Pith Number

pith:J5JDDRBA

pith:2003:J5JDDRBACQIZ34AAIF6GTZTAEI

not attested not anchored not stored refs pending

Supersoft X-ray Sources in M31: I. A Chandra Survey and an Extension to Quasisoft Sources

A.K.H. Kong, B.F. Williams, F.A. Primini, J. Greiner, M.R. Garcia, P. Barmby, P. Massey, P.W. Hodge, R. Di Stefano, S. Curry, S.S. Murrary, T.A. Russo

arxiv:astro-ph/0306440 v3 · 2003-06-22 · 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{J5JDDRBACQIZ34AAIF6GTZTAEI}

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	2026-07-04T16:52:01.723103Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4f5231c42014119df000417c69e6602237f4d381b30ba34dcfb9188b92c3ba15

Aliases

arxiv: astro-ph/0306440 · arxiv_version: astro-ph/0306440v3 · doi: 10.48550/arxiv.astro-ph/0306440 · pith_short_12: J5JDDRBACQIZ · pith_short_16: J5JDDRBACQIZ34AA · pith_short_8: J5JDDRBA

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/J5JDDRBACQIZ34AAIF6GTZTAEI \
  | 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: 4f5231c42014119df000417c69e6602237f4d381b30ba34dcfb9188b92c3ba15

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4c4b9282482672a620931eae141b0f3e96937ef66dda0fc5345b6afeb7dcf65c",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-06-22T19:10:30Z",
    "title_canon_sha256": "3bb5ee2fb632318ed9907c9d2c2519588604d5e45d2023bb90125439fb121959"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0306440",
    "kind": "arxiv",
    "version": 3
  }
}