Pith Number

pith:6P5RQZQ7

pith:2021:6P5RQZQ7NR7GXPL2X26MLXNUM3

not attested not anchored not stored refs pending

The X-ray spectral and variability properties of typical radio-loud quasars

John Timlin, Shifu Zhu, W. N. Brandt

arxiv:2105.06478 v2 · 2021-05-13 · astro-ph.HE · 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{6P5RQZQ7NR7GXPL2X26MLXNUM3}

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	2026-07-05T02:40:35.818605Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f3fb18661f6c7e6bbd7abebcc5ddb466d0ffdafcd9bafd1b44747c1d220c451f

Aliases

arxiv: 2105.06478 · arxiv_version: 2105.06478v2 · doi: 10.48550/arxiv.2105.06478 · pith_short_12: 6P5RQZQ7NR7G · pith_short_16: 6P5RQZQ7NR7GXPL2 · pith_short_8: 6P5RQZQ7

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/6P5RQZQ7NR7GXPL2X26MLXNUM3 \
  | 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: f3fb18661f6c7e6bbd7abebcc5ddb466d0ffdafcd9bafd1b44747c1d220c451f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bbf8f74279c31d7edd7bd8018e465b369f6ccb958c936fde3ece6f5fffd401ad",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2021-05-13T18:00:02Z",
    "title_canon_sha256": "ccda2c03956e4de25aa14642a76fcceef9c6ae9592399759a78b31166372ee19"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2105.06478",
    "kind": "arxiv",
    "version": 2
  }
}