Study of Long-term Spectral Evolution and X-Ray and γ-Ray Correlation of Blazars Seen by HAWC
The HAWC Observatory collected 6 yr of extensive data, providing an ideal platform for long-term monitoring of blazars in the very high energy (VHE) band, without bias toward specific flux states. HAWC continuously monitors blazar activity at TeV energies, focusing on sources with a redshift of z ≤...
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| author | R. Alfaro C. Alvarez A. Andrés J.C. Arteaga-Velázquez D. Avila Rojas H.A. Ayala Solares R. Babu E. Belmont-Moreno A. Bernal K.S. Caballero-Mora T. Capistrán A. Carramiñana F. Carreón S. Casanova U. Cotti J. Cotzomi S. Coutiño de León E. De la Fuente D. Depaoli N. Di Lalla R. Diaz Hernandez B.L. Dingus M.A. DuVernois M. Durocher J.C. Díaz-Vélez K. Engel C. Espinoza K.L. Fan N. Fraija S. Fraija J.A. García-González F. Garfias A. Gonzalez Muñoz M.M. González J.A. Goodman S. Groetsch J.P. Harding S. Hernández-Cadena I. Herzog D. Huang F. Hueyotl-Zahuantitla A. Iriarte V. Joshi S. Kaufmann D. Kieda A. Lara W.H. Lee J. Lee H. León Vargas J.T. Linnemann A.L. Longinotti G. Luis-Raya K. Malone O. Martinez I. Martinez-Castellanos J. Martínez-Castro J.A. Matthews P. Miranda-Romagnoli J.A. Montes E. Moreno M. Mostafá A. Nayerhoda L. Nellen M.U. Nisa R. Noriega-Papaqui N. Omodei M. Osorio Y. Pérez Araujo E.G. Pérez-Pérez C.D. Rho D. Rosa-González E. Ruiz-Velasco H. Salazar D. Salazar-Gallegos A. Sandoval M. Schneider J. Serna-Franco A.J. Smith Y. Son R.W. Springer O. Tibolla K. Tollefson I. Torres R. Torres-Escobedo R. Turner F. Ureña-Mena E. Varela L. Villaseñor X. Wang I.J. Watson K. Whitaker E. Willox S. Yun-Cárcamo H. Zhou C. de León HAWC collaboration Abraham D. Falcone Fredric Hancock |
| author_facet | R. Alfaro C. Alvarez A. Andrés J.C. Arteaga-Velázquez D. Avila Rojas H.A. Ayala Solares R. Babu E. Belmont-Moreno A. Bernal K.S. Caballero-Mora T. Capistrán A. Carramiñana F. Carreón S. Casanova U. Cotti J. Cotzomi S. Coutiño de León E. De la Fuente D. Depaoli N. Di Lalla R. Diaz Hernandez B.L. Dingus M.A. DuVernois M. Durocher J.C. Díaz-Vélez K. Engel C. Espinoza K.L. Fan N. Fraija S. Fraija J.A. García-González F. Garfias A. Gonzalez Muñoz M.M. González J.A. Goodman S. Groetsch J.P. Harding S. Hernández-Cadena I. Herzog D. Huang F. Hueyotl-Zahuantitla A. Iriarte V. Joshi S. Kaufmann D. Kieda A. Lara W.H. Lee J. Lee H. León Vargas J.T. Linnemann A.L. Longinotti G. Luis-Raya K. Malone O. Martinez I. Martinez-Castellanos J. Martínez-Castro J.A. Matthews P. Miranda-Romagnoli J.A. Montes E. Moreno M. Mostafá A. Nayerhoda L. Nellen M.U. Nisa R. Noriega-Papaqui N. Omodei M. Osorio Y. Pérez Araujo E.G. Pérez-Pérez C.D. Rho D. Rosa-González E. Ruiz-Velasco H. Salazar D. Salazar-Gallegos A. Sandoval M. Schneider J. Serna-Franco A.J. Smith Y. Son R.W. Springer O. Tibolla K. Tollefson I. Torres R. Torres-Escobedo R. Turner F. Ureña-Mena E. Varela L. Villaseñor X. Wang I.J. Watson K. Whitaker E. Willox S. Yun-Cárcamo H. Zhou C. de León HAWC collaboration Abraham D. Falcone Fredric Hancock |
| author_sort | R. Alfaro |
| collection | DOAJ |
| description | The HAWC Observatory collected 6 yr of extensive data, providing an ideal platform for long-term monitoring of blazars in the very high energy (VHE) band, without bias toward specific flux states. HAWC continuously monitors blazar activity at TeV energies, focusing on sources with a redshift of z ≤ 0.3, based on the Third Fermi-LAT Catalog of High-Energy sources. We specifically focused our analysis on Mrk 421 and Mrk 501, as they are the brightest blazars observed by the HAWC Observatory. With a data set of 2143 days, this work significantly extends the monitoring previously published, which was based on 511 days of observation. By utilizing HAWC data for the VHE γ -ray emission in the 300 GeV–100 TeV energy range, in conjunction with Swift-XRT data for the 0.3–10 keV X-ray emission, we aim to explore potential correlations between these two bands. For Mrk 501, we found evidence of a long-term correlation. Additionally, we identified a period in the light curve where the flux was very low for more than 2 yr. On the other hand, our analysis of Mrk 421 measured a strong linear correlation for quasi-simultaneous observations collected by HAWC and Swift-XRT. This result is consistent with a linear dependence and a multiple-zone synchrotron self-Compton model to explain the X-ray and γ -ray emission. Finally, as suggested by previous findings, we confirm a harder-when-brighter behavior in the spectral evolution of the flux properties for Mrk 421. These findings contribute to the understanding of blazar emissions and their underlying mechanisms. |
| format | Article |
| id | doaj-art-2b67fc53347447a1b96f96a2fed0c861 |
| institution | Kabale University |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj-art-2b67fc53347447a1b96f96a2fed0c8612025-02-07T06:48:55ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-0198018810.3847/1538-4357/ad9d3dStudy of Long-term Spectral Evolution and X-Ray and γ-Ray Correlation of Blazars Seen by HAWCR. Alfaro0C. Alvarez1A. Andrés2J.C. Arteaga-Velázquez3D. Avila Rojas4H.A. Ayala Solares5R. Babu6https://orcid.org/0000-0002-5529-6780E. Belmont-Moreno7https://orcid.org/0000-0003-3207-105XA. Bernal8K.S. Caballero-Mora9T. Capistrán10A. Carramiñana11F. Carreón12S. Casanova13U. Cotti14J. Cotzomi15S. Coutiño de León16E. De la Fuente17D. Depaoli18N. Di Lalla19R. Diaz Hernandez20B.L. Dingus21M.A. DuVernois22M. Durocher23J.C. Díaz-Vélez24K. Engel25https://orcid.org/0000-0001-5737-1820C. Espinoza26https://orcid.org/0000-0001-7074-1726K.L. Fan27N. Fraija28S. Fraija29J.A. García-González30https://orcid.org/0000-0002-4188-5584F. Garfias31A. Gonzalez Muñoz32M.M. González33J.A. Goodman34S. Groetsch35J.P. Harding36S. Hernández-Cadena37I. Herzog38D. Huang39F. Hueyotl-Zahuantitla40A. Iriarte41V. Joshi42S. Kaufmann43D. Kieda44A. Lara45W.H. Lee46J. Lee47H. León Vargas48J.T. Linnemann49A.L. Longinotti50G. Luis-Raya51https://orcid.org/0000-0003-2810-4867K. Malone52O. Martinez53I. Martinez-Castellanos54J. Martínez-Castro55J.A. Matthews56P. Miranda-Romagnoli57https://orcid.org/0000-0002-8390-9011J.A. Montes58E. Moreno59M. Mostafá60A. Nayerhoda61L. Nellen62https://orcid.org/0000-0003-1059-8731M.U. Nisa63R. Noriega-Papaqui64N. Omodei65M. Osorio66Y. Pérez Araujo67E.G. Pérez-Pérez68C.D. Rho69D. Rosa-González70https://orcid.org/0000-0003-1327-0838E. Ruiz-Velasco71H. Salazar72D. Salazar-Gallegos73A. Sandoval74M. Schneider75J. Serna-Franco76A.J. Smith77Y. Son78R.W. Springer79O. Tibolla80K. Tollefson81I. Torres82R. Torres-Escobedo83R. Turner84F. Ureña-Mena85E. Varela86L. Villaseñor87X. Wang88I.J. Watson89K. Whitaker90E. Willox91S. Yun-Cárcamo92H. Zhou93C. de León94HAWC collaborationAbraham D. Falcone95https://orcid.org/0000-0002-5068-7344Fredric Hancock96Instituto de Física, Universidad Nacional Autónoma de México , Ciudad de Mexico, MexicoUniversidad Autónoma de Chiapas , Tuxtla Gutiérrez, Chiapas, MexicoInstituto de Astronomía, Universidad Nacional Autónoma de México , Ciudad de Mexico, Mexico ; magda@astro.unam.mxUniversidad Michoacana de San Nicolás de Hidalgo , Morelia, MexicoInstituto de Física, Universidad Nacional Autónoma de México , Ciudad de Mexico, MexicoDepartment of Physics, Temple University , Philadelphia, PA, USADepartment of Physics, Michigan Technological University , Houghton, MI, USAInstituto de Física, Universidad Nacional Autónoma de México , Ciudad de Mexico, MexicoInstituto de Astronomía, Universidad Nacional Autónoma de México , Ciudad de Mexico, Mexico ; magda@astro.unam.mxUniversidad Autónoma de Chiapas , Tuxtla Gutiérrez, Chiapas, MexicoInstituto de Astronomía, Universidad Nacional Autónoma de México , Ciudad de Mexico, Mexico ; magda@astro.unam.mxInstituto Nacional de Astrofísica , Óptica y Electrónica, Puebla, MexicoInstituto de Astronomía, Universidad Nacional Autónoma de México , Ciudad de Mexico, Mexico ; magda@astro.unam.mxInstytut Fizyki Jadrowej im Henryka Niewodniczanskiego Polskiej Akademii Nauk , IFJ-PAN, Krakow, PolandUniversidad Michoacana de San Nicolás de Hidalgo , Morelia, MexicoFacultad de Ciencias Físico Matemáticas, Benemérita Universidad Autónoma de Puebla , Puebla, MexicoDepartment of Physics, University of Wisconsin–Madison , Madison, WI, USADepartamento de Física, Centro Universitario de Ciencias Exactase Ingenierias, Universidad de Guadalajara , Guadalajara, MexicoMax-Planck Institute for Nuclear Physics , 69117 Heidelberg, GermanyDepartment of Physics, Stanford University , Stanford, CA 94305-4060, USAInstituto Nacional de Astrofísica , Óptica y Electrónica, Puebla, MexicoLos Alamos National Laboratory , Los Alamos, NM, USADepartment of Physics, University of Wisconsin–Madison , Madison, WI, USALos Alamos National Laboratory , Los Alamos, NM, USADepartment of Physics, University of Wisconsin–Madison , Madison, WI, USADepartment of Physics, University of Maryland , College Park, MD, USAInstituto de Física, Universidad Nacional Autónoma de México , Ciudad de Mexico, MexicoDepartment of Physics, University of Maryland , College Park, MD, USAInstituto de Astronomía, Universidad Nacional Autónoma de México , Ciudad de Mexico, Mexico ; magda@astro.unam.mxInstituto de Astronomía, Universidad Nacional Autónoma de México , Ciudad de Mexico, Mexico ; magda@astro.unam.mxTecnologico de Monterrey , Escuela de Ingeniería y Ciencias, Ave. Eugenio Garza Sada 2501, Monterrey, N.L., 64849, Mexico ; anteus79@tec.mxInstituto de Astronomía, Universidad Nacional Autónoma de México , Ciudad de Mexico, Mexico ; magda@astro.unam.mxInstituto de Física, Universidad Nacional Autónoma de México , Ciudad de Mexico, MexicoInstituto de Astronomía, Universidad Nacional Autónoma de México , Ciudad de Mexico, Mexico ; magda@astro.unam.mxDepartment of Physics, University of Maryland , College Park, MD, USADepartment of Physics, Michigan Technological University , Houghton, MI, USALos Alamos National Laboratory , Los Alamos, NM, USATsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University , 800 Dongchuan Rd, Shanghai, SH 200240, People's Republic of ChinaDepartment of Physics and Astronomy, Michigan State University , East Lansing, MI, USADepartment of Physics, University of Maryland , College Park, MD, USAUniversidad Autónoma de Chiapas , Tuxtla Gutiérrez, Chiapas, MexicoInstituto de Astronomía, Universidad Nacional Autónoma de México , Ciudad de Mexico, Mexico ; magda@astro.unam.mxErlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg , Erlangen, GermanyUniversidad Politecnica de Pachuca , Pachuca, Hgo, MexicoDepartment of Physics and Astronomy, University of Utah , Salt Lake City, UT, USAInstituto de Geofísica , Universidad Nacional Autónoma de México, Ciudad de Mexico, MexicoInstituto de Astronomía, Universidad Nacional Autónoma de México , Ciudad de Mexico, Mexico ; magda@astro.unam.mxUniversity of Seoul , Seoul, Republic of KoreaInstituto de Física, Universidad Nacional Autónoma de México , Ciudad de Mexico, MexicoDepartment of Physics and Astronomy, Michigan State University , East Lansing, MI, USAInstituto de Astronomía, Universidad Nacional Autónoma de México , Ciudad de Mexico, Mexico ; magda@astro.unam.mxUniversidad Politecnica de Pachuca , Pachuca, Hgo, MexicoLos Alamos National Laboratory , Los Alamos, NM, USAFacultad de Ciencias Físico Matemáticas, Benemérita Universidad Autónoma de Puebla , Puebla, MexicoNASA Goddard Space Flight Center , Greenbelt, MD 20771, USACentro de Investigación en Computación , Instituto Politécnico Nacional, México City, MexicoDepartment of Physics and Astronomy, University of New Mexico , Albuquerque, NM, USAUniversidad Autónoma del Estado de Hidalgo , Pachuca, MexicoInstituto de Astronomía, Universidad Nacional Autónoma de México , Ciudad de Mexico, Mexico ; magda@astro.unam.mxFacultad de Ciencias Físico Matemáticas, Benemérita Universidad Autónoma de Puebla , Puebla, MexicoDepartment of Physics, Temple University , Philadelphia, PA, USAInstytut Fizyki Jadrowej im Henryka Niewodniczanskiego Polskiej Akademii Nauk , IFJ-PAN, Krakow, PolandInstituto de Ciencias Nucleares, Universidad Nacional Autónoma de Mexico , Ciudad de Mexico, MexicoDepartment of Physics and Astronomy, Michigan State University , East Lansing, MI, USAUniversidad Autónoma del Estado de Hidalgo , Pachuca, MexicoDepartment of Physics, Stanford University , Stanford, CA 94305-4060, USAInstituto de Astronomía, Universidad Nacional Autónoma de México , Ciudad de Mexico, Mexico ; magda@astro.unam.mxInstituto de Física, Universidad Nacional Autónoma de México , Ciudad de Mexico, Mexico; Instituto de Astronomía, Universidad Nacional Autónoma de México , Ciudad de Mexico, Mexico ; magda@astro.unam.mxUniversidad Politecnica de Pachuca , Pachuca, Hgo, MexicoDepartment of Physics, Sungkyunkwan University , Suwon 16419, Republic of KoreaInstituto Nacional de Astrofísica , Óptica y Electrónica, Puebla, MexicoMax-Planck Institute for Nuclear Physics , 69117 Heidelberg, GermanyFacultad de Ciencias Físico Matemáticas, Benemérita Universidad Autónoma de Puebla , Puebla, MexicoDepartment of Physics and Astronomy, Michigan State University , East Lansing, MI, USAInstituto de Física, Universidad Nacional Autónoma de México , Ciudad de Mexico, MexicoDepartment of Physics, University of Maryland , College Park, MD, USAInstituto de Física, Universidad Nacional Autónoma de México , Ciudad de Mexico, MexicoDepartment of Physics, University of Maryland , College Park, MD, USAUniversity of Seoul , Seoul, Republic of KoreaDepartment of Physics and Astronomy, University of Utah , Salt Lake City, UT, USAUniversidad Politecnica de Pachuca , Pachuca, Hgo, MexicoDepartment of Physics and Astronomy, Michigan State University , East Lansing, MI, USAInstituto Nacional de Astrofísica , Óptica y Electrónica, Puebla, MexicoTsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University , 800 Dongchuan Rd, Shanghai, SH 200240, People's Republic of ChinaDepartment of Physics, Michigan Technological University , Houghton, MI, USAInstituto Nacional de Astrofísica , Óptica y Electrónica, Puebla, MexicoFacultad de Ciencias Físico Matemáticas, Benemérita Universidad Autónoma de Puebla , Puebla, MexicoFacultad de Ciencias Físico Matemáticas, Benemérita Universidad Autónoma de Puebla , Puebla, MexicoDepartment of Physics, Michigan Technological University , Houghton, MI, USAUniversity of Seoul , Seoul, Republic of KoreaDepartment of Physics, Temple University , Philadelphia, PA, USADepartment of Physics, University of Maryland , College Park, MD, USADepartment of Physics, University of Maryland , College Park, MD, USATsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University , 800 Dongchuan Rd, Shanghai, SH 200240, People's Republic of ChinaUniversidad Michoacana de San Nicolás de Hidalgo , Morelia, MexicoPennsylvania State University , Astronomy & Astrophysics Department, University Park, PA, USAPennsylvania State University , Astronomy & Astrophysics Department, University Park, PA, USA; Now at University of Illinois Urbana Champaign , Department of Physics, Urbana, IL, USAThe HAWC Observatory collected 6 yr of extensive data, providing an ideal platform for long-term monitoring of blazars in the very high energy (VHE) band, without bias toward specific flux states. HAWC continuously monitors blazar activity at TeV energies, focusing on sources with a redshift of z ≤ 0.3, based on the Third Fermi-LAT Catalog of High-Energy sources. We specifically focused our analysis on Mrk 421 and Mrk 501, as they are the brightest blazars observed by the HAWC Observatory. With a data set of 2143 days, this work significantly extends the monitoring previously published, which was based on 511 days of observation. By utilizing HAWC data for the VHE γ -ray emission in the 300 GeV–100 TeV energy range, in conjunction with Swift-XRT data for the 0.3–10 keV X-ray emission, we aim to explore potential correlations between these two bands. For Mrk 501, we found evidence of a long-term correlation. Additionally, we identified a period in the light curve where the flux was very low for more than 2 yr. On the other hand, our analysis of Mrk 421 measured a strong linear correlation for quasi-simultaneous observations collected by HAWC and Swift-XRT. This result is consistent with a linear dependence and a multiple-zone synchrotron self-Compton model to explain the X-ray and γ -ray emission. Finally, as suggested by previous findings, we confirm a harder-when-brighter behavior in the spectral evolution of the flux properties for Mrk 421. These findings contribute to the understanding of blazar emissions and their underlying mechanisms.https://doi.org/10.3847/1538-4357/ad9d3dActive galactic nucleiHigh energy astrophysicsBlazarsGamma-ray astronomyGamma-ray detectorsGamma-ray observatories |
| spellingShingle | R. Alfaro C. Alvarez A. Andrés J.C. Arteaga-Velázquez D. Avila Rojas H.A. Ayala Solares R. Babu E. Belmont-Moreno A. Bernal K.S. Caballero-Mora T. Capistrán A. Carramiñana F. Carreón S. Casanova U. Cotti J. Cotzomi S. Coutiño de León E. De la Fuente D. Depaoli N. Di Lalla R. Diaz Hernandez B.L. Dingus M.A. DuVernois M. Durocher J.C. Díaz-Vélez K. Engel C. Espinoza K.L. Fan N. Fraija S. Fraija J.A. García-González F. Garfias A. Gonzalez Muñoz M.M. González J.A. Goodman S. Groetsch J.P. Harding S. Hernández-Cadena I. Herzog D. Huang F. Hueyotl-Zahuantitla A. Iriarte V. Joshi S. Kaufmann D. Kieda A. Lara W.H. Lee J. Lee H. León Vargas J.T. Linnemann A.L. Longinotti G. Luis-Raya K. Malone O. Martinez I. Martinez-Castellanos J. Martínez-Castro J.A. Matthews P. Miranda-Romagnoli J.A. Montes E. Moreno M. Mostafá A. Nayerhoda L. Nellen M.U. Nisa R. Noriega-Papaqui N. Omodei M. Osorio Y. Pérez Araujo E.G. Pérez-Pérez C.D. Rho D. Rosa-González E. Ruiz-Velasco H. Salazar D. Salazar-Gallegos A. Sandoval M. Schneider J. Serna-Franco A.J. Smith Y. Son R.W. Springer O. Tibolla K. Tollefson I. Torres R. Torres-Escobedo R. Turner F. Ureña-Mena E. Varela L. Villaseñor X. Wang I.J. Watson K. Whitaker E. Willox S. Yun-Cárcamo H. Zhou C. de León HAWC collaboration Abraham D. Falcone Fredric Hancock Study of Long-term Spectral Evolution and X-Ray and γ-Ray Correlation of Blazars Seen by HAWC The Astrophysical Journal Active galactic nuclei High energy astrophysics Blazars Gamma-ray astronomy Gamma-ray detectors Gamma-ray observatories |
| title | Study of Long-term Spectral Evolution and X-Ray and γ-Ray Correlation of Blazars Seen by HAWC |
| title_full | Study of Long-term Spectral Evolution and X-Ray and γ-Ray Correlation of Blazars Seen by HAWC |
| title_fullStr | Study of Long-term Spectral Evolution and X-Ray and γ-Ray Correlation of Blazars Seen by HAWC |
| title_full_unstemmed | Study of Long-term Spectral Evolution and X-Ray and γ-Ray Correlation of Blazars Seen by HAWC |
| title_short | Study of Long-term Spectral Evolution and X-Ray and γ-Ray Correlation of Blazars Seen by HAWC |
| title_sort | study of long term spectral evolution and x ray and γ ray correlation of blazars seen by hawc |
| topic | Active galactic nuclei High energy astrophysics Blazars Gamma-ray astronomy Gamma-ray detectors Gamma-ray observatories |
| url | https://doi.org/10.3847/1538-4357/ad9d3d |
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studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT jmartinezcastro studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT jamatthews studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT pmirandaromagnoli studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT jamontes studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT emoreno studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT mmostafa studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT anayerhoda studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT lnellen studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT munisa studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT rnoriegapapaqui studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT nomodei studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT mosorio studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT yperezaraujo studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT egperezperez studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT cdrho studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT drosagonzalez studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT eruizvelasco studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT hsalazar studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT dsalazargallegos studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT asandoval studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT mschneider studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT jsernafranco studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT ajsmith studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT yson studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT rwspringer studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT otibolla studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT ktollefson studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT itorres studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT rtorresescobedo studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT rturner studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT furenamena studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT evarela studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT lvillasenor studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT xwang studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT ijwatson studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT kwhitaker studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT ewillox studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT syuncarcamo studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT hzhou studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT cdeleon studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT hawccollaboration studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT abrahamdfalcone studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc AT fredrichancock studyoflongtermspectralevolutionandxrayandgraycorrelationofblazarsseenbyhawc |