Pith Number

pith:QQIT575X

pith:2009:QQIT575XWSIPTHWTXK7KEOKCQB

not attested not anchored not stored refs pending

VERITAS observations of the BL Lac 1ES 1218+304

A. Cesarini, A.D. Falcone, A. Furniss, A. Imran, A. Konopelko, A. McCann, A. Weinstein, A.W. Smith, B. Zitzer, C.M. Hui, D.A. Williams, D.B. Kieda, D. Hanna, D. Horan, D. Pandel, D. Steele, E. Aliu, E. Hays, F. Krennrich, G. Gyuk, G.H. Gillanders, G.H. Sembroski, G. Maier, H.J. Rose, H. Krawczynski, J.A. Toner, J.E. Ward, J. Grube, J.H. Buckley, J. Holder, J. Kildea, J. Niemiec, J.P. Finley, J. Quinn, J.S. Perkins, K.L. Byrum, K. Ragan, L. Ciupik, L.C. Reyes, L.F. Fortson, L. Valcarcel, M. Beilicke, M.J. Lang, M.K. Daniel, M. Kertzman, M. McCutcheon, M. Pohl, M. Schroedter, M. Wood, N. Karlsson, O. Celik, P. Cogan, P. Colin, P. Fortin, P. Kaaret, P. Moriarty, P.T. Reynolds, R.A. Ong, R. Guenette, R.J. White, R. Mukherjee, R. Wagner, S.A. Wissel, S.J. Fegan, S. LeBohec, S.M. Bradbury, S.P. Swordy, S.P. Wakely, T. Arlen, T.B. Humensky, T.C. Weekes, T. Ergin, T. Nagai, V. Bugaev, VERITAS Collaboration: V.A. Acciari, V.V. Vassiliev, W. Benbow, W. Cui, Y. Butt, Y.C.K. Chow

arxiv:0901.4561 v1 · 2009-01-28 · astro-ph.HE · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QQIT575XWSIPTHWTXK7KEOKCQB}

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.

Receipt and verification

First computed	2026-05-18T02:35:01.576439Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

84113effb7b490f99ed3babea239428049f5501fad896df1b20b6c10a66f8a38

Aliases

arxiv: 0901.4561 · arxiv_version: 0901.4561v1 · doi: 10.48550/arxiv.0901.4561 · pith_short_12: QQIT575XWSIP · pith_short_16: QQIT575XWSIPTHWT · pith_short_8: QQIT575X

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/QQIT575XWSIPTHWTXK7KEOKCQB \
  | 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: 84113effb7b490f99ed3babea239428049f5501fad896df1b20b6c10a66f8a38

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0ac0875e805e63f61ea449df1f10d49233ff09fb56084e1b37a5773a1443a3b2",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-01-28T21:50:59Z",
    "title_canon_sha256": "3cc2ce8950fee07239534242942b04026b32a69e01a7c6180f999078fb69c33f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.4561",
    "kind": "arxiv",
    "version": 1
  }
}