Pith Number

pith:UBN4JMZZ

pith:2011:UBN4JMZZROZPPBXEJYNPAPLK3Y

not attested not anchored not stored refs pending

He II 4686 in eta Carinae: collapse of the wind-wind collision region during periastron passage

(10) MPIfR, (11) TAMU, (12) RSAA, (13) LCO, (14) Stockholm University, 15), (15) University of Copenhagen, (16) Carnegie Institution, (17) LNA, (18) Harvard-Smithsonian Center for Astrophysics, 19), (19) SRON, (2) Universidad de La Serena, (3) ON, 4), (4) in memoriam, (5) ICATE-CONICET, (6) CRESST/NASA, (7) Universidad Nacional de La Plata, 8), (8) Instituto de Astrof\'isica de La Plata, (9) SOAR, A. Damineli (1), Argentina, Australia, Brazil, C. A. O. Torres (17), C. B. Pereira (3), Chile, D. C. Nicholls (12), Denmark, E. Fern\'andez-Laj\'us (7, E. R. Parkin (12), F. X. de Ara\'ujo (3, Germany, G. R. Solivella (7, I. Thompson (16), J. E. Steiner (1), J. F. Gonz\'alez (5), J. H. Groh (10), J. I. Arias (2), J. L. Marshall (11), L. Fraga (9), M. A. P. Torres (18, M. Borges Fernandes (3), M. F. Corcoran (6), M. I. Zevallos-Herencia (3) ((1) IAG/USP, M. M. Phillips (13), M. Stritzinger (14, M. Teodoro (1), N. Morrell (13), P. J. McGregor (12), R. C. Gamen (7, R. H. Barb\'a (5), Sweden, the Netherlands), USA

arxiv:1104.2276 v3 · 2011-04-12 · 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{UBN4JMZZROZPPBXEJYNPAPLK3Y}

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	2026-05-18T02:02:32.631271Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a05bc4b3398bb2f786e44e1af03d6ade11d7efe403cd825f94f4734beea5be3a

Aliases

arxiv: 1104.2276 · arxiv_version: 1104.2276v3 · doi: 10.48550/arxiv.1104.2276 · pith_short_12: UBN4JMZZROZP · pith_short_16: UBN4JMZZROZPPBXE · pith_short_8: UBN4JMZZ

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/UBN4JMZZROZPPBXEJYNPAPLK3Y \
  | 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: a05bc4b3398bb2f786e44e1af03d6ade11d7efe403cd825f94f4734beea5be3a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eb4e373573fa0c467714ad1e128925c76bd7f240a1f660c17e2d7d94373b9ab5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2011-04-12T17:17:25Z",
    "title_canon_sha256": "b45cbf510c878380ecc9dbcef1c3c1761f51176d36c7e510adaf74ca7072162d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.2276",
    "kind": "arxiv",
    "version": 3
  }
}