Pith Number

pith:JM3RNTEQ

pith:2009:JM3RNTEQRSW6HXMH36NQQLAU42

not attested not anchored not stored refs pending

Chromospheric Variability in Early F-type Stars

Brian L. Rachford, Dillon R. Foight

arxiv:0904.1620 v1 · 2009-04-09 · 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{JM3RNTEQRSW6HXMH36NQQLAU42}

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	2026-05-18T04:29:43.620427Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4b3716cc908cade3dd87df9b082c14e6a27f0deb97aa0676d77542459faf9266

Aliases

arxiv: 0904.1620 · arxiv_version: 0904.1620v1 · doi: 10.48550/arxiv.0904.1620 · pith_short_12: JM3RNTEQRSW6 · pith_short_16: JM3RNTEQRSW6HXMH · pith_short_8: JM3RNTEQ

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/JM3RNTEQRSW6HXMH36NQQLAU42 \
  | 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: 4b3716cc908cade3dd87df9b082c14e6a27f0deb97aa0676d77542459faf9266

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e542d72b7b0c8c86cbbd35d81d21e02c01f161b67834d19c1b918a2bd5a07aca",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-04-09T23:30:30Z",
    "title_canon_sha256": "3766cac22efffc4e21124f2a2faf85204cca9206a5dbf3e8098c8e8362b38371"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.1620",
    "kind": "arxiv",
    "version": 1
  }
}