The spectra archive

In the framework of the SPACEINN project, the ground-based CoRoT complementary archive (Work Package 3.3) contains 7103 spectra of the 261 targets observed with the HARPS spectrograph, mostly as complementary observations to the photometric light curves of many of the asteroseismological targets of the CoRoT satellite.
A certain number of the archived spectra pertain to other, non-CoRoT targets: these objects were observed in order to better characterize the variability classes of the CoRoT targets.
The finished archive will have an user-friendly inferface that will allow several types of queries (by target, by variability class, by spectral type, and so on).
In the meantime, the spectra are grouped by target, and stored in tarfiles.

For any question concerning the archive please contact:
Monica Rainer: monica.rainer_AT_brera.inaf.it
Ennio Poretti: ennio.poretti_AT_brera.inaf.it

The use of this archive has to be acknowledged by the sentence:
Based on the archive "HARPS spectra of CoRoT targets", prepared in the framework of the FP7 project n 312844 SpaceInn - Exploitation of Space Data for Innovative Helio- and Asteroseismology

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The tarfile of each star contains the following files:

• *_full.fits: five columns reduced observed spectra, with wavelength (barycentric corrected, in angstrom), reduced flux, normalized flux, signal-to-noise ratio and echelle order.
• *_nor.fits: additional reduced spectra, automatically normalized and with the orders merged. They have two columns (barycentric corrected wavelength in angstrom, and normalized flux). It is important to remember that the normalization is done with an automated procedure, and as such may not always be reliable.
• *_mean.fits: the mean line profiles of each spectrum computed with the LSD software in the 4415-4805, 4915-5285, 5365-6505 angstrom regions. The files consist of two columns: Doppler velocity and normalized flux.
• OBJECT_tbl.fits: a general overview of the object time series, this table consists in:
  • the root name of the spectrum,
  • the barycentric Julian date at mid-exposure,
  • the signal-to-noise ratio of the spectrum in the 5805-5825 angstrom region,
  • the radial velocity of the star and its error,
  • the projected rotational velocity of the star and its error,
  • the q2/q1 value and its error (the ratio between the positions of the first two zeroes of the mean line profile's Fourier transform),
  • the activity index IH using only the Ca H line,
  • the activity index IK using only the Ca K line,
  • the averaged activity index IHK,
  • the Halpha emission index V/R,
  • in the case of double or multiple systems, the radial velocities, vsini and their errors will be listed, if possible, for all the components.
• OBJECT_profmed.ps: a postscript file that allows a quick look at the pulsational content of the time series. In the case of objects where a single spectrum was observed, the mean line profile of the spectrum is given instead.
• OBJECT_fit.ps: a postscript file with the observed spectrum in the 5160-5190 angstrom region and the best-fit synthetic spectrum. In the case of objects where the fit was not possible, only the observed spectrum is given.
• readme.pdf: a readme file that gives a quick overview of the files contained in the tarfiles and of the computed indices.

All the necessary information such as physical parameters (Teff, logg, and [Fe/H], computed with the SME software), pulsation and activity indices, and so on, are stored also in the fits headers.

NEW: The CoRoT photometry (N2 data) has been added for the 71 CoRoT targets observed during the ground-based spectroscopic campaign. The light curves can been downloaded from the table below as FITS files. The link shows the information on the CoRoT observing run (IR=initial run, LR=long run, SR=short run, a=anticenter, c=center, number=number of the run). For more information, see the CoRoT Archive.

ATTENTION (date: 2016/03/14): For some objects declination can be wrong in the FITS file header. AS soon as possible we will correct it.

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