Pith Number

pith:OUPFIW6D

pith:2010:OUPFIW6DXHUKCBKELRE6EQHGC6

not attested not anchored not stored refs pending

A Very Large Telescope imaging and spectroscopic survey of the Wolf-Rayet population in NGC 7793

J. L. Bibby, P. A. Crowther (Sheffield)

arxiv:1004.1549 v1 · 2010-04-09 · 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{OUPFIW6DXHUKCBKELRE6EQHGC6}

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	2026-05-18T02:08:07.438663Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

751e545bc3b9e8a105445c49e240e617a9e741e3907f2ce96a20b9f089d59be3

Aliases

arxiv: 1004.1549 · arxiv_version: 1004.1549v1 · doi: 10.48550/arxiv.1004.1549 · pith_short_12: OUPFIW6DXHUK · pith_short_16: OUPFIW6DXHUKCBKE · pith_short_8: OUPFIW6D

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/OUPFIW6DXHUKCBKELRE6EQHGC6 \
  | 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: 751e545bc3b9e8a105445c49e240e617a9e741e3907f2ce96a20b9f089d59be3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "28d613e048f00e4be50dfc245285b8e7a20480261420d9409749b17c3d43799e",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2010-04-09T13:08:55Z",
    "title_canon_sha256": "0c2f7b6e177622326df824f2886f4b07bbb9aea9f63378a728b422fd783966d2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1004.1549",
    "kind": "arxiv",
    "version": 1
  }
}