Miller-Jones, J.C.A.

Russell, T.D.

Sivakoff, G.R.

Tetarenko, A.J.

English

MAXI J1535-571 is a newly discovered Galactic hard X-ray transient (GCN #21788, ATels #10699, 10700). Following its identification as a potential hard-state low-mass X-ray binary (ATel #10702) and a potential black hole system (ATel #10708), we conducted target of opportunity observations of this source with the Australia Telescope Compact Array (ATCA)

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UvA-DARE is a service provided by the library of the University of Amsterdam (https://dare.uva.nl)UvA-DARE (Digital Academic Repository)ATCA radio detection of MAXI J1535-571 indicates it is a strong black hole X-ray binary candidateRussell, T.D.; Miller-Jones, J.C.A.; Sivakoff, G.R.; Tetarenko, A.J.; JACPOT XRBcollaborationPublication date2017Document VersionFinal published versionPublished inThe astronomer's telegramLicenseUnspecifiedLink to publicationCitation for published version (APA):Russell, T. D., Miller-Jones, J. C. A., Sivakoff, G. R., Tetarenko, A. J., & JACPOT XRBcollaboration (2017). ATCA radio detection of MAXI J1535-571 indicates it is a strong blackhole X-ray binary candidate. The astronomer's telegram, 10711.http://www.astronomerstelegram.org/?read=10711General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s)and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an opencontent license (like Creative Commons).Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, pleaselet the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the materialinaccessible and/or remove it from the website. Please Ask the Library: https://uba.uva.nl/en/contact, or a letterto: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. Youwill be contacted as soon as possible.Download date:09 Mar 2023ATel #10711: ATCA radio detection of MAXI J1535-571 indicates it is a strong black hole X-ray binary candidatehttp://www.astronomerstelegram.org/?read=10711[30-10-2018 12:06:03]OutsideGCNIAUCsOther ATel on Twitter and FacebookATELstreamATel Community SitePost | Search | PoliciesCredential | Feeds | Email30 Oct 2018; 11:05 UTThis space for free for your conference.[ Previous | Next | ADS  ]ATCA radio detection of MAXI J1535-571 indicates it is astrong black hole X-ray binary candidateATel #10711; T. D. Russell (UvA), J. C. A. Miller-Jones (ICRAR-Curtin), G. R. Sivakoff, A. J.Tetarenko (UAlberta) and the JACPOT XRB collaborationon 6 Sep 2017; 04:06 UTCredential Certification: Alexandra Tetarenko (tetarenk@ualberta.ca)Subjects: Radio, X-ray, Black Hole, TransientReferred to by ATel #: 10714, 10716, 10745, 10761, 10768, 10816, 11020, 11611Tweet  MAXI J1535-571 is a newly discovered Galactic hard X-ray transient (GCN #21788, ATels#10699, 10700). Following its identification as a potential hard-state low-mass X-ray binary(ATel #10702) and a potential black hole system (ATel #10708), we conducted target ofopportunity observations of this source with the Australia Telescope Compact Array (ATCA).We observed MAXI J1535-571 with ATCA on 2017 September 05 (scans on source between10:28-12:24 UT; MJD 58001.48 +/- 0.04). The observations were taken simultaneously at 5.5 and9.0 GHz, with a bandwidth of 2 GHz at each frequency. The array was in its 1.5 km (1.5A)configuration, providing angular resolutions of 3.3 x 3.9 arcseconds at 5.5 GHz and 2.0 x 2.4arcseconds at 9 GHz. We used 1934-638 for primary flux calibration and 1511-55 (3.03 degreesaway) for phase calibration. The data were reduced using standard routines in Miriad (Sault et al.1995), before being imaged in CASA (McMullin et al. 2007) using a natural weighting scheme tomaximize sensitivity.We significantly detected a radio source at a position consistent with the X-ray and opticallocalisations (ATels #10699, 10700, 10704). We measured flux densities of the radio source to be7.39 +/- 0.03 mJy and 7.74 +/- 0.05 mJy at 5.5 and 9.0 GHz, respectively (statistical errors only).The radio spectral index of alpha = 0.09 +/- 0.03 (where S_nu ∝ nualpha) is consistent withemission from a compact radio jet.Our best radio position (measured at 9.0 GHz) is:RA (J2000) = 15:35:19.7141 +/- 0.007 Dec (J2000) = -57:13:47.5826 +/- 0.024,where the error bars are statistical. A similar position was measured at 5.5 GHz.We assume the source is as close to the Galactic centre as possible along its l = 323.724 deg line-of-sight. Thus we estimate its distance is about 6.5 kpc. At this lower distance (compared to 8Related11884 INTEGRAL detects re-brightening of the black holecandidate MAXI J1535-57111682 MAXI/GSC detection of anundergoing soft-to-hardstate transition of MAXIJ1535-57111652 Re-brightening of the blackhole candidate MAXI J1535-571 as it transitioned back tothe soft state11611 X-ray spectral hardening andradio non-detection of MAXIJ1535-57111568 Rapidly fading the black holeX-ray nova MAXI J1535-571from MAXI/GSCobservations11020 MAXI J1535-571 currentlyshows softest spectrum10899 Radio re-brightening of MAXIJ1535-571 as it transitionsback towards the hard state10816 Brackett-Gamma emission inMAXI J1535-57110768 Initial NICER observations of abroadened iron line and QPOsin MAXI J1535â 57110761 MAXI/GSC observationsindicate further softening ofMAXI J1535-571 toward thehigh/soft state10745 Extremely Bright Radio and(Sub-)Millimetre Detectionsof MAXI J1535-57110734 Detection of the low-frequency QPOs in MAXIJ1535-57110733 Swift/BAT sees MAXI J1535-571 declining in 15-50 keV10731 Swift/XRT sees MAXI J1535-571 brightening andsoftening10729 MAXI/GSC detects an X-rayspectral softening of the X-ray transient MAXI J1535-57110716 The near-infraredcounterpart of X-raytransient MAXI J1535-57110714 MAXI J1535-571 (CandidateBlack Hole X-ray Binary):Coordination10711 ATCA radio detection ofMAXI J1535-571 indicates itis a strong black hole X-raybinary candidateRecommend 4ATel #10711: ATCA radio detection of MAXI J1535-571 indicates it is a strong black hole X-ray binary candidatehttp://www.astronomerstelegram.org/?read=10711[30-10-2018 12:06:03]kpc) our radio detection provides a 5 GHz radio luminosity of (2.053 +/- 0.008)*1e30 * (d/6.5kpc)2erg/s. X-ray spectral analyses (ATel #10708) of the source just a few hours before ourATCA radio observations measured the source at an X-ray luminosity of 5.7e37 erg/s (d/6.5kpc)2erg/s (2-10 keV). The observed radio emission at this X-ray luminosity places MAXI J1535-571 firmly above the expected radio luminosities of all known neutron star X-ray binaries (seee.g., Tetarenko at al. 2016, for a recent review), and within the expected range for black hole X-ray binaries, lying near the radio-faint track, at similar X-ray luminosities (see e.g., Gallo et al.2003, Corbel et al. 2011, for further details). This indicates that this source is a strong black holeX-ray binary candidate.The JACPOT XRB collaboration are planning to continue monitoring this outburst.Further multi-wavelength observations of this source are highly encouraged.We thank ATNF staff for rapidly scheduling these observations.10708 Further brightening of the X-ray transient MAXI J1535-571, suggesting thepresence of a black hole10704 Erratum to ATel #10702:MAXI J1535-571 opticalcounterpart coordinates10702 Discovery of the opticalcounterpart of MAXI J1535-57110700 MAXI J1535-571: Swiftdetection and localization10699 MAXI/GSC discovery of anew hard X-ray transientMAXI J1535-571[ Telegram Index ]R. E. Rutledge, Editor-in-ChiefDerek Fox, EditorMansi M. Kasliwal, Co-Editor

ATCA radio detection of MAXI J1535-571 indicates it is a strong black hole X-ray binary candidate

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ATCA radio detection of MAXI J1535-571 indicates it is a strong black hole X-ray binary candidate

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