J/ApJ/773/92ivo://CDS.VizieR/J/ApJ/773/92doi:10.26093/cds/vizier.17730092CDSHenley D.B.Shelton R.L.2017-09-19T14:23:56Z2015-03-19T16:00:13ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frx-ray-sourcesinterstellar-mediumsurveysWe present measurements of the Galactic halo's X-ray emission for 110 XMM-Newton sight lines selected to minimize contamination from solar wind charge exchange emission. We detect emission from few million degree gas on ~4/5 of our sight lines. The temperature is fairly uniform (median = 2.22x10^6^K, interquartile range = 0.63x10^6^K), while the emission measure and intrinsic 0.5-2.0keV surface brightness vary by over an order of magnitude (~(0.4-7)x10^-3^cm^-6^pc and ~(0.5-7)x10^-12^erg/cm2/s deg^-2^, respectively, with median detections of 1.9x10^-3^cm^-6^pc and 1.5x10^-12^erg/cm2/s deg^-2^, respectively). The high-latitude sky contains a patchy distribution of few million degree gas. This gas exhibits a general increase in emission measure toward the inner Galaxy in the southern Galactic hemisphere. However, there is no tendency for our observed emission measures to decrease with increasing Galactic latitude, contrary to what is expected for a disk-like halo morphology. The measured temperatures, brightnesses, and spatial distributions of the gas can be used to place constraints on models for the dominant heating sources of the halo. We provide some discussion of such heating sources, but defer comparisons between the observations and detailed models to a later paper.2013ApJ...773...92Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/773/92CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/xmm : XMM-Newton Observation Log (XMM-Newton Science Operation Center, 2012)IX/41 : XMM-Newton Serendipitous Source Catalogue 2XMMi-DR3 (XMM-SSC, 2010)VIII/76 : Leiden/Argentine/Bonn (LAB) Survey of Galactic HI (Kalberla+ 2005)VI/62 : Photoelectric absorption cross-sections (Balucinska-Church+, 1992)J/ApJS/202/14 : Diffuse OVII and OVIII emission from XMM (II) (Henley+, 2012)J/ApJS/187/388 : A XMM-Newton survey of the SXRB (I) (Henley+, 2010)J/A+A/493/339 : XMM-Newton serendipitous Survey. V. (Watson+, 2009)J/A+A/393/425 : Spectral analysis of Lockman Hole (Mainieri+, 2002)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/773/92https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/773/92http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/773/92https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/773/92https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/773/92http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/773/92GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/773/92/table1 (Observation details and spectral fit results)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/773/92/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/773/92/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/773/92/table1?GETtext/xml+votable180.050000true359.91362-32.170060.0055555555555555566/5367 5370 5438 5469 5522 5538 5604 5629 5630 5670 5725 5794 5936 6009 6015 6051 6077 6078 6124 6618 7185 7235 7257 7260 7301 7309 7448 7456 7576 7606 7642 7954 8033 9415 9421 9444 9469 10004 10414 10440 10444 10560 10598 10841 10856 10888 10927 10977 11027 11035 11048 11050 11127 11158 11209 11512 11829 12122 16444 16447 16642 16655 16656 17438 20030 20145 28054 28415 28427 28492 28515 28548 28583 28621 33004 33193 33456 33804 34266 34290 34294 34382 34414 34531 34737 34788 34845 35049 35079 35099 35240 35272 35447 35536 35542 35611 35935 35969 36158 36417 36487 40433 45821 46158 46159 46170 46176 46177 46179 46180 46181 46182 46442 46474 46477 46739 46740 46882https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/773/92?format=asciiX-raydefaultJ/ApJ/773/92/table1Observation details and spectral fit resultsSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/110] Sight line identification number (1)meta.idfloatf_SeqFlag(s) about sight line (2)meta.codecharNNumber of observations for this sight linemeta.numberintnullableObsID? XMM-Newton observation ID (3)meta.id;obsnullableNameTarget name (4)meta.id;meta.maincharGLONGalactic longitude (XMM pointing direction)degpos.galactic.lonGLATGalactic latitude (XMM pointing direction)degpos.galactic.latExp1[5/91]? Usable MOS1 exposure time (5)kstime.duration;obs.exposurefloatnullableO1? Solid angle of the MOS1 detector (6)arcmin**2pos.posAng;instr.detintnullableExp2[5.2/91]? Usable MOS2 exposure time (5)kstime.duration;obs.exposurefloatnullableO2? Solid angle of the MOS2 detector (6)arcmin**2pos.posAng;instr.detintnullableF/g[304/898]? R12 count rate (7)count.s**-1.arcmin**-2phot.count;em.X-rayintnullableNHI[0.6/5.8]? Hydrogen column density (8)1e+20cm**-2phys.columnDensityfloatnullableT[1.4/4.1]? Best-fit halo temperature (9)1e+06Kphys.temperature;meta.modelledfloatnullablef_T[c] c: Temperature held fixed during fitting (see Section 3.1.2)meta.codecharE_T[0.05/8.2]? 90% confidence statistical upper error1e+06Kstat.error;stat.maxfloatnullablee_T? 90% confidence statistical lower error1e+06Kstat.errorfloatnullableEsT[0.05/12.3]? Systematic positive error (10)1e+06Kstat.errorfloatnullableesT[0.05/0.8]? Systematic negative error (10)1e+06Kstat.errorfloatnullableEM[0/6.8]? Emission measure (9)0.001cm**-6.pcphys.emissMeasurefloatnullableE_EM[0.1/31.3]? 90% confidence statistical upper error0.001cm**-6.pcstat.error;stat.maxfloatnullablee_EM? 90% confidence statistical lower error0.001cm**-6.pcstat.errorfloatnullableEsEM[0/1.6]? Systematic positive error (10)0.001cm**-6.pcstat.errorfloatnullableesEM? Systematic negative error (10)0.001cm**-6.pcstat.errorfloatnullablechi2[104.5/2449]? {chi}^2^stat.fit.chi2floatnullabledof[104/3320]? Degrees of freedomstat.fit.dofintnullablel_S0.5-2Limit flag on S0.5-2meta.code.errorcharS0.5-2[0.3/7.3]? Intrinsic 0.5-2keV surface brightness of the halo in 10^-12^erg/cm^2^/s/deg^2^ (11)fW.m**-2.deg**-2phot.mag.sbfloatnullableE_S0.5-2[0.1/9]? Positive error on S0.5-2 (12)fW.m**-2.deg**-2stat.error;stat.maxfloatnullablee_S0.5-2[0.1/2]? Negative error on S0.5-2 (12)fW.m**-2.deg**-2stat.errorfloatnullablePapIIDisplay data from Paper II (Henley & Shelton, 2012, J/ApJS/202/14)meta.ref.urlcharNEDSimbad column added by the CDSmeta.ref.urlchar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)degpos.eq.decnullableindexed