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Title: Optical follow-up of gravitational wave triggers with DECam

Abstract

Gravitational wave (GW) events have several possible progenitors, including black hole mergers, cosmic string cusps, supernovae, neutron star mergers, and black hole{neutron star mergers. 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 has partnered with other teams to send GW candidate alerts so that searches for their EM counterparts can be pursued. One such partner is the Dark Energy Survey (DES) and Dark Energy Camera (DECam) Gravitational Waves Program (DES- GW). Situated on the 4m Blanco Telescope at the Cerro Tololo Inter-American Observatory in Chile, DECam is an ideal instrument for optical followup observations of GW triggers in the southern sky. The DES-GW program performs subtraction of new search images with respect to preexisting overlapping images to select candidate sources. 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 within 24 hours. The computational challenges in achieving this goal include maintaining robust I/O pipelines during the processing, being able to quickly acquire templatemore » images of new sky regions outside of the typical DES observing regions, and being able to rapidly provision additional batch computing resources with little advance notice. We will discuss the search area determination, imaging pipeline, general data transfer strategy, and methods to quickly increase the available amount of batch computing. We will present results from the rst season of observations from September 2015 to January 2016 and conclude by presenting improvements planned for the second observing season.« less

Authors:
 [1];  [1];  [2];  [3];  [1];  [4];  [2];  [1];  [4];  [1];  [4];  [1];  [1];  [3];  [3];  [1];  [1];  [1];  [5];  [3] more »;  [1];  [6];  [1] « less
  1. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  2. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States)
  3. Univ. of Pennsylvania, Philadelphia, PA (United States)
  4. Univ. of Chicago, IL (United States)
  5. Univ. College London (United Kingdom); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  6. Laboratorio Interinstitucional de e-Astronomia, Rio de Janeiro (Brazil); Universidade de Campinas (Brazil)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1355919
Report Number(s):
[FERMILAB-CONF-16-659-CD]
[Journal ID: ISSN 1742-6588; 1598209]
Grant/Contract Number:  
[AC02-07CH11359]
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physics. Conference Series
Additional Journal Information:
[ Journal Volume: 898; Conference: 22nd International Conference on Computing in High Energy and Nuclear Physics, San Francisco, CA, 10/14-10/16/2016]; Journal ID: ISSN 1742-6588
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Herner, K., Annis, J., Berger, E., Brout, D., Butler, R., Chen, H., Cowperthwaite, P., Diehl, H., Doctor, Z., Drlica-Wagner, A., Farr, B., Finley, D., Frieman, J., Holz, D., Kessler, R., Lin, H., Marriner, J., Nielsen, E., Palmese, A., Sako, M., Soares-Santos, M., Sobreira, F., and Yanny, B. Optical follow-up of gravitational wave triggers with DECam. United States: N. p., 2017. Web. doi:10.1088/1742-6596/898/3/032050.
Herner, K., Annis, J., Berger, E., Brout, D., Butler, R., Chen, H., Cowperthwaite, P., Diehl, H., Doctor, Z., Drlica-Wagner, A., Farr, B., Finley, D., Frieman, J., Holz, D., Kessler, R., Lin, H., Marriner, J., Nielsen, E., Palmese, A., Sako, M., Soares-Santos, M., Sobreira, F., & Yanny, B. Optical follow-up of gravitational wave triggers with DECam. United States. doi:10.1088/1742-6596/898/3/032050.
Herner, K., Annis, J., Berger, E., Brout, D., Butler, R., Chen, H., Cowperthwaite, P., Diehl, H., Doctor, Z., Drlica-Wagner, A., Farr, B., Finley, D., Frieman, J., Holz, D., Kessler, R., Lin, H., Marriner, J., Nielsen, E., Palmese, A., Sako, M., Soares-Santos, M., Sobreira, F., and Yanny, B. Sun . "Optical follow-up of gravitational wave triggers with DECam". United States. doi:10.1088/1742-6596/898/3/032050. https://www.osti.gov/servlets/purl/1355919.
@article{osti_1355919,
title = {Optical follow-up of gravitational wave triggers with DECam},
author = {Herner, K. and Annis, J. and Berger, E. and Brout, D. and Butler, R. and Chen, H. and Cowperthwaite, P. and Diehl, H. and Doctor, Z. and Drlica-Wagner, A. and Farr, B. and Finley, D. and Frieman, J. and Holz, D. and Kessler, R. and Lin, H. and Marriner, J. and Nielsen, E. and Palmese, A. and Sako, M. and Soares-Santos, M. and Sobreira, F. and Yanny, B.},
abstractNote = {Gravitational wave (GW) events have several possible progenitors, including black hole mergers, cosmic string cusps, supernovae, neutron star mergers, and black hole{neutron star mergers. 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 has partnered with other teams to send GW candidate alerts so that searches for their EM counterparts can be pursued. One such partner is the Dark Energy Survey (DES) and Dark Energy Camera (DECam) Gravitational Waves Program (DES- GW). Situated on the 4m Blanco Telescope at the Cerro Tololo Inter-American Observatory in Chile, DECam is an ideal instrument for optical followup observations of GW triggers in the southern sky. The DES-GW program performs subtraction of new search images with respect to preexisting overlapping images to select candidate sources. 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 within 24 hours. The computational challenges in achieving this goal include maintaining robust I/O pipelines during the processing, being able to quickly acquire template images of new sky regions outside of the typical DES observing regions, and being able to rapidly provision additional batch computing resources with little advance notice. We will discuss the search area determination, imaging pipeline, general data transfer strategy, and methods to quickly increase the available amount of batch computing. We will present results from the rst season of observations from September 2015 to January 2016 and conclude by presenting improvements planned for the second observing season.},
doi = {10.1088/1742-6596/898/3/032050},
journal = {Journal of Physics. Conference Series},
number = ,
volume = [898],
place = {United States},
year = {2017},
month = {10}
}

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