Spectra of infrared standard stars

Contents

All of the spectra below are in spectral FITS format and IPAC table format. The FITS files are saved as a simple FITS image, with wavelength (in µm) in column 0, flux density (in Jy) in column 1, uncertainty in flux density (Jy) in column 2, and an order or spectral segment identifier in column 3. The IPAC table files follow the same format.

IRS standards

The spectra in the following two tables were chosen as candidate standards for the IRS on Spitzer. Unless noted otherwise, the spectra are coadded from the available data, as described by Sloan et al. (2015a). The two exceptions are HR 6348 and HD 173511, which served as primary standards for the IRS and for which template spectra are provided. These were constructed as described by Sloan and Ludovici (2012).

K giants

TargetSp. Type FITS fileIPAC table file Notes
HD 41371 K0 III hd41371 hd41371
HR 7042 K0 III hr7042 hr7042
HD 51211 K0 III hd51211 hd51211
HR 6606 K0 III hr6606 hr6606
HR 6348 K0 III HR6348_lo_s19.fits HR6348_lo_s19.tbl template spectrum
HR 2712 K0 III hr2712 hr2712
HR 1815 K1 III hr1815 hr1815
HD 59239 K1 III hd59239 hd59239
HD 156061K1 III hd156061 hd156061 debris disk
HR 6790 K1 III hr6790 hr6790
HD 39567 K1 III hd39567 hd39567
HR 7341 K1 III hr7341 hr7341
HD 52418 K2 III hd52418 hd52418
HD 130499K2 III hd130499 hd130499
HD 39577 K2 III hd39577 hd39577
HD 115136K2 III hd115136 hd115136
HD 50160 K2 III hd50160 hd50160
HD 56241 K3 III hd56241 hd56241
HD 42701 K3 III hd42701 hd42701
HD 44104 K3 III hd44104 hd44104
HD 23593 K3 III hd23593 hd23593
HD 214873K3 III hd214873 hd214873
HD 19241 K4 III hd19241 hd19241
HD 99754 K4 III hd99754 hd99754
HD 166780 K4 III hd166780 hd166780
HD 214046 K4 III hd214046 hd214046
HD 38214 K4 III hd38214 hd38214
BD+62 1644K4 III bd+62_1644 bd+62_1644
HD 53561 K5 III hd53561 hd53561
HD 15508 K5 III hd15508 hd15508
HD 173511K5 III HD173511_lo_s19.fits HD173511_lo_s19.tbl template spectrum
HD 34517 K5 III hd34517 hd34517
HD 39608 K5 III hd39608 hd39608

Gzipped tar files with all 33 K giants: FITS files (174 kbytes), IPAC table files (118 kbytes)

A dwarfs

TargetSp. Type FITS fileIPAC table file Notes
HR 1014 A3 V hr1014 hr1014
ν TauA1 V nuutau nuutau
η1 Dor A0 V eta1dor eta1dor possible debris disk
HD 46190 A0 V hd46190 hd46190 debris disk
21 Lyn A1 IV 21lyn 21lyn
26 UMa A2 V 26uma 26uma
HR 4138 A1 V hr4138 hr4138 debris disk
τ CenA2 V taucen taucen possible debris disk
ξ1 CenA0 V ksi1cen ksi1cen
HR 5467 A1 V hr5467 hr5467
HR 5949 A0 V hr5949 hr5949 debris disk
δ UMiA1 V delumi delumi
HD 163466 A2 hd163466 hd163466
HR 7018 A0 V hr7018 hr7018
λ TelB9 III lamtel lamtel
HD 165459 A2 hd165459 hd165459 debris disk
29 Vul A0 V 29vul 29vul
ε AqrA1 V epsaqr epsaqr
µ PsAA1.5 IVn muupsa muupsa
α LacA2 V alplac alplac possible debris disk

Gzipped tar files with all 20 A dwarfs: FITS files (109 kbytes), IPAC table files (72 kbytes)

M giants

M giants are far from the ideal standards, but for the sake of completeness, we've included the following M giants published by Sloan et al. (2015b). Users of these spectra, please note that the reference differs from the one for the K giants and A dwarfs.

TargetSp. Type FITS fileIPAC table file Notes
HD 13570M0 III hd13570 hd13570
HD 19554M0 III hd19554 hd19554
HD 107893M0 III hd107893 hd107893
HD 17678M1 III hd17678 hd17678
BD+47 2949M1 III bd+47_2949 bd+47_2949 also known as HIP 97959
HD 206503M1 III hd206503 hd206503
HD 122755M2 III hd122755 hd122755
HD 177643M2 III hd177643 hd177643
HD 189246M2 III hd189246 hd189246
HD 26231M3 III hd26231 hd26231
HD 127693M3 III hd127693 hd127693
HD 223306M3 III hd223306 hd223306
HD 17766M4 III hd17766 hd17766
HD 32832M4 III hd32832 hd32832
HD 46396M4 III hd46396 hd46396
HD 68422M5 III hd68422 hd68422
HD 74584M5 III hd74584 hd74584
HD 76386M5 III hd76386 hd76386
HD 8680M6 III hd8680 hd8680
BD+44 2199M6 III bd+44_2199 bd+44_2199 also known as HIP 61163

Gzipped tar files with all 20 M giants: FITS files (109 kbytes), IPAC table files (72 kbytes)

Hanscom standards

The following spectra can be used as assumed truth spectra for many of the traditional infrared standards used since the 1980s. They are generally bright and well behaved, but they include some M giants, which are not as reliable as the earlier-type stars.

Users of these spectra should cite Engelke et al. (2006, AJ, 132, 1445). They are presented here with permission of the first author.

TargetSp. Type FITS fileNotes
α LyrA0 V alpLyr.afrl.sp.fits model
α CMaA1 V alpCMa.afrl.sp.fits model
α CenG2 V + K1 V alpCen.afrl.sp.fits
α AurG3 III alpAur.afrl.sp.fits
β GemK0 III betGem.afrl.sp.fits
α BooK1.5 III alpBoo.afrl.sp.fits
α TrAK2 III alpTrA.afrl.sp.fits
α HyaK3 II- III alpHya.afrl.sp.fits
ε CarK3 III epsCar.afrl.sp.fits
β UMiK4 III betUMi.afrl.sp.fits
α TauK5 III alpTau.afrl.sp.fits
γ DraK5 III gamDra.afrl.sp.fits
β AndM0 III betAnd.afrl.sp.fits
µ UMaM0 III muuUMa.afrl.sp.fits
α CetM1.5 III alpCet.afrl.sp.fits
β PegM2.5 II-III betPeg.afrl.sp.fits variable
γ CruM3.5 III gamCru.afrl.sp.fits

gzipped tar file with all 17 Hanscom standards in FITS format (1.3 Mbytes)

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Last modified 6 March, 2025. © Gregory C. Sloan and others.