Bazzano, A.

Boissay, R.

Capitanio, F.

Chenevez, J.

Del Santo, M.

Ferrigno, C.

Grinberg, V.

Götz, D.

Kuulkers, E.

Paizis, A.

Rodriguez, R.

Tarana, A.

Watanabe, K.

Wilms, J.

During the observations of the Galactic Center (from 2015 February 16 12:46 to February 17 at 4:25 UTC), INTEGRAL detected the two sources 1RXS J180408.9-342058 (Atel #6997, #7008, #7039) and GRO J1750-27 (Atel #1385, #1400, #6839) which were recently reported to undergo new outbursts.  1RXS J180408.9-342058 was observed in both the IBIS/ISGRI and the JEM-X FoV. A preliminary analysis of the ISGRI and JEM-X data revealed that the source broad-band spectrum (effective exposure time 34.2 ks for ISGRI and 9.3 ks for the two JEM-X) could be described by using a cut-off power-law model. We measured a power-law photon index of 1.4+/-0.2 and a cut-off energy of 58+/-9 keV. The estimated fluxes from the spectral analysis were 2.1E-9 erg/cm^2/s in the 3-20 keV energy band and 2.2E-9 erg/cm^2/s in the 20-100 keV energy band. No type-I X-ray bursts were found in the JEM-X data by scanning the 3-10 keV lightcurve of the source. GRO J1750-27 was observed by IBIS/ISGRI for an effective exposure time 34.2 ks and by the two JEM-X for a total effective exposure time 9 ks. The ISGRI spectrum of the source could be roughly described with a soft power-law of photon index ~4. The estimated source flux from the spectral fit is 7.4E-10 erg/cm^2/s in the 20-60 keV energy band. The 3-10 keV flux estimated from the JEM-X mosaic is of roughly 7E-10 erg/cm^2/s. We also report on the continued detection of the outburst from IGR J17451-3022 (ATel #6451, ATel #7028). JEM-X confirms the detection of the source at 3.7 sigma for 20 ks effective exposure with a flux of 5.2 +/-1.6 mCrab between 3-10 keV (corresponding to roughly 7.3E-11 erg/cm^2/s). This is slightly below the flux (6.5 mCrab) the source had the last time INTEGRAL saw it at the end of October 2014. The source is still undetected above 10 keV at a 5-sigma upper limit of 2 mCrab between 10-20 keV (corresponding to roughly 1.8E-11 erg/cm^2/s). Finally, we note that the INTEGRAL transient IGR J17454-2919 (ATels #6530, #6574, #6602) is not detected by the two JEM-X in the current observations of the Galactic Center (effetive exposure time 19 ks). We estimated a 5-sigma upper limit on the source flux of 4 mCrab in the 3-10 keV energy band (corresponding to roughly 5.6E-11 erg/cm^2/s) and 2 mCrab in the 10-20 keV energy band (corresponding to roughly 1.8E-11 erg/cm^2/s). Additional INTEGRAL observations of the Galactic Center are planned for the coming weeks.</p

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Downloaded from orbit.dtu.dk on: Nov 08, 2017INTEGRAL detection of the on-going outbursts from 1RXS J180408.9-342058 and GROJ1750-27Boissay, R.; Chenevez, Jérôme; Wilms, J.; Grinberg, V.; Del Santo, M.; Bazzano, A.; Capitanio, F.;Tarana, A.; Paizis, A.; Watanabe, K.; Rodriguez, R.; Götz, D.; Kuulkers, E.; Ferrigno, C.Published in:The Astronomer's TelegramPublication date:2015Document VersionPublisher's PDF, also known as Version of recordLink back to DTU OrbitCitation (APA):Boissay, R., Chenevez, J., Wilms, J., Grinberg, V., Del Santo, M., Bazzano, A., ... Ferrigno, C. (2015).INTEGRAL detection of the on-going outbursts from 1RXS J180408.9-342058 and GRO J1750-27. TheAstronomer's Telegram, (ATel #7096), 1. [ATel #7096].OutsideGCNIAUCsOtherATel on Twitter and FacebookATELstreamATel Community SiteMacOS: Dashboard WidgetPost | Search | PoliciesCredential | Feeds | Email18 Dec 2015; 16:38 UTYour Conference HereThis space for free forconference advertising.[ Previous | Next | ADS  ]ATel #7096; R. Boissay (ISDC, Switzerland), J. Chenevez (DTU, Denmark), J. Wilms (ECP,Germany), V. Grinberg (MIT, USA), M. Del Santo, A. Bazzano, F. Capitanio, A. Tarana(IAPS-INAF, Italy), A. Paizis (IASF-INAF, Italy), K. Watanabe (FGCU, USA), J. Rodriguez, D.Goetz (CEA, France), E. Kuulkers (ESA/ESAC, Spain), C. Ferrigno (ISDC, Switzerland)on 17 Feb 2015; 23:55 UTCredential Certification: E. Bozzo (enrico.bozzo@unige.ch)Subjects: X-ray, TransientTweetDuring the observations of the Galactic Center (from 2015 February 16 12:46 to February 17 at 4:25UTC), INTEGRAL detected the two sources 1RXS J180408.9-342058 (Atel #6997, #7008, #7039)and GRO J1750-27 (Atel  #1385,  #1400,  #6839)  which  were  recently  reported to  undergo newoutbursts.1RXS J180408.9-342058 was observed in both the IBIS/ISGRI and the JEM-X FoV. A preliminaryanalysis of the ISGRI and JEM-X data revealed that the source broad-band spectrum (effectiveexposure time 34.2 ks for ISGRI and 9.3 ks for the two JEM-X) could be described by using acut-off power-law model. We measured a power-law photon index of 1.4+/-0.2 and a cut-off energyof 58+/-9 keV. The estimated fluxes from the spectral analysis were 2.1E-9 erg/cm^2/s in the 3-20keV energy band and 2.2E-9 erg/cm^2/s in the 20-100 keV energy band. No type-I X-ray burstswere found in the JEM-X data by scanning the 3-10 keV lightcurve of the source.GRO J1750-27 was observed by IBIS/ISGRI for an effective exposure time 34.2 ks and by the twoJEM-X for a total effective exposure time 9 ks. The ISGRI spectrum of the source could be roughlydescribed with a soft power-law of photon index ~4. The estimated source flux from the spectral fitis 7.4E-10 erg/cm^2/s in the 20-60 keV energy band. The 3-10 keV flux estimated from the JEM-Xmosaic is of roughly 7E-10 erg/cm^2/s.We also report on the continued detection of the outburst from IGR J17451-3022 (ATel #6451, ATel#7028). JEM-X confirms the detection of the source at 3.7 sigma for 20 ks effective exposure with aflux of 5.2 +/-1.6 mCrab between 3-10 keV (corresponding to roughly 7.3E-11 erg/cm^2/s). This isslightly below the flux (6.5 mCrab) the source had the last time INTEGRAL saw it at the end ofOctober 2014. The source is still undetected above 10 keV at a 5-sigma upper limit of 2 mCrabbetween 10-20 keV (corresponding to roughly 1.8E-11 erg/cm^2/s).Finally, we note that the INTEGRAL transient IGR J17454-2919 (ATels #6530, #6574, #6602) isnot detected by the two JEM-X in the current observations of the Galactic Center (effetive exposuretime 19 ks). We estimated a 5-sigma upper limit on the source flux of 4 mCrab in the 3-10 keVenergy band (corresponding to roughly 5.6E-11 erg/cm^2/s) and 2 mCrab in the 10-20 keV energyband (corresponding to roughly 1.8E-11 erg/cm^2/s).Additional INTEGRAL observations of the Galactic Center are planned for the coming weeks.Related7570 IGR J17451-3022 returning toquiescence7361 Discovery of eclipses in theX-ray transient IGRJ17451-30227352 The neutron star LMXB 1RXSJ180408.9-342058 transitionedto a soft X-ray state7255 Radio detection of thetransient neutron star LMXB1RXS J180408.9-3420587100 Optical observations of thetransient 1RXSJ180408.9-3420587096 INTEGRAL detection of theon-going outbursts from 1RXSJ180408.9-342058 and GROJ1750-277039 Swift observations of 1RXSJ180408.9-3420587028 Continuing outburst ofGalactic transient IGRJ17451-30227020 Chandra position of IGRJ17454-2919 and discovery ofa possible NIR counterpart7008 MAXI/GSC observation of 1RXSJ180408.9-342058 in outburst6997 Swift/BAT detects an outburstfrom the neutron star binary1RXS J180408.9-3420586839 New Outburst of the Be/X-rayTransient GRO J1750-27Detected with Fermi/GBM6602 INTEGRAL/JEM-X seesenhanced activity in theGalactic center region: SAXJ1747.0-2853 and IGRJ17454-29196574 Hard X-ray spectral and timingproperties of IGR J17454-2919consistent with a black hole inthe hard state6533 Chandra Localization of IGRJ17451-30226530 IGR J17454-2919: a new X-raytransient found byINTEGRAL/JEM-X close to theGalactic Center6501 New Galactic transient IGRJ17451-3022 still soft6486 Detection of spectralhardening in IGR J17451-3022;evidence for a LMXB6469 Swift observations of theongoing outburst of IGRJ17451-30226459 Soft, absorbed X-ray spectra ofthe new transient IGRJ17451-30226451 A new X-ray transient, IGRJ17451-3022, discovered byINTEGRAL/JEM-X near theGalactic Centre5041 MAXI/GSC detection of anX-ray outburst probably fromSAX J1747.0-2853 and Swiftfollowup observation of theGalactic center region1Recommend4622 MAXI/GSC detection of apossible superburst from SLX1735-2694085 Swift observations of 1RXSJ180408.9-342058; return toquiescence4050 INTEGRAL catches a type-IX-ray burst from theunclassified X-ray source 1RXSJ180408.9-3420583930 INTEGRAL Bulge monitoringprogram detects severalactive transients with JEM-X3842 MAXI/GSC detects a quasi-regular outburst and apossible soft state transitionin H 1743-3223646 INTEGRAL Galactic Bulgemonitoring: transient activityfrom KS 1741-293, MXB1730-335, and IGR J17498-29213263 IGR J17464-3213 (= H1743-322)is active again3217 SAX J1747.0-2853: 'normal'thermonuclear burstsresumed3183 First superburst observed byINTEGRAL, from SAXJ1747.0-28533172 INTEGRAL sees continuingactivity from SAX J1747.0-2853,but not from SAX J1750.8-29003123 MAXI/GSC detects an X-rayoutburst from the Galacticcenter region, GROJ1744-28/MAXI J1745-2883098 MAXI/GSC detects renewedactivity from SLX 1746-3312596 Discovery of the orbital periodin the Swift/Bat data of thehighly absorbed HMXB IGRJ17354-3255.2058 Swift/BAT reports renewedactivity from H 1743-3222019 Swift detection of an X-raytransient possibly associatedwith IGR J17354-32551829 XMM-Newton Observations ofH1743-3221808 A state change of H1743-322confirmed by INTEGRALobservations1804 A state change of theblack-hole transient H1743-3221780 RXTE observations of theblack hole candidateH1743-322 in its rising phaseof the outburst1779 H1743-322 in stable outburstphase1766 Renewed radio activity fromH1743-322 observed with theATCA1745 More INTEGRAL observationsof H1743-322/IGR J17464-3213:evolution of the source intooutburst1739 INTEGRAL spots renewedactivity from H1743-3221651 Kilohertz QPOs, spectral statetransitions and the distance tothe neutron star X-raytransient IGR J17473-2721.1633 Confirmation of the NIRcounterparts to SLX 1746-331and XTE J1810-1891513 Chandra detects SwiftJ174535.5-290135.6 in arelatively bright state1471 Earlier activity from XTEJ1739-302/IGR J17391-3021detected by INTEGRAL1468 Continuous brightening of IGRJ17473-27211466 Swift observes a new outburstfrom the Supergiant Fast X-rayTransientXTEJ1739-302/IGRJ17391-30211461 Hard X-ray activity of IGRJ17473-27211460 RXTE Confirms PersistentActivity of Burster IGRJ17473-27211459 Swift/XRT follow-upobservations of IGRJ17473-27211445 SuperAGILE detects an X-rayburst from a positionconsistent with IGRJ17473-27211414 H1743-322 back to thequiescence1401 Swift observations of thecontinuing outburst of GROJ1750-271400 Further observations of GROJ1750-27 (AX J1749.1-2639)with INTEGRAL1398 Recent activity of the RapidBurster (MXB 1730-335)1387 Swift/XRT observation ofH1743-3221385 INTEGRAL Galactic bulgemonitoring observations ofGRO J1750-27 (AXJ1749.1-2639), H1743-322 andSLX 1746-3311384 On-going radio observationsof H1743-3221378 Galactic black hole transientH1743-322 in transition to thehard state1376 Swift/BAT Detects IncreasedActivity from the AccretingPulsar GRO J1750-271352 Further radio observations ofH1743-3221349 Radio detection of the blackhole transient H 1743-322 inoutburst.1348 Galactic black hole transientsH1743-322 and 4U 1630-47 inoutburst1266 Recent and past activity of thesupergiant fast X-ray transientIGR J17544-2619 as seen byINTEGRAL1252 Near-infrared counterpartcandidate to SLX 1746-3311237 Swift/XRT localization of SLX1746-3311235 SLX 1746-331 In Outburst1228 A new outburst of therecurrent neutron startransient SAX J1747.0-28531185 INTEGRAL detects hard X-raysfrom SAX J1810.8-2609 duringits current outburst1058 Long duration outbursts fromthe two X-ray bursters AXJ1745.6-2901 and GRS1741.9-2853 suggested byXMM-Newton observations1013 Chandra Detection of ThreeEnigmatic X-ray Transients:GRS 1741.9-2853,1008 IGR J17453-2853 = Granat1741.9-2853?1006 Renewed activity of theGalactic center transientsSwift J174535.5-290135.6 andGRS 1741.9-2853 as observedwith Swift/XRT1005 Two active X-ray transients inthe Galactic Center region asseen by INTEGRAL892 Renewed activity of the veryfaint X-ray transient CXOGCJ174535.5-290124 andcontinued activity of theneutron-star X-ray transientSAX J1747.0-2853886 Further INTEGRALobservations of IGRJ17497-2821874 New INTEGRAL source, IGRJ17354-3255, and continuationof the INTEGRAL GalacticBulge monitoring program756 INTEGRAL detects SWIFTJ174535.5-290135.6753 Swift/XRT detection of atransient source in theGalactic Center593 Brightening of H1743-322 andthe Rapid Burster576 H1743-322 X-ray Rise498 Discovery of XTE J1747-274482 Superburst in 4U1608-52467 New X-ray transient IGRJ17473-2721 discovered withINTEGRAL143 SLX 1746-331136 Clarification on the associationbetween IGR J17464-3213 andH1743-322132 IGR J17464-3213jerome@dsri.dk[ Telegram Index ]R. E. Rutledge, Editor-in-ChiefDerek Fox, EditorMansi M. Kasliwal, Co-Editor

INTEGRAL detection of the on-going outbursts from 1RXS J180408.9-342058 and GRO J1750-27

http://orbit.dtu.dk/ws/files/119087861/ATel_7096_INTEGRAL_detection_of_the_on_going_outbursts_from_1RXS_J180408.pdf

INTEGRAL detection of the on-going outbursts from 1RXS J180408.9-342058 and GRO J1750-27

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