Astropy/Astroquery: V0.3.8 Release

Ginsburg, Adam; Sipőcz, Brigitta; Parikh, Madhura; Woillez, J.; Groener, Austen; Liedtke, Simon; Robitaille, Thomas; jcsegovia,; Deil, C.; Norman, Henrik; Brasseur, C. E.; Svoboda, Brian; Tollerud, Erik; Val-Borro, Miguel de; Persson, M. V.; adamginsburg,; Cowperthwaite, P. S.; Séguin-Charbonneau, Loïc; Collom, David; Armstrong, Caden; Morris, Brett M.; Mirocha, Jordan; Cardenzana, J. V; Yadav, Ayush; Seifert, Michael; Droettboom, Michael; Moolekamp, Fred; james-allen,; Mesh, Christian; Bostroem, Azalee

doi:10.5281/zenodo.1234036

Cited by 4 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Indeed, we do not observe any correlation between our mea- sured surface brightnesses and redshift. We downloaded the background-subtracted u -band images from SDSS, sometimes multiple frames per field, using Astroquery (Ginsburg et al 2018) and calculated variance images according to the SDSS frame data model. We stacked the images of each host, weighting by inverse variance, and performed aperture photometry on the stacked image and the total variance image using a 5 × 5 pixel (1.…”

Section: Host Galaxies Of Other Sne Ibnmentioning

confidence: 99%

Type Ibn Supernovae May not all Come from Massive Stars

Hosseinzadeh

McCully

Zabludoff³

et al. 2019

ApJL

View full text Add to dashboard Cite

Because core-collapse supernovae are the explosions of massive stars, which have relatively short lifetimes, they occur almost exclusively in galaxies with active star formation. On the other hand, the Type Ibn supernova PS1-12sk exploded in an environment that is much more typical of thermonuclear (Type Ia) supernovae: on the outskirts of the brightest elliptical galaxy in a galaxy cluster. The lack of any obvious star formation at that location presented a challenge to models of Type Ibn supernovae as the explosions of very massive Wolf-Rayet stars. Here we present a supplementary search for star formation at the site of PS1-12sk, now that the supernova has faded, via deep ultraviolet (UV) imaging of the host cluster with the Hubble Space Telescope. We do not detect any UV emission within 1 kpc of the supernova location, which allows us deepen the limit on star formation rate by an order of magnitude compared to the original study on this event. In light of this new limit, we discuss whether or not the progenitors of Type Ibn supernovae can be massive stars, and what reasonable alternatives have been proposed.

show abstract

Section: Host Galaxies Of Other Sne Ibnmentioning

confidence: 99%

Type Ibn Supernovae May not all Come from Massive Stars

Hosseinzadeh

McCully

Zabludoff³

et al. 2019

ApJL

View full text Add to dashboard Cite

show abstract

“…Software: This research made use of community-developed core Python packages, including: Astroquery (Ginsburg et al 2018), Astropy (The Astropy Collaboration et al 2013), Matplotlib (Hunter 2007), SciPy (Jones et al 2001), Jupyter and the IPython Interactive Computing architecture (Pérez & Granger 2007;Kluyver et al 2016). Specific to exoplanet imaging, this research made use of the EXOSIMS exoplanet mission simulation package (Savransky et al 2017); for photon-counting, EMCCD Detect 4 , based on Nemati (2020); and for post-processing, the dimensionality reduction code for images using vectorized Nonnegative Matrix Factorization (NMF) in Python (Zhu 2016;Ren et al 2018;Ren 2020).…”

Section: Douglas Et Almentioning

confidence: 99%

Sensitivity of the Roman Coronagraph Instrument to Exozodiacal Dust

Douglas,

Debes,

Mennesson

et al. 2021

Preprint

View full text Add to dashboard Cite

Exozodiacal dust, warm debris from comets and asteroids in and near the habitable zone of stellar systems, reveals the physical processes that shape planetary systems. Scattered light from this dust is also a source of background flux which must be overcome by future missions to image Earthlike planets. This study quantifies the sensitivity of the Nancy Grace Roman Space Telescope Coronagraph to light scattered by exozodi, the zodiacal dust around other stars. Using a sample of 149 nearby stars, previously selected for optimum detection of habitable exoplanets by space observatories, we find the maximum number of exozodiacal

show abstract

Laser Guide Star for Large Segmented-aperture Space Telescopes. I. Implications for Terrestrial Exoplanet Detection and Observatory Stability

Douglas¹,

Males²,

Clark³

et al. 2019

View full text Add to dashboard Cite

Precision wavefront control on future segmented-aperture space telescopes presents significant challenges, particularly in the context of high-contrast exoplanet direct imaging. We present a new wavefront control architecture that translates the ground-based artificial guide star concept to space with a laser source aboard a second spacecraft, formation flying within the telescope field-of-view. We describe the motivating problem of mirror segment motion and develop wavefront sensing requirements as a function of guide star magnitude and segment motion power spectrum. Several sample cases with different values for transmitter power, pointing jitter, and wavelength are presented to illustrate the advantages and challenges of having a non-stellar-magnitude noise limited wavefront sensor for space telescopes. These notional designs allow increased control authority, potentially relaxing spacecraft stability requirements by two orders of magnitude, and increasing terrestrial exoplanet discovery space by allowing high-contrast observations of stars of arbitrary brightness.

show abstract

Astropy/Astroquery: V0.3.8 Release

Cited by 4 publications

References 0 publications

Type Ibn Supernovae May not all Come from Massive Stars

Type Ibn Supernovae May not all Come from Massive Stars

Sensitivity of the Roman Coronagraph Instrument to Exozodiacal Dust

Laser Guide Star for Large Segmented-aperture Space Telescopes. I. Implications for Terrestrial Exoplanet Detection and Observatory Stability

Contact Info

Product

Resources

About