Pith Number

pith:FEYYTPKJ

pith:2009:FEYYTPKJILKVVRRPFBYQ5UIU4F

not attested not anchored not stored refs pending

The ultraluminous X-ray source population of NGC 4485/4490

J. C. Gladstone, T. P. Roberts

arxiv:0904.3852 v1 · 2009-04-24 · 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{FEYYTPKJILKVVRRPFBYQ5UIU4F}

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	2026-05-18T02:13:57.563231Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

293189bd4942d55ac62f28710ed114e1586ea0ef6e1ee6650f224c599922abb7

Aliases

arxiv: 0904.3852 · arxiv_version: 0904.3852v1 · doi: 10.48550/arxiv.0904.3852 · pith_short_12: FEYYTPKJILKV · pith_short_16: FEYYTPKJILKVVRRP · pith_short_8: FEYYTPKJ

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/FEYYTPKJILKVVRRPFBYQ5UIU4F \
  | 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: 293189bd4942d55ac62f28710ed114e1586ea0ef6e1ee6650f224c599922abb7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "90a4f7acaae210ca38811cddc1afc1cb8a0cf10d8fa2e0055ec2c525b8e0e35d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-04-24T12:11:20Z",
    "title_canon_sha256": "f0f682dceffd5078b8ef119ec7ac7dd5d3f4f98ab15bacaa61d43cdac44bbc6c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.3852",
    "kind": "arxiv",
    "version": 1
  }
}