Pith Number

pith:RSYGC4TA

pith:2008:RSYGC4TAXLS2SWFELKE6P47PV3

not attested not anchored not stored refs pending

Temperature Differences in the Cepheid Instability Strip Require Differences in the Period-Luminosity Relation in Slope and Zero Point

Allan Sandage (Observatories of the Carnegie Institution of Washington, Astronomy, CA, Pasadena, Switzerland), Univ. of Basel, USA) G. A. Tammann (Dept. of Physics

arxiv:0803.3836 v1 · 2008-03-26 · 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{RSYGC4TAXLS2SWFELKE6P47PV3}

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	2026-07-04T15:44:45.562599Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8cb0617260bae5a958a45a89e7f3efaef1689af957c152c524843b0dc5e5a4a1

Aliases

arxiv: 0803.3836 · arxiv_version: 0803.3836v1 · doi: 10.48550/arxiv.0803.3836 · pith_short_12: RSYGC4TAXLS2 · pith_short_16: RSYGC4TAXLS2SWFE · pith_short_8: RSYGC4TA

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/RSYGC4TAXLS2SWFELKE6P47PV3 \
  | 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: 8cb0617260bae5a958a45a89e7f3efaef1689af957c152c524843b0dc5e5a4a1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c934fd30e4726df7a45a14afd88c6653698283de8d76ef03bd9e72da5f860642",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-03-26T22:38:44Z",
    "title_canon_sha256": "02db9dccc50895c28e36f4e8712dac07300aaf9f85f504f746640366c1873db5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0803.3836",
    "kind": "arxiv",
    "version": 1
  }
}