2.5k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- California Institute of TechnologyUS317 papers
- Centre National de la Recherche ScientifiqueFR299 papers
- Pontificia Universidad Católica de ChileCL286 papers
- Millennium Institute of AstrophysicsCL233 papers
- Goddard Space Flight CenterUS227 papers
- Jet Propulsion LaboratoryUS225 papers
- Center for Astrophysics Harvard & SmithsonianUS207 papers
- University of ArizonaUS206 papers
- Space Telescope Science InstituteUS170 papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR169 papers
- Pennsylvania State UniversityUS163 papers
- University of California, BerkeleyUS162 papers
18 papers · 2 filters
Multiband variability studies and novel broadband SED modeling of Mrk 501 in 2009
M. L. Ahnen, S. Ansoldi, L. A. Antonelli +290
We present an extensive study of the BL Lac object Mrk 501 based on a data set collected during the multi-instrument campaign spanning from 2009 March 15 to 2009 August 1 which inc…
The NuSTAR Serendipitous Survey: The 40 month Catalog and the Properties of the Distant High Energy X-ray Source Population
G. B. Lansbury, D. Stern, J. Aird +35
We present the first full catalog and science results for the NuSTAR serendipitous survey. The catalog incorporates data taken during the first 40 months of NuSTAR operation, which…
Galaxy gas as obscurer: II. Separating the galaxy-scale and nuclear obscurers of Active Galactic Nuclei
Johannes Buchner, Franz E. Bauer
The "torus" obscurer of Active Galactic Nuclei (AGN) is poorly understood in terms of its density, substructure and physical mechanisms. Large X-ray surveys provide model boundary…
Galaxy gas as obscurer: I. GRBs x-ray galaxies and find a N_H ~ M* relation
Johannes Buchner, Steve Schulze, Franz E. Bauer
An important constraint for galaxy evolution models is how much gas resides in galaxies, in particular at the peak of star formation z=1-3. We attempt a novel approach by letting l…
NuSTAR observations of WISE J1036+0449, a Galaxy at z obscured by hot dust
C. Ricci, R. J. Assef, D. Stern +34
Hot, Dust-Obscured Galaxies (Hot DOGs), selected from the WISE all sky infrared survey, host some of the most powerful Active Galactic Nuclei (AGN) known, and might represent an im…
The Phoenix galaxy as seen by NuSTAR
A. Masini, A. Comastri, S. Puccetti +18
Aims. We study the long-term variability of the well-known Seyfert 2 galaxy Mrk 1210 (a.k.a. UGC 4203, or the Phoenix galaxy). Methods. The source was observed by many X-ray facili…
Long-Term X-ray Variability of Typical Active Galactic Nuclei in the Distant Universe
G. Yang, W. Brandt, B. Luo +13
We perform long-term ( yr, observed-frame) X-ray variability analyses of the 68 brightest radio-quiet active galactic nuclei (AGNs) in the 6 Ms Deep Field-Sou…
X-Ray and Radio Emission from the Luminous Supernova 2005kd
Vikram V. Dwarkadas, C. Romero-Cañizales, R. Reddy +1
SN 2005kd is among the most luminous supernovae (SNe) to be discovered at X-ray wavelengths. We have re-analysed all good angular resolution (better than FWHM PSF) archival X…
SN 2015bh: NGC 2770's 4th supernova or a luminous blue variable on its way to a Wolf-Rayet star?
C. C. Thöne, A. de Ugarte Postigo, G. Leloudas +13
Very massive stars in the final phases of their lives often show unpredictable outbursts that can mimic supernovae, so-called, "SN impostors", but the distinction is not always str…
NuSTAR Hard X-ray Survey of the Galactic Center Region II: X-ray Point Sources
JaeSub Hong, Kaya Mori, Charles J. Hailey +41
We present the first survey results of hard X-ray point sources in the Galactic Center (GC) region by NuSTAR. We have discovered 70 hard (3-79 keV) X-ray point sources in a 0.6 deg…
The nature of the torus in the heavily obscured AGN Markarian 3: an X-ray study
M. Guainazzi, G. Risaliti, H. Awaki +22
In this paper we report the results of an X-ray monitoring campaign on the heavily obscured Seyfert galaxy Markarian 3 carried out between the fall of 2014 and the spring of 2015 w…
The weak neutral Fe fluorescence line and long-term X-ray evolution of the Compton-thick AGN in NGC 7674
P. Gandhi, A. Annuar, G. B. Lansbury +26
We present X-ray observations of the active galactic nucleus (AGN) in NGC 7674. The source shows a flat X-ray spectrum, suggesting that it is obscured by Compton-thick gas…
A New Population of Compton-Thick AGN Identified Using the Spectral Curvature Above 10 keV
Michael J. Koss, R. Assef, M. Balokovic +18
We present a new metric that uses the spectral curvature (SC) above 10 keV to identify Compton-thick AGN in low-quality Swift BAT X-ray data. Using NuSTAR, we observe nine high SC-…
NuSTAR reveals the extreme properties of the super-Eddington accreting SMBH in PG 1247+267
G. Lanzuisi, M. Perna, A. Comastri +26
PG1247+267 is one of the most luminous known quasars at and is a strongly super-Eddington accreting SMBH candidate. We obtained NuSTAR data of this intriguing source in De…
Interacting supernovae and supernova impostors. LSQ13zm: an outburst heralds the death of a massive star
L. Tartaglia, A. Pastorello, M. Sullivan +37
We report photometric and spectroscopic observations of the optical transient LSQ13zm. Historical data reveal the presence of an eruptive episode (that we label as `2013a') followe…
NuSTAR observations of water megamaser AGN
A. Masini, A. Comastri, M. Baloković +18
Aims. Study the connection between the masing disk and obscuring torus in Seyfert 2 galaxies. Methods. We present a uniform X-ray spectral analysis of the high energy properties of…
A "high-hard" outburst of the black hole X-ray binary GS 1354-64
K. I. I. Koljonen, D. M. Russell, J. M. Corral-Santana +5
We study in detail the evolution of the 2015 outburst of GS 1354-64 (BW Cir) at optical, UV and X-ray wavelengths using Faulkes Telescope South/LCOGT, SMARTS and Swift. The outburs…
IC 751: a new changing-look AGN discovered by NuSTAR
C. Ricci, F. E. Bauer, P. Arevalo +12
We present the results of five NuSTAR observations of the type 2 active galactic nucleus (AGN) in IC 751, three of which were performed simultaneously with XMM-Newton or Swift/XRT.…