WFC3 Infrared Spectroscopic Parallel (WISP) Survey: Photometric and Emission Line Data Release
arxiv(2024)
摘要
We present reduced images and catalogues of photometric and emission line
data (∼230,000 and ∼8,000 sources, respectively) for the WFC3
Infrared Spectroscopic Parallel (WISP) Survey. These data are made publicly
available on the Mikulski Archive for Space Telescopes (MAST) and include
reduced images from various facilities: ground-based ugri, HST WFC3, and
Spitzer IRAC (Infrared Array Camera). Coverage in at least one additional
filter beyond the WFC3/IR data are available for roughly half of the fields
(227 out of 483), with ∼20
from u-band to IRAC 3.6μm (0.35-3.6μm). For the lower spatial
resolution (and shallower) ground-based and IRAC data, we perform PSF-matched,
prior-based, deconfusion photometry (i.e., forced-photometry) using the TPHOT
software to optimally extract measurements or upper limits. We present the
methodology and software used for the WISP emission line detection and visual
inspection. The former adopts a continuous wavelet transformation that
significantly reduces the number of spurious sources as candidates before the
visual inspection stage. We combine both WISP catalogues and perform SED
fitting on galaxies with reliable spectroscopic redshifts and multi-band
photometry to measure their stellar masses. We stack WISP spectra as functions
of stellar mass and redshift and measure average emission line fluxes and
ratios. We find that WISP emission line sources are typically `normal'
star-forming galaxies based on the Mass-Excitation diagram ([OIII]/Hβ vs.
M_⋆; 0.74更多
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