Pith Number

pith:2CUJUG3Z

pith:2012:2CUJUG3ZYLB4BAZ2WMF4KXVE5T

not attested not anchored not stored refs pending

Evolution of the spectral curvature in the ULX Holmberg II X-1

F. Gris\'e, J. J. E. Kajava, J. Poutanen, P. Kaaret, S. A. Farrell

arxiv:1202.1102 v1 · 2012-02-06 · astro-ph.HE · 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{2CUJUG3ZYLB4BAZ2WMF4KXVE5T}

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	2026-05-18T03:55:35.335787Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d0a89a1b79c2c3c0833ab30bc55ea4ecdda299dfb0e44fdc06c4b1dd2945a291

Aliases

arxiv: 1202.1102 · arxiv_version: 1202.1102v1 · doi: 10.48550/arxiv.1202.1102 · pith_short_12: 2CUJUG3ZYLB4 · pith_short_16: 2CUJUG3ZYLB4BAZ2 · pith_short_8: 2CUJUG3Z

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/2CUJUG3ZYLB4BAZ2WMF4KXVE5T \
  | 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: d0a89a1b79c2c3c0833ab30bc55ea4ecdda299dfb0e44fdc06c4b1dd2945a291

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "65c5265814ff25579c5090ceaec7254e8f098af0cf57bba972b7def3f36de290",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2012-02-06T11:23:40Z",
    "title_canon_sha256": "846155a1ff612409ee1eb76db0f89fbb412fed30db5a6f9c4313e136e46f43b5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.1102",
    "kind": "arxiv",
    "version": 1
  }
}