A dataset provided by the European Space Agency

Proposal ID 0520071
Obs ID 05200710001, 05200710002, 05200710003, 05200710004, 05200710005, 05200710006, 05200710007, 05200710008, 05200710009, 05200710010, 05200710011, 05200710012, 05200710013, 05200710014, 05200710015, 05200710016, 05200710017, 05200710018, 05200710019, 05200710020, 05200710021, 05200710022, 05200710023, 05200710024, 05200710025, 05200710026, 05200710027, 05200710028, 05200710029, 05200710030, 05200710031, 05200710032, 05200710033, 05200710035
Title Dissecting the Milky Way II: Stellar Ridge, Cosmic Rays, Annihilation Radiation, Nucleosynthesis
Download Data Associated to the proposal https://isla.esac.esa.int/tap/download/bundle?format=ascii_curl&product_id=prop_id:0520071
DOI https://doi.org/10.57780/esa-vwutbd9
Author Sunyaev
Abstract This proposal is a continuation of the on-going (AO4) program of making a several Msec long series of multiple latitude scans of selected regions of the Galactic disk. This technique of studying the extended high-energy emission of the Galaxy has proved to be very successful in minimizing systematic errors associated with the SPI and ISGRI detectors background variations and thus providing a clean emission spectrum of the Galactic disk, limited only by the photon counting statistics. In this proposal a region of the Galactic disk outside the central bulge at l~40 is selected. The ultimate goal of the entire project is to have model independent and systematics free measurements of the fluxes in nuclear lines and a broad band spectrum of the Galactic background emission. The proposed scanning technique is at present the only proven way to achieve these goals without hitting the systematics limit. Comparison of these data with the existing deep observations of the central Galactic bulge and the inner part of the Galactic disk (AO4) will allow one to address the most fundamental questions facing INTEGRAL: i) clarify the role of stellar nucleosynthesis in the production of positrons, ii) place tight constraints on the fate of the positrons, iii) allow a detailed comparison between the A26 and Fe60 nuclear lines emission and the star formation rate in different parts of the Galactic disk, iv) provide the most accurate measurement of the Galactic hard X-ray and gamma ray diffuse emission and measure or put an upper limit on the population of low energy cosmic rays in the Galaxy, which cannot be measured my other means. Taking into account the unique combination of properties of INTEGRAL instruments the proposed strategy is the best possible usage of the INTEGRAL time. Proposed observations will provide results on the high energy properties of the Milky Way that will not be overcome for decades and will therefore build up the legacy of INTEGRAL.
Publications
Temporal Coverage 2007-10-03T10:18:01Z / 2009-10-05T14:36:14Z
Version 1.0
Mission Description The INTEGRAL (International Gamma-Ray Astrophysics Laboratory) mission, launched by the European Space Agency (ESA) on October 17, 2002, was designed to study high-energy phenomena in the universe. INTEGRAL was operating until february 2025 and it was equipped with three high-energy instruments: the Imager on Board the INTEGRAL Satellite (IBIS), the Spectrometer on INTEGRAL (SPI), and the JEM-X (Joint European Monitor for X-rays). Its Optical Monitoring Camera (OMC) provided optical V-band magnitude measurements, complementing the high-energy observations.
Creator Contact https://www.cosmos.esa.int/web/integral/helpdesk
Date Published 2025-03-25T09:54:35Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Sunyaev, 2025, 'Dissecting the Milky Way II: Stellar Ridge, Cosmic Rays, Annihilation Radiation, Nucleosynthesis', 1.0, European Space Agency, https://doi.org/10.57780/esa-vwutbd9