在前两个Ligo/处女座观察跑步期间，具有DECAM的重力波触发器的光学随访

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在前两个Ligo/处女座观察跑步期间，具有DECAM的重力波触发器的光学随访

Optical follow-up of gravitational wave triggers with DECam during the first two LIGO/VIRGO observing runs

论文作者

Herner, K., Annis, J., Brout, D., Soares-Santos, M., Kessler, R., Sako, M., Butler, R., Doctor, Z., Palmese, A., Allam, S., Tucker, D. L., Sobreira, F., Yanny, B., Diehl, H. T., Frieman, J., Glaeser, N., Garcia, A., Sherman, N. F., Bechtol, K., Berger, E., Chen, H. Y., Conselice, C. J., Cook, E., Cowperthwaite, P. S., Davis, T. M., Drlica-Wagner, A., Farr, B., Finley, D., Foley, R. J., Garcia-Bellido, J., Gill, M. S. S., Gruendl, R. A., Holz, D. E., Kuropatkin, N., Lin, H., Marriner, J., Marshall, J. L., Matheson, T., Neilsen, E., Paz-Chinchón, F., Sauseda, M., Scolnic, D., Williams, P. K. G., Avila, S., Bertin, E., Buckley-Geer, E., Burke, D. L., Rosell, A. Carnero, Carrasco-Kind, M., Carretero, J., da Costa, L. N., De Vicente, J., Desai, S., Doel, P., Eifler, T. F., Everett, S., Fosalba, P., Gaztanaga, E., Gerdes, D. W., Gschwend, J., Gutierrez, G., Hartley, W. G., Hollowood, D. L., Honscheid, K., James, D. J., Krause, E., Kuehn, K., Lahav, O., Li, T. S., Lima, M., Maia, M. A. G., March, M., Menanteau, F., Miquel, R., Plazas, A. A., Sanchez, E., Scarpine, V., Schubnell, M., Serrano, S., Sevilla-Noarbe, I., Smith, M., Suchyta, E., Tarle, G., Wester, W., Zhang, Y.

论文摘要

Ligo和处女座可检测到的重力波（GW）事件具有几个可能的祖细胞，包括黑洞合并，中子星星合并，黑洞 - 中子星星合并，超新星和宇宙弦尖。 GW事件的一部分有望产生电磁（EM）发射，一旦检测到，该发射将提供有关其天体物理环境的互补信息。为此，LIGO-VIRGO合作（LVC）将GW候选人提醒发送给天文学社区，以便可以追求搜索其EM对应物的搜索。 DESGW组由黑暗能源调查（DES），LVC和天文学社区的其他成员组成，使用Dark Energy Camera（DECAM）来执行LVC GW事件光学签名的搜索和发现程序。 DESGW的目的是将GW事件样本用作宇宙学的标准警报器。由于预期的EM对应物的衰减时间尺度很短，并且需要快速消除没有候选者的调查区域，因此至关重要的是，尽可能快地完成对每晚图像的初步分析。我们讨论我们的搜索区域确定，成像管道和候选选择过程。我们在前两个Ligo-Virgo观察活动中回顾了DESGW计划的结果，并介绍了我们的管道实现的其他科学应用。

Gravitational wave (GW) events detectable by LIGO and Virgo have several possible progenitors, including black hole mergers, neutron star mergers, black hole--neutron star mergers, supernovae, and cosmic string cusps. A subset of GW events are expected to produce electromagnetic (EM) emission that, once detected, will provide complementary information about their astrophysical context. To that end, the LIGO--Virgo Collaboration (LVC) sends GW candidate alerts to the astronomical community so that searches for their EM counterparts can be pursued. The DESGW group, consisting of members of the Dark Energy Survey (DES), the LVC, and other members of the astronomical community, uses the Dark Energy Camera (DECam) to perform a search and discovery program for optical signatures of LVC GW events. DESGW aims to use a sample of GW events as standard sirens for cosmology. Due to the short decay timescale of the expected EM counterparts and the need to quickly eliminate survey areas with no counterpart candidates, it is critical to complete the initial analysis of each night's images as quickly as possible. We discuss our search area determination, imaging pipeline, and candidate selection processes. We review results from the DESGW program during the first two LIGO--Virgo observing campaigns and introduce other science applications that our pipeline enables.

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