Pith Number

pith:XAHQS4P6

pith:2009:XAHQS4P6HMKGYKM6IID2JKXM3A

not attested not anchored not stored refs pending

Discovery of CIV Emission Filaments in M87

J.E. Pringle, M. Cracraft, M. Donahue, M. Voit, R. Carswell, R.G. Martin, W.B. Sparks

arxiv:0909.2063 v1 · 2009-09-10 · 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{XAHQS4P6HMKGYKM6IID2JKXM3A}

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	2026-05-18T02:34:30.444796Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b80f0971fe3b146c299e4207a4aaecd83343150e528dca88e03ccd9f966b92c1

Aliases

arxiv: 0909.2063 · arxiv_version: 0909.2063v1 · doi: 10.48550/arxiv.0909.2063 · pith_short_12: XAHQS4P6HMKG · pith_short_16: XAHQS4P6HMKGYKM6 · pith_short_8: XAHQS4P6

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/XAHQS4P6HMKGYKM6IID2JKXM3A \
  | 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: b80f0971fe3b146c299e4207a4aaecd83343150e528dca88e03ccd9f966b92c1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a995157b40e0b96acee7f35cc34b771c56d5ea98a99412b68129347ef27b105c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-09-10T23:00:39Z",
    "title_canon_sha256": "2092f584fe20952d34d810b60fbef0bf684b7317df83d33cb5e96bed1737b52e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.2063",
    "kind": "arxiv",
    "version": 1
  }
}