Pith Number

pith:LS5PPII7

pith:2008:LS5PPII7RK4EQIT4SV6U5XBNVP

not attested not anchored not stored refs pending

Effect of Night Laboratories on Learning Objectives for a Non-Major Astronomy Class

Allan T. Weatherwax, Anthony J. Milano, Darren Broder, Douglas C. B. Whittet, Heidi Jo Newberg, Ian C. Jacobi, Lee A. Newberg, Rose A. Finn

arxiv:0809.3817 v1 · 2008-09-22 · physics.ed-ph · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LS5PPII7RK4EQIT4SV6U5XBNVP}

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	2026-05-18T02:15:34.016288Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5cbaf7a11f8ab848227c957d4edc2dabf12563dffcbfd9d63f833ac6b6e5bacf

Aliases

arxiv: 0809.3817 · arxiv_version: 0809.3817v1 · doi: 10.48550/arxiv.0809.3817 · pith_short_12: LS5PPII7RK4E · pith_short_16: LS5PPII7RK4EQIT4 · pith_short_8: LS5PPII7

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/LS5PPII7RK4EQIT4SV6U5XBNVP \
  | 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: 5cbaf7a11f8ab848227c957d4edc2dabf12563dffcbfd9d63f833ac6b6e5bacf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f1dbbc7aae3278f5d2eb6d20f96e6e4d1a23ebe4b7ab3aa3884b7c5fb3c63601",
    "cross_cats_sorted": [
      "astro-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2008-09-22T21:37:34Z",
    "title_canon_sha256": "359441e912a3d64df37b6f173f3e6c87278faee2bd5ab1cbeddcb8737f8199e4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.3817",
    "kind": "arxiv",
    "version": 1
  }
}