Pith Number

pith:PG6GDVKR

pith:2001:PG6GDVKRRUJRQZR4FO3YFOIIF4

not attested not anchored not stored refs pending

On the estimation of galaxy structural parameters: the Sersic Model

Alister W. Graham, Ignacio Trujillo, Nicola Caon (Intituto de Astrofisica de Canarias)

arxiv:astro-ph/0102393 v1 · 2001-02-22 · 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{PG6GDVKRRUJRQZR4FO3YFOIIF4}

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	2026-07-04T16:22:46.171716Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

79bc61d5518d1318663c2bb782b9082f1984732c4416b317ec37ed1913199e2c

Aliases

arxiv: astro-ph/0102393 · arxiv_version: astro-ph/0102393v1 · doi: 10.48550/arxiv.astro-ph/0102393 · pith_short_12: PG6GDVKRRUJR · pith_short_16: PG6GDVKRRUJRQZR4 · pith_short_8: PG6GDVKR

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/PG6GDVKRRUJRQZR4FO3YFOIIF4 \
  | 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: 79bc61d5518d1318663c2bb782b9082f1984732c4416b317ec37ed1913199e2c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "690a46da6ce836accbc2901c3eb658e05d2652588941d911c867f8b137dc2ac7",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-02-22T18:00:26Z",
    "title_canon_sha256": "dfec45de533f0f282ab2262be2be483818effd776e63846621f3fd1ec13f1e78"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0102393",
    "kind": "arxiv",
    "version": 1
  }
}