Mrk 501

[References]

Whipple: Quinn, J. et al., ApJ 456, L83 (1996)
            Quinn, J. et al., ApJ 518, 693-698 (1999)
            A. Pichel et al., ICRC2009 / arXiv+0908.0010

HEGRA: Bradbury, S.M. et al., A&A 320, L5-L8 (1997)
            Aharonian, F. et al., A&A 327, L5-L8 (1997)
            Kranich, D. et al., Astropart. Phys. 12, 65-74 (1999)
            Aharonian, F.A. et al., A&A 342, 69-86 (1999)
            Aharonian, F.A. et al., A&A 349, 11-28 (1999)
            Aharonian, F. et al., A&A 349, 29-44 (1999)
            Aharonian, F. et al., ApJ 546, 898-902 (2001)

7TA: Hayashida, N. et al., ApJ 504, L71 (1998)
       Yamamoto, T. et al. Astropart. Phys. 11, 141 (1999)

CAT: Djannati-Atai , A. et al., A&A 350, 17-24 (1999)
        Piron, F. et al., A&A 374, 895-906 (2001)

Milagrito: Atkins, R. et al., ApJ 525, L25-L28 (1999)

Durham: Chadwick, P.M. et al., J. Phys. G: Nucl. Phys. 25, 1749-1753 (1999)

CAT: Piron, F. et al., Astron. Astrophys. 374, 895-906 (2001)

CELESTE: Smith, D.A. et al., Nuclear Physics B Proc. Suppl. 80, 163-172 (2000)

Tibet AS-gamma: Amenomori, M. et al., ApJ 532, 302-307 (2000)

MAGIC: Albert, J. et al., ApJ 669, 862-883 (2007)
           Albert, J. et al., ApJ 669,, L17 (2007)
           F.Goebel et al., 30th ICRC (2007) / arXiv:0709.2032 [astro-ph]
           H. Anderhub et al., ApJ 705, 1624 (2009)
           R. Wagner et al., ICRC 2011 / arXiv:1109.6774 [astro-ph]

MAGIC/H.E.S.S.: M. Hayashida et al., 30th ICRC (2007) / arXiv:0710.4057 [astro-ph] p.149

MAGIC/VERITAS et al., J. Aleksic et al., arXiv:1410.6391 [astro-ph]

VERITAS: S.Fegan et al., 30th ICRC (2007) / arXiv:0709.3659 [astro-ph]
              A.A. Abdo et al., ApJ 727, 129 (2011)
              A. Pichel et al., ICRC 2011 / arXiv:1110.2549 [astro-ph]
              E. Aliu et al., arXiv:1608.01569 [astro-ph]

VERITAS/MAGIC: V.A. Acciari et al., ApJ 729, 2 (2010)

TACTIC: S. V. Godambe et al., J. Phys. G. 35, 065202 (2008)
            P. Chandra et al., New Astronomy 54C, 42-51 (2017)

Fermi-LAT/MAGIC/VERITAS/GASP-WEBT: arXiv:1011.5260 [astro-ph]

Fermi-LAT/MAGIC/VERITAS: U. Barres de Almeida et al., ICRC 2011 / arXiv:1109.5887

VERITAS/Fermi-LAT: A. Pichel et al., ICRC 2011 / arXiv:1110.2549

H.E.S.S./FACT: G. Cologna et al., Gamma 2016 / arXiv:16110.03983

H.E.S.S.: H. Abdalla et al., arXiv:1901.05209

HAWC: A.U. Abeysekara et al., arXiv:1703.06968 [astro-ph]