Pith Number

pith:ATWXMHXK

pith:1997:ATWXMHXKQKLS5BBEJTCDZUEPKQ

not attested not anchored not stored refs pending

On the Origin of the UV Upturn in Elliptical Galaxies. II. Test of the HB Hypothesis

Augustus Oemler, Jr. (Carnegie), NASA), Pierre Demarque (Yale), Sukyoung Yi, (Yale

arxiv:astro-ph/9708185 v1 · 1997-08-20 · 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{ATWXMHXKQKLS5BBEJTCDZUEPKQ}

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	2026-05-18T03:47:42.683377Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

04ed761eea82972e84244cc43cd08f543357197862348019227f56f8d6bffcea

Aliases

arxiv: astro-ph/9708185 · arxiv_version: astro-ph/9708185v1 · doi: 10.48550/arxiv.astro-ph/9708185 · pith_short_12: ATWXMHXKQKLS · pith_short_16: ATWXMHXKQKLS5BBE · pith_short_8: ATWXMHXK

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/ATWXMHXKQKLS5BBEJTCDZUEPKQ \
  | 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: 04ed761eea82972e84244cc43cd08f543357197862348019227f56f8d6bffcea

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d093ceb88f46b4688959d4f7b22ef29e0fd32a25808d35712cebf0602d212811",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-08-20T14:17:40Z",
    "title_canon_sha256": "399552931ebe35db7253854b3fcd4a433e4fca969485fc8e382653f990c14682"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9708185",
    "kind": "arxiv",
    "version": 1
  }
}