Pith Number

pith:N7BHRV53

pith:2015:N7BHRV53RSNYRALDVW66K2MX4F

not attested not anchored not stored refs pending

Stellar activity mimics a habitable-zone planet around Kapteyn's star

2, 2), (2) Center for Exoplanets & Habitable Worlds, 3), 3) ((1) Dept. of Astronomy, (3) The Penn State Astrobiology Research Center), Arpita Roy (1, Astrophysics, Paul Robertson (1, Penn State University, Suvrath Mahadevan (1

arxiv:1505.02778 v2 · 2015-05-11 · astro-ph.EP · 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{N7BHRV53RSNYRALDVW66K2MX4F}

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	2026-05-18T01:59:57.338331Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6fc278d7bb8c9b888163adbde56997e148f7ba201627769d1d9b40729e07e819

Aliases

arxiv: 1505.02778 · arxiv_version: 1505.02778v2 · doi: 10.48550/arxiv.1505.02778 · pith_short_12: N7BHRV53RSNY · pith_short_16: N7BHRV53RSNYRALD · pith_short_8: N7BHRV53

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/N7BHRV53RSNYRALDVW66K2MX4F \
  | 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: 6fc278d7bb8c9b888163adbde56997e148f7ba201627769d1d9b40729e07e819

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ea63dcfb7a811c56429eecc2e1c16509b1831fac307e70d0fd29c361c95cd04b",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2015-05-11T20:00:44Z",
    "title_canon_sha256": "c9ee98a34bd09f76879499737cc9ee6edb74d3369144798f6f14d02c9517424d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1505.02778",
    "kind": "arxiv",
    "version": 2
  }
}