Niel Brandt's Recent Research Papers - Adventures in the X-ray Universe

• X-ray Lighthouses of the High-Redshift Universe. II. Further Snapshot Observations of the Most Luminous z > 4 Quasars with Chandra
• List of high-redshift (z > 4) X-ray detections

Vignali C., Brandt W.N., Schneider D.P., Kaspi S., 2005, AJ, 129, 2519

• Deep Extragalactic X-ray Surveys

Brandt W.N., Hasinger G., 2005, ARA&A, 43, 827

• X-rays from the First Massive Black Holes
• List of high-redshift (z > 4) X-ray detections
• Overheads from the talk in Garching, Germany (June 2004)

Brandt W.N., Vignali C., Lehmer B.D., Lopez L.A., Schneider D.P., Strateva I.V., 2005, in Merloni A., Nayakshin S., Sunyaev R., eds, Growing Black Holes: Accretion in a Cosmological Context. Springer-Verlag, Berlin, p. 90-101

• X-raying Active Galaxies Both Near and Far: Exploring the Environments of Supermassive Black Holes (overheads from an invited talk at the May 2004 meeting of the American Astronomical Society)

• X-ray Surveys and Wide-Field Optical/Near-Infrared Imaging with JDEM
• Overheads from the talk in Berkeley, California (May 2004)

Brandt W.N., 2004, in McKay T., Fruchter A., Linder E., eds, Wide Field Imaging from Space. New Astronomy Reviews, 49, 430

• Chandra Observations of Radio-Loud Quasars at z > 4: X-rays from the Radio Beacons of the Early Universe
• Data table mentioned in Footnote 8 with optical photometry and radio properties

Bassett L.C., Brandt W.N., Schneider D.P., Vignali C., Chartas G., Garmire G.P., 2004, AJ, 128, 523

• X-ray Survey Results on Active Galaxy Physics and Evolution
• Overheads from the talk in Santiago, Chile (December 2003)

Brandt W.N., Alexander D.M., Bauer F.E., Vignali C., 2004, in Alloin D., Johnson R., Lira P., eds, Physics of Active Galactic Nuclei at All Scales. Springer-Verlag, Berlin, in press

• X-raying Active Galaxies: Exploring the Environments of Supermassive Black Holes (overheads from a talk at the March 2004 Joint Meeting of the New England Sections of the American Association of Physics Teachers and the American Physical Society)

• Far Ultraviolet Spectroscopic Explorer Spectroscopy of Absorption and Emission Lines from the Narrow-Line Seyfert 1 Galaxy NGC 4051

Kaspi S., Brandt W.N., Collinge M.J., Elvis M., Reynolds C.S., 2004, AJ, 127, 2631

• Results from the Chandra Deep Field-North (overheads from a colloquium at Ohio State University on 2003 October 9)

• X-raying Active Galaxies Found and Missed by the Sloan Digital Sky Survey
• Overheads from the talk in Princeton, New Jersey (July 2003)

Brandt W.N., Schneider D.P., Vignali C., 2004, in Richards G.T., Hall P.B., eds, AGN Physics with the Sloan Digital Sky Survey. ASP Press, San Francisco, p. 303-312

• X-rays from the First Massive Black Holes
• List of high-redshift (z > 4) X-ray detections
• Relevant overheads from a talk in Tonantzintla, Mexico (July 2003)

Brandt W.N., Vignali C., Schneider D.P., Alexander D.M., Anderson S.F., Bauer F.E., Fan X., Garmire G.P., Kaspi S., Richards G.T., 2003, in Done C., Puchnarewicz E.M., Ward M.J., eds, New X-ray Results from Clusters of Galaxies and Black Holes. Advances in Space Research, in press

• Chandra and HST Confirmation of the Luminous and Variable X-ray Source IC 10 X-1 as a Possible Wolf-Rayet, Black-Hole Binary

Bauer F.E., Brandt W.N., 2004, ApJ, 601, L67

• Chandra and XMM-Newton Observations of the First Quasars: X-rays from the Age of Cosmic Enlightenment
• List of high-redshift (z > 4) X-ray detections
• Table A1 in machine-readable format

Vignali C., Brandt W.N., Schneider D.P., Anderson S.F., Fan X., Gunn J.E., Kaspi S., Richards G.T., Strauss M.A., 2003, AJ, 125, 2876

• X-ray Emission from Radio-Quiet Quasars in the SDSS Early Data Release. The alpha-ox Dependence Upon Ultraviolet Luminosity
• Table 2 in electronic format

Vignali C., Brandt W.N., Schneider D.P., 2003, AJ, 125, 433

• X-ray Lighthouses of the High-Redshift Universe: Probing the Most Luminous z > 4 Palomar Digital Sky Survey Quasars with Chandra
• List of high-redshift (z > 4) X-ray detections
• Hobby-Eberly Telescope optical spectra of the PSS quasars
• "Pretty" versions of the Constellation-X simulations

Vignali C., Brandt W.N., Schneider D.P., Garmire G.P., Kaspi S., 2003, AJ, 125, 418

• Grating X-ray Spectroscopy of High-Velocity Outflows from Active Galaxies
• Figures from this paper in GIF format

Brandt W.N., Kaspi S., 2002, in Proceedings of the 16th International Conference on Spectral Line Shapes, ed. C. Back (AIP, Woodbury), p. 119-130

• Chandra and XMM-Newton Observations of the Highest Redshift Quasars: X-rays from the Dawn of the Modern Universe
• List of high-redshift (z > 4) X-ray detections

Brandt W.N., Vignali C., Fan X., Kaspi S., Schneider D.P., 2002, in X-ray Spectroscopy of AGN with Chandra and XMM-Newton, ed. Th. Boller, S. Komossa, S. Kahn, H. Kunieda, L. Gallo (MPE Press, Garching), p. 235-242

• Exploratory Chandra Observations of the Three Highest Redshift Quasars Known
• Alpha_ox versus redshift
• SDSS 0836+0054 - Full-band adaptively smoothed image (FITS)
• SDSS 1030+0524 - Full-band adaptively smoothed image (FITS)
• SDSS 1306+0356 - Full-band adaptively smoothed image (FITS)
• Chandra X-ray Center press release
• Penn State press release

Brandt W.N., Schneider D.P., Fan X., Strauss M.A., Gunn J.E., Richards G.T., Anderson S.F., Vanden Berk D.E., Bahcall N.A., Brinkmann J., Brunner R., Chen B., Hennessy G.S., Lamb D.Q., Voges W., York D.G., 2002, ApJ, 569, L5

• The Luminosity Dependence of Ultraviolet Absorption in Active Galactic Nuclei
• UV spectral data for the 56 PG AGN analyzed for intrinsic absorption

Laor A., Brandt W.N., 2002, ApJ, 569, 641

• The Chandra Deep Field North Survey. X. X-ray Emission from Very Red Objects

Alexander D.M., Vignali C., Bauer F.E., Brandt W.N., Hornschemeier A.E., Garmire G.P., Schneider D.P., 2002, AJ, 123, 1149

• Exploratory Chandra Observations of the Highest-Redshift Quasars: X-rays from the Dawn of the Modern Universe
• Presentation at `Two Years of Science with Chandra' - cover page (PDF)
• Presentation at `Two Years of Science with Chandra' - presentation (PDF)

Vignali C., Brandt W.N., Fan X., Gunn J.E., Kaspi S., Schneider D.P., Strauss M.A., 2001, AJ, 122, 2143

• The Chandra Deep Field North Survey. V. 1 Ms Source Catalogs

Brandt W.N., Alexander D.M., Hornschemeier A.E., Garmire G.P., Schneider D.P., Barger A.J., Bauer F.E., Broos P.S., Cowie L.L., Townsley L.K., Burrows D.N., Chartas G., Feigelson E.D., Griffiths R.E., Nousek J.A., Sargent W.L.W., 2001, AJ, 122, 2810

• The Chandra Deep Field North Survey. VI. The Nature of the Optically Faint X-ray Source Population

Alexander D.M., Brandt W.N., Hornschemeier A.E., Garmire G.P., Schneider D.P., Bauer F.E., Griffiths R.E., 2001, AJ, 122, 2156

• The Chandra Deep Field North Survey. VII. X-ray Emission from Lyman Break Galaxies

Brandt W.N., Hornschemeier A.E., Schneider D.P., Alexander D.M., Bauer F.E., Garmire G.P., Vignali C., 2001, ApJ, 558, L5

• High-resolution X-ray and ultraviolet spectroscopy of the complex intrinsic absorption in NGC 4051 with Chandra and the Hubble Space Telescope

Collinge M.J., Brandt W.N., Kaspi S., Crenshaw D.M., Elvis M., Kraemer S.B., Reynolds C.S., Sambruna R.M., Wills B.J., 2001, ApJ, 557, 2

• The Chandra Deep Survey of the Hubble Deep Field North Area. IV. An Ultradeep Image of the HDF-N

Brandt W.N., Hornschemeier A.E., Alexander D.M., Garmire G.P., Schneider D.P., Broos P.S., Townsley L.K., Bautz M.W., Feigelson E.D., Griffiths R.E., 2001, AJ, 122, 1

• A Chandra study of the Circinus Galaxy point source population

Bauer F.E., Brandt W.N., Sambruna R.M., Chartas G., Garmire G.P., Kaspi S., Netzer H., 2001, AJ, 122, 182

• High-Resolution X-ray Spectroscopy and Modeling of the Absorbing and Emitting Outflow in NGC 3783

Kaspi S., Brandt W.N., Netzer H., George I.M., Chartas G., Behar E., Sambruna R.M., Garmire G.P., Nousek J.A., 2001, ApJ, 554, 216

• The Chandra Deep Survey of the Hubble Deep Field North Area. II. Results from the Caltech Faint Field Galaxy Redshift Survey Area

Hornschemeier A.E., Brandt W.N., Garmire G.P., Schneider D.P., Barger A.J., Broos P.S., Cowie L.L., Townsley L.K., Bautz M.W., Burrows D.N., Chartas G., Feigelson E.D., Griffiths R.E., Lumb D., Nousek J.A., Ramsey L.W., Sargent W.L.W., 2001, ApJ, 554, 742

• An XMM-Newton Detection of the z=5.80 X-ray Weak Quasar SDSSp J104433.04-012502.2 (POSTSCRIPT)
• A color picture of SDSSp J104433.04-012502.2 (PDF)

W.N. Brandt, M. Guainazzi, S. Kaspi, X. Fan, D.P. Schneider, Michael A. Strauss, J. Clavel, J.E. Gunn, 2001, AJ, 121, 591

• Heavy X-ray Absorption in Soft X-ray Weak Active Galactic Nuclei (POSTSCRIPT)

Gallagher S.C., Brandt W.N., Laor A., Elvis M., Mathur S., Wills B.J., Iyomoto N., 2001, ApJ, 546, 795

• The Discovery of Broad P Cygni X-ray Lines from Circinus X-1 with the Chandra High Energy Transmission Grating Spectrometer (POSTSCRIPT)
• The Circinus X-1 press release page

Brandt W.N., Schulz N.S., 2000, ApJ, 544, L123

• Compton-thick X-ray absorption in the Seyfert galaxies Tololo 0109-383 and ESO 138-G1 (POSTSCRIPT)

Collinge M.J., Brandt W.N., 2000, MNRAS, 317, L35

• X-ray Sources in the Hubble Deep Field Detected by Chandra

Hornschemeier A.E., Brandt W.N., Garmire G.P., Schneider D.P., Broos P.S., Townsley L.K., Bautz M.W., Burrows D.N., Chartas G., Feigelson E.D., Griffiths R., Lumb D., Nousek J.A., Sargent W.L.W., 2000, ApJ, 541, 49

• Discovery of narrow X-ray absorption lines from NGC 3783 with the Chandra HETGS (POSTSCRIPT)
• An enlarged view of the HETGS spectrum (POSTSCRIPT)

Kaspi S., Brandt W.N., Netzer H., Sambruna R.M., Chartas G., Garmire G.P., Nousek J.A., 2000, ApJ, 535, L17

• Observational Similarities and Potential Connections Between Luminous Ultrasoft NLS1 and BALQSOs (POSTSCRIPT)

Brandt W.N., Gallagher S.C., 2000, in Observational and Theoretical Progress in the Study of Narrow-Line Seyfert 1 Galaxies, ed. Boller Th., Brandt W.N., Leighly K.M., Ward M.J., New Astronomy Reviews, 44, 461

• X-ray Absorption in Radio-Quiet QSOs (POSTSCRIPT)

Brandt W.N., Gallagher S.C., Laor A., Wills B.J., 2000, to appear in the proceedings of the Bologna conference on "X-ray Astronomy 1999: Stellar Endpoints, AGN, and the Diffuse X-ray Background"

• Observations of Faint, Hard-Band X-ray Sources in the Field of CRSS J0030.5+2618 with the Chandra X-ray Observatory and the Hobby-Eberly Telescope

Brandt W.N., Hornschemeier A.E., Schneider D.P., Garmire G.P., Chartas G., Hill Gary J., MacQueen P.J., Townsley L.K., Burrows D.N., Koch T.S., Nousek J.A., Ramsey L.W., 2000, AJ, 119, 2349

• The X-ray Properties of z > 4 Quasars

Kaspi S., Brandt W.N., Schneider D.P., 2000, AJ, 119, 2031

• New X-ray Constraints on Starburst and Seyfert Activity in the Barred Spiral Galaxy NGC 1672 (POSTSCRIPT)

de Naray P.J., Brandt W.N., Halpern J.P., Iwasawa K., 2000, AJ, 119, 612

• On the Nature of Soft X-ray Weak Quasi-Stellar Objects (POSTSCRIPT)
• Overheads from a talk on SXW QSOs given at the 194th Meeting of the AAS (POSTSCRIPT)

Brandt W.N., Laor A., Wills B.J., 2000, ApJ, 528, 637

• X-rays from the Highly Polarized Broad Absorption Line QSO CSO 755 (POSTSCRIPT)

Brandt W.N., Comastri A., Gallagher S.C., Sambruna R.M., Boller Th., Laor A., 1999, ApJ, 525, L69

• PKS 1004+13: A High-Inclination, Highly Absorbed Radio-Loud QSO - The First Radio-Loud BAL QSO at Low Redshift?

Wills B.J., Brandt W.N., Laor A., 1999, ApJ, 520, L91

• Exploratory ASCA observations of Broad Absorption Line Quasi-Stellar Objects (POSTSCRIPT)

Gallagher S.C., Brandt W.N., Sambruna R.M., Mathur S., Yamasaki N., 1999, ApJ, 519, 549

• ROSAT HRI monitoring of extreme X-ray variability in the narrow-line quasar PHL 1092 (POSTSCRIPT)

Brandt W.N., Boller Th., Fabian A.C., Ruszkowski M., 1999, MNRAS, 303, L53

• Ultrasoft narrow-line Seyfert 1 galaxies: What physical parameter ultimately drives the structure and kinematics of their Broad Line Regions? (POSTSCRIPT)

Brandt W.N., Boller Th. 1999, in Structure and Kinematics of Quasar Broad Line Regions, ed. Gaskell C.M., Brandt W.N., Dietrich M., Dultzin-Hacyan D. & Eracleous M. (ASP Press: San Francisco), p. 265

• Heavy and complex X-ray absorption towards the nucleus of Markarian 6 (POSTSCRIPT)
• A probable geometry for Markarian 6 (POSTSCRIPT)
• Feldmeier J.J., Brandt W.N., Elvis M., Fabian A.C., Iwasawa K., Mathur S., 1999, ApJ, 510, 167

• BeppoSAX observations of narrow-line Seyfert 1 galaxies: I. Ton S 180 (POSTSCRIPT)

Comastri A., Fiore F., Guainazzi M., Matt G., Stirpe G.M., Zamorani G., Brandt W.N., Leighly K.M., Piro L., Molendi S., Parmar A.N., Siemiginowska A., Puchnarewicz E.M., 1998, A&A, 333, 31-37

• Ultrasoft narrow-line Seyfert 1 galaxies and X-ray surveys (POSTSCRIPT)
• Click here to see the extended Boroson & Green eigenvector (POSTSCRIPT)

Brandt W.N., Boller Th., 1998, Astron Nachr, 319, 7 (Proceedings of the Potsdam X-ray Surveys Workshop)

• X-ray absorption by ionized oxygen in ASCA spectra of the infrared quasar IRAS 13349+2438 (POSTSCRIPT)
• Click here for the abstract
• Click here to see the dusty warm absorber residuals (POSTSCRIPT)
• Click here to see the edge confidence contours (POSTSCRIPT)

Brandt W.N., Mathur S., Reynolds C.S., Elvis M., 1997, MNRAS, 292, 407

• ROSAT HRI observations of the Local Group galaxies IC 10, NGC 147 and NGC 185 (POSTSCRIPT)
• Click here for the abstract
• Click here to see the IC 10 radio superbubble and the X-ray position (POSTSCRIPT)

Brandt W.N., Ward M.J., Fabian A.C., Hodge P.W., 1997, MNRAS, 291, 709

• The extreme X-ray luminosity of the redshift 4.72 radio-loud quasar GB 1428+4217
• Click here for the abstract

Fabian A.C., Brandt W.N., McMahon R.G., Hook I.M., 1997, MNRAS, 291, L5

• ASCA spectroscopy of IRAS 23060+0505: penetrating the torus of a type 2 quasar with X-rays
• Click here for the abstract

Brandt W.N., Fabian A.C., Takahashi K., Fujimoto R., Yamashita A., Inoue H., Ogasaka Y., 1997, MNRAS, 290, 617

• ROSAT monitoring of persistent giant and rapid variability in the narrow-line Seyfert 1 galaxy IRAS 13224-3809 (POSTSCRIPT)
• Click here for the abstract
• Click here to see the monitoring light curve for IRAS 13224-3809 (POSTSCRIPT)

Boller Th., Brandt W.N., Fabian A.C., Fink H., 1997, MNRAS, 289, 393

• The remarkable properties of the ultrasoft WFC AGN Zwicky 159.034 (chapter 3 of my PhD thesis; POSTSCRIPT)
• Click here to see the X-ray outburst

This is the most detailed description of the outburst of Zwicky 159.034, and much of it is unpublished. Zwicky 159.034 showed the most remarkable outburst activity I have ever seen from a Seyfert galaxy. If you ever see anything else like it, please let me know as soon as possible.

Brandt W.N., 1995, PhD thesis, University of Cambridge

• A comparison of the hard ASCA spectral slopes of broad and narrow-line Seyfert 1 galaxies (POSTSCRIPT)
• Click here for the abstract
• Click here for an updated plot of the master correlation (POSTSCRIPT)

Brandt W.N., Mathur S., Elvis M., 1997, MNRAS, 285, L25

• Steep spectrum Seyfert galaxies (POSTSCRIPT)
• Click here for the abstract

Pounds K.A., Brandt W.N., 1997, in Makino F., Mitsuda K., eds, X-Ray Imaging and Spectroscopy of Cosmic Hot Plasmas: ASCA Third Anniversary Proceedings. Univ. Acad. Press, Tokyo, p. 209

• ASCA observations of the iron K complex of Circinus X-1 near zero phase: spectral evidence for partial covering (POSTSCRIPT)
• Click here for the abstract

Brandt W.N., Fabian A.C., Dotani T., Nagase F., Inoue H., Kotani T., Segawa Y., 1996, MNRAS, 283, 1071

• A powerful and highly variable off-nuclear X-ray source in the composite starburst/Seyfert 2 galaxy NGC 4945 (POSTSCRIPT)
• Click here for the abstract
• Click here to see NGC 4945 and the variable X-ray source

Brandt W.N., Iwasawa K., Reynolds C.S., 1996, MNRAS, 281, L41