A dataset provided by the European Space Agency

Proposal ID 0634000
Obs ID 06340000001, 06340000002, 06340000003, 06340000004
Title AO-6 Key Programme 5: SMC/47 Tuc
Download Data Associated to the proposal https://isla.esac.esa.int/tap/download/bundle?format=ascii_curl&product_id=prop_id:0634000
DOI https://doi.org/10.57780/esa-x1appj6
Author Key Programme
Abstract AO-6 Key Programme 5: SMC/47 TucWe propose Key Programme status for the field containing 47 Tuc, which is the best studied globular cluster in most wavelengths. Our major goal is to understand whether millisecond pulsars can be a strong source of 511 keV annihilation line emission, as this is the most easily testable of the viable mechanisms for producing the annihilation line emission proposed from the Galactic Center region -- because 47 Tuc is substantially closer to us than is the Galactic Center, and all its emission fits within a single SPI beam, a 2 Megasecond SPI observation should yield a detection of 511 keV emission from 47 Tuc if millisecond pulsars are the dominant source of 511 keV emission from the Galactic Center. Understanding the Galactic Center 511 keV emission is a crucial goal: if we can eliminate mundane possibilities such as pulsar winds and positrons generated in black hole X-ray binary jets, then we can begin to take very seriously the possibility that this emission is indicating the decay of some exotic form of dark matter. Additionally, most of the Small Magellanic Cloud (including the Bar, the highest star formation rate region) fits comfortably within the INTEGRAL field of view if 47 Tuc is the primary target. Because this region of the sky has a large number of relatively short visibility windows, executing this program will require roughly weekly observations of 45 kiloseconds, which is optimal for discovering bright transients in the SMC, and does no harm to the science goals of detecting annihilation line emission from 47 Tuc and of making a deep survey of the persistent emission of the SMC.
Publications
Temporal Coverage 2008-11-18T18:54:13Z / 2009-06-26T00:13:48Z
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, Key Programme, 2025, 'AO-6 Key Programme 5: SMC/47 Tuc', 1.0, European Space Agency, https://doi.org/10.57780/esa-x1appj6