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<p>A toda la comunidad, <br>
</p>
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<p>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: <b>"</b><b>Follow-up
of Gravitational Waves and explosive transients: Optimized
strategies and prospects for novel discoveries</b><b>"</b>.<b>
</b>La misma estará a cargo del<b> Dr. Clécio R. de Bom (</b><b>Centro
Brasileño de Pesquisas Fisicas -CBPF- Brasil)</b>,<b> </b>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.</p>
<div><b>Resumen: </b>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.<br>
<br>
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.<br>
<br>
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 $w$.<br clear="all">
<div><b style="font-weight:normal;"
id="docs-internal-guid-84bbdb09-7fff-3b80-37a8-3bd0810a2176">
<p dir="ltr"
style="line-height:1.3800000000000001;text-align:
justify;margin-top:0pt;margin-bottom:0pt;"><b><br>
</b></p>
<p dir="ltr"
style="line-height:1.3800000000000001;text-align:
justify;margin-top:0pt;margin-bottom:0pt;"><b>Datos de
conexión:</b> </p>
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id="docs-internal-guid-84bbdb09-7fff-3b80-37a8-3bd0810a2176">
</b>
<div><b style="font-weight:normal;"
id="docs-internal-guid-84bbdb09-7fff-3b80-37a8-3bd0810a2176">
</b></div>
<div>Unirse a la reunión zoom: <a
href="https://us02web.zoom.us/j/89642687970"
class="moz-txt-link-freetext" moz-do-not-send="true">https://us02web.zoom.us/j/89642687970</a>
</div>
<div>ID de reunión: 896 4268 7970</div>
<div>Código de acceso: 526656</div>
<div><br>
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<div><b>A fin de reducir el uso de residuos plásticos, les
solicitamos que se acerquen con sus propias tazas para el
café. </b> </div>
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<div dir="auto">Aunque este seminario será en formato híbrido,
esperamos contar con su presencia.</div>
<div dir="auto"><br>
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<div dir="auto">Atentamente, <br>
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<p>Secyt-FCAG<br>
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