Pith Number

pith:PU65UEDH

pith:2018:PU65UEDHP34JGJ2BP45ME3EVDR

not attested not anchored not stored refs pending

The Near-Infrared Transmission Spectra of TRAPPIST-1 Planets b, c, d, e, f, and g and Stellar Contamination in Multi-Epoch Transit Spectra

Benjamin V. Rackham, Daniel Apai, Yifan Zhou, Zhanbo Zhang

arxiv:1802.02086 v3 · 2018-02-06 · astro-ph.EP

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

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	2026-05-18T00:03:08.707737Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7d3dda10677ef89327417f3ac26c951c5669fe1f6936366a20f1c500802d5a57

Aliases

arxiv: 1802.02086 · arxiv_version: 1802.02086v3 · doi: 10.48550/arxiv.1802.02086 · pith_short_12: PU65UEDHP34J · pith_short_16: PU65UEDHP34JGJ2B · pith_short_8: PU65UEDH

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/PU65UEDHP34JGJ2BP45ME3EVDR \
  | 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: 7d3dda10677ef89327417f3ac26c951c5669fe1f6936366a20f1c500802d5a57

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "adaa6d63cf710b0f65a33941ff2b52be4bc4c88084edc9d5f996ca6bdee8537a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2018-02-06T17:35:52Z",
    "title_canon_sha256": "c8cb27618e5c738a1c6d47496ac222a69aa7b6c6ddb9dba8a81f443612f7a9e3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.02086",
    "kind": "arxiv",
    "version": 3
  }
}