Pith Number

pith:HKLY7NV2

pith:2015:HKLY7NV2PZ4FGCXVJ2RN6ZB2CH

not attested not anchored not stored refs pending

Tracing the Metal-Poor M31 Stellar Halo with Blue Horizontal Branch Stars

Anil C. Seth, Benjamin F. Williams, Claire Dorman, Eric F. BellKaroline M. Gilbert, Jason S. Kalirai, Julianne J. Dalcanton, Leo Girardi, Philip Rosenfield, Puragra Guhathakurta, Tod R. Lauer

arxiv:1501.06631 v1 · 2015-01-27 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HKLY7NV2PZ4FGCXVJ2RN6ZB2CH}

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	2026-05-18T01:41:06.471482Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3a978fb6ba7e78530af54ea2df643a11f1bf69585f6c39d70e0c0a1340d361f6

Aliases

arxiv: 1501.06631 · arxiv_version: 1501.06631v1 · doi: 10.48550/arxiv.1501.06631 · pith_short_12: HKLY7NV2PZ4F · pith_short_16: HKLY7NV2PZ4FGCXV · pith_short_8: HKLY7NV2

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/HKLY7NV2PZ4FGCXVJ2RN6ZB2CH \
  | 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: 3a978fb6ba7e78530af54ea2df643a11f1bf69585f6c39d70e0c0a1340d361f6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ad68a4e3782fb99e1f7d220e69f05ba707a62c7f235e8e0cf6b8ce9e7984c35d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-01-27T01:08:18Z",
    "title_canon_sha256": "f1e72a916b1acd0a6448aee09fe2fce210928ebb38163d68ddc5f481a17b4b41"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.06631",
    "kind": "arxiv",
    "version": 1
  }
}