MAGIC Public Spectra
100
The MAGIC project observes the VHE sky (GeV~TeV) through Cherenkov
radiation events. The project is operating since 2004 and with the support
from the Spain-VO team they provide data access through a VO-SSAP and web
services. This service re-publishes the data with homogeneized in
flux units (given here in 'erg/(s.cm2)'). Photon energy values in
are transfomred to frequencies.
2016-02-02T12:00:00Z
Moved the resource to org.gavo.dc, including some updates,
in particular now returning Spectral Data Model-compliant
files by default.
gamma-ray-astronomy
gamma-ray-sources
spectroscopy
Carlos Brandt
MAGIC
MAGIC
The MAGIC data center, http://magic.pic.es/
Research
Catalog
Gamma-ray
AllSky ICRS
previews
"\schema.data"
\inputRelativePath[:-5]
(\fullDLURL{sdl})[:-5]
"application/x-votable+xml"
\standardPreviewPath
"image/png"
@TOBS
try:
@instrument = @TELESCOP
except:
@instrument = 'MAGIC'
cols = @HDUS[1].data
@minFreq = min(cols["energy"])
@maxFreq = max(cols["energy"])
\standardPubDID
@OBJECT+'_'+@EXTNAME+'_'+@DATE_OBS
@OBJECT
@RA
@DEC
@DATE_OBS
"Gamma-ray"
LIGHT_C/@maxFreq
LIGHT_C/@minFreq
@timeext
@NAXIS2
@instrument
@AUTHOR
@REFPAPER
from gavo.utils import pyfits
from gavo.protocols import products
fitsPath = os.path.join(
base.getConfig("inputsDir"),
self.sourceToken["accref"]+".fits")
hdu = pyfits.open(fitsPath)[1]
for row in hdu.data:
yield {
"spectral": row[0],
"flux": parseWithNull(row[1], float, nullLiteral=-999.),
"flux_error": row[3]}
Magic spectrum datalink
data
"\rdId#main"
"\rdId#build_sdm_data"
yield descriptor.makeLinkFromFile(
"data/"+descriptor.accref.split("/")[-1]+".fits",
description="Original FITS")
Magic Web
Magic Public Spectra Web Interface
ssa_targname, accref, ssa_dateObs, ssa_reference,
ssa_timeExt, ssa_instrument, ssa_length
Magic SSAP
Magic Public Spectra
pointed
archival
MAXREC=1
ssa/ssap.xml
row = self.getFirstVOTableRow()
self.assertAlmostEqual(row["location_ra"], 273.3629200019562)
self.assertEqual(row["mime"], "application/x-votable+xml")
self.assertEqual(row["accref"].split("/")[3:],
['getproduct', 'magic', 'data', 'MAGIC_2006_HESS1813_SPECTRUM'])
/getproduct/magic/data/MAGIC_2006_HESS1813_SPECTRUM
rows = self.getVOTableRows()
self.assertEqual(len(rows), 7)
self.assertAlmostEqual(rows[0]["flux"], 5.253703314755575E-12)
self.assertAlmostEqual(rows[-1]["spectral"], 1.9298093898662842E27)
sdl/dlmeta
rows = self.getVOTableRows()
for r in rows:
if r["description"]=="Original FITS":
break
else:
raise AssertionError("No original FITS link")
self.assertTrue(r["access_url"].endswith(
"/magic/q/sdl/static/MAGIC_2006_HESS1813_SPECTRUM.fits"))
self.assertEqual(r["semantics"], "#this") # that's a bit questionable
web/form
self.assertHasStrings("7981", "504")
/getproduct/magic/data/MAGIC_2015_CrabNebula_SPECTRUM_1?preview=True
self.assertHasStrings("PNG", "HB*$W")