Pith Number

pith:VB6MVQ72

pith:2018:VB6MVQ72MGIVFP4FADC7ROZNP2

not attested not anchored not stored refs pending

The rest-frame UV-to-optical spectroscopy of APM 08279+5255 - BAL classification and black hole mass estimates

A. Bongiorno, C. Cicone, C. Feruglio, C. Vignali, E. Piconcelli, F. Fiore, F. G. Saturni, G. Vietri, M. Bischetti, M. Giustini, S. Gallerani, S. Piranomonte

arxiv:1804.10038 v1 · 2018-04-26 · astro-ph.GA · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VB6MVQ72MGIVFP4FADC7ROZNP2}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T00:04:49.188781Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a87ccac3fa619152bf8500c5f8bb2d7eb85d957f79313b7f46ac5b75fa27b7cb

Aliases

arxiv: 1804.10038 · arxiv_version: 1804.10038v1 · doi: 10.48550/arxiv.1804.10038 · pith_short_12: VB6MVQ72MGIV · pith_short_16: VB6MVQ72MGIVFP4F · pith_short_8: VB6MVQ72

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/VB6MVQ72MGIVFP4FADC7ROZNP2 \
  | 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: a87ccac3fa619152bf8500c5f8bb2d7eb85d957f79313b7f46ac5b75fa27b7cb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2a1cba32a78e313e9491f58bad16a8e5b4ee3884d65942364167565c9ec7ffd6",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-04-26T13:12:43Z",
    "title_canon_sha256": "8197bda5f534151c0985d638f6c3242bacf454cec47d267b8e1b8fe1fd720f30"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.10038",
    "kind": "arxiv",
    "version": 1
  }
}