Search Results - "Grupe, D"

X-ray spectra reveal the reawakening of the repeat changing-look AGN NGC 1566 by Parker, M L, Schartel, N, Grupe, D, Komossa, S, Harrison, F, Kollatschny, W, Mikula, R, Santos-Lleó, M, Tomás, L

“…Abstract We present simultaneous XMM–Newton and NuSTAR observations of the repeat changing-look AGN NGC 1566, which dramatically increased in brightness in the…”
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First deep X-ray observations of the Fermi-detected steep-spectrum source and radio-loud NLS1 galaxy 3C 286 by Yao, Su, Komossa, S, Kraus, A, Grupe, D

“…ABSTRACT A well-known calibrator source in radio astronomy, 3C 286 ($z=0.85$), is a compact steep-spectrum (CSS) radio source and spectroscopically classified…”
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Six months of multiwavelength follow-up of the tidal disruption candidate ASASSN-14li and implied TDE rates from ASAS-SN by Holoien, T W-S, Kochanek, C S, Prieto, J L, Stanek, K Z, Dong, Subo, Shappee, B J, Grupe, D, Brown, J S, Basu, U, Beacom, J F, Bersier, D, Brimacombe, J, Danilet, A B, Falco, E, Guo, Z, Jose, J, Herczeg, G J, Long, F, Pojmanski, G, Simonian, G V, Szczygiel, D M, Thompson, T A, Thorstensen, J R, Wagner, R M, Wozniak, P R

“…We present ground-based and Swift photometric and spectroscopic observations of the candidate tidal disruption event (TDE) ASASSN-14li, found at the centre of…”
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Extreme accretion events: TDEs and changing‐look AGN by Komossa, S., Grupe, D.

“…We present a review of the topics of X‐ray stellar tidal disruption events (TDEs) and changing‐look active galactic nuclei (AGN). Stars approaching a…”
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Eleven years of monitoring the Seyfert 1 Mrk 335 with Swift: Characterizing the X-ray and UV/optical variability by Gallo, L C, Blue, D M, Grupe, D, Komossa, S, Wilkins, D R

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The 2020 April–June super-outburst of OJ 287 and its long-term multiwavelength light curve with Swift: binary supermassive black hole and jet activity by Komossa, S, Grupe, D, Parker, M L, Valtonen, M J, Gómez, J L, Gopakumar, A, Dey, L

“…ABSTRACT We report detection of a very bright X-ray–UV–optical outburst of OJ 287 in 2020 April–June, the second brightest since the beginning of our Swift…”
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X-ray spectral components of the blazar and binary black hole candidate OJ 287 (2005–2020) by Komossa, S, Grupe, D, Parker, M L, Gómez, J L, Valtonen, M J, Nowak, M A, Jorstad, S G, Haggard, D, Chandra, S, Ciprini, S, Dey, L, Gopakumar, A, Hada, K, Markoff, S, Neilsen, J

“…ABSTRACT We present a comprehensive analysis of all XMM–Newton spectra of OJ 287 spanning 15 yr of X-ray spectroscopy of this bright blazar. We also report the…”
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MOMO. IV. The Complete Swift X-Ray and UV/Optical Light Curve and Characteristic Variability of the Blazar OJ 287 during the Last Two Decades by Komossa, S., Grupe, D., Gallo, L. C., Gonzalez, A., Yao, S., Hollett, A. R., Parker, M. L., Ciprini, S.

“…Abstract We have been carrying out a dense monitoring of the blazar OJ 287 with Swift since late 2015 as part of our project MOMO (Multiwavelength Observations…”
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The nuclear environment of the NLS1 Mrk 335: Obscuration of the X-ray line emission by a variable outflow by Parker, M L, Longinotti, A L, Schartel, N, Grupe, D, Komossa, S, Kriss, G, Fabian, A C, Gallo, L, Harrison, F A, Jiang, J, Kara, E, Krongold, Y, Matzeu, G A, Pinto, C, Santos-Lleó, M

“…ABSTRACT We present XMM–Newton, NuSTAR, Swift, and Hubble Space Telescope observations of the Narrow-line Seyfert 1 galaxy Mrk 335 in a protracted low state in…”
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The NuSTAR spectrum of Mrk 335: extreme relativistic effects within two gravitational radii of the event horizon? by Parker, M. L., Wilkins, D. R., Fabian, A. C., Grupe, D., Dauser, T., Matt, G., Harrison, F. A., Brenneman, L., Boggs, S. E., Christensen, F. E., Craig, W. W., Gallo, L. C., Hailey, C. J., Kara, E., Komossa, S., Marinucci, A., Miller, J. M., Risaliti, G., Stern, D., Walton, D. J., Zhang, W. W.

“…We present 3–50 keV NuSTAR observations of the active galactic nuclei Mrk 335 in a very low flux state. The spectrum is dominated by very strong features at…”
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A Hot Mess: The Rich and Complex Soft Emitting Regions Surrounding the Reflection Dominated Flaring Central Engine of Mrk 1239 by Buhariwalla, M. Z., Gallo, L. C., Mao, J., Jiang, J., Pothier-Bogoslowski, L. K., Järvelä, E., Komossa, S., Grupe, D.

“…Abstract Previous X-ray works on Mrk 1239 have revealed a complex narrow-line Seyfert 1 that exhibits substantial absorption and strong emission from both…”
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Flaring from the supermassive black hole in Mrk 335 studied with Swift and NuSTAR by Wilkins, D. R., Gallo, L. C., Grupe, D., Bonson, K., Komossa, S., Fabian, A. C.

“…Monitoring of the narrow line Seyfert 1 galaxy Markarian 335 (Mrk 335) with the Swift satellite discovered an X-ray flare beginning 2014 August 29. At the…”
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ASASSN-14ae: a tidal disruption event at 200 Mpc by Holoien, T. W.-S., Prieto, J. L., Bersier, D., Kochanek, C. S., Stanek, K. Z., Shappee, B. J., Grupe, D., Basu, U., Beacom, J. F., Brimacombe, J., Brown, J. S., Davis, A. B., Jencson, J., Pojmanski, G., Szczygieł, D. M.

“…ASASSN-14ae is a candidate tidal disruption event (TDE) found at the centre of SDSS J110840.11+340552.2 (d ≃ 200 Mpc) by the All-Sky Automated Survey for…”
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Suzaku observations of Mrk 335: confronting partial covering and relativistic reflection by Gallo, L. C., Wilkins, D. R., Bonson, K., Chiang, C.-Y., Grupe, D., Parker, M. L., Zoghbi, A., Fabian, A. C., Komossa, S., Longinotti, A. L.

“…We report on the deepest X-ray observation of the narrow-line Seyfert 1 galaxy Mrk 335 in the low-flux state obtained with Suzaku. The data are compared to a…”
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The First Swift Intensive AGN Accretion Disk Reverberation Mapping Survey by Edelson, R., Gelbord, J., Cackett, E., Peterson, B. M., Horne, K., Barth, A. J., Starkey, D. A., Bentz, M., Brandt, W. N., Goad, M., Joner, M., Korista, K., Netzer, H., Page, K., Uttley, P., Vaughan, S., Breeveld, A., Cenko, S. B., Done, C., Evans, P., Fausnaugh, M., Ferland, G., Gonzalez-Buitrago, D., Gropp, J., Grupe, D., Kaastra, J., Kennea, J., Kriss, G., Mathur, S., Mehdipour, M., Mudd, D., Nousek, J., Schmidt, T., Vestergaard, M., Villforth, C.

“…Swift intensive accretion disk reverberation mapping of four AGN yielded light curves sampled ∼200-350 times in 0.3-10 keV X-ray and six UV/optical bands…”
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Astronomy. ASASSN-15lh: A highly super-luminous supernova by Dong, Subo, Shappee, B J, Prieto, J L, Jha, S W, Stanek, K Z, Holoien, T W-S, Kochanek, C S, Thompson, T A, Morrell, N, Thompson, I B, Basu, U, Beacom, J F, Bersier, D, Brimacombe, J, Brown, J S, Bufano, F, Chen, Ping, Conseil, E, Danilet, A B, Falco, E, Grupe, D, Kiyota, S, Masi, G, Nicholls, B, Olivares E, F, Pignata, G, Pojmanski, G, Simonian, G V, Szczygiel, D M, Woźniak, P R

“…We report the discovery of ASASSN-15lh (SN 2015L), which we interpret as the most luminous supernova yet found. At redshift z = 0.2326, ASASSN-15lh reached an…”
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The unexpected, long-lasting, UV rebrightening of the superluminous supernova ASASSN-15lh by Godoy-Rivera, D, Stanek, K Z, Kochanek, C S, Chen, Ping, Dong, Subo, Prieto, J L, Shappee, B J, Jha, S W, Foley, R J, Pan, Y-C, Holoien, T W-S, Thompson, Todd A, Grupe, D, Beacom, J F

“…Given its peak luminosity and early-time spectra, ASASSN-15lh was classified as the most luminous supernova ever discovered. Here, we report a UV rebrightening…”
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Absence of the predicted 2022 October outburst of OJ 287 and implications for binary SMBH scenarios by Komossa, S, Grupe, D, Kraus, A, Gurwell, M A, Haiman, Z, Liu, F K, Tchekhovskoy, A, Gallo, L C, Berton, M, Blandford, R, Gómez, J L, Gonzalez, A G

“…ABSTRACT The project MOMO (Multiwavelength Observations and Modelling of OJ 287) was set up to test predictions of binary supermassive black hole (SMBH)…”
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Flares in the changing look AGN Mrk 590 – I. The UV response to X-ray outbursts suggests a more complex reprocessing geometry than a standard disc by Lawther, D, Vestergaard, M, Raimundo, S, Koay, J Y, Peterson, B M, Fan, X, Grupe, D, Mathur, S

“…ABSTRACT Mrk 590 is a known changing-look active galactic nuclei (AGNs) which almost turned off in 2012, and then in 2017 partially re-ignited into a repeat…”
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Uncertainty during Anticipation Modulates Neural Responses to Aversion in Human Insula and Amygdala by Sarinopoulos, I., Grupe, D. W., Mackiewicz, K. L., Herrington, J. D., Lor, M., Steege, E. E., Nitschke, J. B.

“…Uncertainty about potential negative future outcomes can cause stress and is a central feature of anxiety disorders. The stress and anxiety associated with…”
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