Pith Number

pith:K5EXSXRL

pith:2001:K5EXSXRLXGDN6WEZQWONSC2DT2

not attested not anchored not stored refs pending

The Distance to SN 1999em in NGC 1637 from the Expanding Photosphere Method

Aaron J. Barth, Alan W. Harris, Alexei V. Filippenko, Alison L. Coil, Andreas Quirrenbach, Carol A. Grady, Douglas C. Leonard, Elinor L. Gates, Matthew A. Malkan, Richard R. Treffers, Ronald G. Eastman, Ryan Chornock, Sabine Frink, Schelte J. Bus, Thomas Matheson, Weidong Li

arxiv:astro-ph/0109535 v1 · 2001-09-27 · 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{K5EXSXRLXGDN6WEZQWONSC2DT2}

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	2026-05-18T04:12:02.855969Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5749795e2bb986df5899859cd90b439eb354decc9924a140624c4ec8160795fd

Aliases

arxiv: astro-ph/0109535 · arxiv_version: astro-ph/0109535v1 · doi: 10.48550/arxiv.astro-ph/0109535 · pith_short_12: K5EXSXRLXGDN · pith_short_16: K5EXSXRLXGDN6WEZ · pith_short_8: K5EXSXRL

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/K5EXSXRLXGDN6WEZQWONSC2DT2 \
  | 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: 5749795e2bb986df5899859cd90b439eb354decc9924a140624c4ec8160795fd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2412484ae3801bc61216c133a87043e73b892efd8adc7613a2ffe3f29a6fe930",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-09-27T23:21:37Z",
    "title_canon_sha256": "b112f3f6ba8ae299bb5744bd93df550c2ac8c32711bd3ebb6b55ffa24d3b016d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0109535",
    "kind": "arxiv",
    "version": 1
  }
}