Pith Number

pith:42EPJOEW

pith:2009:42EPJOEWC5JK3DR27IZBT6HDMW

not attested not anchored not stored refs pending

X-Ray Spectroscopy of Stars

Belgium), M. Guedel (ETH Zurich, Switzerland), Y. Naze (Univ. Liege

arxiv:0904.3078 v2 · 2009-04-20 · astro-ph.SR · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{42EPJOEWC5JK3DR27IZBT6HDMW}

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	2026-07-04T15:47:35.826840Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e688f4b8961752ad8e3afa3219f8e365a6a5c1fc79bf0623490f274a8b46778c

Aliases

arxiv: 0904.3078 · arxiv_version: 0904.3078v2 · doi: 10.48550/arxiv.0904.3078 · pith_short_12: 42EPJOEWC5JK · pith_short_16: 42EPJOEWC5JK3DR2 · pith_short_8: 42EPJOEW

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/42EPJOEWC5JK3DR27IZBT6HDMW \
  | 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: e688f4b8961752ad8e3afa3219f8e365a6a5c1fc79bf0623490f274a8b46778c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "52fecb0de18f5070bc359d9a2529e7316d4a69cbe2a1742d69c8b53694f01892",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-04-20T19:27:39Z",
    "title_canon_sha256": "138086116552ebbd163e724f0b3c6c30678a13f5755775a6a307446656ee5b98"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.3078",
    "kind": "arxiv",
    "version": 2
  }
}