The ISOCAM Camera Long Wavelength Channel Detector

Agnèse, P.; Lucas, C.; Maillart, Patrick; Mottier, P.; Lepennec, Y.; Massé, Pierre

doi:10.1117/12.952500

Cited by 4 publications

(3 citation statements)

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“…The proper length along z i becomes neither shrinking nor expanding as ρ approaches to K if the i-th tension takes a specific value which is determined by the values of other tensions as in Eq. (15). The regular spatial geometry in all extra p-dimensions happens only for the Schwarzschild black p-brane and Kaluza-Klein bubble solutions.…”

Section: Discussionmentioning

confidence: 99%

“…Higher dimensional spacetime solutions having translational symmetry along extra dimensions and spherical symmetry on slices perpendicular to them have been discovered by many authors in the literature in different contexts [10,11,12,13,14,15]. For instance, much more general solutions even in the presence of dilatonic scalar fields and antisymmetric forms were found in Refs.…”

Section: Introductionmentioning

confidence: 99%

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Geometrical properties of the trans-spherical solutions in higher dimensions

2009

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We investigate the geometrical properties of static vacuum p-brane solutions of Einstein gravity in D = n+p+3 dimensions, which have spherical symmetry of S n+1 orthogonal to the p-directions and are invariant under the translation along them. The solutions are characterized by mass density and p number of tension densities. The causal structure of the higher dimensional solutions is essentially the same as that of the five dimensional ones. Namely, a naked singularity appears for most solutions except for the Schwarzschild black p-brane and the Kaluza-Klein bubble. We show that some important geometric properties such as the area of S n+1 and the total spatial volume are characterized only by the three parameters such as the mass density, the sum of tension densities and the sum of tension density squares rather than individual tension densities. These geometric properties are analyzed in detail in this parameter space and are compared with those of 5-dimensional case.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Geometrical properties of the trans-spherical solutions in higher dimensions

2009

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“…The filter wheel of this channel contains 10 broad band filters and two Continuously Variable Filters (CVF). The detector is a single crystal made of Si:Ga photo-conductor connected by Indium bumps to direct voltage readout circuits (Agnèse et al 1989;Cesarsky 1992). 32 × 32 square pixels are electrically defined with a pitch of 100 µm.…”

Section: Introductionmentioning

confidence: 99%

Transient correction of the LW-ISOCAM data for low contrasted illumination

Coulais

Abergel

2000

Astron. Astrophys. Suppl. Ser.

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Abstract. The detector of the Long Wavelength channel of the ISOCAM camera on-board the Infrared Space Observatory (ISO) presents systematic memory effects of the response which can bias the photometry by a factor as high as 40%. We show that, for uniform illumination, the non linear model developed by Fouks and Schubert (1995) for the detector of PHT-S channel of the ISOPHOT instrument allows us to describe the LW-ISOCAM response to upward and downward steps of flux with an accuracy better than 1%. For each pixel of the detector, only two parameters have to be used. These parameters are constant over the whole life of ISO. On the other hand, spatial variations from pixel to pixel are significant.We present an inversion method of the Fouks-Schubert model. Without any fitting and for low contrasted illumination, data are corrected with a photometric accuracy of ∼ 1%, which is typically ten times better than previous methods. We suggest that the same approach could be used for others ISO detectors, and in the future for other experiments.

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High-performance detector read-out at very low temperatures

Eggel

Schaap

1992

Electron. Commun. Eng. J.

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The ISOCAM Camera Long Wavelength Channel Detector

Cited by 4 publications

References 0 publications

Geometrical properties of the trans-spherical solutions in higher dimensions

Geometrical properties of the trans-spherical solutions in higher dimensions

Transient correction of the LW-ISOCAM data for low contrasted illumination

High-performance detector read-out at very low temperatures

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