Publications (79)
The Wide-Angle Outflow of the Lensed z = 1.51 AGN HS 0810+2554
G. Chartas, M. Cappi, F. Hamann +4
We present results from X-ray observations of the gravitationally lensed z = 1.51 AGN HS 0810+2554 performed with the Chandra X-ray Observatory and XMM-Newton. Blueshifted absorpti…
Rejection of the Binary Broad-Line Region Interpretation of Double-Peaked Emission Lines in Three Active Galactic Nuclei
M. Eracleous, J. P. Halpern, A. M. Gilbert +2
It has been suggested that the peculiar double-peaked Balmer lines of certain broad-line radio galaxies come from individual broad-line regions associated with the black holes of a…
Evolution of the accretion disk in the nucleus of NGC 1097
T. Storchi-Bergmann, R. Nemmen da Silva, M. Eracleous
We discuss the long-term evolution of the broad double-peaked H alpha profile of the LINER/Seyfert 1 nucleus of NGC 1097. Besides the previously known variation of the relative int…
PS18kh: A New Tidal Disruption Event with a Non-Axisymmetric Accretion Disk
T. W. -S. Holoien, M. E. Huber, B. J. Shappee +38
We present the discovery of PS18kh, a tidal disruption event (TDE) discovered at the center of SDSS J075654.53+341543.6 ( Mpc) by the Pan-STARRS Survey for Transients.…
X-ray and Multiwavelength Insights into the Inner Structure of High-Luminosity Disc-Like Emitters
B. Luo, W. N. Brandt, M. Eracleous +5
We present X-ray and multiwavelength studies of a sample of eight high-luminosity active galactic nuclei (AGNs) with disc-like Hβemission-line profiles selected from the Sloan Dig…
Non-stationary variability in AGN: the case of 3C 390.3
M. Gliozzi, I. E. Papadakis, R. M. Sambruna +1
We use data from a two-year intensive RXTE monitoring campaign of the broad-line radio galaxy 3C 390.3 to investigate its stationarity. In order to exploit the potential informatio…
Long-Term Profile Variability of Double Peaked Emission Lines in Active Galactic Nuclei
S. Gezari, J. P. Halpern, M. Eracleous
We present up to two decades of spectroscopic monitoring of the double-peaked broad Halpha emission lines of seven broad-line radio galaxies. These extremely broad, double-peaked l…
Space Telescope and Optical Reverberation Mapping Project. IX. Velocity-Delay Maps for Broad Emission Lines in NGC 5548
Keith Horne, G. De Rosa, B. M. Peterson +155
We report velocity-delay maps for prominent broad emission lines, Ly_alpha, CIV, HeII and H_beta, in the spectrum of NGC5548. The emission-line responses inhabit the interior of a…
Unveiling the period-bounce population of cataclysmic variables: Spectroscopic and time-domain follow-up of eROSITA-selected candidates
S. Hernández-DÃaz, B. Stelzer, A. Schwope +9
The paper presents spectroscopic and time‑domain follow‑up of eROSITA‑selected cataclysmic variable candidates, confirming 24 new systems and showing they are consistent with perio…
High Velocity Outflows in Narrow Absorption Line Quasars
G. Chartas, J. Charlton, M. Eracleous +6
The current paradigm for the AGN phenomenon is a central engine that consists of an inflow of material accreting in the form of a disk onto a supermassive black hole. Observations…
The Narrow-Line Regions of LINERs as Resolved with the Hubble Space Telescope
R. W. Pogge, D. Maoz, L. C. Ho +1
LINERs exist in the nuclei of a large fraction of luminous galaxies, but their connection with the AGN phenomenon has remained elusive. We present Hubble Space Telescope narrowband…
The Spectral Energy Distributions of AGN with Double-Peaked Balmer Lines
I. Strateva, W. N. Brandt, M. Eracleous +2
We summarize the optical, UV, and X-ray properties of double-peaked emitters -- AGN with double-peaked Balmer emission lines believed to originate in the AGN accretion disk. We foc…
GRB 021004: a Massive Progenitor Star Surrounded by Shells
Bradley E. Schaefer, C. L. Gerardy, P. Hoflich +13
We present spectra of the optical transient of GRB021004 obtained with the Hobby-Eberly telescope starting 15.48, 20.31 hours, and 4.84 days after the burst and a spectrum obtained…
Long-Term, Continuous Monitoring of the Broad Line Radio Galaxies 3C 390.3 and 3C 120 With the Rossi X-Ray Timing Explorer
M. Gliozzi, R. M. Sambruna, M. Eracleous
We present a study of the flux and spectral variability of the two broad-line radio galaxies (BLRGs) 3C 390.3 and 3C 120, observed almost daily with RXTE for nearly two months each…
Chandra detection of a parsec scale wind in the Broad Line Radio Galaxy 3C 382
J. N. Reeves, R. M. Sambruna, V. Braito +1
We present unambiguous evidence for a parsec scale wind in the Broad-Line Radio Galaxy (BLRG) 3C 382, the first radio-loud AGN, with $R_{\rm L} = \log_{10}(f_{\rm 5GHz}/f_{4400})>1…
PSR J2229+6114: Discovery of an Energetic Young Pulsar in the Error Box of the EGRET Source 3EG J2227+6122
J. P. Halpern, F. Camilo, E. V. Gotthelf +5
We report the detection of radio and X-ray pulsations at a period of 51.6 ms from the X-ray source RX/AX J2229.0+6114 in the error box of the EGRET source 3EG J2227+6122. An epheme…
Space Telescope and Optical Reverberation Mapping Project. VIII. Time Variability of Emission and Absorption in NGC 5548 Based on Modeling the Ultraviolet Spectrum
G. A. Kriss, G. De Rosa, J. Ely +164
We model the ultraviolet spectra of the Seyfert 1 galaxy NGC~5548 obtained with the Hubble Space Telescope during the 6-month reverberation-mapping campaign in 2014. Our model of t…
The ASCA X-Ray Spectrum of Arp 102B and Evaluation of Simple Models for Its Associated, Metastable Fe II Absorber
M. Eracleous, J. P. Halpern, J. C. Charlton
We have observed the broad-line radio galaxy Arp 102B with ASCA in order to determine the absorbing column density towards its X-ray source and measure its X-ray spectrum. The ulti…
ReveaLLAGN 0: First Look at JWST MIRI data of Sombrero and NGC 1052
K. Goold, A. Seth, M. Molina +28
We present the first results from the Revealing Low-Luminosity Active Galactic Nuclei (ReveaLLAGN) survey, a JWST survey of seven nearby LLAGN. We focus on two observations with th…
Variable X-ray Absorption in mini-BAL QSOs
M. Giustini, M. Cappi, G. Chartas +3
We present the results of X-ray spectral analysis of two mini-BAL QSOs, PG 1126-041 and PG 1351+640, aimed at getting insights into the physics of quasar outflows. We find strong X…
XRISM/Resolve reveals the complex iron structure of NGC 7213: Evidence for radial stratification between inner disk and broad-line region
E. Kammoun, T. Kawamuro, K. Murakami +48
We present the first high-resolution X-ray spectrum of NGC 7213 obtained with XRISM/Resolve, supported by simultaneous XMM-Newton, NuSTAR, and SOAR optical data. The XRISM spectrum…
The XMM-Newton View of the Nucleus of NGC 4261
R. M. Sambruna, M. Gliozzi, M. Eracleous +2
We present the first results from an XMM-Newton observation of the FRI galaxy NGC 4261, which harbors a supermassive black hole and a low-ionization nuclear emission-line region (L…
The Ultraviolet Spectra of Active Galaxies With Double-Peaked Emission Lines
M. Eracleous, J. P. Halpern, T. Storchi-Bergmann +3
We present the results of UV spectroscopy of AGNs with double-peaked Balmer emission lines. In 2/3 of the objects, the far-UV resonance lines are strong, with single-peaked profile…
Optical Identification of the Hardest X-ray Source in the ASCA Large Sky Survey
M. Akiyama, K. Ohta, T. Yamada +9
We report the optical identification of the hardest X-ray source (AX J131501+3141) detected in an unbiased wide-area survey in the 0.5--10 keV band, the ASCA Large Sky Survey. The…
Search for a Point-Source Counterpart of the Unidentified Gamma-Ray Source TeV J2032+4130 in Cygnus
R. Mukherjee, J. P. Halpern, E. V. Gotthelf +2
We have made a multiwavelength study of the overlapping error boxes of the unidentified gamma-ray sources TeV J2032+4130 and 3EG J2033+4118 in the direction of the Cygnus OB2 assoc…
A Spectropolarimetric Test of the Structure of the Intrinsic Absorbers in the Quasar HS1603+3820
T. Misawa, K. S. Kawabata, M. Eracleous +2
We report the results of a spectropolarimetric observation of the C IV mini-BAL in the quasar HS1603+3820. The observations were carried out with the FOCAS instrument on the Subaru…
Completion of a Survey and Detailed Study of Double-Peaked Emission Lines in Radio-Loud AGNs
M. Eracleous, J. P. Halpern
We report the completion of a survey of radio-loud AGNs begun in an earlier paper, aimed finding and studying broad, double-peaked Balmer lines. We present Ha spectra of 13 broad-l…
Hard X-Ray Spectra of Broad-Line Radio Galaxies from the Rossi X-Ray Timing Explorer
M. Eracleous, R. M. Sambruna, R. F. Mushotzky
We present the results of hard-X-ray observations of four broad-line radio galaxies (BLRGs) with the Rossi X-Ray Timing Explorer (RXTE). The original motivation behind the observat…
Short-term variability and PSD analysis of the radio-loud AGN 3C 390.3
M. Gliozzi, I. E. Papadakis, M. Eracleous +4
We investigate the short-term variability properties and the power spectral density (PSD) of the Broad-Line Radio Galaxy (BLRG) 3C 390.3 using observations made by XMM, RXTE, and S…
A NuSTAR Census of the X-ray Binary Population of the M31 Disk
Hannah Moon, Daniel R. Wik, V. Antoniou +11
Using hard (E>10 keV) X-ray observations with NuSTAR, we are able to differentiate between accretion states, and thus compact object types, of neutron stars and black holes in X-ra…
Velocity-resolved reverberation mapping of five bright Seyfert 1 galaxies
G. De Rosa, M. M. Fausnaugh, C. J. Grier +99
We present the first results from a reverberation-mapping campaign undertaken during the first half of 2012, with additional data on one AGN (NGC 3227) from a 2014 campaign. Our ma…
Discovery of Probable Relativistic Fe Emission and Absorption in the Cloverleaf Quasar H 1413+117
G. Chartas, M. Eracleous, X. Dai +2
We present results from Chandra and XMM-Newton observations of the low-ionization broad absorption line (LoBAL) quasar H 1413+117. Our spatial and spectral analysis of a recent dee…
EUVE J0425.6-5714: A Newly Discovered AM Herculis Star
J. P. Halpern, K. M. Leighly, H. L. Marshall +2
We detected a new AM Her star serendipitously in a 25 day observation with the EUVE satellite. A coherent period of 85.82 min is present in the EUVE Deep Survey imager light curve…
The Chandra Local Volume Survey: The X-ray Point Source Population of NGC 404
B. Binder, B. F. Williams, M. Eracleous +4
We present a comprehensive X-ray point source catalog of NGC 404 obtained as part of the Chandra Local Volume Survey. A new, 97 ks Chandra ACIS-S observation of NGC 404 was combine…
An Amusing Look at the Host of the Periodic Nuclear Transient ASASSN-14ko Reveals a Second AGN
M. A. Tucker, B. J. Shappee, J. T. Hinkle +10
We present Multi-Unit Spectroscopic Explorer (MUSE) integral-field spectroscopy of ESO 253G003, which hosts a known Active Galactic Nucleus (AGN) and the periodic nuclear transi…
Extreme X-ray Behavior in the Low-Luminosity Active Nucleus of NGC 4395
E. C. Moran, M. Eracleous, K. M. Leighly +4
We present the results of a 17 ks Chandra observation of the nearby dwarf spiral galaxy NGC 4395, focusing on the X-ray properties of the moderate-mass black hole that resides in i…
The Chandra Local Volume Survey I: The X-ray Point Source Populations of NGC 55, NGC 2403, and NGC 4214
B. Binder, B. F. Williams, M. Eracleous +7
We present comprehensive X-ray point source catalogs of NGC~55, NGC~2403, and NGC~4214 as part of the Chandra Local Volume Survey. The combined archival observations have effective…
Chandra Observations of the Cloverleaf Quasar H 1413+117: A Unique Laboratory for Microlensing Studies of a Lobal Quasar
G. Chartas, M. Eracleous, E. Agol +1
We present new results uncovered by a re-analysis of a Chandra observation of the gravitationally lensed, low-ionization broad absorption line (LoBAL) quasar H 1413+117. Previous a…
Variability in LINERs
J. C. Shields, H. -W. Rix, D. H. McIntosh +6
A small number of LINERs have been seen to display variable H-alpha emission with a very broad, double-peaked profile. Recent observations with the Hubble Space Telescope indicate…
The transient X-ray source SAX J2239.3+6116 and its optical counterpart
J. J. M. in 't Zand, J. Halpern, M. Eracleous +4
We have discovered with the Wide Field Cameras on board BeppoSAX the weak transient X-ray source SAXJ2239.3+6116 whose position coincides with that of 4U2238+60/3A2237+608 and is c…
Locating Star-Forming Regions in Quasar Host Galaxies
J. E. Young, M. Eracleous, O. Shemmer +5
We present a study of the morphology and intensity of star formation in the host galaxies of eight Palomar-Green quasars using observations with the Hubble Space Telescope. Our obs…
E 0336-248 : A New BL Lac Object Found by an Old Einstein
J. P. Halpern, M. Eracleous, K. Forster
We obtained new ROSAT HRI and optical observations in the field of the Einstein X-ray source E 0336-248, which we use to identify it as a 19th magnitude BL Lacertae object at z=0.2…
Discovery of the Onset of Rapid Accretion by a Dormant Massive Black Hole
D. N. Burrows, J. A. Kennea, G. Ghisellini +53
Massive black holes are believed to reside at the centres of most galaxies. They can be- come detectable by accretion of matter, either continuously from a large gas reservoir or i…
Three LINERs Under the Chandra X-Ray Microscope
M. Eracleous, J. C. Shields, G. Chartas +1
We use X-ray observations of three galaxies hosting LINERs (NGC 404, NGC 4736, NGC 4579) with Chandra to study their power sources. We find very diverse properties within this smal…
A Cautionary Tale of Attenuation in Star Forming Regions
M. Molina, N. Ajgaonkar, R. Yan +5
The attenuation of light in star forming galaxies is correlated with a multitude of physical parameters including star formation rate, metallicity and total dust content. This vari…
Evolution of the accretion disk around the supermassive black hole of NGC 7213
J. S. Schimoia, T. Storchi-Bergmann, C. Winge +2
We present observations of the double-peaked broad H profile emitted by the active nucleus of NGC 7213 using the the Gemini South Telescope in 13 epochs between 2011 September…
A deep look at the inner regions of the mini-BAL QSO PG 1126-041 with XMM-Newton
M. Giustini, M. Cappi, G. Chartas +3
A long XMM-Newton observation of the mini-BAL QSO PG 1126-041 allowed us to detect a highly ionized phase of X-ray absorbing gas outflowing at v~15000 km/s. Physical implications a…
Observing white dwarfs orbiting massive black holes in the gravitational wave and electro-magnetic window
A. Sesana, A. Vecchio, M. Eracleous +1
We consider a potentially new class of gravitational wave sources consisting of a white dwarf coalescing into a massive black hole in the mass range ~10^4-10^5\msun. These sources…
3EG J2016+3657: Confirming an EGRET Blazar Behind the Galactic Plane
J. P. Halpern, M. Eracleous, R. Mukherjee +1
We recently identified the blazar-like radio source G74.87+1.22 (B2013+370) as the counterpart of the high-energy gamma-ray source 3EG J2016+3657 in the Galactic plane. However, si…
Chandra uncovers a hidden Low-Luminosity AGN in the radio galaxy Hydra~A (3C~218)
R. M. Sambruna, G. Chartas, M. Eracleous +2
We report the detection with Chandra of a Low-Luminosity AGN (LLAGN) in the Low Ionization Emission Line Region (LINER) hosted by Hydra A, a nearby (z=0.0537) powerful FRI radio ga…
Evidence for a Starburst within 9 pc of the Active Nucleus of NGC 1097
T. Storchi-Bergmann, R. S. Nemmen, P. F. Spinelli +4
We report evidence for a recent burst of star formation located within 9 pc of the active nucleus of NGC 1097. The observational signatures of the starburst include UV absorption l…
Coordinated X-ray and UV absorption within the accretion disk wind of the active galactic nucleus PG 1126-041
M. Giustini, P. RodrÃguez Hidalgo, J. N. Reeves +14
Accretion disk winds launched close to supermassive black holes (SMBHs) are a viable mechanism to provide feedback between the SMBH and the host galaxy. We aim to characterize the…
A View of Point Sources in Hickson Compact Groups: High AGN fraction but a dearth of strong AGNs
P. Tzanavaris, S. C. Gallagher, A. E. Hornschemeier +6
We present X-ray point source catalogs for 9 Hickson Compact Groups (HCGs, 37 galaxies) at distances Mpc. We perform detailed X-ray point source detection and p…
Simulating the Early Evolution of the Hard X-Ray Properties of a Young Stellar Population
M. S. Sipior, M. Eracleous, S. Sigurdsson
We present an X-ray binary population synthesis model, and use it to simulate the evolution of X-ray binaries formed in a burst of star formation of duration 20 Myr and star-format…
Search for the Identification of 3EG J1835+5918: Evidence for a New Type of High-Energy Gamma-ray Source
N. Mirabal, J. P. Halpern, M. Eracleous +1
The EGRET source 3EG J1835+5918 is the brightest and most accurately positioned of the as-yet unidentified high-energy gamma-ray sources at high Galactic latitude (l,b=89,25). We p…
SRG/eROSITA X-ray selected cataclysmic variable candidates observed in SDSS-V DR20
J. Brink, A. D. Schwope, K. G. Pradeep +35
The paper presents spectroscopic observations from SDSS‑V of cataclysmic variable candidates identified via X‑ray detections in the SRG/eROSITA eRASS1 and eRASS3 surveys, assemblin…
Space Telescope and Optical Reverberation Mapping Project. VII. Understanding the UV anomaly in NGC 5548 with X-Ray Spectroscopy
S. Mathur, A. Gupta, K. Page +147
During the Space Telescope and Optical Reverberation Mapping Project (STORM) observations of NGC 5548, the continuum and emission-line variability became de-correlated during the s…
The merger history, AGN and dwarf galaxies of Hickson Compact Group 59
I. S. Konstantopoulos, S. C. Gallagher, K. Fedotov +16
Compact group galaxies often appear unaffected by their unusually dense environment. Closer examination can, however, reveal the subtle, cumulative effects of multiple galaxy inter…
Evolution of the Nuclear Accretion Disk Emission in NGC 1097: Getting Closer to the Black Hole
T. Storchi-Bergmann, R. Nemmen, M. Eracleous +5
We study the evolution of the broad, double-peaked Halpha emission-line profile of the LINER/Seyfert 1 nucleus of NGC 1097, using 24 spectra obtained over a time span of 11 yrs - f…
The New Swift/UVOT+MaNGA (SwiM) Value-added Catalog
M. Molina, L. Duffy, M. Eracleous +6
We present the the new Swift/UVOT+MaNGA (SwiM) catalog (SwiM_v4.1). SwiM_v4.1 is designed to study star-formation and dust attenuation within nearby galaxies given the unique overl…
The Central Engines of 19 LINERs as Viewed by Chandra
H. M. L. G. Flohic, M. Eracleous, G. Chartas +2
Using archival Chandra observations of 19 LINERs we explore the X-ray properties of their inner kiloparsec to determine the origin of their nuclear X-ray emission, to investigate t…
The Shocking Power Sources of LINERs
M. Molina, M. Eracleous, A. J. Barth +5
The majority of low-ionization nuclear emission-line regions (LINERs) harbor supermassive black holes with very low accretion rates. However, the accretion flows do not produce eno…
Variability of Narrow, Associated Absorption Lines in Moderate- and Low-Redshift Quasars
J. H. Wise, M. Eracleous, J. C. Charlton +1
We present the results of a search for variability in the equivalent widths (EWs) of narrow, associated (Delta v < 5,000 km/s) absorption lines found in the UV spectra of z < 1.5 q…
A Census of Intrinsic Narrow Absorption Lines in the Spectra of Quasars at z=2-4
T. Misawa, J. C. Charlton, M. Eracleous +5
We use Keck/HIRES spectra of 37 optically bright quasars at z=2-4 to study narrow absorption lines that are intrinsic to the quasars (intrinsic NALs, produced in gas that is physic…
The XMM-Newton view of NGC 6251
M. Gliozzi, R. M. Sambruna, W. N. Brandt +2
We report on the nuclear X-ray properties of the radio galaxy NGC 6251 observed with XMM-Newton. NGC 6251 is a well-known radio galaxy with intermediate FRI/II radio properties. It…
An X-ray Spectral Survey of Radio-Loud AGN With ASCA
R. M. Sambruna, M. Eracleous, R. F. Mushotzky
We present a uniform and systematic analysis of the 0.6-10 keV X-ray spectra of radio-loud active galactic nuclei (AGN) observed by ASCA. The sample 10 BLRGs, 5 QSRs, 9 NLRGs, and…
The X-ray Properties of Active Galactic Nuclei with Double-Peaked Balmer Lines
I. V. Strateva, W. N. Brandt, M. Eracleous +2
Double-peaked Balmer-line profiles originate in the accretion disks of a few percent of optically selected AGN. The reasons behind the strong low-ionization line emission from the…
Radio spectra of intermediate-luminosity broad-line radio galaxies
E. Angelakis, M. Kadler, K. Lewis +3
Within the context of investigating possible differences between the mechanisms at play in Radio Loud AGN and those in Radio Quiet ones, we study the spectral characteristics of a…
GRB 991216 Joins the Jet Set: Discovery and Monitoring of its Optical Afterglow
J. P. Halpern, R. Uglesich, N. Mirabal +8
The optical light curve of the energetic gamma-ray burst GRB 991216 is consistent with jet-like behavior in which a power-law decay steepens from t**(-1.22 +/- 0.04) at early times…
A Chandra view of NGC 3621: a bulgeless galaxy hosting an AGN in its early phase?
M. Gliozzi, S. Satyapal, M. Eracleous +2
We report the detection of a weak X-ray point source coincident with the nucleus of the bulgeless disk galaxy NGC 3621, recently discovered by Spitzer to display high ionization mi…
Swift/UVOT+MaNGA (SwiM) Value-added Catalog
M. Molina, N. Ajgaonkar, R. Yan +5
We introduce the Swift/UVOT+MaNGA (SwiM) value added catalog, which comprises 150 galaxies that have both SDSS/MaNGA integral field spectroscopy and archival Swift/UVOT near-UV (NU…
Caught in the Act; Chandra Observations of Microlensing of the Radio-Loud Quasar MG J0414+0534
G. Chartas, E. Agol, M. Eracleous +3
We present results from monitoring of the distant (z = 2.64), gravitationally lensed quasar MG J0414+0534 with the Chandra X-ray Observatory. An Fe Ka line at 6.49 +/- 0.09 keV (re…
Evidence For A Precessing Accretion Disk in the Nucleus of NGC 1097
T. Storchi-Bergmann, M. Eracleous, M. T. Ruiz +3
We present new spectroscopic observations of the LINER (and now Seyfert 1) nucleus of NGC 1097, and discuss the evolution of its broad, double-peaked Balmer lines. When originally…
Structure of the Accretion Flow in Broad-Line Radio Galaxies: The Case of 3C390.3
R. M. Sambruna, J. N. Reeves, V. Braito +8
We present XMM and Suzaku observations of the Broad-Line Radio Galaxy (BLRG) 3C390.3. The Fe Ka line has a width FWHM ~ 8,800 km/s, consistent within a factor two with the width of…
Magnified Views of the Ultrafast Outflow of the z = 1.51 AGN HS 0810+2554
G. Chartas, F. Hamann, M. Eracleous +5
We present results from an observation of the gravitationally lensed z=1.51 narrow absorption line AGN HS 0810+2554 performed with the Chandra X-ray Observatory. The factor of ~100…
The nature of a broad line radio galaxy: Simultaneous RXTE and Chandra HETG observations of 3C 382
M. Gliozzi, R. M. Sambruna, M. Eracleous +1
We present the results from simultaneous chandra and rxte observations of the X-ray bright Broad-Line Radio Galaxy (BLRG) 3C 382. The long (120 ks) exposure with chandra HETG allow…
The Ionizing Source of the Nucleus of NGC1097
R. S. Nemmen, T. Storchi-Bergmann, M. Eracleous +2
We present new observations in X-ray and optical/ultraviolet of the nucleus of NGC1097, known for the abrupt appearance of broad, double-peaked Balmer lines in its spectrum in 1991…
Probing Quasar Outflows with Intrinsic Narrow Absorption Lines
T. Misawa, M. Eracleous, J. C. Charlton +5
We present statistical and monitoring results of narrow absorption lines that are physically related to quasars (i.e., intrinsic NALs). We use Keck/HIRES spectra of 37 optically br…
A Spectroscopic Reconnaissance of UV-Bright Stars
M. Eracleous, R. A. Wade, M. Mateen +1
We have carried out spectroscopic observations and made preliminary classifications of 62 UV-bright stars identified by Lanning on plates taken by A. Sandage. The goal was to searc…