List of works by Talvikki Hovatta

24 year monitoring of extragalactic sources at 22 and 37 GHz

scientific article

37 GHz observations of a large sample of BL Lacertae objects

scientific article

37 GHz observations of narrow-line Seyfert 1 galaxies

scientific article published in Astronomy and Astrophysics

A Decade of Multiwavelength Observations of the TeV Blazar 1ES 1215+303: Extreme Shift of the Synchrotron Peak Frequency and Long-term Optical–Gamma-Ray Flux Increase

scientific article published on 17 March 2020

A combined radio and GeV {gamma}-ray view of the 2012 and 2013 flares of Mrk 421 ⬇️

scientific article published in January 2015

A connection between γ-ray and parsec-scale radio flares in the blazar 3C 273

scientific article

A decade of joint MOJAVE– Fermi AGN monitoring: localization of the gamma-ray emission region

scientific article published on 25 November 2021

A fast, very-high-energy γ-ray flare from BL Lacertae during a period of multi-wavelength activity in June 2015

scientific article

A major 15 GHz radio flare in the blazar Mrk 421

scientific article

A method for the estimation of the significance of cross-correlations in unevenly sampled red-noise time series ⬇️

scientific article published on 29 September 2014

A multi-frequency study of brightness variations of the blazar 0716+714

scientific article published in January 2009

A quasi-periodic oscillation in the blazar J1359+4011

scientific article published on 27 September 2013

A search for spectral hysteresis and energy-dependent time lags from X-ray and TeV gamma-ray observations of Mrk 421 ⬇️

scientific article published in the Astrophysical Journal

AGILE detection of extremeγ-ray activity from the blazar PKS 1510-089 during March 2009

scientific article published in Astronomy and Astrophysics

An Exceptional Radio Flare in Markarian 421

An increase in the millimeter and centimeter band flux density of Mrk 421

An intermittent extreme BL Lac: MWL study of 1ES 2344+514 in an enhanced state

scientific article published on 17 June 2020

Another look at the BL Lacertae flux and spectral variability

scientific article published in Astronomy and Astrophysics

Blazar sequence - an artefact of Doppler boosting

scientific article published in January 2008

Challenging the one zone SSC model in VHE gamma ray emitting BL lacs: The interesting case of PKS 1424+240

Cluster analyses of gigahertz-peaked spectrum sources with self-organising maps

scientific article

Connecting radio variability to the characteristics of gamma-ray blazars

scientific article published on 15 January 2014

Connection between optical and γ-ray variability in blazars ⬇️

scientific article published on 30 January 2014

Constraining the Limiting Brightness Temperature and Doppler Factors for the Largest Sample of Radio-bright Blazars

scientific article published in the Astrophysical Journal

Constraining the physical conditions in the jets of {gamma}-ray flaring blazars using centimeter-band polarimetry and radiative transfer simulations. I. Data and models for 0420-014, OJ 287, and 1156+295 ⬇️

scientific article published in January 2014

Constraints on Particles and Fields from Full Stokes Observations of AGN

Correlation between Fermi/LAT gamma-ray and 37 GHz radio properties of northern AGN averaged over 11 months

scientific article published in January 2011

Detection of persistent VHE gamma-ray emission from PKS 1510–089 by the MAGIC telescopes during low states between 2012 and 2017

scientific article

Detection of the blazar S4 0954+65 at very-high-energy with the MAGIC telescopes during an exceptionally high optical state

scientific article published in Astronomy and Astrophysics

Disk-jet connection in the radio galaxy 3C 120 ⬇️

scientific article published in the Astrophysical Journal

Doppler factors, Lorentz factors and viewing angles for quasars, BL Lacertae objects and radio galaxies

scientific article published in January 2009

ERRATUM: “MOJAVE: MONITORING OF JETS IN ACTIVE GALACTIC NUCLEI WITH VLBA EXPERIMENTS. VIII. FARADAY ROTATION IN PARSEC-SCALE AGN JETS” (2012, AJ, 144, 105)

scientific article published in Astronomical Journal

ERRATUM: “MULTI-WAVELENGTH OBSERVATIONS OF THE FLARING GAMMA-RAY BLAZAR 3C 66A IN 2008 OCTOBER” (2011, ApJ, 726, 43)

scientific article published in the Astrophysical Journal

Early-time polarized optical light curve of GRB 131030A ⬇️

article by O. G. King et al published 14 October 2014 in Monthly Notices of the Royal Astronomical Society: Letters

Erratic flaring of BL Lac in 2012-2013: multiwavelength observations ⬇️

scientific article published in the Astrophysical Journal

Erratum: Optical polarization map of the Polaris Flare with RoboPol

scholarly article published in Monthly Notices of the Royal Astronomical Society

Evidence for a large-scale helical magnetic field in the quasar 3C 454.3

scholarly article

Extreme HBL behavior of Markarian 501 during 2012

scholarly article

FIRST NuSTAR OBSERVATIONS OF MRK 501 WITHIN A RADIO TO TeV MULTI-INSTRUMENT CAMPAIGN ⬇️

scientific article (publication date: 9 October 2015)

Faraday rotation in the MOJAVE blazars: 3C 273 a case study

Fermi large area telescope observations of Markarian 421: the missing piece of its spectral energy distribution ⬇️

scientific article published in the Astrophysical Journal

First broadband characterization and redshift determination of the VHE blazar MAGIC J2001+439 ⬇️

scientific article published in Astronomy and Astrophysics

First multi-wavelength campaign on the gamma-ray-loud active galaxy IC 310

scientific article published in Astronomy and Astrophysics

Flat Spectrum Radio Quasars through the MAGIC glasses

Follow-up radio observations of Nova Mon 2012 at 10 - 142 GHz

scientific article published in January 2012

GRB 131030A - RoboPol optical afterglow polarimetry

Gamma-rays from the quasar PKS 1441+25: story of an escape ⬇️

scientific article (publication date: 15 December 2015)

High radio-frequency properties and variability of brightest cluster galaxies ⬇️

scholarly article

High-energy gamma-ray observations of the accreting black hole V404 Cygni during its 2015 June outburst ⬇️

scientific article published on 19 July 2016

Insights into the emission of the blazar 1ES 1011+496 through unprecedented broadband observations during 2011 and 2012 ⬇️

scientific article published in Astronomy and Astrophysics

Interstellar scintillation, ISS, and intrinsic variability of radio AGN

scholarly article

Investigating the Blazar TXS 0506+056 through Sharp Multiwavelength Eyes During 2017–2019

scholarly article

Investigating the multiwavelength behaviour of the flat spectrum radio quasar CTA 102 during 2013–2017 ⬇️

scholarly article

Investigating the peculiar emission from the new VHE gamma-ray source H1722+119 ⬇️

scholarly article

Locating the {gamma}-ray emission site in Fermi/LAT blazars - II. Multifrequency correlations ⬇️

scholarly article

Locating the {gamma}-ray emission site in Fermi/LAT blazars from correlation analysis between 37 GHz radio and {gamma}-ray light curves ⬇️

scientific article published in January 2015

Long-term OVRO monitoring of LS I +61{deg}303: confirmation of the two close periodicities ⬇️

scientific article published in January 2015

Long-term multi-wavelength study of 1ES 0647+250

scientific article published in February 2023

Long-term multi-wavelength variability and correlation study of Markarian 421 from 2007 to 2009 ⬇️

scientific article published in Astronomy and Astrophysics

Long-term optical monitoring of TeV emitting blazars. I. Data analysis

scholarly article

Long-term radio variability of AGN: flare characteristics

scientific article

Long-term variability of radio-bright BL Lacertae objects

scientific article

MAGIC detection of short-term variability of the high-peaked BL Lac object 1ES 0806+524 ⬇️

scientific article

MAGIC gamma-ray and multi-frequency observations of flat spectrum radio quasar PKS 1510−089 in early 2012 ⬇️

scientific article published in Astronomy and Astrophysics

MAGIC long-term study of the distant TeV blazar PKS 1424+240 in a multiwavelength context ⬇️

scientific article published in Astronomy and Astrophysics

MAGIC observations and multifrequency properties of the flat spectrum radio quasar 3C 279 in 2011

scientific article published in Astronomy and Astrophysics

MOJAVE. XIX. Brightness Temperatures and Intrinsic Properties of Blazar Jets

scientific article published in December 2021

MOJAVE. XVII. Jet Kinematics and Parent Population Properties of Relativistically Beamed Radio-loud Blazars

scientific article

MOJAVE: Monitoring of Jets in Active Galactic Nuclei with VLBA Experiments. VIII. Faraday rotation in parsec-scale AGN jets

scientific article published in Astronomical Journal

MOJAVE: Monitoring of Jets in Active galactic nuclei with VLBA Experiments

scientific article published in Astronomy and Astrophysics

MWL Picture Of The Blazar S5 0716+714 During Its Brightest Outburst

Magnetic field at a jet base: extreme Faraday rotation in 3C 273 revealed by ALMA

scientific article

Multi-wavelength characterization of the blazar S5 0716+714 during an unprecedented outburst phase

scholarly article

Multi-wavelength observations of the flaring gamma-ray blazar 3C 66A in 2008 October ⬇️

scientific article published in the Astrophysical Journal

Multifrequency studies of the narrow-line Seyfert 1 galaxy SBS 0846+513

scientific article

Multifrequency study of the gamma-ray flaring BL Lacertae object PKS 2233–148 in 2009–2012

scientific article

Multimessenger Characterization of Markarian 501 during Historically Low X-Ray and γ-Ray Activity

scientific article published in June 2023

Multiwavelength Observations of the Blazar BL Lacertae: A New Fast TeV Gamma-Ray Flare

scientific article published in the Astrophysical Journal

Multiwavelength Picture of the Blazar S5 0716+714 during Its Brightest Outburst ⬇️

Multiwavelength behaviour of the blazar 3C 279: decade-long study from γ-ray to radio

scientific article published on 11 January 2020

Multiwavelength evidence for quasi-periodic modulation in the gamma-ray blazar PG 1553+113 ⬇️

scholarly article

Multiwavelength observations of 3C 454.3. III. Eighteen months of AGILE monitoring of the "Crazy Diamond" ⬇️

scientific article published in the Astrophysical Journal

Multiwavelength observations of Markarian 421 in 2005-2006 ⬇️

scientific article published in the Astrophysical Journal

Multiwavelength observations of the γ-ray flaring quasar S4 1030+61 in 2009–2014 ⬇️

scientific article

Multiwavelength observations of the γ-ray-emitting narrow-line Seyfert 1 PMN J0948+0022 in 2011

scientific article

Multiwavelength study of quiescent states of Mrk 421 with unprecedented hard X-ray coverage provided by NuSTAR in 2013 ⬇️

scientific article published in the Astrophysical Journal

NuSTARDETECTION OF THE BLAZAR B2 1023+25 AT REDSHIFT 5.3 ⬇️

scientific article published in the Astrophysical Journal

Optical and radio variability of the northern VHE gamma-ray emitting BL Lacertae objects ⬇️

scientific article published in January 2016

Optical photometric and radio monitoring of gamma-ray loud blazars

Optical polarization map of the Polaris Flare with RoboPol ⬇️

scholarly article

Optical polarization of gamma-ray bright blazars

Optical polarization of high-energy BL Lacertae objects ⬇️

scientific article published in Astronomy and Astrophysics

PKS 1502+106: a new and distant gamma-ray blazar in outburst discovered by the Fermi large area telescope ⬇️

scientific article published in the Astrophysical Journal

PKS 1954–388: RadioAstron Detection on 80,000 km Baselines and Multiwavelength Observations

Planck intermediate results XLV. Radio spectra of northern extragalactic radio sources ⬇️

scientific article

Probing the inner jet of the quasar PKS 1510-089 with multi-waveband monitoring during strong gamma-ray activity ⬇️

scientific article

Probing the very high energy γ-ray spectral curvature in the blazar PG 1553+113 with the MAGIC telescopes ⬇️

scientific article

Prominent activity of the blazar OJ 287 in 2005. XMM-Newton and multiwavelength observations

scholarly article

RAPID TeV GAMMA-RAY FLARING OF BL LACERTAE ⬇️

scientific article published in the Astrophysical Journal

Radio and γ-ray follow-up of the exceptionally high-activity state of PKS 1510−089 in 2011

scholarly article

Radio follow-up of the γ-ray flaring gravitational lens JVAS B0218+357 ⬇️

scientific article

Radio to gamma-ray connection in blazars

scientific article published in 2007

Radio-to-UV monitoring of AO 0235+164 by the WEBT and Swift during the 2006–2007 outburst

scientific article published in Astronomy and Astrophysics

Radio-to-γ-ray monitoring of the narrow-line Seyfert 1 galaxy PMN J0948 + 0022 from 2008 to 2011

scientific article published in Astronomy and Astrophysics

Rapid 15 GHz radio flare in the flat spectrum radio quasar CGRaBS J1738+3224

scientific article published in January 2013

Rapid millimeter and centimeter band flux density increase in the gamma-ray blazar BL Lacertae

scientific article published in January 2012

Reconciling inverse-Compton Doppler factors with variability Doppler factors in blazar jets

scientific article published in January 2017

Relativistic beaming and gamma-ray brightness of blazars

scientific article published in Astronomy and Astrophysics

Reversals in the Direction of Polarization Rotation in OJ 287

scientific article published in the Astrophysical Journal

RoboPol: AGN polarimetric monitoring data

scientific article published on 16 December 2020

RoboPol: a four-channel optical imaging polarimeter

scientific article

RoboPol: connection between optical polarization plane rotations and gamma-ray flares in blazars

scientific article

RoboPol: do optical polarization rotations occur in all blazars? ⬇️

scientific article

RoboPol: first season rotations of optical polarization plane in blazars ⬇️

scientific article

RoboPol: optical polarization-plane rotations and flaring activity in blazars ⬇️

scientific article

RoboPol: the optical polarization of gamma-ray-loud and gamma-ray-quiet blazars ⬇️

scientific article

Rotation of the optical polarization plane for the blazar OC 457

scientific article published in January 2015

SBS 0846+513: a new γ-ray-emitting narrow-line Seyfert 1 galaxy

scientific article

Search for AGN counterparts of unidentified Fermi-LAT sources with optical polarimetry

scientific article

Sensitivity of the Cherenkov Telescope Array for probing cosmology and fundamental physics with gamma-ray propagation

scientific article published on 23 February 2021

Sensitivity of the Cherenkov Telescope Array to a dark matter signal from the Galactic centre

scientific article published on 27 January 2021

Simultaneous long-term monitoring of LS I +61°303 by OVRO and Fermi-LAT

scientific article published on 25 April 2018

Spectral variability and multiwavelength studies of the high-frequency-peaked BL Lacertae object 1ES 0806+524 with the MAGIC telescopes

Statistical analyses of long-term variability of AGN at high radio frequencies

scientific article

Stochastic Modeling of Multiwavelength Variability of the Classical BL Lac Object OJ 287 on Timescales Ranging from Decades to Hours

scientific article published in the Astrophysical Journal

Studies of the jet in BL Lacertae. I. Recollimation shock and moving emission features ⬇️

scientific article published in the Astrophysical Journal

Studies of the jet in BL Lacertae. II. Superluminal Alfven waves ⬇️

scientific article published in the Astrophysical Journal

Symmetric Achromatic Variability in Active Galaxies: A Powerful New Gravitational Lensing Probe?

scientific article published in the Astrophysical Journal

TeV AND MULTI-WAVELENGTH OBSERVATIONS OF Mrk 421 IN 2006-2008 ⬇️

scholarly article

Testing the inverse-Compton catastrophe scenario in the intra-day variable blazar S5 0716+71. I. Simultaneous broadband observations during November 2003

scientific article published in Astronomy and Astrophysics

The 2009 multiwavelength campaign on Mrk 421: Variability and correlation studies ⬇️

scientific article published in Astronomy and Astrophysics

The GASP-WEBT monitoring of 3C 454.3 during the 2008 optical-to-radio and γ-ray outburst

scientific article published in Astronomy and Astrophysics

The Gamma-ray Activity of the high-z Quasar 0836+71

The Peculiar Light Curve of J1415+1320: A Case Study in Extreme Scattering Events

scientific article published in the Astrophysical Journal

The RINGO2 and DIPOL optical polarization catalogue of blazars ⬇️

scientific article published in January 2016

The RoboPol optical polarization survey of gamma-ray-loud blazars

scientific article

The RoboPol pipeline and control system

scholarly article

The WEBT Campaign on the Blazar 3C 279 in 2006 ⬇️

scientific article published in the Astrophysical Journal

The awakening of the γ-ray narrow-line Seyfert 1 galaxy PKS 1502+036 ⬇️

scientific article published on 14 September 2016

The broad-band properties of the intermediate synchrotron peaked BL Lac S2 0109+22 from radio to VHE gamma-rays

scholarly article

The connection between the 15 GHz radio and gamma-ray emission in blazars ⬇️

scientific article published in September 2014

The extreme behavior of the radio-loud narrow-line Seyfert 1 galaxy J0849+5108 ⬇️

scholarly article

The first Fermi multifrequency campaign on BL Lacertae: characterizing the low-activity state of the eponymous blazar ⬇️

scientific article published in the Astrophysical Journal

The high brightness temperature of B0529+483 revealed by RadioAstron and implications for interstellar scattering

scientific article

The most powerful flaring activity from the NLSy1 PMN J0948+0022 ⬇️

scientific article

The ordinary life of the γ-ray emitting narrow-line Seyfert 1 galaxy PKS 1502+036

scholarly article

The parsec-scale structure, kinematics, and polarization of radio-loud narrow-line Seyfert 1 galaxies ⬇️

scientific article published in September 2014

The presence of interstellar scintillation in the 15 GHz interday variability of 1158 OVRO-monitored blazars

scholarly article

The time-dependent distribution of optical polarization angle changes in blazars

scientific article published on 26 July 2021

Time correlation between the radio and gamma-ray activity in blazars and the production site of the gamma-ray emission ⬇️

scientific article

Unprecedented gamma-ray flare from PG1553+113 in spring 2012

article

Unraveling the Complex Behavior of Mrk 421 with Simultaneous X-Ray and VHE Observations during an Extreme Flaring Activity in 2013 April

scholarly article

Upcoming Kepler monitoring of OJ 287

scientific article published in January 2015

VLBA observations of a rare multiple quasar imaging event caused by refraction in the interstellar medium

scientific article published in Astronomy and Astrophysics

Very high energy {gamma}-rays from the universe's middle age: detection of the z = 0.940 blazar PKS 1441+25 with MAGIC ⬇️

scientific article

WEBT and XMM-Newton observations of 3C 454.3 during the post-outburst phase. Detection of the little and big blue bumps

scientific article published in Astronomy and Astrophysics

Wavelet analysis of a large sample of AGN at high radio frequencies

scientific article published in January 2008

Why have many of the brightest radio-loud blazars not been detected in gamma-rays by Fermi? ⬇️

γ-RAY AND PARSEC-SCALE JET PROPERTIES OF A COMPLETE SAMPLE OF BLAZARS FROM THE MOJAVE PROGRAM ⬇️

scientific article published in the Astrophysical Journal

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