Pith Number

pith:HHAZJZ5P

pith:2018:HHAZJZ5PHZ3PX46GMXFQLIDIA5

not attested not anchored not stored refs pending

The sdA problem - II. Photometric and Spectroscopic Follow-up

A. D. Romero, B. G. Castanheira, D. Koester, Ingrid Pelisoli, L. Fraga, S. O. Kepler

arxiv:1804.09059 v1 · 2018-04-24 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HHAZJZ5PHZ3PX46GMXFQLIDIA5}

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	2026-05-18T00:13:26.039394Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

39c194e7af3e76fbf3c665cb05a06807630bbbfc746a4c810ac746f3857d4016

Aliases

arxiv: 1804.09059 · arxiv_version: 1804.09059v1 · doi: 10.48550/arxiv.1804.09059 · pith_short_12: HHAZJZ5PHZ3P · pith_short_16: HHAZJZ5PHZ3PX46G · pith_short_8: HHAZJZ5P

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/HHAZJZ5PHZ3PX46GMXFQLIDIA5 \
  | 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: 39c194e7af3e76fbf3c665cb05a06807630bbbfc746a4c810ac746f3857d4016

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5c58c17a675464cf7d17660fa00d322036ac39404ef8911caedc5d06d4399995",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-04-24T14:13:09Z",
    "title_canon_sha256": "3e76c206f3bf2a0e8a694c3c785e22bc6309bc831e1a56418ada962108a039dc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.09059",
    "kind": "arxiv",
    "version": 1
  }
}