A sample of 25 extragalactic radio sources having a spectrum peaked around 1 GHz: Gopal-Krishna, A.R.Patnaik and H. Steppe, 1983, A&A, 123, 107.
VLA observations of the wide angle tailed radio source 1313+073: A.R.Patnaik, D.G.Banhatti and C.R.Subrahmanya, 1984, MNRAS, 211, 775.
Two remarkable bright supernova remnants: P.A.Shaver, C.J.Salter, A.R.Patnaik, J.H.van Gorkom and G.C.Hunt, 1985, Nature, 313, 113.
The compact radio source near G357.7-0.1: P.A.Shaver, S.R.Pottasch, C.J.Salter, A.R.Patnaik, J.H.van Gorkom and G.C.Hunt, 1985, A&A, 147, L23.
VLA observations of extreme hydrogen deficient stars: N.K.Rao, V.R.Venugopal and A.R.Patnaik, 1985, JA&A, 6, 153.
A sample of 25 extragalactic radio sources having a spectrum peaked around 1 GHz (List 2): T.A.Th.Spoelstra, A.R.Patnaik and Gopal-Krishna, 1985, A&A, 152, 38.
Radio observations of the S0 galaxy NGC 1218(3C78): D.J.Saikia, C.R.Subrahmanya, A.R.Patnaik, S.W.Unger, T.J.Cornwell, D.A.Graham, T.P.Prabhu, 1986, MNRAS, 219, 545.
Multifrequency observations of the wide angle tail radio source 1313+073: A.R.Patnaik, M.A.Malkan and C.J.Salter, 1986, MNRAS, 220, 351.
G350.1-0.3: A peculiar radio source at low galactic latitude: C.J.Salter, A.R.Patnaik, P.A.Shaver and G.C.Hunt, 1986, A&A, 162, 217.
Search for plerions in the direction of two young pulsars: S.Krishnamohan, D.K.Mohanty, A.R.Patnaik and T.Velusamy, 1987, in Proceedings of the 125th symposium of the IAU held in Nanjing, China, May 26-30, 1986 Ed. by D.J. Helfand and J.H. Huang, p124
Further VLA Observations of Hydrogen Deficient Stars: N.K.Rao, V.R.Venugopal and A.R.Patnaik, 1987, JA&A, 8, 227.
G18.95-1.1: A shell type supernova remnant with a central object ?: A.R.Patnaik, T.Velusamy and V.R.Venugopal, 1988, Nature, 332, 136.
A very long head-tail radio galaxy in the X-ray cluster 2A0335+096: A.R.Patnaik and K.P.Singh, 1988, MNRAS, 234, 847.
High dynamic-range observations of the supernova remnant G39.2-0.3 and the HII region NRAO 591: A.R.Patnaik, G.C.Hunt, C.J.Salter, P.A.Shaver and T.Velusamy, 1990, A&A, 232, 467.
Multifrequency VLA observations of GHz-peaked-spectrum radio sources: C.P.O'Dea, S.A.Baum, C.Stanghellini, G.B.Morris, A.R.Patnaik and Gopal-Krishna, 1990, A&AS, 84, 549.
CCD image data acquisition system for optical astronomy: Bhat, P.N., A.K.Kembhavi, K.Patnaik, A.R.Patnaik and T.P. Prabhu, 1990, Indian J. of Pure and Applied Physics 28, 649.
Phase calibrators for MERLIN: A.R.Patnaik, I.W.A.Browne, P.N.Wilkinson and J.M.Wrobel, 1991, in IAU Colloquium 131, eds Cornwell, T.J., Perley, R.A., p. 257
An unusually strong Einstein ring in the radio source PKS1830-211: D.L.Jauncey (and 34 others), 1991, Nature, 352, 132.
Interferometer Phase Calibration Sources I. The Region 35deg < dec < 75deg: A.R.Patnaik, I.W.A.Browne, P.N.Wilkinson and J.M.Wrobel, 1992, MNRAS, 254, 655.
0218+357: The Smallest Einstein Ring: A.R.Patnaik, I.W.A.Browne, L.J.King, T.W.B.Muxlow, D.Walsh and P.N.Wilkinson, 1992, In Gravitational Lenses, eds R.Kayser, T.Schramm, L.Nieser, Springer-Verlag, p140.
Recent Observations of PKS1830-211: D.L.Jauncey et al. 1992, In Gravitational Lenses, eds R.Kayser, T.Schramm, L.Nieser, Springer-Verlag, p333.
B1422+231: A New Gravitationally Lensed System at z=3.62: A.R.Patnaik, I.W.A.Browne, D.Walsh, F.H.Chaffee and C.B.Foltz, 1992, MNRAS, 259, 1p.
Infrared Observations of the Gravitational Lens System 1422+231: C.R.Lawrence, G.Neugebauer, N.Weir, K.Matthews and A.R.Patnaik, 1992, MNRAS, 259, 5p.
B0218+35.7: a gravitationally lensed system with the smallest separation: A.R.Patnaik, I.W.A.Browne, L.J.King, T.W.B.Muxlow, D.Walsh and P.N.Wilkinson, 1993a, MNRAS, 261, 435.
Search for small separation gravitational lens systems: A.R.Patnaik, I.W.A.Browne, L.J.King, T.W.B.Muxlow, D.Walsh, P.N.Wilkinson, 1993b, in Sub-Arcsec Radio Astronomy, eds R.S.Booth, R.J.Davis, Cambridge University Press, p. 137
The Jodrell Bank Lens Survey: L.J.King, I.W.A.Browne, A.R.Patnaik, T.W.B.Muxlow, D.Walsh, P.N.Wilkinson, 1993, in Sub-Arcsec Radio Astronomy, eds R.S.Booth, R.J.Davis, Cambridge University Press, p. 144
MERLIN observations of 3 gravitational lens candidates: M.A.Garrett, A.R.Patnaik, T.W.B.Muxlow, P.N.Wilkinson, D.Walsh, in Sub-Arcsec Radio Astronomy, eds R.S.Booth, R.J.Davis, Cambridge University Press, p. 146
Radio polarisation observations of 807 flat spectrum sources: C.E.Akujor, A.R.Patnaik, 1993, in Sub-Arcsec Radio Astronomy, eds R.S.Booth, R.J.Davis, Cambridge University Press.
The redshift of the lensing galaxy in the gravitationally lensed system B0218+35.7: I.W.A.Browne, A.R.Patnaik, D.Walsh, P.N.Wilkinson, 1993, MNRAS, 263, L32
Bias in observed lenses from Jodrell Bank survey: D.Narasimha, A.R.Patnaik, 1993, 'Gravitational Lenses in the Universe', eds J.Surdej et al. Université de Liège, p295.
Radio observations of gravitational lenses: A.R. Patnaik 1993, Invited review talk, 'Gravitational Lenses in the Universe', eds J.Surdej et al. Université de Liège, p311.
A VLBI search for lenses with separations of 1-100mas: Current Status: D.R.Henstock, P.N.Wilkinson, I.W.A.Browne, A.R.Patnaik, A.C.S.Readhead, R.C.Vermeulen, T.J.Pearson, 1993, 'Gravitational Lenses in the Universe', eds J.Surdej et al. Université de Liège, p325.
MERLIN observations of the gravitational lensed system 2016+112: M.A.Garrett, A.R.Patnaik, T.W.B.Muxlow, D.Walsh, 1993,'Gravitational Lenses in the Universe', eds J.Surdej et al. Université de Liège, p351.
MERLIN observations of PKS1830-211: A.R. Patnaik, T.W.B. Muxlow, D.L. Jauncey, 1993, 'Gravitational Lenses in the Universe', eds J.Surdej et al. Université de Liège, p363.
A catalogue of phase reference sources: A.R. Patnaik, paper presented at 9th European meeting on geodesy and astrometry, Bad Neuenahr, Germany, p150.
Optically quiet quasars - Radio and Optical investigations: C.E.Akujor, R.W.Porcas, A.R.Patnaik, A.Ardeberg, 1994, IAU Symp. 159, eds T.J.-L.Courvoisier and A.Blecha, p419.
Global VLBI observations of the gravitational lens B0218+357: A.R.Patnaik, R.W.Porcas, I.W.A.Browne, T.W.B.Muxlow, D.Narasimha, 1994, in Compact Extragalactic Radio Sources, workshop held in Soccoro, ed J.A.Zensus, K.I.Kellermann, NRAO, p129.
Gravitational milli-lens candidates in the CJ2 survey: P.N.Wilkinson, D.R.Henstock, I.W.A.Browne, A.R.Patnaik, A.C.S.Readhead, G.B.Taylor, T.J.Pearson, R.C.Vermeulen, 1994, in Compact Extragalactic Radio Sources, workshop held in Soccoro, ed J.A.Zensus, K.I.Kellermann, NRAO, p259.
MERLIN observations of the gravitational lens system 2016+112: M.A.Garrett, T.W.B.Muxlow, A.R.Patnaik, D.Walsh, 1994, MNRAS, 269, 902.
GB1508+5714: a radio-loud quasar with z=4.30, and the space density of high-redshift, radio-loud quasars: I.M.Hook, R.G.McMahon, A.R.Patnaik, I.W.A.Browne, P.N.Wilkinson, M.J.Irwin, C.Hazard, 1995, MNRAS, 273, L63.
VLBA observations of the Gravitational Lens System B0218+357: A.R.Patnaik, R.W.Porcas, I.W.A.Browne, 1995, MNRAS, 274, L5.
Radio measurement of the time delay in 0218+357: E.A.Corbett, I.W.A. Browne, P.N. Wilkinson, A.R. Patnaik, 1996, in Astrophysical Applications of Gravitational Lensing, IAU Symp. 173, eds. C.S.Kochanek and J.N.Hewitt, Kluwer, p37.
A search for dark matter in the halos of lensing galaxies using VLBI: M.A.Garrett, S.Nair, R.W.Porcas, A.R.Patnaik, 1996, in Astrophysical Applications of Gravitational Lensing, IAU Symp. 173, eds. C.S.Kochanek and J.N.Hewitt, Kluwer, p189.
Observed and predictions of the ratio of 3-image to 5-image systems in JVAS: L.J.King, I.W.A.Browne, P.N.Wilkinson, A.R.Patnaik, 1996, in Astrophysical Applications of Gravitational Lensing, IAU Symp. 173, eds. C.S.Kochanek and J.N.Hewitt, Kluwer, p191.
Milliarcsecond structures in gravitationally lensed systems: A.R.Patnaik, R.W.Porcas, 1996, in Astrophysical Applications of Gravitational Lensing, IAU Symp. 173, eds. C.S.Kochanek and J.N.Hewitt, Kluwer, p305.
Multi-frequency VLBI observations of B0218+357: R.W.Porcas, A.R.Patnaik, 1996, in Astrophysical Applications of Gravitational Lensing, IAU Symp. 173, eds. C.S.Kochanek and J.N.Hewitt, Kluwer, p311.
New optical and MERLIN images of the quadruple gravitational lens B1422+231: C.E.Akujor, A.R.Patnaik, J.V.Smoker, S.T.Garrington, 1996, in Astrophysical Applications of Gravitational Lensing, IAU Symp. 173, eds. C.S.Kochanek and J.N.Hewitt, Kluwer, p335.
EVN-MERLIN observations of the remarkable lens system 2016+112: M.A.Garrett, S.Nair, D.Walsh, R.W.Porcas, A.R.Patnaik, 1996, in Astrophysical Applications of Gravitational Lensing, IAU Symp. 173, eds. C.S.Kochanek and J.N.Hewitt, Kluwer, p339.
Optical imaging of B1422+231: Prospects for determining H: J.Hjorth, A.O.Jaunsen, A.R.Patnaik, J.-P.Kneib, 1996, in Astrophysical Applications of Gravitational Lensing, IAU Symp. 173, eds. C.S.Kochanek and J.N.Hewitt, Kluwer, p343.
New radio observations of 'Old Faithful': R.W.Porcas, A.R.Patnaik, T.W.B.Muxlow, M.A.Garrett, D.Walsh, 1996, in Astrophysical Applications of Gravitational Lensing, IAU Symp. 173, eds. C.S.Kochanek and J.N.Hewitt, Kluwer, p349.
A VLBA 15-GHz small separation gravitational lens survey: A.R.Patnaik, M.A.Garrett, A. Polatidis, D.S.Bagri, 1996, in Astrophysical Applications of Gravitational Lensing, IAU Symp. 173, eds. C.S.Kochanek and J.N.Hewitt, Kluwer, p405.
Wide-field EVN observations of the gravitational lens system 2016+112: M.A.Garrett, R.W. Porcas, S. Nair, A.R. Patnaik, 1996, MNRAS, 279, L7.
Multi-frequency VLBI Observations of the Gravitational Lens B0218+357: R.W. Porcas, A.R.Patnaik, 1996, in Extragalactic radio sources: IAU Symposium 175, eds Ron D. Ekers, C. Fanti, and L. Padrielli, Kluwer, p. 115.
Hubble Space Telescope Observations of the Gravitational Lens System B1422+231: C.D. Impey, C.B. Foltz, C.E. Petry, I.W.A. Browne, A.R. Patnaik, 1996, ApJ, 426, L53.
A deep radio observation of the gravitational lens candidate QSO 2345+007: A.R.Patnaik, P.Schneider, R. Narayan, 1996, MNRAS, 281, L17.
EVN + MERLIN Observations of Radio-intermediate Quasars: Evidence for Boosted Radio-weak Quasars: H. Falcke, A.R.Patnaik, W.Sherwood, 1996, ApJ, 473, L13.
The Nature of Radio-intermediate Quasars: What Is Radio-loud and What Is Radio-quiet?: H. Falcke, W.Sherwood, A.R.Patnaik, 1996, ApJ, 471, 106.
Multi-epoch VLBA 15 and 43 GHz observations of the gravitational lens PKS 1830-211: extending VLBI towards the micro-arcsecond scale: M.A.Garret, S.Nair, R.W.Porcas, A.R.Patnaik, 1997, Vistas in Astronomy, 41, 281.
The Idenfication of EGRET Sources with Flat-Spectrum Radio Sources: J.R. Mattox, J. Schachter, L. Molnar, R.C. Hartman, A.R.Patnaik, 1997, ApJ, 481, 95.
Multifrequency radio observations of the gravitational lens system 1938+666: L.J.King, I.W.A. Browne, T.W.B. Muxlow, D. Narasimha, A.R. Patnaik, R.W. Porcas, P.N. Wilkinson, 1997, MNRAS, 289, 450.
Nuclear radio emission in megaparsec-size radio galaxies: L.Saripalli, A.R. Patnaik, R.W. Porcas, D.A. Graham, 1997, AA, 328, 78.
PKS 1830-211: VLBA lambda 7mm Polarization Observations: M.A. Garrett, K. Leppaenen, R.W. Porcas, A.R. Patnaik, S. Nair, H. Teraesranta, 1998, in Radio Emission from Galactic and Extragalactic Compact Sources, ASP Conference Series, Volume 144, IAU Colloquium 164, eds. J.A. Zensus, G.B. Taylor, & J.M. Wrobel, p. 313.
Magnetic Field Configuration in 4C 39.25: A.Alberdi, L.Lara, J.L.Gomez, J.M.Marcaide, M.A.Perez-Torres, A.Kemball, K.Leppaenen, A.P.Marscher, A.Patnaik, R.W.Porcas, 1998, in Radio Emission from Galactic and Extragalactic Compact Sources, ASP Conference Series, Volume 144, IAU Colloquium 164, eds. J.A. Zensus, G.B. Taylor, & J.M. Wrobel, p.115.
VLBI Observations of the Gravitational Lens B1422+231: A.R. Patnaik and R.W. Porcas, 1998, in Radio Emission from Galactic and Extragalactic Compact Sources, ASP Conference Series, Volume 144, IAU Colloquium 164, eds. J.A. Zensus, G.B. Taylor, & J.M. Wrobel, p. 319.
Interferometer phase calibration sources - II. The region 0 deg < dec < +20deg: I.W.A. Browne, A.R. Patnaik, P.N.Wilkinson, J.M. Wrobel, 1998, MNRAS, 293, 257.
The new gravitational lens system B1030+074: E. Xanthopolous, I.W.A. Browne, L.J. King, L.V.E. Koopmans, N.J. Jackson, D.R. Marlow, A.R. Patnaik, R.W. Porcas, P.N. Wilkinson, 1998, MNRAS, 300, 649.
Interferometer phase calibration sources - III. The region +20deg < dec < 35deg and +75 deg < dec < 90deg: P.N.Wilkinson, I.W.A. Browne, A.R. Patnaik, J.M. Wrobel, B. Sorathia, 1998, MNRAS, 300, 790.
Gigahertz peaked spectrum sources from Jodrell Bank VLA astrometric survey I. Sources in the region +35 deg < dec < +75 deg: A.Marecki, H.Falcke, J.Niezgoda, S.T.Garrington, A.R.Patnaik, 1999, A&A Suppl., 135, 273.
A major radio outburst in III Zw 2 with an extremely inverted, millimeter-peaked spectrum: H.Falcke, G.C.Bower, A.P.Lobanov, T.P.Kirchbaum, A.R.Patnaik, M.F.Aller, H.D.Aller, H.Teraesranta, M.C.Wright, G.Sandell, 1999, ApJ, 514, L17.
Frequency dependent radio structure of the gravitational lens system B0218+357: A.R.Patnaik, R.W.Porcas, 1999, in Highly Redshifted Radio Lines, eds. C. Carilli, S.Radford, K. Menten, G. Langston, (PASP: San Francisco), p247.
Milliarcsec-scale polarisation observations of the gravitational lens B1422+231: A.R.Patnaik, A.J.Kemball, R.W.Porcas, M.A.Garrett, 1999, MNRAS, 307, L1.
Gravitationally lensed radio sources in the Jodrell Bank-VLA Astrometric Survey: L.J.King, I.W.A.Browne, D.R.Marlow, A.R.Patnaik, P.N.Wilkinson, 1999, MNRAS, 307, 225.
Polarisation Observations of Gravitational Lenses: A.R.Patnaik, K.M.Menten, R.W.Porcas, A.J.Kemball, 1999, To appear in "Gravitational Lensing: Recent Progress and Future Goals", Boston University, July 1999, ed. T.G. Brainerd and C.S. Kochanek
VLBI Polarisation Images of the Gravitational Lens B0218+357: A.J.Kemball, A.R.Patnaik, R.W.Porcas, 1999, To appear in "Gravitational Lensing: Recent Progress and Future Goals", Boston University, July 1999, ed. T.G. Brainerd and C.S. Kochanek
Cosmological Parameters from the CERES Project: A. Biggs et al., 1999, IAU Symposium 183, 61.
Changes in the angular separation of the lensed images PKS 1830-211 NE & SW: C. Jin, M.A.Garrett, R.W.Porcas, A.R.Patnaik, 1999, New AR, 43, 767.
VLA and MERLIN monitoring observations of the gravitational lens system B1030+074: E. Xanthopoulos, I.W.A. Browne, P.N. Wilkinson, A.R. Patnaik, 2000, IAU Symposium 201, 106.
III Zw 2, the first superluminal jet in a Seyfert galaxy: A. Brunthaler,H. Falcke, G.C. Bower, M.F. Aller, H.D. Aller, H. Teräsranta, A.P. Lobanov, T.P. Krichbaum, A.R. Patnaik, 2000, AA, 357, L45
New gravitational lenses in the southern sky: J.N. Winn, P.L. Schechter, J.N. Hewitt, A.R. Patnaik, J.E.J. Lovell, 2000, AAS, 197, 10504.
A Nearly Symmetric Double-Image Gravitational Lens: J.N. Winn, J.N. Hewitt, A.R. Patnaik, P.L. Schechter, R.A. Schommer, S. López, J. Maza, S. Wachter, 2001, AJ, 121, 1223.
Sub-milliarcsec-scale structure of the gravitational lens B1600+434: A.R. Patnaik, A.J. Kemball, 2001, AA Letters, accepted.
Determination of time delay from the gravitational lens B1422+231: A.R. Patnaik, D. Narasimha, 2001, MNRAS, accepted.