A dataset provided by the European Space Agency

Name: Outside TAC TOO on Swift J1658.2-4242
Published: 2025-03-25T09:54:39Z

Proposal ID	1570001
Obs ID	15700010001
Title	Outside TAC TOO on Swift J1658.2-4242
Download Data Associated to the proposal	https://isla.esac.esa.int/tap/download/bundle?format=ascii_curl&product_id=prop_id:1570001
DOI	https://doi.org/10.57780/esa-5z9icas
Author	Ducci
Abstract	We propose to observe the new bright X-ray transient Swift J1658.2-4242 as soon as feasible during one of the coming revolutions for a total exposure time of ~170 ks in order to probe the nature of the source (the observation can also be split in two revolutions).We note that, although the Galactic Center region will be observed during the next revolutions, Swift J1658.2-4242 will be always far off-axis and visible only in a very few pointings. This is detrimental for the spectral signal to noise ratio and the instrument calibrations (beside being always outside the JEMX field of view).The observation could be performed together with an already accepted NuSTAR DDT ToO (not requested by our group, but the NuSTAR PI can be contacted).Swift J1658.2-4242 is a new transient source in the Galactic plane which has been recently discovered by the Swift Burst Alert Telescope (GCN #22416, GCN #22417). A follow up Swift/XRT observation (ATel #11307) showed that its 0.3-10 keV spectrum can be described by an absorbed power-law with photon index 1.2+/-0.3 and column density of 1.5e23 cm^-2. The source flux is about 7.2 (+/-0.6)E-10 erg/cm^2/s in the 0.3-10 keV.Swift J1658.2-4242 has been observed also by INTEGRAL (ATEL #11306), during an observation of the Galactic center region.The source was always observed strongly off-axis, thus outside of the JEM-X field of view. The IBIS/ISGRI fluxes were about 7e-10 erg/cm^2/s (20-40 keV) and 4e-10 erg/cm^2/s (40-80 keV).Kennea (ATel #11311) reported the detection of possible periodicity in Swift/XRT data (exposure: 1629s) of P = 8.7274 +- 0.0078 s, indicating the Swift J1658.2-4242 is possibly an accreting pulsar.We propose to monitor the soft and hard X-ray emission of the source throughout the evolution and fall of the outburst to better constrain its nature from its X-ray properties and optimally measure its broad-band X-ray spectrum, looking in particular for cyclotron lines. If detected, pulsations will be studied.
Publications	A catalogue of intermediate-duration Type I X-ray bursts observed with the INTEGRAL satellite - Alizai, K., Chenevez, J.,Brandt, S.,Lund, N. (2020-03-01) http://ui.adsabs.harvard.edu/#abs/2020MNRAS.494.2509A An underlying clock in the extreme flip-flop state transitions of the black hole transient Swift J1658.2-4242 - Bogensberger, D., Ponti, G.,Jin, C.,Belloni, T. M.,Pan, H.,Nandra, K.,Russell, T. D.,Miller-Jones, J. C. A.,Munoz-Darias, T.,Vynatheya, P.,Vincentelli, F. (2020-09-01) http://ui.adsabs.harvard.edu/#abs/2020A&A...641A.101B Apsidal motion and absolute parameters of GV Nor and V881 Sco based on mid-resolution spectroscopy and TESS photometry - Surgit, Derya, Zasche, Petr,Hadrava, Petr,Erdem, Ahmet,Engelbrecht, Chris A.,Marang, Fred,Masek, Martin,Stevens, Daniel J. (2023-03-01) http://ui.adsabs.harvard.edu/#abs/2023MNRAS.519.4699S Diffuse Galactic emission spectrum between 0.5 and 8.0 MeV - Siegert, Thomas, Berteaud, Joanna,Calore, Francesca,Serpico, Pasquale D.,Weinberger, Christoph (2022-04-01) http://ui.adsabs.harvard.edu/#abs/2022A&A...660A.130S Discovery and Identification of MAXI J1621-501 as a Type I X-Ray Burster with a Super-orbital Period - Gorgone, Nicholas M., Kouveliotou, Chryssa,Negoro, Hitoshi,Wijers, Ralph A. M. J.,Bozzo, Enrico,Guiriec, Sylvain,Bult, Peter,Huppenkothen, Daniela,Gogus, Ersin,Bahramian, Arash,Kennea, Jamie,Linford, Justin D.,Miller-Jones, James,Baring, Matthew G.,Beniamini, Paz,Chakrabarty, Deepto,Granot, Jonathan,Hailey, Charles,Harrison, Fiona A.,Hartmann, Dieter H.,Iwakiri, Wataru,Kaper, Lex,Kara, Erin,Mazzola, Simona,Murata, Katsuhiro,Stern, Daniel,Tomsick, John A.,van der Horst, Alexander J.,Younes, George A. (2019-10-01) http://ui.adsabs.harvard.edu/#abs/2019ApJ...884..168G Gamma-Ray Emission of ⁶⁰Fe and ²⁶Al Radioactivity in Our Galaxy - Wang, W., Siegert, T.,Dai, Z. G.,Diehl, R.,Greiner, J.,Heger, A.,Krause, M.,Lang, M.,Pleintinger, M. M. M.,Zhang, X. L. (2020-02-01) http://ui.adsabs.harvard.edu/#abs/2020ApJ...889..169W INTEGRAL Observations of Magnetars - Pacholski, Dominik Patryk, Ducci, Lorenzo,Topinka, Martin,Mereghetti, Sandro (2025-01-01) http://ui.adsabs.harvard.edu/#abs/2025AN....34640109P Primordial black hole dark matter in the context of extra dimensions - Friedlander, Avi, Mack, Katherine J.,Schon, Sarah,Song, Ningqiang,Vincent, Aaron C. (2022-05-01) http://ui.adsabs.harvard.edu/#abs/2022PhRvD.105j3508F Sgr B2 hard X-ray emission with INTEGRAL after 2009: still detectable? - Kuznetsova, Ekaterina, Krivonos, Roman,Lutovinov, Alexander,Clavel, Maica (2022-01-01) http://ui.adsabs.harvard.edu/#abs/2022MNRAS.509.1605K ²⁶Al gamma rays from the Galaxy with INTEGRAL/SPI - Pleintinger, Moritz M. M., Diehl, Roland,Siegert, Thomas,Greiner, Jochen,Krause, Martin G. H. (2023-04-01) http://ui.adsabs.harvard.edu/#abs/2023A&A...672A..53P Swift, NuSTAR, and INTEGRAL observations of the symbiotic X-ray binary IGR J16194-2810 - Bozzo, E., Romano, P.,Ferrigno, C.,Ducci, L. (2024-01-01) http://ui.adsabs.harvard.edu/#abs/2024MNRAS.527.3585B The Energetic Thermonuclear Bursts in SAX J1712.6-3739 - Lin, Jie, Yu, Wenfei (2020-11-01) http://ui.adsabs.harvard.edu/#abs/2020ApJ...903...37L Unveiling the short and faint X-ray transient nature of IGR J17419-2802 - Sguera, V., Sidoli, L. (2024-10-01) http://ui.adsabs.harvard.edu/#abs/2024A&A...690A.260S
Temporal Coverage	2018-02-20T14:04:31Z / 2018-02-22T15:39:57Z
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	2025-03-25T09:54:39Z
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Ducci, 2025, 'Outside TAC TOO on Swift J1658.2-4242', 1.0, European Space Agency, https://doi.org/10.57780/esa-5z9icas