2012

Norris, Ray P., Lenc, Emil, Roy, Alan L., Spoon, Henrik 2012
The radio core of the Ultraluminous Infrared Galaxy F00183-7111: watching the birth of a quasar
MNRAS (accepted 2012 Feburary 8)

Bertarini, A., Roy, A. L., Corey, B., Walker, R. C., Alef, W., Nothnagel, A. 2011
Effects on Geodetic VLBI Measurements Due to Polarization Leakage in S/X Receivers
Journal of Geodesy, 85, 715
[ADS]

Castangia, P., Impellizzeri, C. M. V., McKean, J. P., Henkel, C., Brunthaler, A., Roy, A. L., Wucknitz, O., Ott, J., & Momjian, E. 2011
Water vapour at high redshift: Arecibo monitoring of the megamaser in MG J0414+0534
A&A, 529, 150
[ADS]

McKean, J. P., Impellizzeri, C. M. V., Roy, A. L., Castangia, P., Samuel, F., Brunthaler, A., Henkel, C., and Wucknitz, O. 2011
A search for gravitationally lensed water masers in dusty quasars and star-forming galaxies
MNRAS, 410, 2506
[ADS]

Roy, A. L., Oosterloo, T., Goss, W. M., Anantharamaiah, K. R. 2010
Detection of the H92alpha recombination line from NGC 4945
A&A, 517, 82
[ADS]

Das, Koyel, Roy, A. L., Keller, R. and Tuccari, G. 2010
Conversion from linear to circular polarization in FPGA
A&A, 509, 23
[ADS]

F. Volino, O. Wucknitz, R.W. Porcas, E. Ros, J.P. McKean, A.Brunthaler, J.A.Munoz, P. Castangia, M.A. Garrett, C. Henkel, C.M.V. Impellizzeri, A. Roy
New Global VLBI observations of the gravitational lensing system MG J0414+0534
inProc 10th European-VLBI network Symposium
20-24 September, 2010, Manchester UK
PoS(10th EVN Symposium)029
[ADS]

Tuccari, G., Buttaccio, S., Nicotra, G., Alef, W., Graham, D., Roy, A., Bertarini, A., Neidhardt, A. Zeitlhoefler, R. 2009
DBBC.2 Backend System: status report
in Proceedings of the 19th European VLBI for Geodesy and Astrometry Working Meeting
24-25 March 2009, Bordeaux
Bourda, G.; Charlot, P.; Collioud, A. (eds.)
pp. 71-73, Universit'e Bordeaux, 1 - CNRS
[ADS]

McKean, J. P. & Roy, A. L. 2009,
Tracing the merger rate of the Universe with APERTIF and ASKAP
in Panoramic Radio Astronomy: Wide-field 1-2 GHz research on galaxy evolution - PRA2009
June 02 - 05 2009, Groningen, the Netherlands
PoS(PRA2009)060
ADS

Impellizzeri, C. M. V., McKean, J. P., Castangia, P., Roy, A. L., Henkel, C., Brunthaler, A., & Wucknitz, O. 2009
Wasser im fruehen Universum
Jahrbuch der Max-Planck-Gesellschaft 2009
[MPG Annual Report]

Impellizzeri, C. M. V., McKean, J. P., Castangia, P., Roy, A. L., Henkel, C., Brunthaler, A., & Wucknitz, O. 2008
A gravitationally lensed water maser in the early Universe
Nature, 456, 927
[ADS]

Doeleman, S. S., Weintroub, J., Rogers, A. E. E., Plambeck, R., Freund, R., Tilanus, R. P. J., Friberg, P., Ziurys, L. M., Moran, J. M., Corey, B. and 18 coauthors, 2008
Event-horizon-scale structure in the supermassive black hole candidate at the Galactic Centre
Nature, 455, 78
[ADS]

Impellizzeri, C. M. V., Henkel, C., Roy, A. L., & Menten, K. M. 2008,
6.7 GHz methanol absorption toward the Seyfert 2 galaxy NGC 3079
A&A, 484, L43
[ADS]

Roy, A. L., Goss, W. M., & Anantharamaiah, K. R. 2008
Detection of the H92alpha recombination line from the starbursts in the Circinus galaxy and NGC 1808
A&A, 483, 79
[ADS]

Juett, A. M., Sarazin, C. L., Clarke, T. E., Andernach, H., Ehle, M., Fujita, Y., Kempner, J. C., Roy, A. L., Rudnick, L. & Slee, O. B. 2008
A Chandra Observation of Abell 13: Investigating the Origin of the Radio Relic
ApJ, 672, 138
[ADS]

Krichbaum, T.P., Bach, U., Graham, D.A., Alef, W., Roy, A., Witzel, A., Zensus, J.A., Bremer, M., & Sanchez, S. 2008
Towards millimeter VLBI
PoS(IX EVN Symposium)001
[PoS]

Impellizzeri, C. M. V., Roy, A. L., & Henkel, C. 2008
The molecular torus in NGC 1052
PoS(IX EVN Symposium)033
[PoS]

Tuccari, G., Alef, W., Bertarini, A., Buttaccio, S., Graham, D., Nicotra, G., Roy, A., Wunderlich, M. 2009
DBBC development status
in Measuring the Future : Proceedings of the Fifth IVS General Meeting
Saint Petersburg
(Eds.) Finkelstein, A.; Behrend, D. Nauka
2008, 376-380.
[ADS]

2007

Middelberg, E., Agudo, I., Roy, A.L., Krichbaum, T. P. 2007
Jet-cloud collisions in the jet of the Seyfert galaxy NGC 3079
MNRAS, 377, 731
[ADS]

Alef, W., Graham, D. A., Rottmann, H., Roy, A. L., Bertarini, A., Deller, A. T., Tingay, S. J. 2007
Software Correlator at MPIfR: Status report
in Proc. 18th European VLBI for Geodesy and Astronomy Working Meeting
Vienna 12-13 April, 2007
J. Boehm, A. Pany, H. Schuh (eds)
Geowissenschaftliche Mitteilungen, Heft No 79, pp 24-26
PDF (272 kB)

Nothnagel, A., Cho, J-. H., Haas, R., Roy, A.L. 2007
WVR calibration applied to European VLBI observing sessions
in Dynamic Planet:Monitoring and Understanding a Dynamic Planet with Geodetic and Oceanographic Tools
IAG Symposium, Cairns, Australia, August 22-26, 2005
International Association of Geodesy Symposia Series, Vol. 130
Tregoning, Paul; Rizos, Chris (Eds.)
ISBN: 978-3-540-49349-5
Springer
pp 152 to 157
PDF (346 kB)

Juett, A. M., Sarazin, C. L.. Clarke, T., Fujita, Y., Andernach, H., Ehle, M., Kempner, J., Roy, A., & Rudnick, L. 2006
X-ray Observations Of Abell 13: Understanding The X-ray And Radio Properties
BAAS, 38, 379
[ADS]

Roy, A. L., Rottmann, H., Teuber, U., Keller, R. 2006
Phase correction of VLBI with water vapour radiometry
in Proc. 8th European VLBI Network Symposium Sep 26th-29th 2006, Torun, Poland
Andrzej Marecki (ed)
PoS, 8thEVN, 58
[PoS] PDF (278 kB)

Impellizzeri, C. M. V., Roy, A. L., Henkel, C. 2006
Molecular tori in AGN: a search using excited states of OH
in Proc. 8th European VLBI Network Symposium Sep 26th-29th 2006, Torun, Poland
Andrzej Marecki (ed)
PoS, 8thEVN, 35
[PoS] PDF (166 kB)

Cho, J., Nothnagel, A., Roy, A. L. & Haas R. 2006
A Generalized Scheme to Retrieve Wet Path Delays from WVR Measurements
Applied to the European Geodetic VLBI Network
in IVS 2006 General Meeting Proceedings Jan 2006, Concepcion, Chile
D. Behrend and K. D. Baver (ed)
NASA/CP-2006-214140 (Hanover: MD, USA) p335
PDF (80 kB)

2005

Impellizzeri, C.M.V., Roy, A. L., Henkel, C., Darling, J., Braatz, J. A. 2005
Molecular tori in AGN: a search using excited states of OH
Astronomische Nachrichten, 326, 544
PS(not yet linked)

Roy, A.L., Goss, W.M., Mohan, Niruj R., Anantharamaiah, K.R. 2005
Radio Recombination Lines from the Starburst Galaxy NGC 3256
A&A, 435, 831
[ADS]

Roy, A.L., Goss, W.M., Mohan, Niruj R., Oosterloo, T., & Anantharamaiah, K.R. 2005
Radio Recombination Lines from Starbursts: NGC 3256, NGC 4945 and the Circinus Galaxy
in The Evolution of Starbursts. 331st Wilhelm and Else Heraeus Seminar.
16 - 20 August, 2004, Bad Honnef, Germany
Susanne Huettemeister, Eva Manthey, Dominik Bomans, Kerstin Weis (eds)
AIP Conf Proc 783 (AIP, New York), p303
[ADS]

Middelberg, E., Roy, A. L., Walker, R. C. & Falcke, H. 2005
VLBI observations of weak sources using fast frequency switching
A&A, 433, 897
[ADS]

Kadler, M., Ros, E., Kerp, J., Roy, A.L., Marscher, A.P., & Zensus J.A. 2005
A Multiband Approach to AGN: Radioscopy & Radio Astronomy
in Multiband approach to AGN Sep 30 - Oct 2, 2004, Bonn, Germany
Lobanov, A. et al. (eds)
Memorie della Societa Astronomica Italiana, 76, p126
[ADS]

Middelberg, E., Krichbaum, T. P., Roy, A. L., Witzel, A., & Zensus, J. A. 2005
Approaching NGC 3079 with VLBI
In: Future Directions in High Resolution Astronomy ,
Celebration of the 10th Anniversary of the Very Long Baseline Array,
June 9th-12th 2003, Socorro, USA
Eds. J. D. Romney & M. J. Reid,
ASP Conf. Ser., 340, 140
[ADS]

Middelberg E., Roy, A. L., Bach, U., Gabuzda, D. C., & Beckert, T. 2005
Where has all the polarization gone?
In: Future Directions in High Resolution Astronomy,
Celebration of the 10th Anniversary of the Very Long Baseline Array,
June 9th-12th 2003, Socorro, USA
Eds. J. D. Romney & M. J. Reid,
ASP Conf Ser., 340, 104
[ADS]

2004

Roy, A.L., Teuber, U. and Keller, R. 2004
The Water Vapour Radiometer at Effelsberg
in Proc. 7th European VLBI Network Symposium Oct 12th-15th 2004, Toledo, Spain Bachiller, R., Colomer, F., Desmurs, J.F., de Vicente, P. (eds)
p265
gzip'd postscript (1.7 MB)

Middelberg, E., Roy, A.L., Walker, R.C., & Falcke, H. 2004
86 GHz VLBI detections of a source with S_86 GHz < 100 mJy
in Proc. 7th European VLBI Network Symposium Oct 12th-15th 2004, Toledo, Spain Bachiller, R., Colomer, F., Desmurs, J.F., de Vicente, P. (eds)
p321
gzip'd postscript (127 kB)

Middelberg, E., Roy, A. L., Nagar, N. M., Krichbaum, T. P., Norris, R. P., Wilson, A. S., Falcke, H., Colbert, E. J. M., Witzel, A. & Fricke, K. J., 2004
Motion and Properties of Nuclear Radio Components in Seyfert Galaxies
A&A, 417, 925
[ADS]

2003

Fujita Y., Sarazin C.L., Kempner J.C., Rudnick L., Slee O.B., Roy A.L., Andernach H., & Ehle M., 2003
Chandra Observations of the Disruption of the Cool Core in Abell 133
In: Matter and Energy in Clusters of Galaxies,
April 23rd-27th, 2002, National Central University, Chung-Li, Taiwan.
Eds. S. Bowyer & C.-Y. Hwang.,
ASP Conf. Ser. 301, 477
[ADS]

Roy, A.L., Teuber, U., & Keller, R. 2003
Tropospheric Delay Measurement at Effelsberg with Water-Vapour Radiometry
In: Proc. 16th Working Meeting on European VLBI for Geodesy and Astrometry,
May 9th-10th 2003, Leipzig, Germany
Edited by: W. Schwegmann & V. Thorandt
BKG: Leipzig
pp 53 to 59
PDF (730 kB)

Alef, W., Krichbaum, T.P., Roy, A.L., Middelberg, E., Graham, D.A., Porcas, R.W., Teuber, U., Keller, R. & Zensus, J.A. 2003
mm-VLBI: A major field of research at MPIfR,
In: New Technologies in VLBI, November 5th-8th 2002, Gyeong-ju, Korea
Edited by: Y.C. Minh
ASP Conf. Ser., 306, 75
ADS

2002

Fujita, Y., Sarazin, C.L., Kempner, J.C., Rudnick, L., Slee, O.B., Roy, A.L., Andernach, H., & Ehle, M., 2002
Chandra Observations of the Disruption of the Cool Core in A133
ApJ, 575, 764
[ADS]

Andernach, H., Slee, O.B., Roy, A.L., & Ehle, M. 2000
Extreme Relic Radio Sources in Four Southern Clusters
in IAU Symposium 199: The Universe at Low Radio Frequencies
Edited by: A. Pramesh Rao, G. Swarup, & Gopal-Krishna
ASP, San Francisco, Vol 201, p.153 - 156
gzip'd postscript (62 kB)

Middelberg, E., Roy, A.L., Walker, R.C., Falcke, H., Krichbaum, T.P.
Higher Resolution VLBI Imaging with Fast Frequency Switching,
In: Proc. 6th European VLBI Network Symposium, June 25th-28th, Bonn, Germany.
Edited by: E. Ros, R.W. Porcas, A.P. Lobanov, & J.A. Zensus
[ADS]

2001

Mundell, C.G., Wilson, A.S., Ulvestad, J.S., Roy, A.L., 2001
The Nature of Flat-Spectrum Nuclear Radio Emission in Seyfert Galaxies,
In: Galaxies and their constituents at the highest angular resolutions.
Edited by: R. Schilizzi, S. Vogel, F. Paresce, & M. Elvis
IAU Symposium, Vol 205, ASP, San Francisco, p72
gzip'd postscript (217 kB)

Roy, A.L., Wrobel, J.M., Wilson, A.S., Ulvestad, J.S., Norris, R.P., Mundell, C.G., Krichbaum, T.P., Falcke, H., & Colbert, E.J.M. 2001
Parsec-Scale Jets and Tori in Seyfert Galaxies,
In: Galaxies and their constituents at the highest angular resolutions.
Edited by: R. Schilizzi, S. Vogel, F. Paresce, & M. Elvis
IAU Symposium, Vol 205, ASP, San Francisco, p70
gzip'd postscript (330 kB)


Slee, O.B., Roy, A.L., Murgia, M., Andernach, H., & Ehle, M. 2001
Four Extreme Relic Radio Sources in Clusters of Galaxies
AJ, 122, 1172
[ADS]

Roy, A.L., Wilson, A.S., Ulvestad, J.S., & Colbert, E.J.M. 2000
Slow Jets in Seyfert Galaxies: NGC 1068,
In: Proceedings of the 5th EVN Symposium. Held at Chalmers Technical University, June 29th - July 1st, 2000
Edited by: J.E. Conway, A.G Polatidis, R.S. Booth, Y.M. Pihlström, Chalmers Technical University, p7
[ADS]

Mundell, C.G., Wilson, A.S., Ulvestad, J.S., & Roy, A.L. 2000
Parsec-Scale Images of Flat-Spectrum Radio Sources in Seyfert Galaxies
ApJ, 529, 816
[ADS]

Roy, A.L., Ulvestad, J.S., Wilson, A.S., Colbert, E.J.M., Mundell, C.G., Wrobel, J.M., Norris, R.P., Falcke, H., & Krichbaum, T. 1999,
Free-Free Absorption on Parsec Scales in Seyfert Galaxies,
in Perspectives in Radio Astronomy: Science with Large Antenna Arrays (Dwingeloo: NFRA),
Edited by: M.P. van Haarlem, p173
gzip'd postscript (421 kB)

Ulvestad, J.S., Wrobel, J.M., Roy, A.L., Wilson, A.S., Falcke, H., & Krichbaum, T.P. 1999,
Sub-Relativistic Radio Jets and Parsec-Scale Absorption in Two Seyfert Galaxies,
ApJ, 517, L81
[ADS]

Mundell, C.G., Wilson, A.S., Ulvestad, J.S., & Roy, A.L. 1999,
Milli Arc Second Radio Images of Seyferts,
AAS 194.6205
[ADS]

Slee, O.B., Roy, A.L., & Andernach, H. 1998,
A VLA Survey of Rich Clusters of Galaxies. IV. An Analysis of the Results,
Aust. J. Phys, 51, 971
[ADS]

Roy, A.L., Norris, R.P., Kesteven, M.J., Troup, E.R., & Reynolds, J.E. 1998,
Seyfert galaxies and the radio-far-infrared correlation,
MNRAS, 301, 1019
[ADS]

Roy, A.L., Ulvestad, J.S., Colbert, E.J.M., Wilson, A.S., & Norris, R.P., 1998,
Survey of Milliarcsec Structure in Eight Seyfert Galaxies: Results on NGC 1068 and NGC 4151,
in IAU Colloquium 164: Radio Emission from Galactic and Extragalactic Compact Sources,
ASP Conference Series, Vol. 144, 301, J.A. Zensus, G.B. Taylor, & J.M. Wrobel (eds)
gzip'd postscript (51 kB)

Wilson, A.S., Roy, A.L., Ulvestad, J.S., Colbert, E.J.M., Weaver, K.A., Braatz, J.A., Henkel, C., Matsuoka, M., Xue, S. & Iyomoto, N. 1998,
The ionization fraction in the obscuring `torus' of an active galactic nucleus,
ApJ, 505, 587
[ADS]

Roy, A.L., Colbert, E.J.M, Wilson, A.S., & Ulvestad, J.S. 1998,
The Compact Radio Sources in the Nucleus of NGC 1068,
ApJ, 504, 147
[ADS]

Slee, O.B., & Roy, A.L. 1998,
An Extreme Example of a Radio Relic in Abell 4038,
MNRAS, 297, L86
[ADS]

Ulvestad, J.S., Roy, A.L., Colbert, E.J., & Wilson, A.S. 1998,
A sub-parsec radio jet or disk in NGC 4151,
ApJ, 496, 196
[ADS]

Ulvestad, J. S., Wrobel, J. M., Roy, A. L., Wilson, A. S., Falcke, H., Krichbaum, T., Bower, G., & Zensus, A. 1998,
Sub-relativistic, Sub-parsec Radio Jets in Two Seyfert Galaxies,
AAS, 193.9003
[ADS]

Halkides, D., Ulvestad, J.S., & Roy, A.L. 1997,
VLBA imaging of the Seyfert galaxy Mrk 348,
AAS, 191, 104.04

Anantharamaiah, K.R., Zhao, J.H., Goss, W.M., Viallafond, F. & Roy, A.L. 1997,
Radio recombination lines from starburst galaxies,
in The Central Regions of the Galaxy and Galaxies,
IAU Symp 184, 80

Roy, A.L., Anantharamaiah, K.R., Zhao, J-.H., Goss, W.M., Viallefond, F., & Phookun, B. 1997,
Radio recombination lines from starburst galaxies,
Revista mexicana de astronomia y astrofisica, serie de conferencias, 6

Norris, R.P, & Roy, A.L. 1997,
The Seyfert-starburst connection
Revista mexicana de astronomia y astrofisica, serie de conferencias, 6, 230

Roy A.L., & Norris R.P. 1997,
Radio-excess infra-red galaxies: a new population of active galaxies?
MNRAS, 289, 824

Norris, R.P., & Roy, A.L. 1996,
Orientation effects and Seyfert cores,
in Extragalactic Radio Sources,
IAU Symp 175, 381, R. Ekers, C. Fanti, & L. Padrielli (eds)

Slee, O.B., Roy, A.L., & Andernach, H. 1996,
A VLA Survey of Rich Clusters of Galaxies III. The Weaker Sources: Maps and Identifications,
Aust. J. Phys, 49, 977

Sadler, E.M., Slee, O.B., Reynolds, J.E., & Roy, A.L. 1995,
Parsec-scale radio cores in spiral galaxies,
MNRAS, 276, 1373

Roy, A.L., Norris, R.P., Kesteven, M.J., Troup, E.R., & Reynolds, J.E. 1994,
Compact radio cores in Seyfert galaxies,
ApJ, 432, 496

Norris, R.P., & Roy, A.L. 1994,
Compact radio cores in Seyfert galaxies,
in Mass-Transfer Induced Activity in Galaxies,
Cambridge University Press, 125, I. Shlosman (ed.)

Slee, O.B., Roy, A.L., & Savage, A. 1994,
A VLA survey of rich clusters of galaxies. 2. The stronger sources - maps, polarization and identifications,
Aust. J. Phys, 47, 145

Norris, R.P., Roy, A.L., Kesteven, M.J., Troup, E.R., & Reynolds, J.E. 1994,
Compact radio nuclei in Seyfert galaxies,
in The First Stromlo Symposium: The Physics of Active Galaxies,
ASP Conference Series, Vol. 54, 169, G.V. Bicknell, M.A. Dopita, & P.J. Quinn (eds)

Zwarthoed, G.A.A., Stewart, R., Penninx, W., van Paradijs, J., van der Klis, M., Roy, A.L., Amy, S.W. 1993,
Radio observations of the low-mass X-ray binary 2S 0921-630,
A&A 267, 101

Staveley-Smith, L., Norris, R.P., Chapman, J.M., Allen, D.A., Whiteoak, J.B., & Roy, A.L. 1992,
A southern OH megamaser survey,
MNRAS 258, 725

Norris, R.P., Roy, A.L., Allen, D.A., Kesteven, M.J., Troup, E.R., & Reynolds, J.E. 1992,
Compact radio cores in Seyfert and Starburst galaxies,
in Relationships Between Active Galactic Nuclei and Starburst Galaxies,
ASP Conference Series, Vol. 31, 71, Alexei V. Filippenko (ed.)

Roy, A.L., Norris, R.P., Allen, D.A., Troup, E.R., & Kesteven, M.J. 1992,
The radio/FIR correlation of Seyfert Galaxies,
in Relationships Between Active Galactic Nuclei and Starburst Galaxies,
ASP Conference Series, Vol. 31, 83, Alexei V. Filippenko (ed.)

Veron-Cetty, M.P., Woltjer, L., & Roy, A.L. 1991,
Galaxies underlying F9 and I09149-6206,
A&A, 246, L73