Multiple Flares in the Changing-Look AGN NGC 5273
arXiv:2211.03801 · doi:10.1093/mnras/stad725
Abstract
NGC 5273 is a known optical and X-ray variable AGN. We analyze new and archival IR, optical, UV, and X-ray data in order to characterize its long-term variability from 2000 to 2022. At least one optical changing-look event occurred between 2011 and 2014, when the AGN changed from a Type 1.8/1.9 Seyfert to a Type 1. It then faded considerably at all wavelengths, followed by a dramatic but slow increase in UV/optical brightness between 2021 and 2022. Near-IR (NIR) spectra in 2022 show prominent broad Paschen lines that are absent in an archival spectrum from 2010, making NGC 5273 one of the few AGNs to be observed changing-look in the NIR. We propose that NGC 5273 underwent multiple changing-look events between 2000 and 2022 -- starting as a Type 1.8/1.9, NGC 5273 changes-look to a Type 1 temporarily in 2002 and again in 2014, reverting back to a Type 1.8/1.9 by 2005 and 2017, respectively. In 2022, it is again a Type 1 Seyfert. We characterize the changing-look events and their connection to the dynamic accretion and radiative processes in NGC 5273, and propose that the variable luminosity (and thus, Eddington ratio) of the source is changing how the broad line region (BLR) reprocesses the continuum emission.
19 pages, 13 figures, 5 tables, accepted to MNRAS
References in corpus (112)
- The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
- The Swift X-ray Telescope
- The Galaxy Evolution Explorer: A Space Ultraviolet Survey Mission
- The Swift Ultra-Violet/Optical Telescope
- The Man Behind the Curtain: X-rays Drive the UV through NIR Variability in the 2013 AGN Outburst in NGC 2617
- Hot Accretion Flows Around Black Holes
- The Sixteenth Data Release of the Sloan Digital Sky Surveys: First Release from the APOGEE-2 Southern Survey and Full Release of eBOSS Spectra
- The SBF Survey of Galaxy Distances. IV. SBF Magnitudes, Colors, and Distances
- Nuclear Activity in Nearby Galaxies
- The All-Sky Automated Survey for Supernovae (ASAS-SN) Light Curve Server v1.0
- Photometric Calibration of the Swift Ultraviolet/Optical Telescope
- Preliminary Results from NEOWISE: An Enhancement to the Wide-field Infrared Survey Explorer for Solar System Science
- Mid-Infrared Selection of AGN with the Wide-Field Infrared Survey Explorer. I. Characterizing WISE-Selected AGN in COSMOS
- Initial Performance of the NEOWISE Reactivation Mission
- The XMM-Newton Optical/UV Monitor Telescope
- An XMM-Newton survey of broad iron lines in Seyfert galaxies
- BAT AGN Spectroscopic Survey - V. X-ray properties of the Swift/BAT 70-month AGN catalog
- Monte-Carlo Simulator and Ancillary Response Generator of Suzaku XRT/XIS System for Spatially Extended Source Analysis
- Is the soft excess in AGN real?
- A Search for "Dwarf" Seyfert Nuclei. IV. Nuclei with Broad H-alpha Emission
- Tidal Disruption Events
- Mid-Infrared Selection of Active Galactic Nuclei with the Wide-Field Infrared Survey Explorer. II. Properties of WISE-Selected Active Galactic Nuclei in the NDWFS Boötes Field
- The Discovery of the First "Changing Look" Quasar: New Insights into the Physics & Phenomenology of AGN
- Irradiation of an Accretion Disc by a Jet: General Properties and Implications for Spin Measurements of Black Holes
- Our Peculiar Motion Away from the Local Void
- The XMM-Newton serendipitous survey IX. The fourth XMM-Newton serendipitous source catalogue
- Simultaneous X-ray/optical/UV snapshots of active galactic nuclei from XMM-Newton: spectral energy distributions for the reverberation mapped sample
- The On-Orbit Performance of the Galaxy Evolution Explorer
- Universal bolometric corrections for AGN over 7 luminosity decades
- Broad emission lines for negatively spinning black holes
- A Systematic Search for Changing-Look Quasars in SDSS
- CAIXA: a Catalogue of AGN In the XMM-Newton Archive I. Spectral analysis
- Changing look: from Compton-thick to Compton-thin, or the re-birth of fossil AGN
- Paper II: Calibration of the Swift ultraviolet/optical telescope
- Broad Emission Line Regions in AGN: the Link with the Accretion Power
- An Empirical Background Model for the NICER X-ray Timing Instrument
- On the Disappearance of the Broad-Line Region in Low-Luminosity Agns
- Analysis of optical Fe II emission in a sample of AGN spectra
- A 0.8-2.4 microns spectral atlas of Active Galactic Nuclei
- Broad-line Balmer Decrements in Blue Active Galactic Nuclei
- PS16dtm: A Tidal Disruption Event in a Narrow-line Seyfert 1 Galaxy
- 1ES 1927+654: An AGN Caught Changing Look on a Timescale of Months
- Testing warm Comptonization models for the origin of the soft X-ray excess in AGN
- Hidden Broad Line Seyfert 2 Galaxies in the CfA and 12micron Samples
- The Radiative Efficiency of Hot Accretion Flows
- Unabsorbed Seyfert 2 galaxies
- On why the Iron K-shell absorption in AGN is not a signature of the local Warm/Hot Intergalactic Medium
- Evolution of Broad-line Emission from Active Galactic Nuclei
- A tidal disruption flare in a massive galaxy? Implications for the fuelling mechanisms of nuclear black holes
- Changing-Look Quasar Candidates: First Results from Follow-up Spectroscopy of Highly Optically Variable Quasars
- The destruction and recreation of the X-ray corona in a changing-look Active Galactic Nucleus
- A global view of the inner accretion and ejection flow around super massive black holes: radiation driven accretion disk winds in a physical context
- Towards an Understanding of Changing-Look Quasars: An Archival Spectroscopic Search in SDSS
- X-ray Absorption and Reflection in Active Galactic Nuclei
- iPTF Discovery of the Rapid "Turn On" of a Luminous Quasar
- The Frequency of Polarized Broad Emission Lines in Type 2 Seyfert Galaxies
- A possible mechanism for multiple changing look phenomenon in Active Galactic Nuclei
- The Near-Infrared Broad Emission Line Region of Active Galactic Nuclei -- I. The Observations
- The Lack of BLR in Low Accretion Rate AGN as Evidence of their Origin in the Accretion Disk
- Rapid N_H changes in NGC 4151
- The XMM-Newton serendipitous ultraviolet source survey catalogue
- The Analogous Structure of Accretion Flows in Supermassive and Stellar Mass Black Holes: New Insights from Faded Changing-Look Quasars
- Understanding extreme quasar optical variability with CRTS: II. Changing-state quasars
- How complex is the obscuration in AGN? New clues from the Suzaku monitoring of the X-ray absorbers in NGC7582
- A New Class of Changing-Look LINERs
- Radiation spectra of warm and optically thick coronae in AGN
- BAT AGN Spectroscopic Survey - IV: Near-Infrared Coronal Lines, Hidden Broad Lines, and Correlation with Hard X-ray Emission
- The Soft-Excess in Mrk 509: Warm Corona or Relativistic Reflection?
- New changing look case in NGC 1566
- Evidence for periodicity in 43 year-long monitoring of NGC 5548
- The accretion ratios in Seyfert 2 galaxies with and without hidden broad-line regions
- Long-term variability of the optical spectra of NGC 4151: I. Light curves and flux correlations
- The Curious Case of ASASSN-20hx: A Slowly-Evolving, UV and X-ray Luminous, Ambiguous Nuclear Transient
- gPhoton: The GALEX Photon Data Archive
- To TDE or not to TDE: The luminous transient ASASSN-18jd with TDE-like and AGN-like qualities
- Indecent Exposure in Seyfert 2 Galaxies: A Close Look
- A Multi-Wavelength Study of the Nature of Type 1.8/1.9 Seyfert Galaxies
- The 450 days X-ray monitoring of the changing-look AGN 1ES 1927+654
- Initial results from a systematic search for changing-look active galactic nuclei selected via mid-infrared variability
- Simultaneous X-ray and optical observations of true Type 2 Seyfert galaxies
- The Mass of the Central Black Hole in the Nearby Seyfert Galaxy NGC5273
- Rapid "Turn-on" of type 1 AGN in a quiescent early type galaxy SDSS1115+0544
- NGC454: unveiling a new "changing look" AGN
- Disk Outflows and High-Luminosity True Type 2 AGN
- Long-Term Variability in the Optical Spectrum of the Seyfert Galaxy NGC 2992
- Power density spectrum of NGC 5548 and the nature of its variability
- The Spectroscopic Classification of Astronomical Transients (SCAT) Survey: Overview, Pipeline Description, Initial Results, and Future Plans
- A Transient "Changing-look'' Active Galactic Nucleus Resolved on Month Timescales from First-year Sloan Digital Sky Survey V Data
- The first high-redshift changing-look quasars
- Study of Swift/BAT Selected Low-luminosity Active Galactic Nuclei Observed with Suzaku
- Variability of accretion flow in the core of the Seyfert galaxy NGC 4151
- Space Telescope and Optical Reverberation Mapping Project. VII. Understanding the UV anomaly in NGC 5548 with X-Ray Spectroscopy
- Oscillatory patterns in the light curves of 5 long-term monitored type 1 AGN
- The Eddington ratio-dependent changing look events in NGC 2992
- Extending Virial Black Hole Mass Estimates to Low-Luminosity or Obscured AGN: the cases of NGC 4395 and MCG -01-24-012
- WISE view of changing-look AGNs: evidence for a transitional stage of AGNs
- The "red shelf" of the Hb line in the Seyfert 1 galaxies RXS J01177+3637 and HS 0328+05
- Fundamental X-ray Corona Parameters of Swift/BAT AGN
- Broadband X-Ray Observations of the 2018 Outburst of the Changing-Look Active Galactic Nucleus NGC 1566
- An Infrared and Optical Analysis of a Sample of XBONGs and Optically Elusive AGN
- Detection of faint broad emission lines in type 2 AGN: I. Near infrared observations and spectral fitting
- Investigating the Nature of the Luminous Ambiguous Nuclear Transient ASASSN-17jz
- The intrinsic Baldwin effect in broad Balmer lines of six long-term monitored AGNs
- NuSTAR Observations of Intrinsically X-ray Weak Quasar Candidates: An Obscuration-Only Scenario
- The X-ray variability and the near-IR to X-ray spectral energy distribution of four low luminosity Seyfert 1 galaxies
- Detection of the high energy cut-off from the Seyfert 1.5 galaxy NGC 5273
- Optical Monitoring of the Seyfert Galaxy NGC 4151 and Possible Periodicities in the Historical Light Curve
- X-ray reverberation lags from the 1.5 Seyfert galaxy NGC 5273
- TESS Shines Light on the Origin of the Ambiguous Nuclear Transient ASASSN-18el
- Repeating Ultraluminous X-ray Bursts and Repeating Fast Radio Bursts: A Possible Association?
- An X-ray View of the Ambiguous Nuclear Transient AT2019pev
- A radio, optical, UV and X-ray view of the enigmatic changing look Active Galactic Nucleus 1ES~1927+654 from its pre- to post-flare states
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- Investigating Changing-Look Active Galactic Nuclei with Long-term Optical and X-Ray Observations
- Discovery and Follow-up of ASASSN-23bd (AT 2023clx): The Lowest Redshift and Least Luminous Tidal Disruption Event To Date
- AT 2018dyk: tidal disruption event or active galactic nucleus? Follow-up observations of an extreme coronal line emitter with the Dark Energy Spectroscopic Instrument
- Zooming into the neutrino-associated blazar candidate J1718+4239
- Identifying Changing-Look AGN Transitions in Light Curve Data with the Zwicky Transient Facility