Статья

The Spectroscopic Classification of Astronomical Transients (SCAT) Survey: Overview, Pipeline Description, Initial Results, and Future Plans

M. A. TuckerCenter for Cosmology and Astroparticle Physics, The Ohio State University, 191 West Woodruff Ave, Columbus, OH, USA; [email protected]B. J. ShappeeInstitute for Astronomy, University of Hawai‘i at Mānoa, 2680 Woodlawn Dr., Honolulu, HI, USAM. E. HuberInstitute for Astronomy, University of Hawai‘i at Mānoa, 2680 Woodlawn Dr., Honolulu, HI, USAA. V. PayneInstitute for Astronomy, University of Hawai‘i at Mānoa, 2680 Woodlawn Dr., Honolulu, HI, USAA. DoInstitute for Astronomy, University of Hawai‘i at Mānoa, 2680 Woodlawn Dr., Honolulu, HI, USAJason T. HinkleInstitute for Astronomy, University of Hawai‘i at Mānoa, 2680 Woodlawn Dr., Honolulu, HI, USAThomas de JaegerInstitute for Astronomy, University of Hawai‘i at Mānoa, 2680 Woodlawn Dr., Honolulu, HI, USAC. AshallDepartment of Physics, Virginia Tech, Blacksburg, VA 24061, USAD. DesaiInstitute for Astronomy, University of Hawai‘i at Mānoa, 2680 Woodlawn Dr., Honolulu, HI, USAW. B. HoogendamInstitute for Astronomy, University of Hawai‘i at Mānoa, 2680 Woodlawn Dr., Honolulu, HI, USAG. AlderingLawrence Berkeley National Laboratory, One Cyclotron Rd., Berkeley, CA, 94720, USAKatie AuchettlARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), AustraliaChristoph BaranecInstitute for Astronomy, University of Hawai‘i at Mānoa, Hilo, HI 96720, USAJ. BulgerInstitute for Astronomy, University of Hawai‘i at Mānoa, 2680 Woodlawn Dr., Honolulu, HI, USAK. C. ChambersInstitute for Astronomy, University of Hawai‘i at Mānoa, 2680 Woodlawn Dr., Honolulu, HI, USAMark ChunInstitute for Astronomy, University of Hawai‘i at Mānoa, Hilo, HI 96720, USAK. W. HodappInstitute for Astronomy, University of Hawai‘i at Mānoa, Hilo, HI 96720, USAT. LoweInstitute for Astronomy, University of Hawai‘i at Mānoa, 2680 Woodlawn Dr., Honolulu, HI, USALuke McKayInstitute for Astronomy, University of Hawai‘i at Mānoa, Hilo, HI 96720, USAR. RampyInstitute for Astronomy, University of Hawai‘i at Mānoa, 2680 Woodlawn Dr., Honolulu, HI, USAD. RubinInstitute for Astronomy, University of Hawai‘i at Mānoa, 2680 Woodlawn Dr., Honolulu, HI, USAJ. TonryInstitute for Astronomy, University of Hawai‘i at Mānoa, 2680 Woodlawn Dr., Honolulu, HI, USA

2022en

ABI

Аннотация

Abstract We present the Spectroscopic Classification of Astronomical Transients (SCAT) survey, which is dedicated to spectrophotometric observations of transient objects such as supernovae and tidal disruption events. SCAT uses the SuperNova Integral-Field Spectrograph (SNIFS) on the University of Hawai’i 2.2 m (UH2.2m) telescope. SNIFS was designed specifically for accurate transient spectrophotometry, including absolute flux calibration and host-galaxy removal. We describe the data reduction and calibration pipeline including spectral extraction, telluric correction, atmospheric characterization, nightly photometricity, and spectrophotometric precision. We achieve ≲5% spectrophotometry across the full optical wavelength range (3500–9000 Å) under photometric conditions. The inclusion of photometry from the SNIFS multi-filter mosaic imager allows for decent spectrophotometric calibration (10%–20%) even under unfavorable weather/atmospheric conditions. SCAT obtained ≈640 spectra of transients over the first 3 yr of operations, including supernovae of all types, active galactic nuclei, cataclysmic variables, and rare transients such as superluminous supernovae and tidal disruption events. These observations will provide the community with benchmark spectrophotometry to constrain the next generation of hydrodynamic and radiative transfer models.

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Идентификаторы

DOI: 10.1088/1538-3873/aca719

Цитирования и источники

Цитирований: 2Использованных источников: 0

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