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The CLEO III Ring Imaging Cherenkov detector

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 409:1-3 (1998) 375-378

Authors:

M Artuso, F Azfar, A Efimov, D He, S Kopp, R Mountain, S Schuh, T Skwarnicki, S Stone, G Viehhauser, X Xing, S Anderson, Y Kubota, R Poling, A Smith, S Alam, S Timm, T Coan, V Fadeyev, J Staeck, I Volobouev, D Cinabro, L Perera

Abstract:

The CLEO detector is undergoing major improvements in conjunction with a high luminosity upgrade of the CESR e+e- collider. A novel element is a state of the art particle identification system, based on a proximity focused Ring Imaging Cherenkov detector. This detector will provide an excellent hadron identification at all the momenta relevant to the study of the decays of B mesons produced at the 违(4S) resonance. Some features unique to our design will be discussed together with some results achieved on individual components. 漏 1998 Elsevier Science B.V. All rights reserved.

The CLEO III Ring Imaging Cherenkov detector

NUCL INSTRUM METH A 409:1-3 (1998) 375-378

Authors:

M Artuso, F Azfar, A Efimov, D He, S Kopp, R Mountain, S Schuh, T Skwarnicki, S Stone, G Viehhauser, X Xing, S Anderson, Y Kubota, R Poling, A Smith, S Alam, S Timm, T Coan, V Fadeyev, J Staeck, I Volobouev, D Cinabro, L Perera

Abstract:

The CLEO detector is undergoing major improvements in conjunction with a high luminosity upgrade of the CESR e(+)e(-) collider. A novel element is a state of the art particle identification system, based on a proximity focused Ring Imaging Cherenkov detector. This detector will provide an excellent hadron identification at all the momenta relevant to the study of the decays of B mesons produced at the Upsilon(4S) resonance. Some features unique to our design will be discussed together with some results achieved on individual components. (C) 1998 Elsevier Science B.V. All rights reserved.

Infrared photometry and spectroscopy of the supersoft X-ray source RX J0019.8+2156 (= QR And)

(1998)

Authors:

H Quaintrell, RP Fender

Optical Follow-Up of GRB 970508

The Astrophysical Journal American Astronomical Society 497:1 (1998) l13-l16

Authors:

TJ Galama, PJ Groot, J van Paradijs, C Kouveliotou, RG Strom, RAMJ Wijers, N Tanvir, J Bloom, M Centurion, J Telting, RGM Rutten, P Smith, C Mackey, S Smartt, C Benn, J Heise, J in't Zand

The carbon abundance in main-sequence B-type stars towards the Galactic anti-centre

Astronomy and Astrophysics 332:2 (1998) 681-685

Authors:

RE Hibbins, PL Dufton, SJ Smartt, WRJ Rolleston

Abstract:

Differential carbon abundances (based on the C II doublet at 6580脜) are presented for eight early type stars, towards the Galactic anti-centre. All the stars have similar atmospheric parameters with effective temperatures in the range 25000 - 29000 K and surface gravities between logg = 3.9 - 4.3 dex. The derived photospheric abundances vary by up to 0.6 dex, and with the exception of one star, RLWT-41, the differential abundances are found to be closely correlated with those of nitrogen. This implies that both elements may have been formed by similar mechanisms and that the lack of correlation between the nitrogen and oxygen abundances previously found in this sample is not directly due to CNO-processed core material being mixed to the stellar surface.