Cosmological Fast Optical Transients with the Zwicky Transient Facility: A Search for Dirty Fireballs

Ho, Anna Y. Q.; Perley, D.; Yao, Yuhan; Svinkin, D.; Postigo, A. de Ugarte; Perley, R. A.; Канн, Д. А.; Burns, E.; Andreoni, Igor; Bellm, Eric C.; Bissaldi, E.; Bloom, Joshua S.; Dekany, Richard; Drake, A. J.; Fernández, José Feliciano Agüí; Frederiks, D.; Graham, M. J.; Hristov, Boyan; Kasliwal, Mansi M.; Kulkarni, S. R.; Kumar, Harsh; Laher, Russ R.; Lysenko, A.; Mailyan, B.; Malacaria, C.; Miller, A. A.; Poolakkil, S.; Riddle, Reed; Ridnaia, A.; Rusholme, B.; Savchenko, V.; Sollerman, J.; Thöne, Christina; Tsvetkova, A.; Ulanov, M.; Kienlin, A. von

doi:10.48550/arxiv.2201.12366

Cited by 5 publications

(5 citation statements)

References 143 publications

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“…The best-fit power-law index is Γ X = 1.53 ± 0.03, and host galaxy absorption is N H = 1.09 +0. including superluminous SNe (SLSN), Type Ia SNe (SN Ia), core-collapse SNe [66][67][68] , luminous fast blue optical transients(LFBOTs) 41, 42, 45-47, 68, 69 , GRB afterglows 69,70…”

Section: Neutron Star Interior Composition Explorermentioning

confidence: 99%

A very luminous jet from the disruption of a star by a massive black hole

Andreoni

Coughlin

Perley

et al. 2022

Nature

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Tidal disruption events (TDEs) are bursts of electromagnetic energy released when supermassive black holes (SMBHs) at the centers of galaxies violently disrupt a star that passes too close 1 .TDEs provide a new window to study accretion onto SMBHs; in some rare cases, this accretion leads to launching of a relativistic jet 2-9 , but the necessary conditions are not fully understood.The best studied jetted TDE to date is Swift J1644+57, which was discovered in gamma-rays, but was too obscured by dust to be seen at optical wavelengths. Here we report the optical discovery of AT2022cmc, a rapidly fading source at cosmological distance (redshift z = 1.19325) whose unique lightcurve transitioned into a luminous plateau within days. Observations of a bright counterpart at other wavelengths, including X-rays, sub-millimeter, and radio, supports the interpretation of AT2022cmc as a jetted TDE containing a synchrotron "afterglow", likely launched by a SMBH with spin a 0.3. Using 4 years of Zwicky Transient Facility

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Section: Neutron Star Interior Composition Explorermentioning

confidence: 99%

A very luminous jet from the disruption of a star by a massive black hole

Andreoni

Coughlin

Perley

et al. 2022

Nature

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“…Kool et al (2021) discovered the afterglow about 38 minutes after the initial burst. They also reported a non-detection of the same object in serendipitous observations of the field about 1.9 hours prior to their first detection (see Andreoni et al (2021) and Ho et al (2022) for discovery details). Follow-up observations obtained by various groups (see for instance Table A2) revealed that the source was indeed the fading afterglow of GRB 210204A and measured the source redshift.…”

Section: X-ray Afterglowmentioning

confidence: 93%

The long-active afterglow of GRB 210204A: Detection of the most delayed flares in a Gamma-Ray Burst

Kumar,

Gupta,

Saraogi

et al. 2022

Preprint

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We present results from extensive broadband follow-up of GRB 210204A over the period of thirty days. We detect optical flares in the afterglow at 7.6 × 10 5 s and 1.1 × 10 6 s after the burst: the most delayed flaring ever detected in a GRB afterglow. At the source redshift of 0.876, the rest-frame delay is 5.8 × 10 5 s (6.71 d). We investigate possible causes for this flaring and conclude that the most likely cause is a refreshed shock in the jet. The prompt emission of the GRB is within the range of typical long bursts: it shows three disjoint emission episodes, which all follow the typical GRB correlations. This suggests that GRB 210204A might not have any special properties that caused late-time flaring, and the lack of such detections for other afterglows might be resulting from the paucity of late-time observations. Systematic late-time follow-up of a larger sample of GRBs can shed more light on such afterglow behaviour. Further analysis of the GRB 210204A shows that the late time bump in the light curve is highly unlikely due to underlying SNe at redshift (z) = 0.876 and is more likely due to the late time flaring activity. The cause of this variability is not clearly quantifiable due to the lack of multi-band data at late time constraints by bad weather conditions. The flare of GRB 210204A is the latest flare detected to date.

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“…Localizations for about a few dozen of the brightest GRBs per year are published in GCN circulars 8 . Recently, rapid IPN localizations have facilitated significant discoveries in the GRB field, e.g., the localization of the short GRB 170817A, the counterpart of the gravitational wave event GW170817 from a binary neutron star merger [22], the detection of the extragalactic magnetar giant flare in NGC 253 [111], the discovery and confirmation of the shortest GRB from a collapsar [112], and the association of a number of GRBs with fast optical transients [113].…”

Section: The Interplanetary Networkmentioning

confidence: 99%

Key Space and Ground Facilities in GRB Science

et al. 2022

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Gamma-ray bursts (GRBs) are short and intense flashes of γ-rays coming from deep space. GRBs were discovered more than a half century ago and now are observed across the whole electromagnetic spectrum from radio to very-high-energy gamma rays. They carry information about the powerful energy release during the final stage of stellar evolution, as well as properties of matter on the way to the observer. At present, space-based observatories detect on average approximately one GRB per day. In this review, we summarize key space and ground facilities that contribute to the GRB studies.

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Cosmological Fast Optical Transients with the Zwicky Transient Facility: A Search for Dirty Fireballs

Abstract: Dirty fireballs are a hypothesized class of relativistic massive-star explosions with an initial Lorentz factor Γ init below the Γ init ∼ 100 required to produce a long-duration gamma-ray burst (LGRB), but

Cited by 5 publications

References 143 publications

A very luminous jet from the disruption of a star by a massive black hole

A very luminous jet from the disruption of a star by a massive black hole

The long-active afterglow of GRB 210204A: Detection of the most delayed flares in a Gamma-Ray Burst

Key Space and Ground Facilities in GRB Science

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