Pith Number

pith:7UWDJM5L

pith:2003:7UWDJM5LMOZPSY6RVWBXBN2A2G

not attested not anchored not stored refs pending

HII regions in the spiral galaxy NGC 3389

2), Cairo, Egypt. 3- Astrophysikalisches Institut Potsdam, Geophysics, Germany), Hamed Abdel-Hamid (1, Korea. 2- National Research Institute of Astronomy, Peter Notni (3) (1- Astronomy Program, Potsdam, Sang-Gak Lee (1), SEES, Seoul, Soeul National University

arxiv:astro-ph/0306153 v2 · 2003-06-07 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7UWDJM5LMOZPSY6RVWBXBN2A2G}

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	2026-05-18T00:52:34.990360Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fd2c34b3ab63b2f963d1ad8370b740d194a9004964cad28bee3a2f10e8aceb5f

Aliases

arxiv: astro-ph/0306153 · arxiv_version: astro-ph/0306153v2 · doi: 10.48550/arxiv.astro-ph/0306153 · pith_short_12: 7UWDJM5LMOZP · pith_short_16: 7UWDJM5LMOZPSY6R · pith_short_8: 7UWDJM5L

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/7UWDJM5LMOZPSY6RVWBXBN2A2G \
  | 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: fd2c34b3ab63b2f963d1ad8370b740d194a9004964cad28bee3a2f10e8aceb5f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "29e8690b2092f08ef1db179df9e8eb5a8bea0bfeb852b8923edaad96b9398d23",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-06-07T11:00:42Z",
    "title_canon_sha256": "4bb16c78f01892570250f9e60c7c5f3b1c416db3cc3b2119a94a375fabe49d75"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0306153",
    "kind": "arxiv",
    "version": 2
  }
}