Pith Number

pith:5QSD7GDP

pith:2014:5QSD7GDPENZYNTI2EWYR42MTIG

not attested not anchored not stored refs pending

Photometric Classification of quasars from RCS-2 using Random Forest

B. C. Hsieh, D. Carrasco, D. G. Gilbank, D. N. A. Murphy, H. K. C. Yee, K. Pichara, L. F. Barrientos, M. D. Gladders, S. L\'opez, T. Anguita

arxiv:1405.5298 v2 · 2014-05-21 · astro-ph.GA · astro-ph.CO

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

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	2026-05-18T01:26:49.243629Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ec243f986f237386cd1a25b11e699341b747cda229bedc6b594d499e4079fff5

Aliases

arxiv: 1405.5298 · arxiv_version: 1405.5298v2 · doi: 10.48550/arxiv.1405.5298 · pith_short_12: 5QSD7GDPENZY · pith_short_16: 5QSD7GDPENZYNTI2 · pith_short_8: 5QSD7GDP

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/5QSD7GDPENZYNTI2EWYR42MTIG \
  | 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: ec243f986f237386cd1a25b11e699341b747cda229bedc6b594d499e4079fff5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ee79fbb54998bec79ae2560b1a2cd3eaa215cde3eb5cd5cee4ee6de73f568c3d",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2014-05-21T04:46:11Z",
    "title_canon_sha256": "c13201fb39eb90477bc5ece77a9e89965a398edc3757a22956bb79c870362e64"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1405.5298",
    "kind": "arxiv",
    "version": 2
  }
}