Pith Number

pith:YUTKDPMG

pith:2009:YUTKDPMGKUU5ZX3R4U4SRWT45X

not attested not anchored not stored refs pending

Discovery of Precursor LBV Outbursts in Two Recent Optical Transients: The Fitfully Variable Missing Links UGC 2773-OT and SN 2009ip

Adam A. Miller, Alexei V. Filippenko, Andrea M. Ghez, Andrew W. Howard (UC Berkeley), Janet E. Colucci (UCO/Lick Observatory), Jeffrey M. Silverman, Jessica Lu, Joshua S. Bloom (UC Berkeley), Nathan Smith, Peter Nugent (LBNL) Geoffrey W. Marcy, Rebecca A. Bernstein, Sylvana Yelda (UCLA), Weidong Li

arxiv:0909.4792 v2 · 2009-09-27 · astro-ph.SR · astro-ph.HE

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	2026-05-18T02:11:37.447951Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c526a1bd865529dcdf71e53928da7cedef6517e27dba1eacfba23a3cd92cf8c1

Aliases

arxiv: 0909.4792 · arxiv_version: 0909.4792v2 · doi: 10.48550/arxiv.0909.4792 · pith_short_12: YUTKDPMGKUU5 · pith_short_16: YUTKDPMGKUU5ZX3R · pith_short_8: YUTKDPMG

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/YUTKDPMGKUU5ZX3R4U4SRWT45X \
  | 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: c526a1bd865529dcdf71e53928da7cedef6517e27dba1eacfba23a3cd92cf8c1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d2bf35b95d24c2c5be3ec46c43ca9e694e0aec19adf50c2832a69273b9056452",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-09-27T03:39:41Z",
    "title_canon_sha256": "95a8c3cac271651417435603461ec43f58f18a139a622d4c3d9d228b916ced0d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.4792",
    "kind": "arxiv",
    "version": 2
  }
}