Pith Number

pith:53SPG25V

pith:2020:53SPG25VCH5E6KA3ZBT6BGLJP4

not attested not anchored not stored refs pending

Wolf-Rayet stars in M81 using GTC/OSIRIS: 7 new detections, analysis and classification of the full sample

C. Alvarez, D. Rosa-Gonz\'alez, J.A. Toal\'a, L. H. Rodr\'iguez-Merino, V.M.A. G\'omez-Gonz\'alez, Y.D. Mayya

arxiv:2002.02558 v1 · 2020-02-06 · astro-ph.SR · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{53SPG25VCH5E6KA3ZBT6BGLJP4}

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	2026-07-05T00:41:58.748807Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

eee4f36bb511fa4f281bc867e099697f22fe1bc36666d8eaa5d758a9b9537878

Aliases

arxiv: 2002.02558 · arxiv_version: 2002.02558v1 · doi: 10.48550/arxiv.2002.02558 · pith_short_12: 53SPG25VCH5E · pith_short_16: 53SPG25VCH5E6KA3 · pith_short_8: 53SPG25V

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/53SPG25VCH5E6KA3ZBT6BGLJP4 \
  | 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: eee4f36bb511fa4f281bc867e099697f22fe1bc36666d8eaa5d758a9b9537878

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aa841309116e75a8585f48d91fe1d6d2f32147aa507d27acb10a5fb386dac70d",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2020-02-06T23:56:57Z",
    "title_canon_sha256": "c82177ab6e2e45fca4602a14e3307810d0ac4748eb27d92483c8cd90cf2d8ccf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2002.02558",
    "kind": "arxiv",
    "version": 1
  }
}