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2022ApJ...933...85A - Astrophys. J., 933, 85-85 (2022/July-1)

CALET Search for Electromagnetic Counterparts of Gravitational Waves during the LIGO/Virgo O3 Run.

ADRIANI O., AKAIKE Y., ASANO K., ASAOKA Y., BERTI E., BIGONGIARI G., BINNS W.R., BONGI M., BROGI P., BRUNO A., BUCKLEY J.H., CANNADY N., CASTELLINI G., CHECCHIA C., CHERRY M.L., COLLAZUOL G., EBISAWA K., FICKLIN A.W., FUKE H., GONZI S., GUZIK T.G., HAMS T., HIBINO K., ICHIMURA M., IOKA K., ISHIZAKI W., ISRAEL M.H., KASAHARA K., KATAOKA J., KATAOKA R., KATAYOSE Y., KATO C., KAWANAKA N., KAWAKUBO Y., KOBAYASHI K., KOHRI K., KRAWCZYNSKI H.S., KRIZMANIC J.F., MAESTRO P., MARROCCHESI P.S., MESSINEO A.M., MITCHELL J.W., MIYAKE S., MOISEEV A.A., MORI M., MORI N., MOTZ H.M., MUNAKATA K., NAKAHIRA S., NISHIMURA J., DE NOLFO G.A., OKUNO S., ORMES J.F., OSPINA N., OZAWA S., PACINI L., PAPINI P., RAUCH B.F., RICCIARINI S.B., SAKAI K., SAKAMOTO T., SASAKI M., SHIMIZU Y., SHIOMI A., SPILLANTINI P., STOLZI F., SUGITA S., SULAJ A., TAKITA M., TAMURA T., TERASAWA T., TORII S., TSUNESADA Y., UCHIHORI Y., VANNUCCINI E., WEFEL J.P., YAMAOKA K., YANAGITA S., YOSHIDA A., YOSHIDA K. and ZOBER W.V.

Abstract (from CDS):

The CALorimetric Electron Telescope (CALET) on the International Space Station consists of a high-energy cosmic-ray CALorimeter (CAL) and a lower-energy CALET Gamma-ray Burst Monitor (CGBM). CAL is sensitive to electrons up to 20 TeV, cosmic-ray nuclei from Z = 1 through Z ∼ 40, and gamma rays over the range 1 GeV-10 TeV. CGBM observes gamma rays from 7 keV to 20 MeV. The combined CAL-CGBM instrument has conducted a search for gamma-ray bursts (GRBs) since 2015 October. We report here on the results of a search for X-ray/gamma-ray counterparts to gravitational-wave events reported during the LIGO/Virgo observing run O3. No events have been detected that pass all acceptance criteria. We describe the components, performance, and triggering algorithms of the CGBM-the two Hard X-ray Monitors consisting of LaBr3(Ce) scintillators sensitive to 7 keV-1 MeV gamma rays and a Soft Gamma-ray Monitor BGO scintillator sensitive to 40 keV-20 MeV-and the high-energy CAL consisting of a charge detection module, imaging calorimeter, and the fully active total absorption calorimeter. The analysis procedure is described and upper limits to the time-averaged fluxes are presented.

Abstract Copyright: © 2022. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Gamma-ray astronomy - Gamma-ray bursts - Gravitational wave sources - Gamma-ray transient sources

Simbad objects: 5

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