Pith Number

pith:VX5UQ2PY

pith:2021:VX5UQ2PYB6QKTA2QB4ATQIDY5D

not attested not anchored not stored refs pending

Near-infrared spectroscopy of extreme BAL QSOs from the QUBRICS bright quasar survey

Andrea Grazian, Emanuele Giallongo, Fabio Fontanot, Francesco Guarneri, Giorgio Calderone, Guido Cupani, Konstantina Boutsia, Nicola Menci, Pierluigi Selvelli, Stefano Cristiani, Valentina D'Odorico

arxiv:2112.02594 v1 · 2021-12-05 · astro-ph.CO · astro-ph.GA · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VX5UQ2PYB6QKTA2QB4ATQIDY5D}

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	2026-07-05T03:45:55.821222Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

adfb4869f80fa0a983500f01382078e8fc32deef2be94b47153fbe58cbc82b3c

Aliases

arxiv: 2112.02594 · arxiv_version: 2112.02594v1 · doi: 10.48550/arxiv.2112.02594 · pith_short_12: VX5UQ2PYB6QK · pith_short_16: VX5UQ2PYB6QKTA2Q · pith_short_8: VX5UQ2PY

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/VX5UQ2PYB6QKTA2QB4ATQIDY5D \
  | 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: adfb4869f80fa0a983500f01382078e8fc32deef2be94b47153fbe58cbc82b3c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ae3b3e938eb597df5fde4b90aa9e3f6c278a390c48c9e668c02245868ef1a911",
    "cross_cats_sorted": [
      "astro-ph.GA",
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2021-12-05T15:24:53Z",
    "title_canon_sha256": "5e2dad52802cc736ed4383b12886f9b2317cb74bcdd294111af9b7b974a20ab6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2112.02594",
    "kind": "arxiv",
    "version": 1
  }
}