TY - JOUR
T1 - First imaging results from Apertif, a phased-array feed for WSRT
AU - Adams, Elizabeth A.
AU - Adebahr, Björn
AU - de Blok, Willem J. G.
AU - Hess, Kelley M.
AU - Hut, Boudewijn
AU - Lucero, Danielle M.
AU - Maccagni, Filippo
AU - Morganti, Raffaella
AU - Oosterloo, Tom
AU - Staveley-Smith, Lister
AU - van der Hulst, Thijs
AU - Verheijen, Marc
AU - Verstappen, Joris
PY - 2017/1/1
Y1 - 2017/1/1
N2 - Apertif is a phased-array feed for the Westerbork Synthesis Radio
Telescope (WSRT), increasing the field of view of the telescope by a
factor of twenty-five. In 2017, three legacy surveys will commence: a
shallow imaging survey, a medium-deep imaging survey, and a pulsars and
fast transients survey. The medium-deep imaging survey will include
coverage of the northern Herschel Atlas field, the CVn region, HetDex,
and the Perseus-Pisces supercluster. The shallow imaging survey
increases overlap with HetDex, has expanded coverage of the
Perseus-Pisces supercluster, and includes part of the Zone of Avoidance.
Both imaging surveys are coordinating with MaNGA and will have WEAVE
follow-up. The imaging surveys will be done in full polarization over
the frequency range 1130-1430 MHz, which corresponds to redshifts of
z=0-0.256 for neutral hydrogen (HI). The spectral resolution is 12.2
kHz, or an HI velocity resolution of 2.6 km/s at z=0 and 3.2 km/s at
z=0.256. The full resolution images will have a beam size of
15"x15"/sin(declination), and tapered data products (i.e., 30"
resolution images) will also be available. The shallow survey will cover
~3500 square degrees with a four-sigma HI imaging sensitivity of
2.5x10^20 atoms cm^-2 (20 km/s linewidth) at the highest resolution and
a continuum sensitivity of 15 uJy/beam (11 uJy/beam for polarization
data). The current plan calls for the medium deep survey to cover 450
square degrees and provide an HI imaging sensitivity of 1.0x10^20 atoms
cm^-2 at the highest resolution and a continuum sensitivity of 6
uJy/beam, close to the confusion limit (4 uJy/beam for polarization
data, not confusion limited). Up-to-date information on Apertif and the
planned surveys can be found at: http://www.apertif.nl.Commissioning of
the Apertif instrument is currently underway. Here we present first
results from the image commissioning, including the detection of HI
absorption plus continuum and HI imaging. These results highlight the
data quality that will be achieved for the surveys.
AB - Apertif is a phased-array feed for the Westerbork Synthesis Radio
Telescope (WSRT), increasing the field of view of the telescope by a
factor of twenty-five. In 2017, three legacy surveys will commence: a
shallow imaging survey, a medium-deep imaging survey, and a pulsars and
fast transients survey. The medium-deep imaging survey will include
coverage of the northern Herschel Atlas field, the CVn region, HetDex,
and the Perseus-Pisces supercluster. The shallow imaging survey
increases overlap with HetDex, has expanded coverage of the
Perseus-Pisces supercluster, and includes part of the Zone of Avoidance.
Both imaging surveys are coordinating with MaNGA and will have WEAVE
follow-up. The imaging surveys will be done in full polarization over
the frequency range 1130-1430 MHz, which corresponds to redshifts of
z=0-0.256 for neutral hydrogen (HI). The spectral resolution is 12.2
kHz, or an HI velocity resolution of 2.6 km/s at z=0 and 3.2 km/s at
z=0.256. The full resolution images will have a beam size of
15"x15"/sin(declination), and tapered data products (i.e., 30"
resolution images) will also be available. The shallow survey will cover
~3500 square degrees with a four-sigma HI imaging sensitivity of
2.5x10^20 atoms cm^-2 (20 km/s linewidth) at the highest resolution and
a continuum sensitivity of 15 uJy/beam (11 uJy/beam for polarization
data). The current plan calls for the medium deep survey to cover 450
square degrees and provide an HI imaging sensitivity of 1.0x10^20 atoms
cm^-2 at the highest resolution and a continuum sensitivity of 6
uJy/beam, close to the confusion limit (4 uJy/beam for polarization
data, not confusion limited). Up-to-date information on Apertif and the
planned surveys can be found at: http://www.apertif.nl.Commissioning of
the Apertif instrument is currently underway. Here we present first
results from the image commissioning, including the detection of HI
absorption plus continuum and HI imaging. These results highlight the
data quality that will be achieved for the surveys.
M3 - Meeting Abstract
VL - 229
JO - Bulletin of the American Astronomical Society
JF - Bulletin of the American Astronomical Society
SN - 0002-7537
T2 - 229th AAS MEETING
Y2 - 3 January 2017 through 7 January 2018
ER -