J/ApJ/888/40ivo://CDS.VizieR/J/ApJ/888/40doi:10.26093/cds/vizier.18880040CDSAnumarlapudi A.Bhalerao V.Tendulkar S.P.Balasubramanian A.2021-12-06T20:36:29Z2021-11-18T08:52:10ZCDS support team

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

cds-question@unistra.frradio-astronomyx-ray-sourcesastronomical-reference-materialsFast radio bursts (FRBs) are short-lived (~ms), energetic transients (having a peak flux density of ~Jy) with no known prompt emission in other energy bands. We present results of a search for prompt X-ray emissions from 41 FRBs using the Cadmium Zinc Telluride Imager (CZTI) on AstroSat, which continuously monitors ~70% of the sky. Our searches on various timescales in the 20-200keV range, did not yield any counterparts in this hard X-ray band. We calculate upper limits on hard X-ray flux, in the same energy range and convert them to upper bounds for {eta}: the ratio of X-ray to radio fluence of FRBs. We find {eta}<=10^8-10^ for hard X-ray emission. Our results will help constrain the theoretical models of FRBs as the models become more quantitative and nearer, brighter FRBs are discovered.2020ApJ...888...40Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/888/40CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/812/81 : Arecibo Pulsar-ALFA (PALFA) survey. IV. (Lazarus+, 2015)J/other/PASA/33.45 : FRBCAT: The Fast Radio Burst (FRB) Cat. (Petroff+, 2016)J/ApJ/846/44 : Luminous persistent sources in nearby galaxies (Ofek, 2017)J/ApJ/887/L7 : Faraday rotation of radio sources from THOR (Shanahan+, 2019)http://www.frbcat.org/ : FRB cataloguehttp://astrosat.iucaa.in/czti/?q=grb : CZTI GRB monitor pagehttp://astronomy.swin.edu.au/research/utmost/?page_id=1910 : All UTMOST FRBshttp://www.wis-tns.org/ : IAU transient name server with FRBshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/888/40https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/888/40http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/888/40https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/888/40https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/888/40http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/888/40GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/888/40/table2 (Observed parameters of radio bursts)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/888/40/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/888/40/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/888/40/table2?GETtext/xml+votable180.050000true0.5890833-7.58183330.0055555555555555566/1381 1887 4019 4086 7849 8061 9884 10369 11989 12087 12098 16156 17350 18588 18608 20503 21672 23574 25067 25416 25886 25926 27186 33128 33456 33593 36347 36676 39099 39339 39555 42547 45152 45891 46243 46698 46789 46809 48071 48473 48484https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/888/40?format=asciiX-rayRadiodefaultJ/ApJ/888/40/table2Observed parameters of radio burstsSimbadNameSimbad column added by the CDSmeta.idcharnullableNxNumber of X-ray measurements for this FRB (link to Table 3)meta.numberintnullableNameName designated to FRBmeta.id;meta.maincharprimaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEpochUTC hour of detectiontime.epochRAJ2000[0/22] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainTelRadio Telescope (1)instr.telcharFreq[111/1405] Central frequencyMHzem.freqfloatBandwidth[2.5/400] Bandwidth (2)MHzinstr.bandwidthfloatFlux[0.2/666.7] Radio fluxJyphot.flux.density;em.radiofloatFWHM[0.08/3300] Full Width at Half Maximummsspect.line.widthfloatFluence[1.5/1782] Radio fluenceJy.msphot.fluencedoubleP16Display the FRBCAT data (Petroff+, 2016, J/other/PASA/33.45)meta.ref.urlintnullableJ/ApJ/888/40/table3CZTI fluence limits on X-rays from FRBsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName designated to FRBmeta.id;meta.maincharRFlux[0.2/666.7] Radio FluxJyphot.flux.density;em.radiofloatRFluence[1.5/1782] Radio FluenceJy.msphot.fluencefloattbin[0.01/1] Binning time for X-ray datastime.intervalfloatSp-Index[-1.6/-1] Power law indexmeta.code;spect.indexfloatXFluence-1[5.9e-8/7e-6] X-ray Fluence; index=-1mJ.m**-2phot.fluencedoubleXFluenceMax[5.9e-8/7.9e-6] X-ray Fluence; index=alpha (1)mJ.m**-2phot.fluence;stat.maxdoubleratio[0.02/83.7] X-ray/Radio fluence ratio; index=-1phot.fluence;arith.difffloatratioMax[0.02/87.3] X-ray/Radio fluence ratio; index= alpha (1)phot.fluence;arith.diff;stat.maxfloatAuthAuthor's name of the reference to original detectionmeta.bib.authorcharBibCodeBibcode of the referencemeta.bib.bibcodecharJ/ApJ/888/40/table1Parameters used for CZTI searchFlag[ab] Flag (1)meta.code.errorcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintParameterData reduction and Search parametersobs.paramcharValueValuesstat.fit.paramchar