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7 results on '"Sand D"'

1. Las Cumbres Observatory Global Telescope Network

Author

Brown, T. M., Baliber, N., Bianco, F. B., Bowman, M., Burleson, B., Conway, P., Crellin, M., Depagne, É., De Vera, J., Dilday, B., Dragomir, D., Dubberley, M., Eastman, J. D., Elphick, M., Falarski, M., Foale, S., Ford, M., Fulton, B. J., Garza, J., Gomez, E. L., Graham, M., Greene, R., Haldeman, B., Hawkins, E., Haworth, B., Haynes, R., Hidas, M., Hjelstrom, A. E., Howell, D. A., Hygelund, J., Lister, T. A., Lobdill, R., Martinez, J., Mullins, D. S., Norbury, M., Parrent, J., Paulson, R., Petry, D. L., Pickles, A., Posner, V., Rosing, W. E., Ross, R., Sand, D. J., Saunders, E. S., Shobbrook, J., Shporer, A., Street, R. A., Thomas, D., Tsapras, Y., Tufts, J. R., Valenti, S., Vander Horst, K., Walker, Z., White, G., and Willis, M.

Abstract

Las Cumbres Observatory Global Telescope (LCOGT) is a young organization dedicated to time-domain observations at optical and (potentially) near-IR wavelengths. To this end, LCOGT is constructing a worldwide network of telescopes, including the two 2 m Faulkes telescopes, as many as 17 × 1 m telescopes, and as many as 23 × 40 cm telescopes. These telescopes initially will be outfitted for imaging and (excepting the 40 cm telescopes) spectroscopy at wavelengths between the atmospheric UV cutoff and the roughly 1-?m limit of silicon detectors. Since the first of LCOGT's 1 m telescopes are now being deployed, we lay out here LCOGT's scientific goals and the requirements that these goals place on network architecture and performance, we summarize the network's present and projected level of development, and we describe our expected schedule for completing it. In the bulk of the paper, we describe in detail the technical approaches that we have adopted to attain desired performance. In particular, we discuss our choices for the number and location of network sites, for the number and sizes of telescopes, for the specifications of the first generation of instruments, for the software that will schedule and control the network's telescopes and reduce and archive its data, and for the structure of the scientific and educational programs for which the network will provide observations.

Published
2013
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2. Positional isomerism of unsaturated fatty acids in the rat quantification of isomeric mixtures

Author

Sand, D., Sen, N., and Schlenk, H.

Abstract

Abstract: Mono- and dienoic acids of lipids from rat milk, rat sucklings, and rats on a fat-deficient diet were investigated. The percentage of uncommon isomers of palmitoleic acid was highest in milk, the newborn and the suckling rats, but receded after weaning. Isomers of linoleic acid were found only in traces in sucklings but became pronounced in rats on diets lacking essential fatty acids. The proportion of 8,11-diene among octadecadienoic acids increased markedly under such conditions within one week and two additional isomers became prominent after longer periods of fat-deficient diet. A supplement of hydrogenated coconut fat did not influence the occurrence of these isomers.Dietary petroselinic acid is incorporated by the rat into tissue lipids. 4-Hexadecenoic and a small amt of 8-eicosenoic acid arise from it. Quantification of isomeric mixtures by ozonization-hydrogenation and subsequent gas-liquid chromatography is discussed in detail.

Published
1965
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3. Abstracts of papers Minneapolis Fall Meeting

Author

Litchfield, C. C., Rakoff, Henry, Maire, Ren?, Holman, R. T., Subbaram, M. R., Youngs, C. G., McCarthy, M. J., Kuksis, A., Trowbridge, J. R., Herrick, A. B., Bauman, R. A., Craig, B. M., Bhatty, M. K., Sen, N., Schlenk, H., Gellerman, J. L., Emken, E. A., Butterfield, R. O., Blank, M. L., Farquhar, Margaret, Reiser, Raymond, Luddy, F. E., Barford, R. A., Herb, S. F., Riemenschneider, R. W., Peifer, J. J., Muesing, R., Janssen, F., Schmit, J. A., Buchnea, Dmytro, Dufek, E. J., DeJarlais, W. J., Feuge, R. O., Zarins, Zigrida, Kircher, H. W., Johnston, A. E., Glass, C. A., Schmolka, I. R., Cenker, M., Kokorudz, M., Mangold, H. K., Houle, C. R., Bistline, R. G., Stirton, A. J., Berglund, E. D., Crecelius, S. B., Cohen, Irving, Economou, Peter, Spangler, W. G., Watanabe, Henry, Groves, W. L., Netzel, D. A., Stanley, C. W., Rathburn, D. W., Reck, R. A., Molnar, N. M., Baron, S., Horning, E. C., Holmes, W. L., Hamilton, J. G., Muldrey, J. E., Goldsmith, Grace A., Shulman, G. P., Link, W. E., Lew, H. Y., Desmond, C. T., Borden, W. T., Gildenberg, L., Lundgren, D. P., Keily, H. J., Knaggs, E. A., Varenyi, L., Yeager, J. A., Fischer, E., Weil, J. K., Stirton, A. J., Morrisroe, J., Atwood, R. W., Temple, R. E., Malins, D. C., Wekell, J. C., Morrissette, R. A., Ven Horst, Helen, Rohwedder, W. K., Selke, E., Scholfield, C. R., Tulloch, A. P., Schmid, H. H. O., Lundberg, W. O., Harris, J. A., Magne, F. C., Skau, E. L., Mehrens, J. E., Smullin, C. F., Cooper, A. D., Tuna, N., Heimberg, M., Fizette, N. B., Klausner, H., Horning, M., Mayer, S. E., Swoboda, P. A. T., Lea, C. H., Chipault, J. R., Mizuno, G. R., Anderson, R. H., Huntley, T. E., Moser, Helen A., Evans, C. D., Kwolek, W. F., Hill, F. D., Hammond, E. G., Pohle, W. D., Gregory, R. L., Van Giessen, B., Pohle, W. D., Weiss, T. J., Taylor, J. R., Ahern, J. J., Rolker, J. H., Rheineck, A. E., Shulman, Sol, Brand, B. G., Schoen, H. O., Gast, L. E., Cowan, J. C., Peng, S. C. S., Wood, D. L., Hopper, L. L., Dollear, F. G., Zimmerman, D. D., Therriault, D. G., Taylor, J. F., Westphal, U., Mullen, J. D., Smith, D. E., Riser, G. R., Bloom, F. W., Witnauer, L. P., Mod, R. R., Magne, F. C., Bell, E. W., Friedrich, J. P., Gast, L. E., Maerker, G., Haeberer, E. T., Ault, W. C., Kenney, H. E., Komanowsky, Daria, Wrigley, A. N., Eisner, Abner, Perlstein, Theodore, Beal, R. E., Fitton, P., Pryde, E. H., Mayland, B. J., Harvin, R. L., Trimarke, C. R., Frankel, E. N., Davison, V. L., Emken, E., Mabrouk, A. F., Selke, E., Rohwedder, W. K., Lavery, H., Oakley, H. B., Lovegren, N. V., Bradshaw, B., Scott, W. E., Krewson, C. F., Oswald, J., Crauer, L. S., Pennington, H., Carter, Fairie Lyn, Frampton, V. L., McGhee, J. E., Kirk, L. D., Mustakas, G. C., Scott, W. E., Griffin, E. L., Allen, L. E., Smith, O. B., Downey, R. K., Black, L. T., Jurbergs, K. A., Dowling, D. J., Szutowicz, Walter, McKillican, Mary E., Bell, J. M., Rahm, J. J., Kaunitz, Hans, Johnson, Ruth Ellen, Blank, Merle, Privett, O. S., Mahadevan, V., Cubero, E., Lundberg, W. O., Sand, D., and Feldman, G. L.

Published
1963
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4. Positional isomerism of unsaturated fatty acids in the rat quantification of isomeric mixtures

Author

Sand, D., Sen, N., and Schlenk, H.

Abstract

Mono- and dienoic acids of lipids from rat milk, rat sucklings, and rats on a fat-deficient diet were investigated. The percentage of uncommon isomers of palmitoleic acid was highest in milk, the newborn and the suckling rats, but receded after weaning. Isomers of linoleic acid were found only in traces in sucklings but became pronounced in rats on diets lacking essential fatty acids. The proportion of 8,11-diene among octadecadienoic acids increased markedly under such conditions within one week and two additional isomers became prominent after longer periods of fat-deficient diet. A supplement of hydrogenated coconut fat did not influence the occurrence of these isomers. Dietary petroselinic acid is incorporated by the rat into tissue lipids. 4-Hexadecenoic and a small amt of 8-eicosenoic acid arise from it. Quantification of isomeric mixtures by ozonization-hydrogenation and subsequent gas-liquid chromatography is discussed in detail.

Published
1965
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5. Abstracts of papers Minneapolis Fall Meeting

Author

Litchfield, C., Rakoff, Henry, Maire, René, Holman, R., Subbaram, M., Youngs, C., McCarthy, M., Kuksis, A., Trowbridge, J., Herrick, A., Bauman, R., Craig, B., Bhatty, M., Sen, N., Schlenk, H., Gellerman, J., Emken, E., Butterfield, R., Blank, M., Farquhar, Margaret, Reiser, Raymond, Luddy, F., Barford, R., Herb, S., Riemenschneider, R., Peifer, J., Muesing, R., Janssen, F., Schmit, J., Buchnea, Dmytro, Dufek, E., DeJarlais, W., Feuge, R., Zarins, Zigrida, Kircher, H., Johnston, A., Glass, C., Schmolka, I., Cenker, M., Kokorudz, M., Mangold, H., Houle, C., Bistline, R., Stirton, A., Berglund, E., Crecelius, S., Cohen, Irving, Economou, Peter, Spangler, W., Watanabe, Henry, Groves, W., Netzel, D., Stanley, C., Rathburn, D., Reck, R., Molnar, N., Baron, S., Horning, E., Holmes, W., Hamilton, J., Muldrey, J., Goldsmith, Grace, Shulman, G., Link, W., Lew, H., Desmond, C., Borden, W., Gildenberg, L., Lundgren, D., Keily, H., Knaggs, E., Varenyi, L., Yeager, J., Fischer, E., Weil, J., Stirton, A., Morrisroe, J., Atwood, R., Temple, R., Malins, D., Wekell, J., Morrissette, R., Ven Horst, Helen, Rohwedder, W., Selke, E., Scholfield, C., Tulloch, A., Schmid, H., Lundberg, W., Harris, J., Magne, F., Skau, E., Mehrens, J., Smullin, C., Cooper, A., Tuna, N., Heimberg, M., Fizette, N., Klausner, H., Horning, M., Mayer, S., Swoboda, P., Lea, C., Chipault, J., Mizuno, G., Anderson, R., Huntley, T., Moser, Helen, Evans, C., Kwolek, W., Hill, F., Hammond, E., Pohle, W., Gregory, R., Van Giessen, B., Pohle, W., Weiss, T., Taylor, J., Ahern, J., Rolker, J., Rheineck, A., Shulman, Sol, Brand, B., Schoen, H., Gast, L., Cowan, J., Peng, S., Wood, D., Hopper, L., Dollear, F., Zimmerman, D., Therriault, D., Taylor, J., Westphal, U., Mullen, J., Smith, D., Riser, G., Bloom, F., Witnauer, L., Mod, R., Magne, F., Bell, E., Friedrich, J., Gast, L., Maerker, G., Haeberer, E., Ault, W., Kenney, H., Komanowsky, Daria, Wrigley, A., Eisner, Abner, Perlstein, Theodore, Beal, R., Fitton, P., Pryde, E., Mayland, B., Harvin, R., Trimarke, C., Frankel, E., Davison, V., Emken, E., Mabrouk, A., Selke, E., Rohwedder, W., Lavery, H., Oakley, H., Lovegren, N., Bradshaw, B., Scott, W., Krewson, C., Oswald, J., Crauer, L., Pennington, H., Carter, Fairie, Frampton, V., McGhee, J., Kirk, L., Mustakas, G., Scott, W., Griffin, E., Allen, L., Smith, O., Downey, R., Black, L., Jurbergs, K., Dowling, D., Szutowicz, Walter, McKillican, Mary, Bell, J., Rahm, J., Kaunitz, Hans, Johnson, Ruth, Blank, Merle, Privett, O., Mahadevan, V., Cubero, E., Lundberg, W., Sand, D., and Feldman, G.

Published
1963
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6. Carnegie Supernova Project-II: The Near-infrared Spectroscopy ProgramThis paper includes data gathered with the 6.5-m Magellan telescopes at Las Campanas Observatory, Chile.

Author

Hsiao, E. Y., Phillips, M. M., Marion, G. H., Kirshner, R. P., Morrell, N., Sand, D. J., Burns, C. R., Contreras, C., Hoeflich, P., Stritzinger, M. D., Valenti, S., Anderson, J. P., Ashall, C., Baltay, C., Baron, E., Banerjee, D. P. K., Davis, S., Diamond, T. R., Folatelli, G., Freedman, Wendy L., Förster, F., Galbany, L., Gall, C., González-Gaitán, S., Goobar, A., Hamuy, M., Holmbo, S., Kasliwal, M. M., Krisciunas, K., Kumar, S., Lidman, C., Lu, J., Nugent, P. E., Perlmutter, S., Persson, S. E., Piro, A. L., Rabinowitz, D., Roth, M., Ryder, S. D., Schmidt, B. P., Shahbandeh, M., Suntzeff, N. B., Taddia, F., Uddin, S., and Wang, L.

Abstract

Shifting the focus of Type Ia supernova (SN Ia) cosmology to the near infrared (NIR) is a promising way to significantly reduce the systematic errors, as the strategy minimizes our reliance on the empirical width-luminosity relation and uncertain dust laws. Observations in the NIR are also crucial for our understanding of the origins and evolution of these events, further improving their cosmological utility. Any future experiments in the rest-frame NIR will require knowledge of the SN Ia NIR spectroscopic diversity, which is currently based on a small sample of observed spectra. Along with the accompanying paper, Phillips et al., we introduce the Carnegie Supernova Project-II (CSP-II), to follow-up nearby SNe Ia in both the optical and the NIR. In particular, this paper focuses on the CSP-II NIR spectroscopy program, describing the survey strategy, instrumental setups, data reduction, sample characteristics, and future analyses on the data set. In collaboration with the Harvard-Smithsonian Center for Astrophysics (CfA) Supernova Group, we obtained 661 NIR spectra of 157 SNe Ia. Within this sample, 451 NIR spectra of 90 SNe Ia have corresponding CSP-II follow-up light curves. Such a sample will allow detailed studies of the NIR spectroscopic properties of SNe Ia, providing a different perspective on the properties of the unburned material; the radioactive and stable nickel produced; progenitor magnetic fields; and searches for possible signatures of companion stars.

Published
2019
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