Published in Refereed Journals
A study of bubble chamber operating conditions for holographic image recording, J. L. Benichou, A. Herve, K. E. Johansson, P. Lecoq, P. Olivier, J. Pothier, G. Waurick, E. Wiatrowski, R. Roosen, S. P. K. Tavernier, G. Van Beek, O. R. Williams, Nucl. Instru. and Meth. , 214 (1983) 245.
A measurement of the total charm cross section in 200 GeV/c and 360 GeV/c PN interactions using a holographic bubble chamber, O. Erriquez, M. Calicchio, M. T. Muciaccia, S. Natali, S. Nuzzo, F. Ruggieri, M. Barth, H. Cobbaert, D. Geiregat, R. Roosen, S. P. K. Tavernier, H. Drevermann, K. Geissler, A. Herve, E. Johansson, P. Lecoq, N. Minaev, P. Olivier, J. H. Bartley, F. W. Bullock, M. Coupland, R. Cranfield, B. G. Duff, M. J. Esten, I. Gjerpe, F. F. Heymann, P. R. Hobson, D. C. Imrie, G. J. Lush, O. R. Williams, J. L. Bailly, J. F. Baland, F. Grard, V. P. Henri, J. Kesteman, M. Boratav, M. C. Touboul, A. M. Touchard, R. Arnold, G. Maurer, J. Hrubec, G. Neuhofer, A. Taurok, Phys. Scr. , 33 (1986) 202.
The Holographic Bubble Chamber Experiment and the determination of the effective charmed quark mass and the K-factor for hadronic Charm Production, H. Cobbaert, P. R. Hobson, R. Arnold, J. L. Bailly, J. F. Balland, M. Barth, J. H. Bartley, M. Boratov, F. W. Bullock, M. Callichio, M. Coupland, H. Drevermann, B. G. Duff, O. Erriquez, M. J. Esten, D. Geiregat, K. Geissler, F. Grard, V. P. Henri, A. Herve, F. F. Heymann, J. Hrubec, D. C. Imrie, E. Johansson, J. Kesteman, P. Lecoq, G. J. Lush, G. Maurer, M. T. Muciaccia, S. Natali, S. Nuzzo, G. Neuhofer, P. Olivier, R. Roosen, F. Ruggieri, A. Taurok, S. P. K. Tavernier, M. C. Touboul, A. M. Touchard, and O. R. Williams, Zeit. fur Physik C, 36 (1987) 577.
Upper limit to the thermal coefficient of the refractive index of fused silica at 184. 9 nm, O. R. Williams, T. J. Sumner, G. K. Rochester, and G. P. Adams, Applied Optics, 26 (1987) 774.
The ultraviolet calibration system for the UK XUV telescope to be flown on the ROSAT satellite, G. P. Adams, G. K. Rochester, T. J. Sumner, and O. R. Williams, J. Phys. E: Sci. Instrum. , 20 (1987) 1261.
COS-B upper limit to the >70 MeV gamma-ray flux from a gamma-ray burst event of 1979 November 9, T. J. Sumner, D. L. Clements, O. R. Williams, and G. K. Rochester, Astron. Astrophys. Suppl. Ser. , 71 (1987) 557.
Ginga observations of the dipping X-ray binary XB1916-053, A. P. Smale, K. O. Mason, O. R. Williams, and M. G. Watson, Publ. Astron. Soc. Japan, 41 (1989) 607.
Ginga observation of the X-ray pulsar 1E2259+586 in the supernova remnant G109. 1-1. 0, K. Koyama, F. Nagase, Y. Ogawara, K. Shinoda, N. Kawaii, M. H. Jones, O. R. Williams, M. G. Watson, K. Makishima, T. Ohashi, Publ. Astron. Soc. Japan, 41 (1989) 461.
The origin and behaviour of the background in the large area counters on Ginga and its effect on the sensitivity, K. Hayashida, H. Inoue, O. R. Williams, M. Denby, G. C. Stewart, M. J. L. Turner, H. Awaki, Y. Tawara, K. Koyama, S. Takano, K. Makishima, and T. Ohashi, Publ. Astron. Soc. Japan, 41 (1989) 373.
X-ray spectral study of M31 with Ginga, K. Makishima, T. Ohasi, K. Hayashida, H. Inoue, K. Koyama, S. Takano, Y. Tanaka, A. Yoshida, M. J. L. Turner, H. D. Thomas, G. C. Stewart, O. R. Williams, H. Awaki, Y. Tawara, Publ. Astron. Soc. Japan, 41 (1989), 697.
X-ray outburst of the superluminal quasar 3C279, F. Makino, T. Kii, K. Hayashida, H. Inoue, T. Ohashi, K. Makishima, H. Awaki, K. Koyama, M. J. L. Turner, O. R. Williams, Ap. J. Letters, 347 (1989) L9.
The X-Ray Emission of 3C273, Turner M. J. L. , Williams O. R. , Courvoisier T. J-L. , Stewart G. C. , Nandra K. , Pounds K. A. , Ohashi T. , Makashima K. , Inoue H. , Kii T. , Makino F. , Hayashida K. , Tanaka Y. , Takano S. & Koyama K. Mon. Not. Roy. astr. Soc. , 244 (1989) 310.
The X-ray continuum and evidence for an iron emission line from the quasar E1821+643, T. Kii, O. R. Williams, T. Ohashi, H. Awaki, K. Hayashida, H. Inoue, H. Kondo, K. Koyama, F. Makino, K. Makishima, R. Saxton, G. C. Stewart, Y. Tanaka, M. J. L. Turner, Ap. J. , 367 (1991).
Ginga X-ray observation of EX Hya: New constraints on the accretion model, S. R. Rosen, K. O. Mason, K. Mukai, O. R. Williams, Mon. Not. Roy. astr. Soc. , 249 (1992) 417.
The X-ray spectra of high luminosity AGN observed by Ginga, O. R. Williams, M. J. L. Turner, G. C. Stewart, R. D. Saxton, T. Ohashi, K. Makishima, H. Inoue, T. Kii, F. Makino, Y. Tanaka, K. Hayashida, K. Koyama, and S. Takano, Ap. J. , 389 (1992) 157.
Hard X-rays from the contact binary VW Cephei Tsuru, T., Makishima, K., Ohashi, T., Sakao, T., Pye, J. P., Williams, O. R.; Barstow, M. A.; Takano, S. MNRAS, 255 (1992) 192.
The Soft Excess of High Luminosity AGN Observed by EXOSAT, R. D. Saxton, M. J. L. Turner, O. R. Williams, G. C. Stewart, T. Ohashi, and T. Kii, MNRAS , 262 (1993) 63.
Energy structure of the accretion disc corona in X1822-371, C. Hellier, K. O. Mason, O. R. Williams, MNRAS, 258, 457.
Radio loud and radio quiet quasars observed by EXOSAT, A. J. Lawson, M. J. L. Turner, O. R. Williams, G. C. Stewart, and R. D. Saxton, MNRAS, 259 (1992) 743.
Ginga observations of the dipping low mass X-ray binaries XB1916-053 and EXO 0748-676, A. P. Smale, K. Mukai, O. R. Williams, M. H. Jones, R. H. D. Corbet, Ap. J., 400 (1992) 330.
X-ray spectra of bright core-dominant quasars: NRAO 140 and 4C 34.47, T. Ohashi, M. Tashiro, K. Makishima, T. Kii, F. Makino, M. J. L. Turner, and O. R. Williams, Ap. J, 398 (1992) 870.
Observations of gamma-ray bursts by COMPTEL. L. O. Hanlon,K. Bennett, O. R. Williams, C. Winker, W. Collmar, R. Diehl J. Greiner V. Schoenfelder, H. Steinle, A. W. Strong, A. Connors, M. Kippen, M. McConnell, J. Ryan, M. Varendorff, R. van Dijk, J.W. den Herder, W. Hermsen, and L. Kuiper A&A, 285 (1994) 161 COMPTEL observations of the quasars 3C273 and 3C279. O. R. Williams, K. Bennett, H. Bloemen W. Collmar, R. Diehl W. Hermsen, G. G. Lichti, M. McConnell, Morris,D., R. Much, J. Ryan, V. Schoenfelder, H. Steinle, and A. W. Strong, A&A (1995) in press.
Gravitational lensing origin for a possible gamma-ray burst repeater? L. O. Hanlon, W. Hermsen, M. Kippen, Matz, S., O'Flaherty,K.S., J. Ryan, V. Schoenfelder,O. R. Williams, C. Winkler, A&A (1995) in press.
Upper Limits on the MeV Emission on Seyfert Galaxies. M. Maisack, W. Collmar, P. Barr, H. Bloemen W. Hermsen, G. G. Lichti, M. McConnell, V. Schoenfelder, J. G. Stacy, H. Steinle, and O.R Williams, A&A (1995) in press.
The detection of an unidentified variable gamma-ray source by COMPTEL O. R. Williams, Much,R., K. Bennett, H. Bloemen W. Collmar, W. Hermsen, G. G. Lichti, M. McConnell, J. Ryan, V. Schoenfelder, H. Steinle, and C. Winker, A&A (1995) in press.
COMPTEL observations of the strong gamma-ray burst GRB 940217. C. Winkler, R.M. Kippen, K. Bennett, W. Collmar, L.O. Hanlon, W. Hermsen, K.S. O'Flaherty, J. Ryan, V. Schonfelder H. Steinle, O.R. Williams. 1995 A&A...302..765W
The gamma-ray burst GB 920622. J. Greiner, M. Sommer, N. Bade, G.J. Fishman, L.O. Hanlon, K. Hurley, R.M. Kippen, C. Kouveliotou, R. Preece, J. Ryan, V. Schoenfelder, O.R. Williams, C. Winkler, M. Boer, M. Niel. 1995A&A...302..121G
PKS 0208-512 detected at MeV energies by COMPTEL: a new 'MeV-blazar' candidate J.J. Blom, K. Bennett, H. Bloemen, W. Collmar, R. Diehl, W. Hermsen, A.F. Iyudin, V. Schoenfelder, J.G. Stacy, H. Steinle, O.R. Williams, C. Winkler. 1995A&A...298L..33B
Published in Conference Proceedings
The spectra (2-10 keV) of high luminosity quasars, M. J. L. Turner, O. R. Williams, R. Saxton, G. C. Stewart, T. J-L. Courvoisier, T. Ohashi, K. Makishima, T. Kii, H. Inoue, Proceedings of the 23rd ESLAB Symposium on X-ray Astronomy, Bologna, ed. White, N. E. , ESA SP-296 (1990) p769.
Ginga observations of dipping low mass X-ray binaries, A. P. Smale, K. Mukai, O. R. Williams, M. H. Jones, A. N. Parmar, R. H. D. Corbet, Proceedings of the 23rd ESLAB Symposium on X-ray Astronomy, Bologna, ed. White, N. E. , ESA SP-296 (1990) p607.
X-ray spectra of OVV QSOs, T. Ohashi, T. Kii, K. Hayashida, H. Inoue, K. Koyama, K. Makishima, M. J. L. Turner, O. R. Williams, Proceedings of the 23rd ESLAB Symposium on X-ray Astronomy, Bologna, ed. White, N. E. , ESA SP-296 (1990) p837. Ginga observations of high luminosity AGN, M. J. L. Turner, O. R. Williams, G. C. Stewart, R. D. Saxton, T. Ohashi, K. Makishima, T. Kii, and F. Makino in Proc. 28th Yamada Conference on Frontiers in X-ray Astronomy, Nagoya, in press.
Ginga observations of Blazars, T. Kii, F. Makino, C. Otani, T. Ohashi, M. Tashiro, K. Hayashida, N. Kawai, O. R. Williams, M. J. L. Turner and H. Terasranta, in Proc. 28th Yamada Conference on Frontiers in X-ray Astronomy, Nagoya, in press.
COMPTEL Observations of Gamma Ray Bursts. C. Winkler, K. Bennett, H. Bloemen, H. de Boer, M. Busetta, W. Collmar, A. Connors, R. Diehl, L.O. Hanlon, J.W. den Herder, W. Hermsen, M. Kippen, L. Kuiper, G.G. Lichti, J.A. Lockwood, M. McConnell, D. Morris, J. Ryan, V. Schoenfelder, J.G. Stacy, H. Steinle, A.W. Strong, B.N. Swanenburg, B.G. Taylor, M. Varendorff, C. de Vries, and O.R. Williams, In: Gamma-Ray Bursts,AIP Conf. Proc. 265,Eds. W.R. Paciesas, and G.J. Fishman,Americ. Inst. of Physics,New York,77-81 (1992)
COMPTEL Observations of Gamma-Ray Bursts: Time Profiles and Spectra, W. Collmar, K. Bennett, H. Bloemen, H. de Boer, M. Busetta, A. Connors, R. Diehl, J. Greiner, L. Hanlon, J. W. den Herder, W. Hermsen, L. Kuiper, G. Lichti, J. Lockwood, J. Macri, M. McConnell, D. Morris, R. Much, J. Ryan, V. Schonfelder, J. G. Stacy, H. Steinle, A. W. Strong, B. Swanenburg, B. G. Taylor, M. Varendorff, C. de Vries, W. Webber, O. R. Williams, and C. Winkler. in Proc. of the Toulouse International Colloqium, A&A Suppl., 97 (1993) 71.
COMPTEL Observations of Gamma-Ray Bursts: Imaging and Localization, A. Connors, H. J. M. Arts, K. Bennett, H. Bloemen, H. de Boer, M. Busetta, W. Collmar, R. Diehl, R. van Dijk, L. Hanlon, J. W. den Herder, W. Hermsen, R. M. Kippen, L. Kuiper, A. Klumper, G. Lichti, J. Lockwood, J. Macri, M. McConnell, D. Morris, R. Much, J. Ryan, V. Schonfelder, G. Simpson, J. G. Stacy, H. Steinle, A. W. Strong, B. Swanenburg, B. Taylor, M. Varendorff, C. de Vries, W. Webber, O. R. Williams, and C. Winkler. in Proc. of the Toulouse International Colloqium, A&A Suppl., 97 (1993) 75.
COMPTEL detections of the quasars 3C273 and 3C279, W. Hermsen, H. J. M. Arts, K. Bennett, H. Bloemen, H. de Boer, W. Collmar, A. Connors, R. Diehl, R. van Dijk, L. Hanlon, J. W. den Herder, R. M. Kippen, L. Kuiper, G. Lichti, J. Lockwood, J. Macri, M. McConnell, D. Morris, J. Ryan, V. Schonfelder, G. Simpson, H. Steinle, A. W. Strong, B. Swanenburg, C. de Vries, W. Webber, O. R. Williams, and C. Winkler. in Proc. of the Toulouse International Colloqium, A&A Suppl., 97 (1993) 133.
COMPTEL Observations of AGN, H. Steinle, H. Bloemen, W. Collmar, R. Diehl, W. Hermsen, G. Lichti, M. McConnell, J. Ryan, V. Schonfelder, G. Stacy, A. W. Strong, B. N. Swanenburg, M. Varendorff, and O. R. Williams, in Proc. COSPAR World Space Congress, Washington 1992, Adv. Space Research, Vol. 13 No.12 (1993) 731.
COMPTEL Observations of Gamma-ray Bursts, A, Connors, W. Collmar, L. Hanlon, W. Hermsen, R. M. Kippen, L. Kuiper, M. McConnell, J. Ryan, V. Schonfelder, M. Varendorff, O. R. Williams, C.Winkler, Proc. COSPAR World Space Congress, Washington 1992, Adv. Space Research, Vol. 13 No.12 (1993) 715.
Search for Gamma-Ray Emission from AGN with COMPTEL, W. Collmar, K. Bennett, H. Bloemen, A. Connors, R. Diehl, D. Forrest, W. Hermsen, L. Kuiper, G. G. Lichti, M. McConnell, D. Morris, J. Ryan, V. Schonfelder, J.G. Stacy, H. Steinle, A. W. Strong, B. N. Swanenburg, M. Varendorff, C. de Vries, O. R. Williams, C. Winkler in Proc. of the COMPTON Observatory Symposium, St. Louis 1992, AIP Conf. Proc., 280 (1993) 483.
Gamma-ray Burst Studies by COMPTEL During its First Year of Operation, C. Winkler, K. bennett, L. Hanlon, O. R. Williams, W. Collmar, R. Diehl, V. Schonfelder, H. Steinle, M. Varendorff, J. W. den herder, W. Hermsen, L. Kuiper, B. N. Swanenburg, C. de Vries, A. Connors, D. Forrest, M. Kippen, M. McConnell, J. Ryan, in Proc. of the COMPTON Observatory Symposium, St. Louis 1992, AIP Conf. Proc., 280 (1993) 845.
Preliminary COMPTEL Results on the Quasar PKS 0528+134 W. Collmar, H. Bloemen K. Bennett, R. Diehl W. Hermsen, M. McConnell, G. G. Lichti, J. Ryan, V. Schoenfelder, J. G. Stacy, H. Steinle, A. W. Strong, O. R. Williams, In: Proc. of 23rd ICRC,Session OG 3.1,Vol. 1,p. 168, Calgary,Canada (1993) COMPTEL Observations of GRB 930131. M. Kippen, A. Connors, W. Collmar, J. Greiner L. O. Hanlon, G. G. Lichti, W. Hermsen, Kuiper,L., M. McConnell, J. Ryan, V. Schoenfelder, M. Varendorff, O. R. Williams, C. Winkler, In: Proc. of the 23rd ICRC,Session OG 2.2,Vol. 1,p. 85, Calgary,Canada (1993)
COMPTEL Observations of Gamma-Ray Bursts. M. Varendorff, A. Connors, W. Collmar, L. O. Hanlon, W. Hermsen, M. Kippen, Kuiper,L., M. McConnell, J. Ryan, V. Schoenfelder, O. R. Williams, C. Winkler, In: Proc. of 23rd ICRC,Session OG 2.2,Vol. 1,p. 81, Calgary,Canada (1993)
COMPTEL Observations of the Quasar PKS 0528+134. W. Collmar, K. Bennett, H. Bloemen R. Diehl W. Hermsen, M. McConnell, G. G. Lichti, J. Ryan, V. Schoenfelder, J. G. Stacy, H. Steinle, A. W. Strong, O. R. Williams, C. Winkler, In: Proc. of 2nd Compton Symposium,University of Maryland, College Park,MD 1993,AIP Conf. proc. 304,p. 659-663, eds. Carl E. Fichtel,Neil Gehrels,Jay P. Norris, AIP Press,New York
Simultaneous Observations of the Continuum Emission of the Quasar 3C 273 from Radio to Gamma-Ray Energies. G. G. Lichti, T. Balonek, T.J-L. Courvoisier, N. Johnson, M. McConnell, C. von Montigny, W. Paciesas, E.I. Robson, A. Sadun, C. Schalinski, A.G. Smith, R. Staubert, H., Steppe, B.N. Swanenburg, M.J.L. Turner, M.-H., Ulrich , and O. R. Williams, In: Proc. of 2nd Compton Symposium,University of Maryland, College Park,MD 1993,AIP Conf. proc. 304,p. 611-615, eds. Carl E. Fichtel,Neil Gehrels,Jay P. Norris, AIP Press,New York
COMPTEL Upper Limits for Seyfert Galaxies. Maisack,M., Barr,P., H. Bloemen W. Collmar, W. Hermsen, G. G. Lichti, M. McConnell, V. Schoenfelder, J. G. Stacy, H. Steinle, O. R. Williams, In: Proc. of 2nd Compton Symposium,University of Maryland, College Park,MD 1993,AIP Conf. proc. 304,p. 556-560, eds. Carl E. Fichtel,Neil Gehrels,Jay P. Norris, AIP Press,New York
Spectral Properties of Gamma-Ray Bursts Observed by COMPTEL. L. O. Hanlon, K. Bennett, O. R. Williams, C. Winkler, W. Collmar, R. Diehl J. Greiner V. Schoenfelder, H. Steinle, A. W. Strong, M. Varendorff, R. van Dijk, J.W. den Herder, W. Hermsen, Kuiper, L., A. Connors, M. Kippen, M. McConnell, J. Ryan, Gamma-Ray Bursts in: 2nd Workshop Huntsville,AL Oct. 1993, eds. Gerald J. Fishman,Jerome J. Brainerd,Kevin Hurley, AIP Conf. Proc. 307,p. 275-279
First Results of the BATSE/COMPTEL/NMSU Rapid Burst Response Campaign. M. Kippen, A. Connors, J. Macri, M. McConnell, J. Ryan, W. Collmar, J. Greiner, V. Schoenfelder, M. Varendorff, G.J. Fishman,, C. Meegan, C. Kouveliotou, B. McNamara, T. Harrison, W. Hermsen, L. Kuiper, L. O. Hanlon, O. R. Williams, C. Winkler, Gamma-Ray Bursts in: 2nd Workshop Huntsville,AL Oct. 1993, eds. Gerald J. Fishman,Jerome J. Brainerd,Kevin Hurley, AIP Conf. Proc. 307,p. 418-422 Simultaneous Observations of the Continuum Emission of the Quasar 3C 273 from Radio to Gamma-Ray Energies. G. G. Lichti, T. Balonek, T.J.-L. Courvoisier, N. Johnson, M. McConnell, C. von Montigny, W. Paciesas, E.I. Robson, A. Sadun, C. Schalinski, A.G. Smith, R. Staubert, H. Steppe, B.N. Swanenburg, M.J.L. Turner, M.-H. Ulrich, O. R. Williams, Proc. of the IAU Symposium 159,Genf,Aug./Sept. 1993, KLUWER Academic Publishers,eds. T.J.-L. Courvoisier & A. Blecha,S. 327,1994
Strong Gamma-Ray Bursts Observed by COMPTEL during its Second Year of Operation. M. Kippen, A. Connors, M. McConnell, J. Ryan, W. Collmar, J. Greiner V. Schoenfelder, M. Varendorff, W. Hermsen, Kuiper, L., K. Bennett, L. O. Hanlon, O. R. Williams, C. Winkler, COSPAR Hamburg 1994: Adv. Sp. Res., Vol....., p....... (1995)
Combined fitting of Ulysses/COMPTEL GRB spectra. T. Aigner, J. Greiner, M. Sommer, O.R. Williams, R.M. Kippen, K. Hurley, M. Boer, M. Niel, 1995 Ap&SS.231..165A
Spectral characterisation of gamma-ray bursts with COMPTEL and BATSE. L.O. Hanlon, K. Bennett, O.R. Williams, C. Winkler, R.D. Preece, 1995 Ap&SS.231..157H
COMPTEL analysis of GRB 940217. C. Winkler, K. Bennett, L.O. Hanlon, K.S. O'Flaherty, O.R. Williams, R.M. Kippen, J. Ryan, W. Collmar, V. Schonfelder, H. Steinle, W. Hermsen. 1995 Ap&SS.231..153W
Abstracts only
The Ginga observation of the dipping LMXB XB1916-053. K. Mukai, A.P. Smale, O.R. Williams. 1989xrbi....1..607S.
Ginga observations of the 50-min dipping X-ray binary XB 1916-053 A.P. Smale, K.O. Mason, O.R. Williams, M.G. Watson, 1989BAAS...21..713S
COMPTEL Gamma-ray Burst Observations M. Kippen, A. Connors, D. Forrest, M. McConnell, J. Ryan, W. Collmar, R. Diehl, V. Schoenfelder, H. Steinle, M. Varendorff, J.W. Den Herder, W. Hermsen, Kuiper, L., B.N. Swannenburg, C. de Vries, L. O. Hanlon, O. R. Williams, C. Winkler, 1992BAAS..181.7803K
CGRO COMPTEL Observations of AGNs J.G. Stacy, W. Collmar, R. Diehl, V. Schoenfelder, H. Steinle, A. Strong, J.W. Den Herder, W. Hermsen, B.N. Swannenburg, C. de Vries, M. McConnell, J. Ryan, K. Bennett, O. R. Williams, C. Winkler, 1992BAAS..181.2103S
COMPTEL Observations of AGN. C. Winkler, K. Bennett, O.R. Williams, W. Collmar, G. Lichti, V. Schonfelder, H. Steinle, H. Bloemen, H. Blom, W. Hermsen, M. McConnell, J. Ryan, J.G. Stacy. 1993BAAS..183.6407B
COMPTEL Observations of GRB 930131. M. Kippen, A. Connors, M. McConnell, J. Ryan, W. Collmar, J. Greiner, G. Lichti, V. Schoenfelder, M. Varendorff, W. Hermsen, Kuiper, L., L. O. Hanlon, O. R. Williams, C. Winkler, 1993BAAS..182.7403K