Pith Number

pith:IB3AMXOI

pith:2017:IB3AMXOIATNPFIE4JDH2HFTS7Q

not attested not anchored not stored refs pending

NGC 1980 is not a foreground population of Orion: Spectroscopic survey of young stars with low extinction in Orion A

Aurora Sicilia-Aguilar, Carlos Eiroa, D\'aniel Apai, Hongchi Wang, Ilaria Pascucci, Jinyoung Serena Kim, Lan Zhang, Miguel Alonso-Mart\'inez, Min Fang

arxiv:1703.06948 v1 · 2017-03-20 · astro-ph.SR · astro-ph.GA

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

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	2026-05-18T00:47:00.538982Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4076065dc804daf2a09c48cfa39672fc1bcf90bc3d04cf9074ed63032963e82b

Aliases

arxiv: 1703.06948 · arxiv_version: 1703.06948v1 · doi: 10.48550/arxiv.1703.06948 · pith_short_12: IB3AMXOIATNP · pith_short_16: IB3AMXOIATNPFIE4 · pith_short_8: IB3AMXOI

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/IB3AMXOIATNPFIE4JDH2HFTS7Q \
  | 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: 4076065dc804daf2a09c48cfa39672fc1bcf90bc3d04cf9074ed63032963e82b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ed53a237ea0fa53d1fccfda161f1e9ef4fa6938d29ee2f04aac194c3cc2cc52c",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2017-03-20T20:08:29Z",
    "title_canon_sha256": "712a2cc863571a6a96e1909f72cb4d2a013e8d3bfc28dc32e6345c3d26911551"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1703.06948",
    "kind": "arxiv",
    "version": 1
  }
}