Pith Number

pith:PTSWB7W2

pith:2026:PTSWB7W2RQZ4EJUKTZRWIUW4LZ

not attested not anchored not stored refs resolved

The January 2010 flare of Mrk421: Insights from a stochastic acceleration model

A. Abhishek, A. Aguasca-Cabot, A. Arbet-Engels, A. Babi\'c, A. Berti, A. Biland, A. Campoy-Ordaz, A. Carosi, A. Cervi\~no, A. Cifuentes Santos, A. De Angelis, A. Dinesh, A. Donini, A. Hahn, A. Lamastra, A. L\'opez-Oramas, A. Moralejo, A. Negro, A. Okumura, A. Roy, A. Sciaccaluga, A. Simongini, A. Stamerra, A. Tramacere, A. Tutone, A. Vigliano, B. De Lotto, C. Arcaro, C. Bakshi, C. Bigongiari, C. Delgado Mendez, C. F. Vigorito, C. Nanci, C. Nigro, C. Walther, D. Cerasole, D. Dominis Prester, D. Dorner, D. Elsaesser, D. Hadasch, D. Hrupec, D. Israyelyan, D. Mazin, D. Miceli, D. Paneque, D. Sobczynska, D. Strom, E. Bernardini, E. Bronzini, E. Lindfors, E. Lyard, E. Molina, E. Prandini, E. Visentin, F. Dazzi, F. Di Pierro, F. Fr\'ias Garc\'ia-Lago, F. Giordano, F. G. Saturni, F. Longo, F. Podobnik, F. Schiavone, F. Schmuckermaier, F. Wersig, G. Bonnoli, G. Ceribella, G. Chon, G. D'Amico, G. Harutyunyan, G. Maneva, G. Pirola, G. Silvestri, G. Verna, G. W. Kluge, H. A. Mondal, H. Kubo, I. Agudo, I. Albanese, I. Batkovi\'c, I. Burelli, I. Jim\'enez Mart\'inez, I. Viale, I. Vovk, J. A. Barrio, J. Abhir, J. Baxter, J. Becerra Gonz\'alez, J. Bernete, J. Besenrieder, J. Cortina, J. Delgado, J. G. Giesbrecht Paiva, J. G. Green, J. Herrera Llorente, J. Jahanvi, J. Jim\'enez Quiles, J. Jormanainen, J. Konrad, J. Kushida, J. L. Contreras, J. M\'endez Gallego, J. M. Miranda, J. M. Paredes, J. Otero-Santos, J. Rico, J. Sitarek, J. Stri\v{s}kovi\'c, J. Tartera Barber\`a, K. Nilsson, K. Schmitz, L. A. Antonelli, L. Barrios-Jim\'enez, L. Di Venere, L. Eisenberger, L. Foffano, L. Font, L. Luli\'c, L. Nikoli\'c, MAGIC collaboration: K. Abe, M. Carretero-Castrillo, M. Delfino, M. Doro, M. Gaug, M. L\'ainez, M. L\'opez-Moya, M. Makariev, M. Mallamaci, M. Manganaro, M. Mariotti, M. Mart\'inez, M. Molero Gonz\'alez, M. Nievas Rosillo, M. Peresano, M. Perri, M. Persic, M. Pihet, M. Rib\'o, M. Takahashi, M. Teshima, M. Vazquez Acosta, M. Vorbrugg, N. Giglietto, N. Sahakyan, O. Blanch, P. Da Vela, P. Gliwny, P. G. Prada Moroni, P. G\"unther, P. K. H. Yeung, P. Majumdar, P. Maru\v{s}evec, P. M. Kouch, P. Temnikov, R. Carosi, R. de Menezes, R. Di Tria, R. Grau, R. L\'opez-Coto, R. Mirzoyan, R. Paoletti, R. Takeishi, R. Walter, S. Abe, S. Covino, S. Garc\'ia Soto, S. Gasparyan, S. Kankkunen, S. Lombardi, S. Loporchio, S. Mangano, S. Menchiari, S. Menon, S. Nozaki, S. Paiano, S. Ubach, S. Ventura, T. Aniello, T. Gradetzke, T. Hassan, T. Kayanoki, T. Terzi\'c, T. T. H. Arnesen, U. Barres de Almeida, V. A. Acciari, V. Neustroev, V. Sliusar, V. Vitale, \v{Z}. Bo\v{s}njak, W. Bednarek, W. Rhode, Y. Chai, Y. Fukazawa, Y. Suda

Spectral variability in Mrk 421's January 2010 flare aligns with stochastic acceleration of particles.

arxiv:2604.20480 v1 · 2026-04-22 · astro-ph.HE · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PTSWB7W2RQZ4EJUKTZRWIUW4LZ}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

We find the spectral variability to be well in agreement with stochastic acceleration. Our analysis suggests that the standard LPPL distribution develops a Maxwellian pile-up component at the transition from acceleration to cooling dominated phase on 3 nights in the dataset.

C2weakest assumption

That the observed SED evolution and cross-band correlations can be fully captured by a single-zone leptonic model using LPPL plus pile-up distributions without significant contributions from multi-zone emission, hadronic processes, or external photon fields.

C3one line summary

The January 2010 flare of Mrk421 shows spectral variability consistent with stochastic acceleration, including development of a Maxwellian pile-up component in the particle distribution on three nights.

References

63 extracted · 63 resolved · 4 Pith anchors

[1] Reviews of Modern Physics , year = 1970, month = jan, volume = 1970 · doi:10.1103/revmodphys.42.237

[2] A new pile-up mechanism for relativistic electronspectra

[3] A viable mechanism to establish relativistic thermal particle distribution functions in cosmic sources. , keywords =

[4] Cosmic-Ray Transport and Acceleration. I. Derivation of the Kinetic Equation and Application to Cosmic Rays in Static Cold Media. , keywords =. doi:10.1086/167009 , adsurl = · doi:10.1086/167009

[5] Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds · doi:10.1086/305772

Cited by

1 paper in Pith

Spin-wave hybridization in bismuth iron garnet Mie spheres induced by the inverse Faraday effect

Receipt and verification

First computed	2026-06-29T01:14:32.195093Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7ce560feda8c33c2268a9e636452dc5e45e6b9c901b80ead280384aa940af76e

Aliases

arxiv: 2604.20480 · arxiv_version: 2604.20480v1 · doi: 10.48550/arxiv.2604.20480 · pith_short_12: PTSWB7W2RQZ4 · pith_short_16: PTSWB7W2RQZ4EJUK · pith_short_8: PTSWB7W2

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/PTSWB7W2RQZ4EJUKTZRWIUW4LZ \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 7ce560feda8c33c2268a9e636452dc5e45e6b9c901b80ead280384aa940af76e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "76f88722fa06e4ebb2d2407780d9146105200fc1c081e186036d36bc741390ba",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2026-04-22T12:09:40Z",
    "title_canon_sha256": "786a5a68f1918f8cebea0798be58f679f3a5ecf44c35fbc331be05e43b6becbb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.20480",
    "kind": "arxiv",
    "version": 1
  }
}