Studies of optical/gamma-ray flares of blazar 4C +01.02

Recent updates from the 2016-2017 observations

Fermi-LAT collaboration

Research output: Contribution to journalConference article

Abstract

The flat spectrum radio quasar 4C +01.02 became one of the brightest active galactic nuclei detected at high redshift (z = 2.1) in gamma rays when it underwent a series of outbursts during several months in 2016. We monitored this source in gamma rays using the Large Area Telescope onboard of the Fermi spacecraft (Fermi-LAT), and in optical using the Las Cumbres Observatory (LCO). The highest peak flux detected was F(E > 100 MeV) = (2.8 ± 0.3) 10 −6 ph cm −2 s −1 on 10 July 2016 (MJD 57579, daily average). We also obtained optical spectropolarimetry with the Robert Stobie Spectrograph on the Southern African Large Telescope (SALT-RSS) and observed a degree of linear polarisation of up to 10% during flaring states, and ∼1% during a quiescent period. We report recent updates we obtained in our time-domain and spectral studies of this source in July–August 2016, November–December 2016, and July 2017.

Original languageEnglish (US)
Article number013
JournalProceedings of Science
Volume319
StatePublished - Jan 1 2017
Event5th Annual Conference on High Energy Astrophysics in Southern Africa, HEASA 2017 - Johannesburg, South Africa
Duration: Oct 4 2017Oct 6 2017

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flares
gamma rays
telescopes
radio spectra
linear polarization
active galactic nuclei
quasars
spectrographs
observatories
spacecraft

All Science Journal Classification (ASJC) codes

  • General

Cite this

@article{06e0968449274e85ba07c06b91aeecd8,
title = "Studies of optical/gamma-ray flares of blazar 4C +01.02: Recent updates from the 2016-2017 observations",
abstract = "The flat spectrum radio quasar 4C +01.02 became one of the brightest active galactic nuclei detected at high redshift (z = 2.1) in gamma rays when it underwent a series of outbursts during several months in 2016. We monitored this source in gamma rays using the Large Area Telescope onboard of the Fermi spacecraft (Fermi-LAT), and in optical using the Las Cumbres Observatory (LCO). The highest peak flux detected was F(E > 100 MeV) = (2.8 ± 0.3) 10 −6 ph cm −2 s −1 on 10 July 2016 (MJD 57579, daily average). We also obtained optical spectropolarimetry with the Robert Stobie Spectrograph on the Southern African Large Telescope (SALT-RSS) and observed a degree of linear polarisation of up to 10{\%} during flaring states, and ∼1{\%} during a quiescent period. We report recent updates we obtained in our time-domain and spectral studies of this source in July–August 2016, November–December 2016, and July 2017.",
author = "{Fermi-LAT collaboration} and Britto, {Richard J.} and Marais, {Johannes P.} and {van Soelen}, Brian and Markus B{\"o}ttcher and Hester Schutte and Buckley, {David A.H.} and Falcone, {Abraham David}",
year = "2017",
month = "1",
day = "1",
language = "English (US)",
volume = "319",
journal = "Proceedings of Science",
issn = "1824-8039",
publisher = "Sissa Medialab Srl",

}

Studies of optical/gamma-ray flares of blazar 4C +01.02 : Recent updates from the 2016-2017 observations. / Fermi-LAT collaboration.

In: Proceedings of Science, Vol. 319, 013, 01.01.2017.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Studies of optical/gamma-ray flares of blazar 4C +01.02

T2 - Recent updates from the 2016-2017 observations

AU - Fermi-LAT collaboration

AU - Britto, Richard J.

AU - Marais, Johannes P.

AU - van Soelen, Brian

AU - Böttcher, Markus

AU - Schutte, Hester

AU - Buckley, David A.H.

AU - Falcone, Abraham David

PY - 2017/1/1

Y1 - 2017/1/1

N2 - The flat spectrum radio quasar 4C +01.02 became one of the brightest active galactic nuclei detected at high redshift (z = 2.1) in gamma rays when it underwent a series of outbursts during several months in 2016. We monitored this source in gamma rays using the Large Area Telescope onboard of the Fermi spacecraft (Fermi-LAT), and in optical using the Las Cumbres Observatory (LCO). The highest peak flux detected was F(E > 100 MeV) = (2.8 ± 0.3) 10 −6 ph cm −2 s −1 on 10 July 2016 (MJD 57579, daily average). We also obtained optical spectropolarimetry with the Robert Stobie Spectrograph on the Southern African Large Telescope (SALT-RSS) and observed a degree of linear polarisation of up to 10% during flaring states, and ∼1% during a quiescent period. We report recent updates we obtained in our time-domain and spectral studies of this source in July–August 2016, November–December 2016, and July 2017.

AB - The flat spectrum radio quasar 4C +01.02 became one of the brightest active galactic nuclei detected at high redshift (z = 2.1) in gamma rays when it underwent a series of outbursts during several months in 2016. We monitored this source in gamma rays using the Large Area Telescope onboard of the Fermi spacecraft (Fermi-LAT), and in optical using the Las Cumbres Observatory (LCO). The highest peak flux detected was F(E > 100 MeV) = (2.8 ± 0.3) 10 −6 ph cm −2 s −1 on 10 July 2016 (MJD 57579, daily average). We also obtained optical spectropolarimetry with the Robert Stobie Spectrograph on the Southern African Large Telescope (SALT-RSS) and observed a degree of linear polarisation of up to 10% during flaring states, and ∼1% during a quiescent period. We report recent updates we obtained in our time-domain and spectral studies of this source in July–August 2016, November–December 2016, and July 2017.

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