SPECTRUM STANDARDS

The following is a list of the spectrum standard blue plots available in this directory.
More stars may be added to the list as observations are reduced.
The header on a standard star plot will give the star name (or names), spectral type, and usually the catalog in which it appears as a standard, and date of observation.
Photometric data for most of the O and earlier B stars show that they are significantly reddened. Only for those cases where the flux vs wavelength curve is noticeably flattened is this noted.

A Weitenbeck

 Catalog abbreviations:
 AMMT   Abt Meinel Morgan Tapscott An Atlas of Low Dispersion Grating Stellar Spectra
 C+J        Cowley & Jaschek AJ 74, 375 1969
 GGv69   Gray & Garrison ApJSup 69, 301
 GGv70   Gray & Garrison ApJSup 70, 626
 KM        Keenan & McNeil An Atlas of Spectra of the Cooler Stars
 KM2       Keenan & McNeil ApJSup 71, 245 1989
 KY         Keenan & Yorka BICDS 29, 25 1985
 L            Lesh ApJSupp 17, 371
 MAT      Morgan Abt Tapscott Revised MK Spectral Atlas for Stars Earlier than the Sun
 W          Walborn ApJSupp 23, 257
 Y           Yamashita, Nariai, Norimoto An Atlas of Representative Stellar Spectra


SPECTRUM STANDARDS

Xi Per O7.5III    O7.5III((f))
HD193322 O9V
AE Aur O9.5V
HD189957 O9.5III
Alpha Cam O9.5Ia

Epsilon Ori B0Ia
Delta Sco B0.5IV    Emission at Hbeta, higher lines may be partially filled in.
Kappa Aql B0.5III
Kappa Ori B0.5Ia
Kappa Aql B0.5III
Alpha Vir B1IV
HR6353 B1.5V
Chi2 Ori B2Ia
103 Tau B2V
29 Per B3V    The spike near Hepsilon is a hot pixel; also ignore the spikes near 4750 and 4250 Angstroms.
Eta Aur B3V
55 Cyg B3Ia
90 Leo B4V
Kappa Hya B5V
Nu And B5V
Delta Per= HD22928 B5III    The spike by H epsilon is a hot pixel, not an emission line
19 Tau B6V
Beta Sex B6V
HR1029 B7V
Beta Tau B7III
Eta Tau B7III
Iota Oph B8V
Beta Ori B8Ia
Sigma Leo B9V

Alpha Lyr A0Va
109 Vir A0V
Alpha Dra A0III
Eta Leo A0Ib
HD21389 A0Ia   This star is reddened, so the spectrum is flattened.
Beta UMa A1V
Theta Vir A1V
Theta Leo A2V
Delta UMa A3V
80 UMa A5V
Alpha Oph A5III
Omicron Sco A5II    This star is reddened, so the spectrum is flattened.
Iota UMa A7V
21 LMi A7V
Gamma Her A9III

Gamma Vir F0V
37 UMa F1V
78 UMa F2V
Sigma Boo F2V
Beta Cas F2III-IV
20 CVn F3III
45 Boo F5V
Beta Vir F8V

Beta Com G0V
Phi Vir G0IV
31 Com G0III
the Sun G2V; the Sun G2V The spectrum of the Sun as a standard is normally observed as a spectrum of an airless body, like the Moon or Ganymede; there are no usable HPOL observations of either of these; these spectra are of Mars and Jupiter.
The colors of these bodies will change the relative flux level in broad wavelength bands compared to the true Solar spectrum; notice the shape of the curves differ from each other about 4000-4800Angstroms.
Omi UMa G5IIIa
HD71115 G7II-III
Epsilon Vir G8III

Epsilon Cor Bor K2III This spectrum is noisier than the others
6 Dra K3III
Alpha Tau K5III

Alpha Her AB M5Ib-II   Alpha Her is a binary; the spectral type refers to the primary; the secondary is a G giant a few arc seconds away which also lies in the HPOL aperture.
Component B is about 2 mag fainter than A; spectral features from it may be noticeable at the shortest wavelengths