[Graduados] 27/09 - 13h - Seminario FCAG "Follow-up of Gravitational Waves and explosive transients: Optimized strategies and prospects for novel discoveries" - Dr. Clécio R. de Bom (CBPF, Brasil)

[Secretaría de Ciencia y Técnica]

A toda la comunidad,

les informamos que el próximo miércoles 27 de septiembre a las 13h, en 
el Salón Meridiano, se brindará la siguiente charla en el marco de los 
Seminarios de la FCAG: *"**Follow-up of Gravitational Waves and 
explosive transients: Optimized strategies and prospects for novel 
discoveries**"*.**La misma estará a cargo del*Dr. Clécio R. de Bom 
(**Centro Brasileño de Pesquisas Fisicas -CBPF- Brasil)*,**profesor 
invitado por la Dra. Analía Smith Castelli. A continuación les dejamos 
el resumen y los datos de conexión para aquellos que no puedan acercarse 
al Salón Meridiano.

*Resumen: *Transient astrophysical phenomena has a range of interest 
that goes trough different fields of astrophysics and cosmology and are 
one of the most interesting subjects in time-domain and multi-messenger 
astronomy. Those fields has undergone a revolution over the past years. 
With the detection of an electromagnetic counterpart to the 
gravitational wave (GW) event GW170817 from a binary neutron stars 
merger, new techniques and resources to study astrophysical transients 
in the multi-messenger context have increased.Once in its design 
sensitivity, the current LIGO-Virgo-KAGRA (O4) season is expected to 
explore ∼7x more detections of Binary Neutron star (BNS) events than O3. 
EM follow-up of many O4 events should require telescopes with limited 
Target-of-Opportunity (ToO) availability.

We present the S-PLUS Transient Extension Program (STEP): a explosive 
transient survey conducted in the Southern Hemisphere using data from 
the Southern Photometric Local Universe Survey (S-PLUS) Main Survey. 
Additionally, We address the problem of optimally identifying all 
kilonovae.  We optimize our strategy for kilonova confirmation while 
minimizing telescope time. For a wide range of kilonova parameters, 
corresponding to a fainter, redder kilonova compared to 
GW170817/AT2017gfo we find that the discovery probability with the DECam 
is ∼80% at the nominal BNS gravitational wave detection limit for O4, a 
∼30% improvement compared to the O3 strategy.  For AT2017gfo-like 
kilonova, we find ∼90% probability out to 330 Mpc.

Furthermore, as most expected events are Binary Black Holes, we explore 
the possibility of Standard Sirens in association with AGN flares. Our 
formalism requires GW localization area monitoring only without needing 
ToO spectra since we don't require identifying the host of each BBH 
merger. Thus, a hybrid method between bright and dark sirens.  We 
simulate O4 season and derive the expected constraints in H_0, \Omega_m, 
and $w$.
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*Datos de conexión:*

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Unirse a la reunión zoom: https://us02web.zoom.us/j/89642687970
ID de reunión: 896 4268 7970
Código de acceso: 526656

*A fin de reducir el uso de residuos plásticos, les solicitamos que se 
acerquen con sus propias tazas para el café. *

Aunque este seminario será en formato híbrido, esperamos contar con su 
presencia.

Atentamente,

Secyt-FCAG












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