Building Integrated Photovoltaic System for a Solar Infrastructure: Liv-lib' Project

Abstract The growing importance of sustainability and passive house design requires the reconsideration of integrating the solar PV modules in both buildings and architectural design processes. The architectural integration of photovoltaic systems is one of the fundamental themes of contemporary architecture to optimize efficiency while taking into account the proportions, morphology and aesthetics of the project. The direct conversion of solar energy into electrical energy using photovoltaic systems appears to be a consolidated technology of exploitation of renewable energy sources. In addition to the availability of the source, its characteristics are its reliability and that it needs low maintenance. In this paper, we present, as a case study, a solar canopy specially designed for the Liv-lib' project at Solar Decathlon Europe 2014. Canopy's shape was designed to maximize the performance of the solar conversion by integrating in series two innovative solar technologies, Luminescent Solar Concentrators (LSC) and Copper Indium Gallium diSelenide (CIGS) solar cells. LSC are constituted by slabs of transparent materials (PMMA) doped with a fluorescent dye that captures a fraction of the sun rays passing through the panel. The dye molecules then re-emit light at a longer wavelength inside the slab which, due to the total internal reflection, traps and guides this light toward its edges. Strips of solar cells are optically coupled to the edges and convert into electric energy the light gathered by the slab. Liv-lib' is a self-sustainable passive house run by University Paris-Est, thanks to the joint work of staff and students from "ENSA Paris-Malaquais", "ESTP", "ESIEE Paris", and "Chimie ParisTech" with academic and industrial partners, among which, for the LSC, the Department of Physics and Earth Sciences of the University of Ferrara

LIGO/Virgo S191204r: GRAWITA VST-ESO PARANAL transient candidates discovery

We report the results of the observation of the field of the gravitational wave event S191204r (GCN circular #26334) obtained with the VLT Survey Telescope (VST) equipped with Omegacam (described in GCN 26334, Proposal ID ESO 0104.D-0049). Images were analised using our image difference pipelines (Brocato et al. 2018 MNRAS, 474,1). As reference images we used DECAM archive images retrieved from https://datalab.noao.edu/sia/des_dr1. The final vetting was done via visual inspection. We detected the following three interesting candidates: Name | RA | Dec | MJD | Mag VSTJ044435.43-332755.7 | 04:44:35.432 | -33:27:55.69 | 58222.081 | 21.5 +/- 0.1 VSTJ051111.58-373132.0 | 05:11:11.576 | -37:31:32.04 | 58822.079 | 20.6 +/- 0.1 VSTJ051052.17-335413.9 | 05:10:52.168 | -33:54:13.95 | 58823.140 | 22.2 +/- 0.2 The transients were detected at multiple epochs. Here we report epoch and magnitude for the brightest detection. All the transients appear projected near a galaxy. In particular GWd_S191205r_12093 is located 7.4 arcsec from the nucleus of GLADE131392 which distance is 178Mpc (GLADE catalog). The small distance appears to exclude that this transient is related to the GW event. -- Too short? See why http://www.emailcharter.org/ >>>>>>>>>>>>>>>>>>>> Aniello Grado, PhD Ricercatore Astronomo INAF- Osservatorio Astronomico di Capodimonte Via Moiariello 16 80131 Napoli ITALIA Tel: 0039 0815575547 Fax: 0039 0815575433 >>>>>>>>>>>>>>>>>>>

LIGO/Virgo S191204r: correction to GRAWITA GCN 26390

We realised that the text of GCN 26390 was submitted while still incomplete. The correct text is the following: We report the results of the observation of the field of the gravitational wave event S191204r (GCN 26334) obtained with the VLT Survey Telescope (VST) equipped with Omegacam (described in GCN 26334, Proposal ID ESO 0104.D-0049). Images were analised using our image difference pipelines (Brocato et al. 2018 MNRAS, 474,1). As reference images we used DECAM archive images retrieced from https://datalab.noao.edu/sia/des_dr1 . The final vetting was done via visual inspection. We detected the following three interesting candidates: Name | RA | Dec | MJD | Mag VSTJ044435.43-332755.7 | 04:44:35.432 | -33:27:55.69 | 58222.081 | 21.5 +/- 0.1 VSTJ051111.58-373132.0 | 05:11:11.576 | -37:31:32.04 | 58822.079 | 20.6 +/- 0.1 VSTJ051052.17-335413.9 | 05:10:52.168 | -33:54:13.95 | 58823.140 | 22.2 +/- 0.2 The transients were detected at multiple epochs. Here we report epoch and magnitude for the brightest detection. All the transients appear projected near a galaxy. In particular VSTJ051111.58-373132.0 is located 7.4 arcsec from the nucleus of GLADE131392 which distance is 178Mpc (GLADE catalog). The small distance appears to exclude that this transient is related to the GW event. For the other two galaxies the distance is unknown. In the next days, a fourth observation epoch with the VST is scheduled to check for the transient luminosity evolution. We apologise for any confusion

LIGO/Virgo S191213g: GRAWITA TNG NIR imaging of AT2019wxt (PS19hgw)

We obtained NIR observations of the faint transient AT2019wxt (PS19hgw; McBrien et al., GCN Circ. 26485), possibly associated with the gravitational wave event S191213g (LVC, GCN Circ. 26402), with the 3.58m TNG telescope equipped with NICS in imaging mode. A series of images were obtained with the J filter on 2019-12-18 from 19:16:04 to 19:59:02 UT (i.e. about 5.6 days after the GW event). The transient is clearly detected with a magnitude J(AB) = 19.6 +/- 0.1 (obtained from preliminary psf photometry calibrated against the 2MASS catalogue and subtracting the host galaxy contribution). [GCN OPS NOTE(19dec19): Per author's request, the Circular reference in the first line was changed from 26845 to 26485.

Lunar Gravitational-Wave Antenna

Monitoring of vibrational eigenmodes of an elastic body excited by gravitational waves was one of the first concepts proposed for the detection of gravitational waves. At laboratory scale, these experiments became known as resonant-bar detectors first developed by Joseph Weber in the 1960s. Due to the dimensions of these bars, the targeted signal frequencies were in the kHz range. Weber also pointed out that monitoring of vibrations of Earth or Moon could reveal gravitational waves in the mHz band. His Lunar Surface Gravimeter experiment deployed on the Moon by the Apollo 17 crew had a technical failure rendering the data useless. In this article, we revisit the idea and propose a Lunar Gravitational-Wave Antenna (LGWA). We find that LGWA could become an important partner observatory for joint observations with the space-borne, laser-interferometric detector LISA, and at the same time contribute an independent science case due to LGWA's unique features. Technical challenges need to be overcome for the deployment of the experiment, and development of inertial vibration sensor technology lays out a future path for this exciting detector concept.Comment: 29 pages, 17 figure

Unveiling the enigma of ATLAS17aeu

Aims: The unusual transient ATLAS17aeu was serendipitously detected within the sky localisation of the gravitational wave trigger GW 170104. The importance of a possible association with gravitational waves coming from a binary black hole merger led to an extensive follow-up campaign, with the aim of assessing a possible connection with GW 170104. Methods: With several telescopes, we carried out both photometric and spectroscopic observations of ATLAS17aeu, for several epochs, between ∼3 and ∼230 days after the first detection. Results: We studied in detail the temporal and spectroscopic properties of ATLAS17aeu and its host galaxy. Although at low significance and not conclusive, we found similarities to the spectral features of a broad-line supernova superposed onto an otherwise typical long-GRB afterglow. Based on analysis of the optical light curve, spectrum, and host galaxy spectral energy distribution, we conclude that the redshift of the source is probably z ≃ 0.5 ± 0.2. Conclusions: While the redshift range we have determined is marginally compatible with that of the gravitational wave event, the presence of a supernova component and the consistency of this transient with the Ep-Eiso correlation support the conclusion that ATLAS17aeu was associated with the long gamma-ray burst GRB 170105A. This rules out the association of the GRB 170105A/ATLAS17aeu transient with the gravitational wave event GW 170104, which was due to a binary black hole merger. Based on observations made with the following telescopes: Copernico, TNG (under programme A34TAC_24), GTC (under programmes GTCMULTIPLE2D-16B and GTCMULTIPLE2G-17A), LBT (under programme 2016_2017_19), and HST (under programme GO14270).Spectral data for this source shown on this paper are available on the Weizmann Interactive Supernova Data Repository (WISeREP, http://https://wiserep.weizmann.ac.il/)

Supplement: "Localization and broadband follow-up of the gravitational-wave transient GW150914" (2016, ApJL, 826, L13)

This Supplement provides supporting material for Abbott et al. (2016a). We briefly summarize past electromagnetic (EM) follow-up efforts as well as the organization and policy of the current EM follow-up program. We compare the four probability sky maps produced for the gravitational-wave transient GW150914, and provide additional details of the EM follow-up observations that were performed in the different bands

GRAWITA: VLT Survey Telescope observations of the gravitational wave sources GW150914 and GW151226

We report the results of deep optical follow-up surveys of the first two gravitational-wave sources, GW150914 and GW151226, done by the GRAvitational Wave Inaf TeAm Collaboration (GRAWITA). The VLT Survey Telescope (VST) responded promptly to the gravitational wave alerts sent by the LIGO and Virgo Collaborations, monitoring a region of 90 and 72 deg2 for GW150914 and GW151226, respectively, and repeated the observations over nearly two months. Both surveys reached an average limiting magnitude of about 21 in the r band. The paper describes the VST observational strategy and two independent procedures developed to search for transient counterpart candidates in multi-epoch VST images. Several transients have been discovered but no candidates are recognized to be related to the gravitational wave events. Interestingly, among many contaminant supernovae, we find a possible correlation between the supernova VSTJ57.77559-59.13990 and GRB 150827A detected by Fermi-GBM. The detection efficiency of VST observations for different types of electromagnetic counterparts of gravitational wave events is evaluated for the present and future follow-up surveys

La necropoli di San Giuliano: note sulla topografia e sull'architettura funeraria del sepolcreto di San Simone (Barbarano Romano, VT)

Here is a general overview of topography and funerary architecture of the Etruscan necropolis of San Simone in Barbarano Romano (VT). Development takes a long time from the orientalizing age to the Hellenistic age. The monumental tombs are represented here by important examples that contribute to outline the evolution of architectural typologies, not only in the center of San Giuliano but also in southern Etruria