Pith. sign in

REVIEW

VERITAS Discovery of >200GeV Gamma-ray Emission from the Intermediate-frequency-peaked BL Lac Object W Comae

Not yet reviewed by Pith; the record is open.

Re-run · record.json Download PDF Read on arXiv ↗

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv 0808.0889 v2 pith:3PNANKVZ submitted 2008-08-06 astro-ph

VERITAS Discovery of >200GeV Gamma-ray Emission from the Intermediate-frequency-peaked BL Lac Object W Comae

VERITAS Collaboration: V. A. Acciari , E. Aliu , M. Beilicke , W. Benbow , M. Boettcher , S. M. Bradbury , J. H. Buckley , V. Bugaev
show 74 more authors
Y. Butt O. Celik A. Cesarini L. Ciupik Y. C. K. Chow P. Cogan P. Colin W. Cui M. K. Daniel T. Ergin A. D. Falcone S. J. Fegan J. P. Finley G. Finnegan P. Fortin L. F. Fortson A. Furniss D. Gall G. H. Gillanders J. Grube R. Guenette G. Gyuk D. Hanna E. Hays J. Holder D. Horan C. M. Hui T. B. Humensky A. Imran P. Kaaret N. Karlsson M. Kertzman D. B. Kieda A. Konopelko H. Krawczynski F. Krennrich M. J. Lang S. LeBohec K. Lee G. Maier A. McCann M. McCutcheon P. Moriarty R. Mukherjee T. Nagai J. Niemiec R. A. Ong D. Pandel J. S. Perkins D. Petry M. Pohl J. Quinn K. Ragan L. C. Reyes P. T. Reynolds E. Roache H. J. Rose M. Schroedter G. H. Sembroski A. W. Smith D. Steele S. P. Swordy J. A. Toner V. V. Vassiliev R. Wagner S. P. Wakely J. E. Ward T. C. Weekes A. Weinstein R. J. White D. A. Williams S. A. Wissel M. Wood B. Zitzer
This is my paper
classification astro-ph
keywords emissiongamma-rayveritascomaedataduringenergyflare
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
0 comments
Share X Bluesky LinkedIn Reddit HN
read the original abstract

We report the detection of very high-energy gamma-ray emission from the intermediate-frequency-peaked BL Lacertae object W Comae (z=0.102) by VERITAS. The source was observed between January and April 2008. A strong outburst of gamma-ray emission was measured in the middle of March, lasting for only four days. The energy spectrum measured during the two highest flare nights is fit by a power-law and is found to be very steep, with a differential photon spectral index of Gamma = 3.81 +- 0.35_stat +- 0.34_syst. The integral photon flux above 200GeV during those two nights corresponds to roughly 9% of the flux from the Crab Nebula. Quasi-simultaneous Swift observations at X-ray energies were triggered by the VERITAS observations. The spectral energy distribution of the flare data can be described by synchrotron-self-Compton (SSC) or external-Compton (EC) leptonic jet models, with the latter offering a more natural set of parameters to fit the data.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.