Pith Number

pith:GFT42AZN

pith:2001:GFT42AZNGN3UXLAATQUENUXXZC

not attested not anchored not stored refs pending

Optical observations of BL Lacertae from 1997 to 1999

B.C. Qian (ShAO, CAS), Gu), J.H.Fan (Cfa, J. Tao (ShAO

arxiv:astro-ph/0103054 v1 · 2001-03-03 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GFT42AZNGN3UXLAATQUENUXXZC}

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	2026-05-18T01:07:45.996618Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3167cd032d33774bac009c2846d2f7c8befe35e7f61d811376811b0a564431b2

Aliases

arxiv: astro-ph/0103054 · arxiv_version: astro-ph/0103054v1 · doi: 10.48550/arxiv.astro-ph/0103054 · pith_short_12: GFT42AZNGN3U · pith_short_16: GFT42AZNGN3UXLAA · pith_short_8: GFT42AZN

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/GFT42AZNGN3UXLAATQUENUXXZC \
  | 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: 3167cd032d33774bac009c2846d2f7c8befe35e7f61d811376811b0a564431b2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3f2ed971be98cc3bfe27b35982618a3e9c2de09d5218e29f8a24cefb91028c0b",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-03-03T03:56:11Z",
    "title_canon_sha256": "afd9d9d6de12d6808baade2f2430944774a32fdd5d8994562177871f000d54a1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0103054",
    "kind": "arxiv",
    "version": 1
  }
}