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2022ApJ...929..115T - Astrophys. J., 929, 115-115 (2022/April-3)

SOAR/Goodman Spectroscopic Assessment of Candidate Counterparts of the LIGO/Virgo Event GW190814.

TUCKER D.L., WIESNER M.P., ALLAM S.S., SOARES-SANTOS M., BOM C.R., BUTNER M., GARCIA A., MORGAN R., OLIVARES F.E., PALMESE A., SANTANA-SILVA L., SHRIVASTAVA A., ANNIS J., GARCIA-BELLIDO J., GILL M.S.S., HERNER K., KILPATRICK C.D., MAKLER M., SHERMAN N., AMARA A., LIN H., SMITH M., SWANN E., ARCAVI I., BACHMANN T.G., BECHTOL K., BERLFEIN F., BRICENO C., BROUT D., BUTLER R.E., CARTIER R., CASARES J., CHEN H.-Y., CONSELICE C., CONTRERAS C., COOK E., COOKE J., DAGE K., D'ANDREA C., DAVIS T.M., DE CARVALHO R., DIEHL H.T., DIETRICH J.P., DOCTOR Z., DRLICA-WAGNER A., DROUT M., FARR B., FINLEY D.A., FISHBACH M., FOLEY R.J., FORSTER-BURON F., FOSALBA P., FRIEDEL D., FRIEMAN J., FROHMAIER C., GRUENDL R.A., HARTLEY W.G., HIRAMATSU D., HOLZ D.E., HOWELL D.A., KAWASH A., KESSLER R., KUROPATKIN N., LAHAV O., LUNDGREN A., LUNDQUIST M., MALIK U., MANN A.W., MARRINER J., MARSHALL J.L., MARTINEZ-VAZQUEZ C.E., McCULLY C., MENANTEAU F., MEZA N., NARAYAN G., NEILSEN E., NICOLAOU C., NICHOL R., PAZ-CHINCHON F., PEREIRA M.E.S., PINEDA J., POINTS S., QUIROLA-VASQUEZ J., REMBOLD S., REST A., RODRIGUEZ O., ROMER A.K., SAKO M., SALIM S., SCOLNIC D., SMITH J.A., STRADER J., SULLIVAN M., SWANSON M.E.C., THOMAS D., VALENTI S., VARGA T.N., WALKER A.R., WELLER J., WOOD M.L., YANNY B., ZENTENO A., AGUENA M., ANDRADE-OLIVEIRA F., BERTIN E., BROOKS D., BURKE D.L., CARNERO ROSELL A., CARRASCO KIND M., CARRETERO J., COSTANZI M., DA COSTA L.N., DE VICENTE J., DESAI S., EVERETT S., FERRERO I., FLAUGHER B., GAZTANAGA E., GERDES D.W., GRUEN D., GSCHWEND J., GUTIERREZ G., HINTON S.R., HOLLOWOOD D.L., HONSCHEID K., JAMES D.J., KUEHN K., LIMA M., MAIA M.A.G., MIQUEL R., OGANDO R.L.C., PIERES A., PLAZAS MALAGON A.A., RODRIGUEZ-MONROY M., SANCHEZ E., SCARPINE V., SCHUBNELL M., SERRANO S., SEVILLA-NOARBE I., SUCHYTA E., TARLE G., TO C., ZHANG Y. (The DES Collaboration)

Abstract (from CDS):

On 2019 August 14 at 21:10:39 UTC, the LIGO/Virgo Collaboration (LVC) detected a possible neutron star-black hole merger (NSBH), the first ever identified. An extensive search for an optical counterpart of this event, designated GW190814, was undertaken using the Dark Energy Camera on the 4 m Victor M. Blanco Telescope at the Cerro Tololo Inter-American Observatory. Target of Opportunity interrupts were issued on eight separate nights to observe 11 candidates using the 4.1 m Southern Astrophysical Research (SOAR) telescope's Goodman High Throughput Spectrograph in order to assess whether any of these transients was likely to be an optical counterpart of the possible NSBH merger. Here, we describe the process of observing with SOAR, the analysis of our spectra, our spectroscopic typing methodology, and our resultant conclusion that none of the candidates corresponded to the gravitational wave merger event but were all instead other transients. Finally, we describe the lessons learned from this effort. Application of these lessons will be critical for a successful community spectroscopic follow-up program for LVC observing run 4 (O4) and beyond.

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

Journal keyword(s): Gravitational waves - Spectroscopy - Neutron stars - Black holes

Simbad objects: 15

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