!!! NOTE !!!


has replaced CoolCAT. The image processing is superior to that incorporated in the earlier catalog, and the precision of the wavelength scales was improved significantly. See Ayres (2010) for details.


HST STIS Echelle Spectral Catalog of Late-Type Stars
Thomas Ayres, University of Colorado (CASA)


This page is a portal into a catalog of HST STIS echelle spectra of normal late-type (cool) stars. The catalog includes those objects in the HST archive as of March 2003 with publicly available STIS data taken in one or more of the echelle modes. Unusual objects like cataclysmic variables, symbiotics, and eclipsing binaries of the Zeta Aurigae class were excluded. For each echelle observation, the individual echelle orders from the standard pipeline processing were spliced together to form a continuous 1-D spectrum. Each spectrum was graded on a scale of A (=excellent) to E (=probably useless for analysis) by considering the cumulative distribution of signal-to-noise over the wavelength bins. If more than one observation was available in a specific echelle mode setting, these were coadded using cross-correlation to align the exposures to a common wavelength scale. If two or more different mode settings were available, the segments were concatenated to form a broad-band spectral tracing. The flux scales of the segments were adjusted, if necessary, to match calibrated IUE NEWSIPS low- and high-resolution spectral energy distributions (as available). A description of the procedures and rationales can be found in CoolCAT Summary (pdf file).

The Table below is arranged by luminosity class, with supergiants at the top, and within each class by descending spectral type. Clicking on p in the second column will return a preview of the spectrum over the range 1150-3050 Angstroms. The spectrum is the thin black line, the green curve indicates the 1 sigma photometric error, and red x's flag bad pixels. Note the logarithmic flux scale. The final four columns of the Table summarize the wavelength coverage and quality of the available spectral material in four representative ultraviolet bands: F[UV]1= 1200-1700 Angstroms, N[UV]1= 1700-2500 Angstroms, N2= 2500-2800 Angstroms, N3= 2800-3100 Angstroms. The grading is on the A[best]-E[worst] scale mentioned previously, and an x indicates no coverage available in that band. Clicking on the grade will return a preview of that specific wavelength interval.

The Mnemonic is a link to a second table for each object, listing the individual, and combined, processed spectra, and providing links to previews of each spectrum, including an assessment of the image quality. If an IUE calibration was performed for that object, a preview will be linked. Downloadable versions of the processed spectra are simple flat ASCII .txt tables with FITS-like headers summarizing identifying information. A description of the header keywords can be found in Header Keywords.

Contents of the Catalog

MnemonicHD No.VB-VTypeParallaxRadVelF1N1N2N3
bet_aqr p 204867+2.91+0.83G0Ib5.33 [.94]+6.5 [.9]CB*AA
bet_cam p 31910+4.03+0.87G1Ib-II3.27 [.74]-1.7 [.9]CCBB
eps_gem p 48329+3.02+1.43G8Ib3.61 [.91]+9.9 [.9]D*C*CC
alp_tra p 150798+1.92+1.44K2II-III7.85 [.63]-3.3 [.9]CCBC
31_com p 111812+4.93+0.63G0IIIp10.62 [.90]-1.4 [2]Cxxx
35_cnc p 72779+6.58+0.66G0III5.57 [.91]+36 [5]DCBB
hr_9024 p 223460+5.90+0.79G1IIIe7.41 [.70]+.7 [.9]CCBB
24_uma p 82210+4.57+0.75G4III-IV30.89 [.55]-27.2 [.9]CCBB
alp_aur p 34029+0.08+0.80G5IIIe+77.29 [.89]+30.2 [.9*]Axxx
mu_vel p 93497+2.72+0.91G5III+28.18 [.49]+6.2 [.9]Bxxx
iot_cap p 203387+4.30+0.88G8III15.13 [.80]+11.5 [.9]CBBB
bet_cet p 4128+2.04+1.02K0III34.04 [.82]+13.0 [.9]Bxxx
alp_boo p 124897-0.04+1.23K1.5III88.85 [.74]-5.2 [.9]B*C*AA
alp_tau p 29139+0.85+1.54K5III50.09 [.95]+54.3 [.9]C*xxx
ups_peg p 220657+4.40+0.61F8IV18.83 [.72]-11.1 [2]CBAB
hr_1099 p 22468+5.91+0.85(K1IV+dG)34.52 [.87]-23 [5*]Bxxx
hd_28568 p 28568+6.51+0.41F224.28 [.79]+43.6 [2]DxxC
hd_140283 p 140283+7.24+0.45sdF317.44 [.97]-171.4 [.9]EBAA
alp_cmi p 61421+0.34+0.40F5IV-V285.93 [.88]-3.2 [.9]xBAA
hr_4657 p 106516+6.11+0.46F5V44.34 [1.0]+8.2 [.9]ExAx
zet_dor p 33262+4.72+0.47F7V85.83 [.46]-2.0 [.9]CBAB
hd_28033 p 28033+7.35+0.51F8V21.54 [.97]+42 [5]ExBA
chi_her p 142373+4.62+0.56F8Ve63.08 [.54]-55.4 [.9]Dxxx
v993_tau p 28205+7.41+0.51G021.83 [1.0]+38.5 [2]ExxD
v376_peg p 209458+7.65+0.53G0V21.24 [1.0]-14.8 [~]Exxx
chi1_ori p 39587+4.41+0.59G0V115.43 [1.1]-13.5 [.9]CBAB
hd_184499 p 184499+6.61+0.59G0V31.29 [.62]-163.3 [2]EBBB
alp1_cen p 128620-0.01+0.71G2V742.24 [1.4]-24.6 [.9*]CBBA
61_vir p 115617+4.74+0.71G5V117.30 [.71]-8.5 [.9]ExB*x
kap_cet p 20630+4.83+0.68G5Vvar109.18 [.78]+19.9 [.9]CBBB
hr_2225 p 43162+6.37+0.67G5V59.90 [.75]+22.0 [1.0]Dxxx
tau_cet p 10700+3.50+0.72G8V274.18 [.80]-16.4 [.9]Cxxx
xi1_boo p 131156+4.55+0.76G8V149.26 [.76]+3.0 [.9]DxAx
hr_8 p 166+6.13+0.75K0V72.98 [.75]-8.2 [2]Dxxx
70_oph p 165341+4.03+0.86K0V196.62 [1.4]-7.9 [.5*]CCBB
36_oph p 155886+5.29+0.86K0V183.00 [9.0]-0.6 [.9]DxCC
del_eri p 23249+3.51+0.92K0IV110.58 [.88]-6.1 [.9]D*xxx
eps_eri p 22049+3.73+0.88K2V310.74 [.85]+15.5 [.9]C*CCx
au_mic p 197481+8.61+1.44M0100.59 [1.4]+1.2 [2]Cxxx
ev_lac p +10.09+1.36M3.5198.07 [2.1]-1.5 [2]Dxxx
ad_leo p +9.43+1.54M3.5V213 [4]+10.8 [2]Bxxx
prox_cen p +11.05+1.97M5.5Ve772.33 [2.4][~]Cxxx
T Tauri Stars
dg_tau p +11: [~] GV:e[~][~]ExDD
ru_lup p 142560+11.40+0.30G5V:e4.34 [3.6]-6.4 [2]Dxxx
t_tau p 284419+9.60 [~] G5V:e5.66 [1.6]+24.6 [2]DxCC
dr_tau p +13.60+1.36K4V:e[~][~]EECC
ds_tau p +12.90+1.10K4V:e[~]+13.0 [~]DECC
df_tau p 283654+11.00+2.00K526 [6][~]EDDD
v819_tau p +13.24+1.57K7V[~][~]EEEE
v836_tau p +13.13+1.53K7V[~][~]Exxx
tw_hya p +11.10+0.70K8Ve17.72 [2.2][~]CxCC
cy_tau p +13.50+1.28M2V:e[~]-48 [~]EEEE

Notes. Stellar data from SIMBAD. V and B-V in magnitudes, Parallax in milliarcseconds, RadVel is radial velocity in km/s (v denotes variable owing to binary orbit). Bracketed values are errors; tildes indicate missing values. An asterisk on the grade indicates that the quality is mixed between that grade and the next one higher.

Acknowledgments. Based on observations made with the NASA/ESA Hubble Space Telescope, obtained from the Data Archive at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. Support for CoolCAT was provided by NASA through grant HST-AR-09550.01-A from STScI. The SIMBAD database is maintained by CDS, Strasbourg, France. Top-level web pages draw heavily from the Library of IUE NEWSIPS SWP Echelle Spectra for White Dwarfs.