless,
red continuum that is consistent with emission from zodiacal dust and
suggest directions for further analysis of this serendipitous
measurement of the zodiacal background.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 97 1512 Source Classification
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See also:
VI/111 : ISO Observation Log (ISO Data Center, 2004)
J/ApJS/150/343 : ISOCAM CVF spectrometer 2.2-16.5µm spectra (Engelke+, 2004)
Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 30 A30 --- Name Object name (1)
32- 39 I8 --- TDT The TDT number of the observation
41- 42 I2 h RAh Hour of Right Ascension (J2000) (2)
44- 45 I2 min RAm Minute of Right Ascension (J2000) (2)
47- 51 F5.2 s RAs Second of Right Ascension (J2000) (2)
53 A1 --- DE- Sign of the Declination (J2000) (2)
54- 55 I2 deg DEd Degree of Declination (J2000) (2)
57- 58 I2 arcmin DEm Arcminute of Declination (J2000) (2)
60- 63 F4.1 arcsec DEs Arcsecond of Declination (J2000) (2)
65- 75 A11 --- Class Group and Subgroup classifications
77- 96 A20 --- Comm Additional comments (3)
97 A1 --- f_Comm [abc] Flag on Comm (4)
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Note (1): Source identification is based on the input coordinates of each
observation, rather than on the name given by the original observer.
Note (2): The coordinates are as given by the observer and represent
the nominal telescope pointing. They can differ by up to several
arcseconds with respect to the nominal coordinates of a given object.
Note (3): Additional comments mean the following:
H2 = possible H2 emission at 9.66 micron
G = extragalactic source
W, W: = wrong or suspected wrong coordinates
R = raster map (note different usage from Kraemer et al.,
2002ApJS..140..389K 2002ApJS..140..389K)
ch-r, ch-s, ch-t = chopped observation
Offset = name includes offsets from nominal position indicated by (0,0)
Propn = Name from original observer
Note (4): Flas on Comm as follows:
a = M 16: (0,0) position is 18:18:48.00 -13:47:00.0
(J2000, Simbad: simbad.u-strasbg.fr/sim-fid.pl)
b = M 17: (0,0) position is 18:20:24.83 -16:11:34.9
(J2000; Johnson et al., 1998ApJ...500..302J 1998ApJ...500..302J)
c = Cas A: (0,0) position is the Chandra point source
23:23:27.94 +58:48:42.4 (J2000; Tananbaum 1999IAUC.7246Q...1T 1999IAUC.7246Q...1T)
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 07-May-2004