Pith Number

pith:G7M2V2B5

pith:2009:G7M2V2B5O5RL56LSAHFANTBQ3S

not attested not anchored not stored refs pending

The diverse X-ray properties of four truly isolated elliptical galaxies: NGC 2954, NGC 6172, NGC 7052, and NGC 7785

Anna Wolter, Birgit Kelm, Elisabetta Memola, Ginevra Trinchieri, Paola Focardi

arxiv:0902.3611 v2 · 2009-02-20 · 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{G7M2V2B5O5RL56LSAHFANTBQ3S}

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	2026-07-04T15:41:18.309287Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

37d9aae83d7762bef97201ca06cc30dc84fce97d9db3f4b6f59fa1f5d720c58d

Aliases

arxiv: 0902.3611 · arxiv_version: 0902.3611v2 · doi: 10.48550/arxiv.0902.3611 · pith_short_12: G7M2V2B5O5RL · pith_short_16: G7M2V2B5O5RL56LS · pith_short_8: G7M2V2B5

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/G7M2V2B5O5RL56LSAHFANTBQ3S \
  | 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: 37d9aae83d7762bef97201ca06cc30dc84fce97d9db3f4b6f59fa1f5d720c58d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a55684018bbabce3b24b74385f318924fee6258760ac957433eae9d21d91f6d1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-02-20T16:16:05Z",
    "title_canon_sha256": "a07859ff8ab6505b1570ebf5c9802a8b5efdc08f0bf83974ca9132f5785a8b22"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.3611",
    "kind": "arxiv",
    "version": 2
  }
}