Pith Number

pith:MRQGUUYH

pith:2010:MRQGUUYHFGP6TEPI4F73YU67P6

not attested not anchored not stored refs pending

The nature of V39: an LBV candidate or LBV impostor in the very low metallicity galaxy IC 1613?

A. Herrero, D.J. Lennon, F. Najarro, J.S. Vink, K. Uytterhoeven, M. Garcia, N. Castro

arxiv:1003.0875 v1 · 2010-03-03 · astro-ph.SR · 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{MRQGUUYHFGP6TEPI4F73YU67P6}

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	2026-05-18T02:08:46.810282Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

64606a5307299fe991e8e17fbc53df7f8ccf5c1276210b8eb02792a22480963d

Aliases

arxiv: 1003.0875 · arxiv_version: 1003.0875v1 · doi: 10.48550/arxiv.1003.0875 · pith_short_12: MRQGUUYHFGP6 · pith_short_16: MRQGUUYHFGP6TEPI · pith_short_8: MRQGUUYH

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/MRQGUUYHFGP6TEPI4F73YU67P6 \
  | 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: 64606a5307299fe991e8e17fbc53df7f8ccf5c1276210b8eb02792a22480963d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "86df33ad055ff91abd3a5e434279eaf494197c7f920a0494b1a9794af276035c",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2010-03-03T18:47:01Z",
    "title_canon_sha256": "639e941ec75aa1ded90ef4c9a44a8276dde6bbf6d2399b940a5b8368efdbe03e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1003.0875",
    "kind": "arxiv",
    "version": 1
  }
}