Pith Number

pith:GVYXDXDE

pith:1995:GVYXDXDE2UF67WA73YWQHZ4MBT

not attested not anchored not stored refs pending

Spectral Indices in Cooling Flow Galaxies: Evidence for Star Formation

A. Aragon-Salamanca, J. Gorgas, N. Cardiel

arxiv:astro-ph/9505135 v1 · 1995-05-30 · 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{GVYXDXDE2UF67WA73YWQHZ4MBT}

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	2026-05-18T01:40:23.353177Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

357171dc64d50befd81fde2d03e78c0cf87c6e202cd8fbdf9d2d87b4c9fb5584

Aliases

arxiv: astro-ph/9505135 · arxiv_version: astro-ph/9505135v1 · doi: 10.48550/arxiv.astro-ph/9505135 · pith_short_12: GVYXDXDE2UF6 · pith_short_16: GVYXDXDE2UF67WA7 · pith_short_8: GVYXDXDE

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/GVYXDXDE2UF67WA73YWQHZ4MBT \
  | 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: 357171dc64d50befd81fde2d03e78c0cf87c6e202cd8fbdf9d2d87b4c9fb5584

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "65a4dd7e241d25dde0172b8d04f708bf9ad79d80958383fa9ca4cdd7b473adfc",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1995-05-30T07:49:51Z",
    "title_canon_sha256": "67e53eb8faf85ed4cc853ebb07af718247bd68af0653d3377859aba6f88788e2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9505135",
    "kind": "arxiv",
    "version": 1
  }
}