Information on Service 'FEROS Public Spectra Web Interface'

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Further access options are discussed below

Spectra from FEROS spectrograph at La Silla's 1.5m telescope as obtained during commissioning and guaranteed time.

For a list of all services and tables belonging to this service's resource, see Information on resource 'FEROS Public Spectra'

Service Documentation

Issues

The FITS RA and DEC header cards contain positions obtained from the telescope guidance system. These positions are frequently off by several arcminutes with respect to the actual object. Therefore, in the metadata table, the positions used for SSA location are obtained from SIMBAD whenever the target names could be resolved.

The nomenclature of objects in the FITS header is somewhat eclectic. For the SSA target name, we use translated names that can be resolved using SIMBAD.

However, there are quite a few names we could no longer make sense of; we marked these in the SSA target names with a tilda (~). For these spectra, the SSA location is constructed from the (flaky) positions in the RA, DEC header cards. Any assistance in figuring out proper designations for the objects observed is appreciated.

This service currently only serves data from the commissioning phase and from guaranteed time on the instrument. Spectra taken in visitor mode may be available from ESO in unreduced form.

If you have reduced spectra obtained with FEROS and would like to publish them, please do not hesitate to contact gavo@ari.uni-heidelberg.de.

Overview

You can access this service using:

This service is published as follows:

local means it is listed on our front page, ivo_managed means it has a record in the VO registry.

Other services provided on the underlying data include:

Input Fields

The following fields are available to provide input to the service (with some renderers, some of these fields may be unavailable):

NameTable Head DescriptionUnitUCD
mime Type MIME type of the file served N/A N/A
ssa_dateObs Date Obs. Midpoint of exposure d time.epoch
ssa_location Location ICRS location of aperture center deg pos.eq
ssa_targname Object Somewhat cleaned name of the target object as given in the file. The names should either be SIMBAD-resolvable or give a reference for the source. Some names we could not make sense of are marked with a tilda (~); any help figuring out what they are is appreciated. N/A meta.id;src

Default Output Fields

The following fields are contained in the output by default. More fields may be available for selection; these would be given below in the VOTable output fields.

NameTable Head DescriptionUnitUCD
accref Product key Access key for the data N/A meta.ref.url;meta.dataset
location_dec Dec N/A deg pos.eq.dec;meta.main
location_ra RA N/A deg pos.eq.ra;meta.main
mime Type MIME type of the file served N/A N/A
ssa_aperture Aperture Angular diameter of aperture deg instr.fov
ssa_dateObs Date Obs. Midpoint of exposure d time.epoch
ssa_specend Band end Upper value of spectral coordinate m em.wl;stat.max
ssa_specstart Band start Lower value of spectral coordinate m em.wl;stat.min
ssa_targname Object Common name of object observed. N/A meta.id;src

VOTable Output Fields

The following fields are available in VOTable output. The verbosity level is a number intended to represent the relative importance of the field on a scale of 1 to 30. The services take a VERB argument. A field is included in the output if their verbosity level is less or equal VERB*10.

NameTable Head DescriptionUnitUCD Verb. Level
accref Product key Access key for the data N/A meta.ref.url;meta.dataset 1
ssa_location Location ICRS location of aperture center deg pos.eq 5
ssa_dateObs Date Obs. Midpoint of exposure d time.epoch 5
ssa_timeExt Exp. Time Exposure duration s time.duration 5
ssa_length Length Number of points in the spectrum N/A N/A 5
accsize File size Size of the data in bytes byte VOX:Image_FileSize 11
ssa_dstitle Title Title or the dataset (usually, spectrum) N/A meta.title;meta.dataset 15
ssa_creatorDID C. DID Dataset identifier assigned by the creator N/A meta.id 15
ssa_pubDID P. DID Dataset identifier assigned by the publisher N/A N/A 15
ssa_cdate Proc. Date Processing/Creation date N/A time;meta.dataset 15
ssa_pdate Pub. Date Date last published. N/A N/A 15
ssa_bandpass Bandpass Bandpass (i.e., rough spectral location) of this dataset; use something generic like 'Optical' here. N/A instr.bandpass 15
ssa_cversion C. Version Creator assigned version for this dataset (will be incremented when this particular item is changed). N/A meta.version;meta.dataset 15
ssa_targname Object Common name of object observed. N/A meta.id;src 15
ssa_targclass Ob. cls Object class (star, QSO,...; use Simbad object classification http://simbad.u-strasbg.fr/simbad/sim-display?data=otypes if at all possible) N/A src.class 15
ssa_redshift z Redshift of target object N/A src.redshift 15
ssa_targetpos Obj. pos Equatorial (ICRS) position of the target object. N/A pos.eq;src 15
ssa_snr SNR Signal-to-noise ratio estimated for this dataset N/A stat.snr 15
ssa_aperture Aperture Angular diameter of aperture deg instr.fov 15
ssa_specmid Mid. Band Midpoint of region covered in this dataset m em.wl;instr.bandpass 15
ssa_specext Bandwidth Width of the spectrum m em.wl;instr.bandwidth 15
ssa_specstart Band start Lower value of spectral coordinate m em.wl;stat.min 15
ssa_specend Band end Upper value of spectral coordinate m em.wl;stat.max 15
mime Type MIME type of the file served N/A N/A 20
owner Owner Owner of the data N/A N/A 25
embargo Embargo ends Date the data will become/became public a N/A 25
ssa_region Coverage Rough coverage based on location and aperture. N/A N/A 30

Copyright, License, Acknowledgements

If you use this data, please reference Kaufer, A., et al: Commissioning FEROS, the new high-resolution spectrograph at La-Silla..

VOResource XML (that's something exclusively for VO nerds)