Pith Number

pith:FX55ZISR

pith:2019:FX55ZISRS75RGAJ3OUKZPNVPUO

not attested not anchored not stored refs pending

Variability of Low-ionization Broad Absorption Line Quasars Based on Multi-epoch Spectra from The Sloan Digital Sky Survey

C. J. Grier, D. P. Schneider, M. Vivek, N. Filiz Ak, P. B. Hall, S. M. McGraw, Weimin. Yi, W. N. Brandt

arxiv:1905.01573 v1 · 2019-05-05 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FX55ZISRS75RGAJ3OUKZPNVPUO}

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	2026-05-17T23:42:19.431461Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2dfbdca25197fb13013b751597b6afa3897fefb0ddd5610e2dcf93fbdc9df43f

Aliases

arxiv: 1905.01573 · arxiv_version: 1905.01573v1 · doi: 10.48550/arxiv.1905.01573 · pith_short_12: FX55ZISRS75R · pith_short_16: FX55ZISRS75RGAJ3 · pith_short_8: FX55ZISR

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/FX55ZISRS75RGAJ3OUKZPNVPUO \
  | 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: 2dfbdca25197fb13013b751597b6afa3897fefb0ddd5610e2dcf93fbdc9df43f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f8828e84e3d7a2ecf59e2020539e2232e8ef3fa41152c9210151f64006d2aeff",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-05-05T00:53:09Z",
    "title_canon_sha256": "f8dbdda2f30aafab97012721bfa5621da46c2c0de43c366d7ee582a37d124eca"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.01573",
    "kind": "arxiv",
    "version": 1
  }
}