Search Results - "Jha, S W"
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Simulations of the WFIRST Supernova Survey and Forecasts of Cosmological Constraints
Published in The Astrophysical journal (01-11-2018)“…The Wide Field InfraRed Survey Telescope (WFIRST) was the highest-ranked large space-based mission of the 2010 New Worlds, New Horizons decadal survey. It is…”
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Models and Simulations for the Photometric LSST Astronomical Time Series Classification Challenge (PLAsTiCC)
Published in Publications of the Astronomical Society of the Pacific (01-09-2019)“…We describe the simulated data sample for the Photometric Large Synoptic Survey Telescope (LSST) Astronomical Time Series Classification Challenge (PLAsTiCC),…”
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SALT3: An Improved Type Ia Supernova Model for Measuring Cosmic Distances
Published in The Astrophysical journal (01-12-2021)“…Abstract A spectral-energy distribution (SED) model for Type Ia supernovae (SNe Ia) is a critical tool for measuring precise and accurate distances across a…”
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The Early Detection and Follow-up of the Highly Obscured Type II Supernova 2016ija/DLT16am
Published in The Astrophysical journal (20-01-2018)“…Abstract We present our analysis of the Type II supernova DLT16am (SN 2016ija). The object was discovered during the ongoing (DLT40) one-day cadence supernova…”
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ASASSN-18tb: a most unusual Type Ia supernova observed by TESS and SALT
Published in Monthly notices of the Royal Astronomical Society (01-08-2019)“…ABSTRACT We present photometric and spectroscopic observations of the unusual Type Ia supernova ASASSN-18tb, including a series of Southern African Large…”
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Nebular Spectroscopy of the "Blue Bump" Type Ia Supernova 2017cbv
Published in The Astrophysical journal (10-08-2018)“…We present nebular phase optical and near-infrared spectroscopy of the Type Ia supernova (SN) 2017cbv. The early light curves of SN 2017cbv showed a prominent…”
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SN REFSDAL: PHOTOMETRY AND TIME DELAY MEASUREMENTS OF THE FIRST EINSTEIN CROSS SUPERNOVA
Published in The Astrophysical journal (20-03-2016)“…ABSTRACT We present the first year of Hubble Space Telescope imaging of the unique supernova (SN) "Refsdal," a gravitationally lensed SN at z = 1.488 0.001…”
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ASASSN-15lh: A highly super-luminous supernova
Published in Science (American Association for the Advancement of Science) (15-01-2016)“…We report the discovery of ASASSN-15lh (SN 2015L), which we interpret as the most luminous supernova yet found. At redshift z = 0.2326, ASASSN-15lh reached an…”
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Extensive HST ultraviolet spectra and multiwavelength observations of SN 2014J in M82 indicate reddening and circumstellar scattering by typical dust
Published in Monthly notices of the Royal Astronomical Society (01-10-2014)“…SN 2014J in M82 is the closest detected Type Ia supernova (SN Ia) in at least 28 yr and perhaps in 410 yr. Despite its small distance of 3.3 Mpc, SN 2014J is…”
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LensWatch. I. Resolved HST Observations and Constraints on the Strongly Lensed Type Ia Supernova 2022qmx (“SN Zwicky”)
Published in The Astrophysical journal (01-05-2023)“…Abstract Supernovae (SNe) that have been multiply imaged by gravitational lensing are rare and powerful probes for cosmology. Each detection is an opportunity…”
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JWST Low-resolution MIRI Spectral Observations of SN 2021aefx: High-density Burning in a Type Ia Supernova
Published in Astrophysical journal. Letters (01-03-2023)“…Abstract We present a JWST/MIRI low-resolution mid-infrared (MIR) spectroscopic observation of the normal Type Ia supernova (SN Ia) SN 2021aefx at +323 days…”
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The unexpected, long-lasting, UV rebrightening of the superluminous supernova ASASSN-15lh
Published in Monthly notices of the Royal Astronomical Society (01-04-2017)“…Given its peak luminosity and early-time spectra, ASASSN-15lh was classified as the most luminous supernova ever discovered. Here, we report a UV rebrightening…”
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Propagating Uncertainties in the SALT3 Model-training Process to Cosmological Constraints
Published in The Astrophysical journal. Supplement series (01-07-2023)“…Abstract Type Ia supernovae (SNe Ia) are standardizable candles that must be modeled empirically to yield cosmological constraints. To understand the…”
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Nebular-phase spectra of Type Ia supernovae from the Las Cumbres Observatory Global Supernova Project
Published in Monthly notices of the Royal Astronomical Society (22-02-2022)“…ABSTRACT The observed diversity in Type Ia supernovae (SNe Ia) – the thermonuclear explosions of carbon–oxygen white dwarf stars used as cosmological standard…”
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SN REFSDAL: CLASSIFICATION AS A LUMINOUS AND BLUE SN 1987A-LIKE TYPE II SUPERNOVA
Published in The Astrophysical journal (10-11-2016)“…ABSTRACT We have acquired Hubble Space Telescope (HST) and Very Large Telescope near-infrared spectra and images of supernova (SN) Refsdal after its discovery…”
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Discovery and Rapid Follow-up Observations of the Unusual Type II SN 2018ivc in NGC 1068
Published in The Astrophysical journal (01-05-2020)“…We present the discovery and high-cadence follow-up observations of SN 2018ivc, an unusual SNe II that exploded in NGC 1068 (D = 10.1 Mpc). The light curve of…”
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Results of the Photometric LSST Astronomical Time-series Classification Challenge (PLAsTiCC)
Published in The Astrophysical journal. Supplement series (01-08-2023)“…Abstract Next-generation surveys like the Legacy Survey of Space and Time (LSST) on the Vera C. Rubin Observatory (Rubin) will generate orders of magnitude…”
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SN 2022joj: A Potential Double Detonation with a Thin Helium Shell
Published in The Astrophysical journal (01-04-2024)“…Abstract We present photometric and spectroscopic data for SN 2022joj, a nearby peculiar Type Ia supernova (SN Ia) with a fast decline rate (Δ m 15,B = 1.4…”
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Two peculiar fast transients in a strongly lensed host galaxy
Published in Nature astronomy (01-04-2018)“…A massive galaxy cluster can serve as a magnifying glass for distant stellar populations, as strong gravitational lensing magnifies background galaxies and…”
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First-year Sloan Digital Sky Survey-II supernova results: consistency and constraints with other intermediate-redshift data sets
Published in Monthly notices of the Royal Astronomical Society (01-02-2010)“…We present an analysis of the luminosity distances of Type Ia Supernovae (SNe) from the Sloan Digital Sky Survey-II (SDSS-II) SN Survey in conjunction with…”
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