The Northern Sky Narrowband Survey maps the entire northern
hemisphere down to a declination of -16° in the light of the emission
lines H-alpha (656.3 nm), [OIII] (500.7 nm) and [SII] (671.7 nm and
673.0 nm). The usable angular resolution (FWHM of a point source) is
about 10 arcseconds.
There is also a continuum survey from the same instrument. HIPSes from
that, and compositions with the narrow line surveys, are available
from ivo://org.gavo.dc/nsns/cont.
The Northern Sky Narrowband Survey maps the entire northern
hemisphere down to a declination of -16° at an angular resolution of
about 10 arcsec.
Estimated variance (square noise) of SII (HiPS
simg.de/P/NSNS/DR0_2/sii) normalized to 30" pixels. Use these data to
assess the accuracy of the continuum-subtracted SII, which is mainly
determined by photon noise, whether from the signal of interest or
from contamination.
The Northern Sky Narrowband Survey maps the entire northern
hemisphere down to a declination of -16° at an angular resolution of
about 10 arcsec.
SII at 671.7 nm and 673.0 nm (without continuum) as compressed 8-bit
HIPS for easy visualization. See http://www.simg.de/nebulae3/dr0_2 for
other data sets.
The Northern Sky Narrowband Survey maps the entire northern
hemisphere down to a declination of -16° at an angular resolution of
about 10 arcsec.
H-alpha (without continuum, mapped to red), blue continuum (mapped to
green) and red continuum (mapped to blue) as compressed 8-bit color
HIPS for easy visualization. Stars are partially subtracted to make
the faint reflection nebulae visible. See
http://www.simg.de/nebulae3/dr0_2 for other data sets.
The Northern Sky Narrowband Survey maps the entire northern
hemisphere down to a declination of -16° at an angular resolution of
about 10 arcsec.
Estimated variance (square noise) of OIII (HiPS
simg.de/P/NSNS/DR0_2/oiii) normalized to 30" pixels. Use these data to
assess the accuracy of the continuum-subtracted OIII, which is mainly
determined by photon noise, whether from the signal of interest or
from contamination.
The Northern Sky Narrowband Survey maps the entire northern
hemisphere down to a declination of -16° at an angular resolution of
about 10 arcsec.
SII at 671.7 nm and 673.0 nm with linear intensity and full dynamic
range in Rayleighs. See http://www.simg.de/nebulae3/dr0_2 other data
sets.
The Northern Sky Narrowband Survey maps the entire northern
hemisphere down to a declination of -16° at an angular resolution of
about 10 arcsec.
OIII at 500.7 nm (without continuum) as compressed 8-bit HIPS for easy
visualization. See http://www.simg.de/nebulae3/dr0_2 for other data
sets.
The Northern Sky Narrowband Survey maps the entire northern
hemisphere down to a declination of -16° at an angular resolution of
about 10 arcsec.
H-alpha (without continuum), background-corrected and
intensity-calibrated to Rayleighs using WHAM (Wisconsin H-Alpha
Mapper) data. This dataset only contains FITS images with linear
intensity and full dynamic range. See
http://www.simg.de/nebulae3/dr0_2 for other HIPSs.
The Northern Sky Narrowband Survey maps the entire northern
hemisphere down to a declination of -16° at an angular resolution of
about 10 arcsec.
H-alpha (without continuum) as compressed 8-bit HIPS for easy
visualization. See http://www.simg.de/nebulae3/dr0_2 for other data
sets.
The Northern Sky Narrowband Survey maps the entire northern
hemisphere down to a declination of -16° at an angular resolution of
about 10 arcsec.
[OIII] (mapped to red), H-alpha (mapped to green), and [SII] (mapped
to blue) without continuum (except for the brightest stars) as
compressed 8-bit color HIPS for easy visualization. See
http://www.simg.de/nebulae3/dr0_2 for other data sets.
The Northern Sky Narrowband Survey maps the entire northern
hemisphere down to a declination of -16° at an angular resolution of
about 10 arcsec.
Estimated variance (square noise) of H-alpha (HiPS
simg.de/P/NSNS/DR0_2/halpha) normalized to 30" pixels. Use these data
to assess the accuracy of the continuum-subtracted H-alpha, which is
mainly determined by photon noise, whether from the signal of interest
or from contamination.
The Northern Sky Narrowband Survey maps the entire northern
hemisphere down to a declination of -16° at an angular resolution of
about 10 arcsec.
OIII at 500.7 nm with linear intensity and full dynamic range in
Rayleighs. See http://www.simg.de/nebulae3/dr0_2 other data sets.
