Pith Number

pith:2QEULGSA

pith:2009:2QEULGSAM4KO4TLMRYLH5K7YHK

not attested not anchored not stored refs pending

Discovery of the Extremely Energetic Supernova 2008fz

A.J. Drake, A. Mahabal, D. Balam, E. Beshore, J.L. Prieto, M. Catelan, M.J. Graham, R. Williams, S.G. Djorgovski, S. Larson

arxiv:0908.1990 v2 · 2009-08-13 · 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{2QEULGSAM4KO4TLMRYLH5K7YHK}

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	2026-05-18T02:12:34.422391Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d409459a406714ee4d6c8e167eabf83ab1e98cd7d414920531ca01e7bfa9a420

Aliases

arxiv: 0908.1990 · arxiv_version: 0908.1990v2 · doi: 10.48550/arxiv.0908.1990 · pith_short_12: 2QEULGSAM4KO · pith_short_16: 2QEULGSAM4KO4TLM · pith_short_8: 2QEULGSA

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/2QEULGSAM4KO4TLMRYLH5K7YHK \
  | 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: d409459a406714ee4d6c8e167eabf83ab1e98cd7d414920531ca01e7bfa9a420

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "07c113a8261ab0cbe03c2fe09bc56a00b8bda0d9da68796697c9db2fcf4018da",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-08-13T23:06:51Z",
    "title_canon_sha256": "3a011bc788b739209b9205008b1745147bcaae494f7421f5eb92571281a2824a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.1990",
    "kind": "arxiv",
    "version": 2
  }
}