The Experts below are selected from a list of 21 Experts worldwide ranked by ideXlab platform
J Gorosabel - One of the best experts on this subject based on the ideXlab platform.
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a multi Colour Study of the dark grb 000210 host galaxy and its environment
Web Science, 2003Co-Authors: J Gorosabel, L Christensen, J Hjorth, J P U Fynbo, H Pedersen, B L Jensen, M I Andersen, N LundAbstract:We present UBVRIZJsHKs broad band photometry of the host galaxy of the dark gamma-ray burst (GRB) of February 10, 2000. These observations represent the most exhaustive photometry given to date of any GRB host galaxy. A grid of spectral templates have been fitted to the Spectral Energy Distribution (SED) of the host. The derived photometric redshift is z = 0.842 +0.054 −0.042 , which is in excellent agreement with the spectroscopic redshift (z = 0.8463 ± 0.0002) proposed by Piro et al. (2002) based on a single emission line. Furthermore, we have determined the photometric redshift of all the galaxies in an area of 6 ' × 6 ' around the host galaxy, in order to check for their overdensity in the environment of the host. We find that the GRB 000210 host galaxy is a subluminous galaxy (L � 0.5 ± 0.2L ⋆ ), with no companions above our detection threshold of 0.18 ± 0.06L ⋆ . Based on the restframe ultraviolet flux a star formation rat e of 2.1 ± 0.2M⊙ yr −1 is estimated. The best fit to the SED is obtained for a starburst template with an age of 0.181 +0.037 −0.026 Gyr and a very low extinction (AV � 0). We discuss the implications of the inferred low value of AV and the age of the dominant stellar population for the non detection of the GRB 000210 optical afterglow.
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a multi Colour Study of the dark grb 000210 host galaxy and its environment
arXiv: Astrophysics, 2002Co-Authors: J Gorosabel, L Christensen, J Hjorth, J P U Fynbo, H Pedersen, B L Jensen, M I Andersen, N LundAbstract:We present UBVRIZJsHKs broad band photometry of the host galaxy of the dark gamma-ray burst (GRB) of February 10, 2000. These observations represent the most exhaustive photometry given to date of any GRB host galaxy. A grid of spectral templates have been fitted to the Spectral Energy Distribution (SED) of the host. The derived photometric redshift is z=0.842^+0.054_-0.042, which is in excellent agreement with the spectroscopic redshift (z=0.8463+/-0.0002) proposed by Piro et al. (2002) based on a single emission line. Furthermore, we have determined the photometric redshift of all the galaxies in an area of 6'x6' around the host galaxy, in order to check for their overdensity in the environment of the host. We find that the GRB 000210 host galaxy is a subluminous galaxy (L ~ 0.5+/-0.2 L*), with no companions above our detection threshold of 0.18+/-0.06 L*. Based on the restframe ultraviolet flux a star formation rate of 2.1+/-0.2 Solar Masses per year is estimated. The best fit to the SED is obtained for a starburst template with an age of 0.181^+0.037_-0.026 Gyr and a very low extinction (Av~0). We discuss the implications of the inferred low value of Av and the age of the dominant stellar population for the non detection of the GRB 000210 optical afterglow.
N Lund - One of the best experts on this subject based on the ideXlab platform.
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a multi Colour Study of the dark grb 000210 host galaxy and its environment
Web Science, 2003Co-Authors: J Gorosabel, L Christensen, J Hjorth, J P U Fynbo, H Pedersen, B L Jensen, M I Andersen, N LundAbstract:We present UBVRIZJsHKs broad band photometry of the host galaxy of the dark gamma-ray burst (GRB) of February 10, 2000. These observations represent the most exhaustive photometry given to date of any GRB host galaxy. A grid of spectral templates have been fitted to the Spectral Energy Distribution (SED) of the host. The derived photometric redshift is z = 0.842 +0.054 −0.042 , which is in excellent agreement with the spectroscopic redshift (z = 0.8463 ± 0.0002) proposed by Piro et al. (2002) based on a single emission line. Furthermore, we have determined the photometric redshift of all the galaxies in an area of 6 ' × 6 ' around the host galaxy, in order to check for their overdensity in the environment of the host. We find that the GRB 000210 host galaxy is a subluminous galaxy (L � 0.5 ± 0.2L ⋆ ), with no companions above our detection threshold of 0.18 ± 0.06L ⋆ . Based on the restframe ultraviolet flux a star formation rat e of 2.1 ± 0.2M⊙ yr −1 is estimated. The best fit to the SED is obtained for a starburst template with an age of 0.181 +0.037 −0.026 Gyr and a very low extinction (AV � 0). We discuss the implications of the inferred low value of AV and the age of the dominant stellar population for the non detection of the GRB 000210 optical afterglow.
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a multi Colour Study of the dark grb 000210 host galaxy and its environment
arXiv: Astrophysics, 2002Co-Authors: J Gorosabel, L Christensen, J Hjorth, J P U Fynbo, H Pedersen, B L Jensen, M I Andersen, N LundAbstract:We present UBVRIZJsHKs broad band photometry of the host galaxy of the dark gamma-ray burst (GRB) of February 10, 2000. These observations represent the most exhaustive photometry given to date of any GRB host galaxy. A grid of spectral templates have been fitted to the Spectral Energy Distribution (SED) of the host. The derived photometric redshift is z=0.842^+0.054_-0.042, which is in excellent agreement with the spectroscopic redshift (z=0.8463+/-0.0002) proposed by Piro et al. (2002) based on a single emission line. Furthermore, we have determined the photometric redshift of all the galaxies in an area of 6'x6' around the host galaxy, in order to check for their overdensity in the environment of the host. We find that the GRB 000210 host galaxy is a subluminous galaxy (L ~ 0.5+/-0.2 L*), with no companions above our detection threshold of 0.18+/-0.06 L*. Based on the restframe ultraviolet flux a star formation rate of 2.1+/-0.2 Solar Masses per year is estimated. The best fit to the SED is obtained for a starburst template with an age of 0.181^+0.037_-0.026 Gyr and a very low extinction (Av~0). We discuss the implications of the inferred low value of Av and the age of the dominant stellar population for the non detection of the GRB 000210 optical afterglow.
St James Kiara - One of the best experts on this subject based on the ideXlab platform.
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Longitudinal cohort of HIV-negative transgender women of Colour in New York City: protocol for the TURNNT ('Trying to Understand Relationships, Networks and Neighbourhoods among Transgender women of Colour') Study.
eScholarship University of California, 2020Co-Authors: Callander Denton, Schneider, John A, Radix Asa, Chaix Basile, Scheinmann Roberta, Love Gia, Smith Jordyn, Regan, Seann D, Kawachi Ichiro, St James KiaraAbstract:INTRODUCTION:In the USA, transgender women are among the most vulnerable to HIV. In particular, transgender women of Colour face high rates of infection and low uptake of important HIV prevention tools, including pre-exposure prophylaxis (PrEP). This paper describes the design, sampling methods, data collection and analyses of the TURNNT ('Trying to Understand Relationships, Networks and Neighbourhoods among Transgender women of Colour') Study. In collaboration with communities of transgender women of Colour, TURNNT aims to explore the complex social and environmental (ie, neighbourhood) structures that affect HIV prevention and other aspects of health in order to identify avenues for intervention. METHODS AND ANALYSES:TURNNT is a prospective cohort Study, which will recruit 300 transgender women of Colour (150 Black/African American, 100 Latina and 50 Asian/Pacific Islander participants) in New York City. There will be three waves of data collection separated by 6 months. At each wave, participants will provide information on their relationships, social and sexual networks, and neighbourhoods. Global position system technology will be used to generate individual daily path areas in order to estimate neighbourhood-level exposures. Multivariate analyses will be conducted to assess cross-sectional and longitudinal, independent and synergistic associations of personal relationships (notably individual social capital), social and sexual networks, and neighbourhood factors (notably neighbourhood-level social cohesion) with PrEP uptake and discontinuation. ETHICS AND DISSEMINATION:The TURNNT protocol was approved by the Columbia University Institutional Review Board (reference no. AAAS8164). This Study will provide novel insights into the relationship, network and neighbourhood factors that influence HIV prevention behaviours among transgender women of Colour and facilitate exploration of this population's health and well-being more broadly. Through community-based dissemination events and consultation with policy makers, this foundational work will be used to guide the development and implementation of future interventions with and for transgender women of Colour
St James K - One of the best experts on this subject based on the ideXlab platform.
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Longitudinal cohort of HIV-negative transgender women of Colour in New York City: Protocol for the TURNNT ('Trying to Understand Relationships, Networks and Neighbourhoods among Transgender women of Colour') Study
'BMJ', 2020Co-Authors: Callander D, Ja Schneider, Radix A, Chaix B, Scheinmann R, Love G, Smith J, Sd Regan, St James KAbstract:© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ. Introduction In the USA, transgender women are among the most vulnerable to HIV. In particular, transgender women of Colour face high rates of infection and low uptake of important HIV prevention tools, including pre-exposure prophylaxis (PrEP). This paper describes the design, sampling methods, data collection and analyses of the TURNNT ('Trying to Understand Relationships, Networks and Neighbourhoods among Transgender women of Colour') Study. In collaboration with communities of transgender women of Colour, TURNNT aims to explore the complex social and environmental (ie, neighbourhood) structures that affect HIV prevention and other aspects of health in order to identify avenues for intervention. Methods and analyses TURNNT is a prospective cohort Study, which will recruit 300 transgender women of Colour (150 Black/African American, 100 Latina and 50 Asian/Pacific Islander participants) in New York City. There will be three waves of data collection separated by 6 months. At each wave, participants will provide information on their relationships, social and sexual networks, and neighbourhoods. Global position system technology will be used to generate individual daily path areas in order to estimate neighbourhood-level exposures. Multivariate analyses will be conducted to assess cross-sectional and longitudinal, independent and synergistic associations of personal relationships (notably individual social capital), social and sexual networks, and neighbourhood factors (notably neighbourhood-level social cohesion) with PrEP uptake and discontinuation. Ethics and dissemination The TURNNT protocol was approved by the Columbia University Institutional Review Board (reference no. AAAS8164). This Study will provide novel insights into the relationship, network and neighbourhood factors that influence HIV prevention behaviours among transgender women of Colour and facilitate exploration of this population's health and well-being more broadly. Through community-based dissemination events and consultation with policy makers, this foundational work will be used to guide the development and implementation of future interventions with and for transgender women of Colour
J P U Fynbo - One of the best experts on this subject based on the ideXlab platform.
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a multi Colour Study of the dark grb 000210 host galaxy and its environment
Web Science, 2003Co-Authors: J Gorosabel, L Christensen, J Hjorth, J P U Fynbo, H Pedersen, B L Jensen, M I Andersen, N LundAbstract:We present UBVRIZJsHKs broad band photometry of the host galaxy of the dark gamma-ray burst (GRB) of February 10, 2000. These observations represent the most exhaustive photometry given to date of any GRB host galaxy. A grid of spectral templates have been fitted to the Spectral Energy Distribution (SED) of the host. The derived photometric redshift is z = 0.842 +0.054 −0.042 , which is in excellent agreement with the spectroscopic redshift (z = 0.8463 ± 0.0002) proposed by Piro et al. (2002) based on a single emission line. Furthermore, we have determined the photometric redshift of all the galaxies in an area of 6 ' × 6 ' around the host galaxy, in order to check for their overdensity in the environment of the host. We find that the GRB 000210 host galaxy is a subluminous galaxy (L � 0.5 ± 0.2L ⋆ ), with no companions above our detection threshold of 0.18 ± 0.06L ⋆ . Based on the restframe ultraviolet flux a star formation rat e of 2.1 ± 0.2M⊙ yr −1 is estimated. The best fit to the SED is obtained for a starburst template with an age of 0.181 +0.037 −0.026 Gyr and a very low extinction (AV � 0). We discuss the implications of the inferred low value of AV and the age of the dominant stellar population for the non detection of the GRB 000210 optical afterglow.
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a multi Colour Study of the dark grb 000210 host galaxy and its environment
arXiv: Astrophysics, 2002Co-Authors: J Gorosabel, L Christensen, J Hjorth, J P U Fynbo, H Pedersen, B L Jensen, M I Andersen, N LundAbstract:We present UBVRIZJsHKs broad band photometry of the host galaxy of the dark gamma-ray burst (GRB) of February 10, 2000. These observations represent the most exhaustive photometry given to date of any GRB host galaxy. A grid of spectral templates have been fitted to the Spectral Energy Distribution (SED) of the host. The derived photometric redshift is z=0.842^+0.054_-0.042, which is in excellent agreement with the spectroscopic redshift (z=0.8463+/-0.0002) proposed by Piro et al. (2002) based on a single emission line. Furthermore, we have determined the photometric redshift of all the galaxies in an area of 6'x6' around the host galaxy, in order to check for their overdensity in the environment of the host. We find that the GRB 000210 host galaxy is a subluminous galaxy (L ~ 0.5+/-0.2 L*), with no companions above our detection threshold of 0.18+/-0.06 L*. Based on the restframe ultraviolet flux a star formation rate of 2.1+/-0.2 Solar Masses per year is estimated. The best fit to the SED is obtained for a starburst template with an age of 0.181^+0.037_-0.026 Gyr and a very low extinction (Av~0). We discuss the implications of the inferred low value of Av and the age of the dominant stellar population for the non detection of the GRB 000210 optical afterglow.