--- res: bibo_abstract: - "We present the discovery of AT 2024wpp (‘Whippet’), a fast and luminous 18cow-like transient. At a redshift of z = 0 . 0868 , revealed by Keck Cosmic Web Imager spectroscopy of its faint star-forming host, it is the fourth-nearest example of its class to date. Rapid identification of the source in the Zwicky Transient Facility data stream permitted ultraviolet-through- optical observations to be obtained prior to peak, allowing the first determination of the peak bolometric luminosity ( 2 ×1045 erg s−1 ), maximum photospheric radius ( 1015 cm), and total radiated energy ( 1051 erg) of an 18cow-like object. We present results from a comprehensive multiwavelength observing campaign, including a far-ultraviolet spectrum from the Cosmic Origins Spectrograph on the Hubble Space Telescope and deep imaging extending > 100 d post-explosion from the Very Large Telescope, Hubble Space Telescope , Very Large Array, and Atacama Large Millimetre Array. We interpret the observations under a model in which a rapidly accreting central engine blows a fast ( ∼0.2 c ) wind into the surrounding medium and irradiates it with X-rays. The high Doppler velocities and intense ionization within this wind prevent identifiable spectroscopic features from appearing in the ejecta or in the surrounding circumstellar material. Weak H and He signatures do emerge in the spectra after 35 d in the form of double-peaked narrow lines. Each peak is individually narrow (full width δv ∼3000 km s−1 ) but the two components are separated by \x03v ∼6600 km s−1 , indicating stable structures of denser material, possibly representing streams of tidal ejecta or an ablated companion star.@eng" bibo_authorlist: - foaf_Person: foaf_givenName: Daniel A foaf_name: Perley, Daniel A foaf_surname: Perley - foaf_Person: foaf_givenName: Anna Y Q foaf_name: Ho, Anna Y Q foaf_surname: Ho - foaf_Person: foaf_givenName: Zoë foaf_name: McGrath, Zoë foaf_surname: McGrath - foaf_Person: foaf_givenName: Michael foaf_name: Camilo, Michael foaf_surname: Camilo - foaf_Person: foaf_givenName: Cassie foaf_name: Sevilla, Cassie foaf_surname: Sevilla - foaf_Person: foaf_givenName: Ping foaf_name: Chen, Ping foaf_surname: Chen - foaf_Person: foaf_givenName: Genevieve foaf_name: Schroeder, Genevieve foaf_surname: Schroeder - foaf_Person: foaf_givenName: Taya foaf_name: Govreen-Segal, Taya foaf_surname: Govreen-Segal - foaf_Person: foaf_givenName: Aleksandra foaf_name: Bochenek, Aleksandra foaf_surname: Bochenek - foaf_Person: foaf_givenName: Yu-Jing foaf_name: Qin, Yu-Jing foaf_surname: Qin - foaf_Person: foaf_givenName: James H foaf_name: Gillanders, James H foaf_surname: Gillanders - foaf_Person: foaf_givenName: Benjamin foaf_name: Amend, Benjamin foaf_surname: Amend - foaf_Person: foaf_givenName: Joseph P foaf_name: Anderson, Joseph P foaf_surname: Anderson - foaf_Person: foaf_givenName: Igor foaf_name: Andreoni, Igor foaf_surname: Andreoni - foaf_Person: foaf_givenName: Amar foaf_name: Aryan, Amar foaf_surname: Aryan - foaf_Person: foaf_givenName: Eric C foaf_name: Bellm, Eric C foaf_surname: Bellm - foaf_Person: foaf_givenName: Joshua S foaf_name: Bloom, Joshua S foaf_surname: Bloom - foaf_Person: foaf_givenName: Thomas foaf_name: de Boer, Thomas foaf_surname: de Boer - foaf_Person: foaf_givenName: Jonathan foaf_name: Carney, Jonathan foaf_surname: Carney - foaf_Person: foaf_givenName: Ilaria foaf_name: Caiazzo, Ilaria foaf_surname: Caiazzo foaf_workInfoHomepage: http://www.librecat.org/personId=8ae5b6e7-2a03-11ee-914d-b58ed7a3b47d orcid: 0000-0002-4770-5388 - foaf_Person: foaf_givenName: Ken C foaf_name: Chambers, Ken C foaf_surname: Chambers - foaf_Person: foaf_givenName: Panos foaf_name: Charalampopoulos, Panos foaf_surname: Charalampopoulos - foaf_Person: foaf_givenName: Ting-Wan foaf_name: Chen, Ting-Wan foaf_surname: Chen - foaf_Person: foaf_givenName: Tracy X foaf_name: Chen, Tracy X foaf_surname: Chen - foaf_Person: foaf_givenName: Eric R foaf_name: Coughlin, Eric R foaf_surname: Coughlin - foaf_Person: foaf_givenName: Michael foaf_name: Coughlin, Michael foaf_surname: Coughlin - foaf_Person: foaf_givenName: Michel foaf_name: Dennefeld, Michel foaf_surname: Dennefeld - foaf_Person: foaf_givenName: Georgios foaf_name: Dimitriadis, Georgios foaf_surname: Dimitriadis - foaf_Person: foaf_givenName: Christoffer foaf_name: Fremling, Christoffer foaf_surname: Fremling - foaf_Person: foaf_givenName: Danielle foaf_name: Frostig, Danielle foaf_surname: Frostig - foaf_Person: foaf_givenName: Avishay foaf_name: Gal-Yam, Avishay foaf_surname: Gal-Yam - foaf_Person: foaf_givenName: Lluís foaf_name: Galbany, Lluís foaf_surname: Galbany - foaf_Person: foaf_givenName: Anjashay foaf_name: Gangopadhyay, Anjashay foaf_surname: Gangopadhyay - foaf_Person: foaf_givenName: Melzie foaf_name: Ghendrih, Melzie foaf_surname: Ghendrih - foaf_Person: foaf_givenName: Matthew J foaf_name: Graham, Matthew J foaf_surname: Graham - foaf_Person: foaf_givenName: Mariusz foaf_name: Gromadzki, Mariusz foaf_surname: Gromadzki - foaf_Person: foaf_givenName: Steven L foaf_name: Groom, Steven L foaf_surname: Groom - foaf_Person: foaf_givenName: Claudia P foaf_name: Gutiérrez, Claudia P foaf_surname: Gutiérrez - foaf_Person: foaf_givenName: K -Ryan foaf_name: Hinds, K -Ryan foaf_surname: Hinds - foaf_Person: foaf_givenName: Mark E foaf_name: Huber, Mark E foaf_surname: Huber - foaf_Person: foaf_givenName: Cosimo foaf_name: Inserra, Cosimo foaf_surname: Inserra - foaf_Person: foaf_givenName: Benjamin C foaf_name: Kaiser, Benjamin C foaf_surname: Kaiser - foaf_Person: foaf_givenName: Mansi M foaf_name: Kasliwal, Mansi M foaf_surname: Kasliwal - foaf_Person: foaf_givenName: Niilo E foaf_name: Koivisto, Niilo E foaf_surname: Koivisto - foaf_Person: foaf_givenName: Chien-Cheng foaf_name: Lin, Chien-Cheng foaf_surname: Lin - foaf_Person: foaf_givenName: Chang foaf_name: Liu, Chang foaf_surname: Liu - foaf_Person: foaf_givenName: Thomas B foaf_name: Lowe, Thomas B foaf_surname: Lowe - foaf_Person: foaf_givenName: Eugene foaf_name: Magnier, Eugene foaf_surname: Magnier - foaf_Person: foaf_givenName: Ashish A foaf_name: Mahabal, Ashish A foaf_surname: Mahabal - foaf_Person: foaf_givenName: Andrew foaf_name: Milligan, Andrew foaf_surname: Milligan - foaf_Person: foaf_givenName: Paloma foaf_name: Minguez, Paloma foaf_surname: Minguez - foaf_Person: foaf_givenName: Geoffrey foaf_name: Mo, Geoffrey foaf_surname: Mo - foaf_Person: foaf_givenName: Tomás E foaf_name: Müller-Bravo, Tomás E foaf_surname: Müller-Bravo - foaf_Person: foaf_givenName: Matt foaf_name: Nicholl, Matt foaf_surname: Nicholl - foaf_Person: foaf_givenName: Priscila J foaf_name: Pessi, Priscila J foaf_surname: Pessi - foaf_Person: foaf_givenName: Giuliano foaf_name: Pignata, Giuliano foaf_surname: Pignata - foaf_Person: foaf_givenName: Josiah foaf_name: Purdum, Josiah foaf_surname: Purdum - foaf_Person: foaf_givenName: Nabeel foaf_name: Rehemtulla, Nabeel foaf_surname: Rehemtulla - foaf_Person: foaf_givenName: R Michael foaf_name: Rich, R Michael foaf_surname: Rich - foaf_Person: foaf_givenName: Anwesha foaf_name: Sahu, Anwesha foaf_surname: Sahu - foaf_Person: foaf_givenName: Avinash foaf_name: Singh, Avinash foaf_surname: Singh - foaf_Person: foaf_givenName: Stephen J foaf_name: Smartt, Stephen J foaf_surname: Smartt - foaf_Person: foaf_givenName: Ian A foaf_name: Smith, Ian A foaf_surname: Smith - foaf_Person: foaf_givenName: Jesper foaf_name: Sollerman, Jesper foaf_surname: Sollerman - foaf_Person: foaf_givenName: Gokul foaf_name: Srinivasaragavan, Gokul foaf_surname: Srinivasaragavan - foaf_Person: foaf_givenName: Shubham foaf_name: Srivastav, Shubham foaf_surname: Srivastav - foaf_Person: foaf_givenName: Robert D foaf_name: Stein, Robert D foaf_surname: Stein - foaf_Person: foaf_givenName: Steve foaf_name: Schulze, Steve foaf_surname: Schulze - foaf_Person: foaf_givenName: Jack W foaf_name: Tweddle, Jack W foaf_surname: Tweddle - foaf_Person: foaf_givenName: Richard foaf_name: Wainscoat, Richard foaf_surname: Wainscoat - foaf_Person: foaf_givenName: Jacob L foaf_name: Wise, Jacob L foaf_surname: Wise - foaf_Person: foaf_givenName: Lin foaf_name: Yan, Lin foaf_surname: Yan - foaf_Person: foaf_givenName: David R foaf_name: Young, David R foaf_surname: Young bibo_doi: 10.1093/mnras/stag678 bibo_issue: '1' bibo_volume: 549 dct_date: 2026^xs_gYear dct_isPartOf: - http://id.crossref.org/issn/0035-8711 - http://id.crossref.org/issn/1365-2966 dct_language: eng dct_publisher: Oxford University Press@ dct_subject: - 'stars: black holes' - 'supernovae: individual: AT2024wpp' - 'radio continuum: transients' dct_title: 'AT 2024wpp: An extremely luminous fast ultraviolet transient powered by accretion onto a black hole@' ...