J/ApJ/826/45ivo://CDS.VizieR/J/ApJ/826/45doi:10.26093/cds/vizier.18260045CDSRacusin J.L.Oates S.R.de Pasquale M.Kocevski D.2017-10-03T05:13:00Z2016-10-25T10:30:52ZCDS support team

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

cds-question@unistra.frgamma-ray-astronomyredshiftedx-ray-sourcesWe present a correlation between the average temporal decay ({alpha}_X,avg,>200s_) and early-time luminosity (L_X,200s_) of X-ray afterglows of gamma-ray bursts as observed by the Swift X-ray Telescope. Both quantities are measured relative to a rest-frame time of 200s after the {gamma}-ray trigger. The luminosity-average decay correlation does not depend on specific temporal behavior and contains one scale-independent quantity minimizing the role of selection effects. This is a complementary correlation to that discovered by Oates et al. (2012MNRAS.426L..86O, 2015MNRAS.453.4121O) in the optical light curves observed by the Swift Ultraviolet Optical Telescope. The correlation indicates that, on average, more luminous X-ray afterglows decay faster than less luminous ones, indicating some relative mechanism for energy dissipation. The X-ray and optical correlations are entirely consistent once corrections are applied and contamination is removed. We explore the possible biases introduced by different light-curve morphologies and observational selection effects, and how either geometrical effects or intrinsic properties of the central engine and jet could explain the observed correlation.2016ApJ...826...45Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/826/45CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/778/128 : GRB-host galaxies photometry (Perley+, 2013)J/ApJ/774/157 : Swift GRBs with X-ray afterglows and z<9.5 (Dainotti+, 2013)J/MNRAS/428/729 : GRB Swift X-ray light curves analysis (Margutti+, 2013)J/ApJ/746/156 : Radio afterglow observations of GRBs (Chandra+, 2012)J/MNRAS/418/2202 : Analysis of {gamma}-ray bursts (Dainotti+, 2011)J/ApJS/195/2 : The second Swift BAT GRB catalog (BAT2) (Sakamoto+, 2011)J/ApJ/727/73 : Composite spectrum of GRB afterglows (Christensen+, 2011)J/ApJ/720/1513 : The afterglows of Swift-era GRBs. I. (Kann+, 2010)J/MNRAS/397/1177 : Swift-XRT observations of GRBs (Evans+, 2009)J/ApJ/701/824 : Afterglows of short & long-duration GRBs (Nysewander+, 2009)J/ApJS/175/179 : The BAT1 gamma-ray burst catalog (Sakamoto+, 2008)J/A+A/455/813 : BeppoSAX cat. of GRB X-ray afterglows (De Pasquale+, 2006)http://www.astro.caltech.edu/grbhosts/redshifts.html : Preliminary Keck GRBhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/826/45https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/826/45http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/826/45https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/826/45https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/826/45http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/826/45GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/826/45/table1 (The properties of the GRBs in our sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/826/45/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/826/45/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/826/45/table1?GETtext/xml+votable180.050000true278.11341742.3706110.0055555555555555566/186 207 314 393 500 503 646 699 918 923 944 1087 2315 2336 2357 2948 2949 3111 3536 3586 3935 4312 4323 4341 4371 4449 4450 4485 5051 5625 5633 5726 5941 6102 6261 6404 7044 7182 7227 7518 7532 7589 8074 8459 8641 8669 8798 8932 9022 9100 9321 9370 9682 9989 10094 10135 10335 10400 10407 10447 10519 10602 10704 10723 10762 10852 10912 11220 11657 11673 11713 11822 11905 12020 12134 12597 13312 13331 13574 13694 13701 13924 14846 14892 14977 15004 15054 15214 15530 16057 16282 16546 16661 16991 17316 17411 17453 17721 17749 17814 18494 18681 18728 18777 18978 19049 19164 19168 19293 19731 19890 20191 20263 20360 20372 20401 20460 20655 21082 21284 21360 21498 21595 21766 21962 22129 22157 22422 22559 22580 22619 22916 23138 25174 25192 25761 25901 25946 26036 26441 26671 27085 27289 27566 27906 27933 27962 27983 28063 28071 28224 28234 28467 28555 28930 29019 29816 30088 31185 31281 31385 31494 31521 31583 31607 31700 31934 32110 32239 32310 32713 32790 33146 33265 33278 33525 33617 33679 33735 34147 34364 34435 34465 34590 34699 34788 34949 35045 35330 35393 35427 35566 35569 35633 35844 36066 36297 36374 36528 37007 37459 38280 38926 39008 39076 39993 40249 40273 40433 40778 41020 42545 42901 42952 43193 44021 44022 44212 44436 44857 45008 45205 45422 45777 45828 45836 45938 46022 46218 46250 46395 46510 46594 46989 47031 47162 47251 47436 47459 47991 48054 48189 48371 48447 48458 49004https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/826/45?format=asciiGamma-rayOpticalX-raydefaultJ/ApJ/826/45/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference text (Author and year; as in table 1)meta.ref;pos.framecharBibCodeBibcode of the reference if anymeta.bib.bibcodecharCommCommentmeta.notecharJ/ApJ/826/45/table1The properties of the GRBs in our samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGRBGamma-ray burst identifiermeta.id;meta.maincharz[0.03/9.2] Redshiftsrc.redshiftfloatr_zReference for z (see refs.dat file)meta.ref;pos.framecharT90[0.2/734] Time in which 90% of prompt fluence is emittedsphot.fluencefloataX[0.2/3.1] Average temporal decay after 200s ({alpha}_X,avg,>200s_)spect.indexfloatE_aX[0.01/2.3] Upper uncertainty in aXstat.error;stat.maxfloate_aXLower 1{sigma} uncertainty in aXstat.errorfloatLXEarly time X-ray luminosity at 1keV (1)1e-07J.cm**-2.Hz**-1phys.luminosity;em.X-raydoubleE_LXUpper 1{sigma} uncertainty in LX1e-07J.cm**-2.Hz**-1stat.error;stat.maxdoublee_LXLower 1{sigma} uncertainty in LX1e-07J.cm**-2.Hz**-1stat.errordoubleSDC[ny] Steep Decay Contaminated flagmeta.codecharPl[ny] Plateau flagmeta.codecharFl[ny] Flares flagmeta.codecharGCatDisplay the GRB data from Sakamoto+, 2008, J/ApJS/175/179 and 2011, J/ApJS/195/2/bat2 and Evans+, 2009, J/MNRAS/397/1177meta.ref.urlintnullableSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main