Pith Number

pith:6DUJBIET

pith:2013:6DUJBIET4ZOVPLTBG3WSUVCU5P

not attested not anchored not stored refs pending

Discovery of periodic modulations in the optical spectra of galaxies, possibly due to ultra-rapid light bursts from their massive central black hole

Ermanno F. Borra

arxiv:1308.5611 v1 · 2013-08-26 · astro-ph.CO · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6DUJBIET4ZOVPLTBG3WSUVCU5P}

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	2026-05-18T01:47:58.469611Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f0e890a093e65d57ae6136ed2a5454ebcd155f1ae45540f5cdd4c2fdcc201133

Aliases

arxiv: 1308.5611 · arxiv_version: 1308.5611v1 · doi: 10.48550/arxiv.1308.5611 · pith_short_12: 6DUJBIET4ZOV · pith_short_16: 6DUJBIET4ZOVPLTB · pith_short_8: 6DUJBIET

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/6DUJBIET4ZOVPLTBG3WSUVCU5P \
  | 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: f0e890a093e65d57ae6136ed2a5454ebcd155f1ae45540f5cdd4c2fdcc201133

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9fa6486f5dfb4e3f22570bc79a7053ac9851abb5fc4d65974b6634a56ee4033a",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-08-26T15:13:54Z",
    "title_canon_sha256": "deeecccbc4116cd4cfaf2dd58f694a7c5a95fca543af6863e39c8dcb4613d7e3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.5611",
    "kind": "arxiv",
    "version": 1
  }
}