Bochum Galactic Disk Survey BGDS
The Bochum Galactic Disk Survey is a project to monitor the stellar content
of the Galactic disk in a 6 degree wide stripe centered on the Galactic
plane. The data has been recorded from September 2010 to September 2019
with the RoBoTT Telecsope at the Universitaetssternwarte Bochum near Cerro
Armazones in the Chilean Atacama desert. It contains measurements of more
than 2x10^7 stars. The second and final data release contains follow-up
observations from January 2017 to September 2019 in Sloan r and i and
intermittent measurements in Johnson UVB, Sloan z and the narrowbands
OIII, NB, Halpha and SII.
2017-12-02T09:16:00
20
surveys
galaxy-planes
milky-way-galaxy
variable-stars
broad-band-photometry
Hackstein, M.; Blex, J.; Haas, M.; Fein, C.; Chini, R.
Robotic Bochum Twin Telescope (RoBoTT)
Universitätssternwarte Bochum near Cerro
Armazones
2015AN....336..590H
Research
Survey
If you use GDS data, please cite
:bibcode:`2015AN....336..590H`.
Optical
dl
pub_did
//obscore#publishSIAP
1.83421e-19 6.62149e-19
55019 58751.4
3/325,336,338,344-345,448,450-451,454-455,460-461,472,583,589,591-592,594,600,602,613,615,621,623,634,650-653,658-659,662-664,672 4/1309,1311,1348,1350,1356,1358-1359,1384-1385,1388,1798-1799,1810,1824-1825,1828-1829,1831,1852-1853,1866-1867,1892,1894-1897,1900,2325-2327,2355,2361,2363,2372,2374,2449,2451,2457,2459,2481,2483,2489,2496,2498,2504,2506,2528,2530-2531,2587,2590-2591,2595,2597-2599,2616-2618,2620,2631,2642-2643,2645-2647,2660-2661,2672-2673,2676-2677,2692,2696
previews
"\schema.data"
"image/jpeg"
\splitPreviewPath{.jpeg}
"UNKNOWN"
{
'B': "Johnson B",
'B_j': "Johnson B",
'Halpha': "Astrodon Halpha",
'Ha': "Astrodon Halpha",
'SII': "Astrodon SII",
'OII': "Astrodon OIII",
'OIII': "Astrodon OIII",
'NB': "Astrodon NB",
'i': "SDSS i'",
'i_s': "SDSS i'",
'g_s': "SDSS g'",
'r': "SDSS r'",
'r_s': "SDSS r'",
'u_s': "SDSS u'",
'R': "Johnson R",
'R_j': "Johnson R",
'U': "Johnson U",
'U_j': "Johnson U",
'V_j': "Johnson V",
'I_j': "Johnson I",
'V': "Johnson V",
'z': "SDSS z'",
'z_s': "SDSS z'",
}
"FILTER"
@FILTER.strip()
parseISODT(@DATE_OBS)
str(rd.getMeta("instrument"))
"F"
"BGDS %s %s %s"%(
@TARGET.strip(), @FILTER.strip(), @DATE_OBS)
BGDS Datalink
This service lets you access cutouts
from BGDS images and retrieve scaled versions.
'bgds'
False
# Check for extra, local and magic pseudo-id coming from
# the time series (l.rd/l2.rd): MAGIC/field/band/mjd
if pubDID.startswith("MAGIC"):
# translate to the accref of the closest image
with base.getTableConn() as conn:
field, filter, dateObs = pubDID.split("/")[1:]
if filter.startswith("SDSS ") and not filter.endswith("'"):
filter = filter+"'"
dateObs = float(dateObs)
field = "GDS_"+field
res = list(conn.query("select accref from \schema.data"
" where bandpassid=%(filter)s"
" and field=%(field)s"
" and dateobs between %(dateObs)s-0.007"
" and %(dateObs)s+0.007",
locals()))
if len(res)!=1:
raise ValueError("%s matches for %s"%(
len(res), pubDID))
pubDID = getStandardPubDID(res[0][0])
return getFITSDescriptor(pubDID, accrefPrefix, cls=descClass)
bgds web
/bgds/q/sia/info
/tap
Web access to Bochum Galactic Disk Survey (BGDS)
images
You can obtain individual cutouts through
the datalinks given; for mass operations, prefer the Virtual Observatory
access modes (SIAP_ or the ivoa.obscore table in `our TAP service`_; the
BGDS collection).
.. _SIAP: https://dc.g-vo.org/bgds/q/sia/info
.. _our TAP service: https://dc.g-vo.org/tap
yield T.a(href=getDatalinkMetaLink(
rd.getById("dl"), data)
)["Datalink"]
application/x-votable+xml;content=datalink
Datalink
return "%.2f,%+.2f"%(data[0], data[1])
bgds sia
Bochum Galactic Disk Survey (BGDS) images
Pointed
pos.ra:250.54
pos.dec:-46.22
size.ra: 0.01
size.dec: 0.01
web/form
self.assertHasStrings(
# datalink link
"?ID=ivo%3A%2F%2Forg.gavo.dc%2F~%3Fbgds%2Fdata%2Fgds_big%2FGDS_0644-0035%2FHa%2Feq030000ms%2F20171123.comb_avg.0001.fits.fz",
# filter name properly mapped, title generation
"BGDS GDS_0644-0035 Astrodon Halpha 2017-11-24T05:36:25",
# filter selector generated
">SDSS i'<")
/bgds/q/dl/dlget
from gavo.utils import pyfits
from io import BytesIO
hdus = pyfits.open(BytesIO(self.data))
hdr = hdus[1].header
self.assertEqual(hdr["NAXIS1"], 451)
self.assertEqual(hdr["FILTER"], 'Halpha')
self.assertTrue(abs(hdus[1].data[0][0]-129)<1,
"BGDS cutout values?")
/bgds/q/dl/dlget
from gavo.utils import pyfits
from io import BytesIO
hdus = pyfits.open(BytesIO(self.data))
hdr = hdus[1].header
self.assertEqual(hdr["NAXIS1"], 451)
self.assertEqual(hdr["FILTER"], 'Halpha')
self.assertTrue(abs(hdus[1].data[0][0]-129)<1,
"BGDS cutout values?")
sia/siap.xml
row = self.getFirstVOTableRow()
self.assertTrue(row["exposure"] is not None, "Empty exposure time?")
previewData = utils.urlopenRemote(row["accref"]+"?preview=True").read()
self.assertTrue(b"JFIF" in previewData, "No preview?")