Pith Number

pith:AZOPDSHG

pith:2009:AZOPDSHGDET42N3G3UWINEEKL2

not attested not anchored not stored refs pending

Studying X-ray reprocessing and continuum variability in quasars: PG 1211+143

A. Valcheva, D. Grupe, E. Ovcharov, E. Semkov, L.C. Gallo, R. Bachev, S. Boeva, Ts. Georgiev

arxiv:0906.4882 v1 · 2009-06-26 · astro-ph.CO · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{AZOPDSHGDET42N3G3UWINEEKL2}

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	2026-05-18T02:13:12.528433Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

065cf1c8e61927cd3766dd2c86908a5e9c840136c317c064229a99bd20551b9b

Aliases

arxiv: 0906.4882 · arxiv_version: 0906.4882v1 · doi: 10.48550/arxiv.0906.4882 · pith_short_12: AZOPDSHGDET4 · pith_short_16: AZOPDSHGDET42N3G · pith_short_8: AZOPDSHG

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/AZOPDSHGDET42N3G3UWINEEKL2 \
  | 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: 065cf1c8e61927cd3766dd2c86908a5e9c840136c317c064229a99bd20551b9b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8a5b9381d3f65756c89b28be3d34ebb895d890c4230447719258a55e12321c20",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-06-26T09:12:21Z",
    "title_canon_sha256": "01d5e370ba834f0ffcd292c5434418d00b9e380d0538d4325d145ee5dbfd511b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.4882",
    "kind": "arxiv",
    "version": 1
  }
}