Parikh, A.S.

Russell, T.D.

Wijnands, R.

English

MAXI J1535-571 is a candidate black hole low-mass X-ray binary that was discovered in outburst in September 2017 (Barthelmy et al. 2017, Negoro et al. 2017)

International Migration, Integration and Social Cohesion online publications

UvA-DARE is a service provided by the library of the University of Amsterdam (https://dare.uva.nl)UvA-DARE (Digital Academic Repository)X-ray non-detection of black hole transient MAXI J1535-571Parikh, A.S.; Wijnands, R.; Russell, T.D.Publication date2019Document VersionFinal published versionPublished inThe astronomer's telegramLicenseUnspecifiedLink to publicationCitation for published version (APA):Parikh, A. S., Wijnands, R., & Russell, T. D. (2019). X-ray non-detection of black holetransient MAXI J1535-571. The astronomer's telegram, 12780.http://www.astronomerstelegram.org/?read=12780General 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 #12780: X-ray non-detection of black hole transient MAXI J1535-571http://www.astronomerstelegram.org/?read=12780[3-4-2020 14:33:28]OutsideGCNIAUCsOther ATel on Twitter and FacebookATELstreamATel Community SitePost | Search | PoliciesCredential | Feeds | Email3 Apr 2020; 12:32 UTThis space for free for your conference.[ Previous | Next | ADS  ]X-ray non-detection of black hole transient MAXI J1535-571ATel #12780; A. S. Parikh, R. Wijnands, T. D. Russell (UvA)on 20 May 2019; 08:41 UTCredential Certification: Aastha Parikh (A.S.Parikh@uva.nl)Subjects: X-ray, Black Hole, TransientMAXI J1535-571 is a candidate black hole low-mass X-ray binary that was discovered inoutburst in September 2017 (Barthelmy et al. 2017, Negoro et al. 2017). We have monitored thesource using the Neil Gehrels Swift Observatory/X-ray Telescope (Swift/XRT) since itsdiscovery. Its main outburst ended in 2018 May, after which it was followed by several re-brightenings (e.g., Parikh et al. 2018). MAXI J1535-571 exhibited at least 5 such re-brightenings.However, these re-brightenings ceased at the end of January 2019 and the source entered a quasi-steady state during which its intensity was found to only vary by a factor of 3, hovering around anaverage XRT count rate of ~0.2 c/s (0.5-10 keV). This quasi-steady state lasted ~3.5-4.5 months.We fit the spectrum extracted from the combined quasi-steady state XRT data with an absorbedpower-law model find a photon index of Gamma ~ 1.7 (and the equivalent hydrogen columndensity was found to be Nh ~ 2.6E22 cm^-2). MAXI J1535-571 exhibited an average luminosityof ~3.7E34 erg/s (0.5-10 keV; assuming d = 4 kpc) during this quasi-steady state.A short XRT observation (~500 s) of MAXI J1535-571 carried out on 11 May 2019 showed thatthe source was no longer detected, with an upper limit corresponding to 5.2E-3 c/s (using the 90%prescription by Gehrels, 1986). The source was detected at a count rate of 0.2 c/s (0.5-10 keV)~27 days prior to this observation. We requested an additional XRT observation having a longerexposure time in order to further constrain the source activity level after the non-detection. Weobtained an XRT observation on 17 May 2019 (having an exposure of ~2.3 ks) during which thesource was again not detected. We combined the data from these two observations in which thesource was not detected (observation ID: 00010264119 and 00010264120) to obtain an upperlimit of 8.6E-4 c/s. We calculated the luminosity corresponding to this upper limit using XSpec,assuming the same spectral parameters as those observed during the quasi-steady state. We findthat the upper limit corresponds to a luminosity of <8E32 erg/s (0.5-10 keV; d = 4 kpc). Ourapproved XRT monitoring of MAXI J1535-571 continues for 1 more month, observing the sourceonce every two weeks, allowing us to track if the source becomes active again.Related12780 X-ray non-detection of blackhole transient MAXI J1535-57111884 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 MAXIJ1535-57110731 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-rayATel #12780: X-ray non-detection of black hole transient MAXI J1535-571http://www.astronomerstelegram.org/?read=12780[3-4-2020 14:33:28]We thank the Swift team for approving and scheduling scheduling our requested observations.Barthelmy et al. 2017, GCN #21792Gehrels, 1986, ApJ, 303, 336Negoro et al. 2017, ATel #10699Parikh et al. 2018, ATel #11652transient 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 candidate10708 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

X-ray non-detection of black hole transient MAXI J1535-571

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X-ray non-detection of black hole transient MAXI J1535-571

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