Pith Number

pith:TZFUJKZG

pith:2020:TZFUJKZGZCRD5H7VHCUZ4GKJGL

not attested not anchored not stored refs pending

An X-ray activity cycle on the young solar-like star $\epsilon \ \rm Eridani$

B. Stelzer, J. Hall, J. Sanz-Forcada, L. Ducci, M. Coffaro, M. Mittag, P.C. Schneider, S. Orlando, T.S. Metcalfe, U. Wolter

arxiv:2002.11009 v1 · 2020-02-25 · 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{TZFUJKZGZCRD5H7VHCUZ4GKJGL}

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	2026-07-05T00:55:10.793167Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9e4b44ab26c8a23e9ff538a99e194932fa50532999f485496abec61b8717a81e

Aliases

arxiv: 2002.11009 · arxiv_version: 2002.11009v1 · doi: 10.48550/arxiv.2002.11009 · pith_short_12: TZFUJKZGZCRD · pith_short_16: TZFUJKZGZCRD5H7V · pith_short_8: TZFUJKZG

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/TZFUJKZGZCRD5H7VHCUZ4GKJGL \
  | 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: 9e4b44ab26c8a23e9ff538a99e194932fa50532999f485496abec61b8717a81e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5150dea77ad9e830f7cd1f654b0e6e2f521af6e58c9986b702e5a06969edff9b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2020-02-25T16:31:51Z",
    "title_canon_sha256": "478530f6bb088f616b71b3239e4a611cc146604223124a9ebc2e4e32049d4153"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2002.11009",
    "kind": "arxiv",
    "version": 1
  }
}