Pith Number

pith:5VBQYVMY

pith:2009:5VBQYVMY4ZDNIYLU44L7LWWGIW

not attested not anchored not stored refs pending

Optical Spectroscopy of the Somewhat Peculiar Type IIb Supernova 2001ig

Alejandro Clocchiatti, Alexei V. Filippenko, Jeffrey M. Silverman, Mark M. Phillips, Mohan Ganeshalingam, Paolo Mazzali, Ryan Chornock, Ryan J. Foley

arxiv:0903.4179 v2 · 2009-03-24 · astro-ph.CO · astro-ph.HE · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5VBQYVMY4ZDNIYLU44L7LWWGIW}

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	2026-05-18T02:14:26.141916Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ed430c5598e646d46174e717f5dac6459dd0bc00c6a6a2543cf206cebb1dc8ec

Aliases

arxiv: 0903.4179 · arxiv_version: 0903.4179v2 · doi: 10.48550/arxiv.0903.4179 · pith_short_12: 5VBQYVMY4ZDN · pith_short_16: 5VBQYVMY4ZDNIYLU · pith_short_8: 5VBQYVMY

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/5VBQYVMY4ZDNIYLU44L7LWWGIW \
  | 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: ed430c5598e646d46174e717f5dac6459dd0bc00c6a6a2543cf206cebb1dc8ec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6c1fb595befa9f2fefc6e7bbc4673f92a9d7d2f58486f0407ff7304c24ca5f64",
    "cross_cats_sorted": [
      "astro-ph.HE",
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-03-24T20:01:47Z",
    "title_canon_sha256": "92a437e522e1204097ca8bcf42ef419fd953d02bda3b58d985312a08efc645fc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.4179",
    "kind": "arxiv",
    "version": 2
  }
}