scholarly journals J-GEM follow-up observations of the gravitational wave source GW151226*

2016 ◽  
Vol 69 (1) ◽  
pp. 9 ◽  
Author(s):  
Michitoshi Yoshida ◽  
Yousuke Utsumi ◽  
Nozomu Tominaga ◽  
Tomoki Morokuma ◽  
Masaomi Tanaka ◽  
...  
Keyword(s):  
Gravitational Wave ◽  
Wave Source

scholarly journals J-GEM follow-up observations to search for an optical counterpart of the first gravitational wave source GW150914

2016 ◽  
Vol 68 (4) ◽  
pp. L9 ◽  
Author(s):  
Tomoki Morokuma ◽  
Masaomi Tanaka ◽  
Yuichiro Asakura ◽  
Fumio Abe ◽  
Paul J. Tristram ◽  
...  
Keyword(s):  
Gravitational Wave ◽  
Optical Counterpart ◽  
Wave Source

The Electromagnetic Counterpart of the Gravitational Wave Source GW170817

2017 ◽  
Vol 14 (S339) ◽  
pp. 56-60
Author(s):  
T.-W. Chen
Keyword(s):  
Neutron Star ◽  
Gravitational Wave ◽  
Near Infrared ◽  
Direct Evidence ◽  
Gamma Ray ◽  
Infrared Imaging ◽  
Wave Source ◽  
Strong Source ◽  
Process Elements

AbstractOn 17th August 2017 a strong source of gravitational waves was detected by the LIGO-Virgo collaboration. The signal lasted for 60 seconds, and the event was followed just 2 seconds later by a short burst of gamma-rays that was detected by Fermi and INTEGRAL. The gravitational-wave and gamma-ray source had consistent sky positions to within about 30 square degrees. Within 10 hours of the gravitational-wave source event, a fast fading optical and near-infrared counterpart was discovered, which was subsequently followed-up and studied intensively for several weeks and months by numerous facilities. This talk presented the results from our optical and near-infrared imaging and spectroscopic follow-up campaign of this unprecedented discovery, which was the first electromagnetic counterpart of a gravitational-wave source, the first identification of a neutron star–neutron star merger, and the first direct evidence of the source of r-process elements. It focussed on the results of the GROND and ePESSTO teams, showing that this remarkable transient truly opened up the era of multi-messenger astronomy.

scholarly journals Observations of the first electromagnetic counterpart to a gravitational wave source by the TOROS collaboration

2017 ◽  
Vol 13 (S338) ◽  
pp. 80-83
Author(s):  
Lucas M. Macri ◽  
Mario C. Díaz ◽  
Diego Garcia Lambas ◽  
Keyword(s):  
Gravitational Wave ◽  
Light Curves ◽  
The South ◽  
Wave Source ◽  
Fast Fading

AbstractWe present the results of prompt optical follow-up of the electromagnetic counterpart of GW170817 by the Transient Optical Robotic Observatory of the South Collaboration (TOROS). We detected highly significant dimming in the light curves of the counterpart over the course of only 80 minutes of observations obtained ~35 hr after the trigger with the T80-South telescope. A second epoch of observations, obtained ~59 hr after the event with the EABA 1.5m telescope, confirms the fast fading nature of the transient. The observed colors of the counterpart suggest that this event was a “blue kilonova” relatively free of lanthanides.

scholarly journals The H.E.S.S. gravitational wave rapid follow-up program

2021 ◽  
Vol 2021 (03) ◽  
pp. 045
Author(s):  
Halim Ashkar ◽  
Francois Brun ◽  
Matthias Füßling ◽  
Clemens Hoischen ◽  
Stefan Ohm ◽  
...  
Keyword(s):  
Gravitational Wave

scholarly journals Processing GOTO data with the Rubin Observatory LSST Science Pipelines I: Production of coadded frames

2021 ◽  
Vol 38 ◽  
Author(s):  
J. R. Mullaney ◽  
L. Makrygianni ◽  
V. Dhillon ◽  
S. Littlefair ◽  
K. Ackley ◽  
...  
Keyword(s):  
Gravitational Wave ◽  
Time Domain ◽  
Wide Area ◽  
Wide Field ◽  
Process Data ◽  
Data Production ◽  
The Time Domain ◽  
Further Development ◽  
High Cadence

Abstract The past few decades have seen the burgeoning of wide-field, high-cadence surveys, the most formidable of which will be the Legacy Survey of Space and Time (LSST) to be conducted by the Vera C. Rubin Observatory. So new is the field of systematic time-domain survey astronomy; however, that major scientific insights will continue to be obtained using smaller, more flexible systems than the LSST. One such example is the Gravitational-wave Optical Transient Observer (GOTO) whose primary science objective is the optical follow-up of gravitational wave events. The amount and rate of data production by GOTO and other wide-area, high-cadence surveys presents a significant challenge to data processing pipelines which need to operate in near-real time to fully exploit the time domain. In this study, we adapt the Rubin Observatory LSST Science Pipelines to process GOTO data, thereby exploring the feasibility of using this ‘off-the-shelf’ pipeline to process data from other wide-area, high-cadence surveys. In this paper, we describe how we use the LSST Science Pipelines to process raw GOTO frames to ultimately produce calibrated coadded images and photometric source catalogues. After comparing the measured astrometry and photometry to those of matched sources from PanSTARRS DR1, we find that measured source positions are typically accurate to subpixel levels, and that measured L-band photometries are accurate to $\sim50$ mmag at $m_L\sim16$ and $\sim200$ mmag at $m_L\sim18$ . These values compare favourably to those obtained using GOTO’s primary, in-house pipeline, gotophoto, in spite of both pipelines having undergone further development and improvement beyond the implementations used in this study. Finally, we release a generic ‘obs package’ that others can build upon, should they wish to use the LSST Science Pipelines to process data from other facilities.

scholarly journals MAGIC electromagnetic follow-up of gravitational wave alerts

2016 ◽  
Vol 12 (S324) ◽  
pp. 287-290
Author(s):  
Barbara De Lotto ◽  
Stefano Ansoldi ◽  
Angelo Antonelli ◽  
Alessio Berti ◽  
Alessandro Carosi ◽  
...  
Keyword(s):  
Black Hole ◽  
Data Analysis ◽  
Gravitational Wave ◽  
Laser Interferometer ◽  
Cherenkov Telescopes ◽  
Direct Observations ◽  
Binary Black Hole ◽  
Set Up

AbstractThe year 2015 witnessed the first direct observations of a transient gravitational-wave (GW) signal from binary black hole mergers by the Advanced Laser Interferometer Gravitational-wave Observatory (aLIGO) Collaboration with the Virgo Collaboration. The MAGIC two 17m diameter Cherenkov telescopes system joined since 2014 the vast collaboration of electromagnetic facilities for follow-up of gravitational wave alerts. During the 2015 LIGO-Virgo science run we set up the procedure for GW alerts follow-up and took data following the last GW alert. MAGIC results on the data analysis and prospects for the forthcoming run are presented.

scholarly journals OBSERVATORIO EL SAUCE: HOSTING ROBOTIC SCIENCE IN CHILE

2021 ◽  
Vol 53 ◽  
pp. 47-49
Author(s):  
S. Ropert ◽  
R. Rojas ◽  
V. Suc ◽  
A. Zapata ◽  
J. Fertil ◽  
...  
Keyword(s):  
Gravitational Wave

The "El Sauce" Observatory is a robotic remote observatory in Chile designed for hosting medium and small sized telescopes (<≈ 1m diameter). It currently hosts telescopes used for astro-photography, private and scientific purposes. Telescopes at El Sauce have been contributing regularly to follow-up of TESS objects of interests, and have participated in follow-up of gravitational wave events. In this work we describe the observatory, its infrastructure, and future scientific facilities that are planning to install at "El Sauce" such as a node of the ATLAS project.

scholarly journals A comparison between short GRB afterglows and kilonova AT2017gfo: shedding light on kilonovae properties

2020 ◽  
Vol 493 (3) ◽  
pp. 3379-3397 ◽  
Author(s):  
A Rossi ◽  
G Stratta ◽  
E Maiorano ◽  
D Spighi ◽  
N Masetti ◽  
...  
Keyword(s):  
Gravitational Wave ◽  
Gamma Ray ◽  
Light Curves ◽  
Optical Counterpart ◽  
Wave Source ◽  
Gamma Ray Burst ◽  
Nir Light ◽  
First Time ◽  
Short Grbs

ABSTRACT Multimessenger astronomy received a great boost following the discovery of kilonova (KN) AT2017gfo, the optical counterpart of the gravitational wave source GW170817 associated with the short gamma-ray burst GRB 170817A. AT2017gfo was the first KN that could be extensively monitored in time using both photometry and spectroscopy. Previously, only few candidates have been observed against the glare of short GRB afterglows. In this work, we aim to search the fingerprints of AT2017gfo-like KN emissions in the optical/NIR light curves of 39 short GRBs with known redshift. For the first time, our results allow us to study separately the range of luminosity of the blue and red components of AT2017gfo-like kilonovae in short GRBs. In particular, the red component is similar in luminosity to AT2017gfo, while the blue KN can be more than 10 times brighter. Finally, we exclude a KN as luminous as AT2017gfo in GRBs 050509B and 061201.

scholarly journals Optical follow-up of gravitational wave triggers with DECam

2017 ◽  
Vol 898 ◽  
pp. 032050 ◽  
Author(s):  
K Herner ◽  
J Annis ◽  
E Berger ◽  
D Brout ◽  
R Butler ◽  
...  
Keyword(s):  
Gravitational Wave
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