Pith Number

pith:4EAXYPFG

pith:2012:4EAXYPFGFQD5D6B55QW74VI4OG

not attested not anchored not stored refs pending

TW Hya: Spectral Variability, X-Rays, and Accretion Diagnostics

2), 3), (3) Astronomy Dept., (4) Australian National Observatory, (5) Institute of Astronomy, (6) South African Astronomi cal Observatory, (7) University of New South Wales, (8) Indian Institute of Ast rophsics, (8) S. C. Schuler ((1) Harvard-Smithsonian Center for Astrophysics, (9) National Optical Astronomy Observatory, A. Bonanos (5), ACT, A. K. Dupree (1), Arg entina, Astrophysics, Athens, Australia, AZ, AZ), Bangalore, Buenos Aires, Cambridge, Canberra, E. E. Schneider (1, G. J. M. Luna (1, Greece, India, L. A. Crause (6), MA (2) Instituto de Astronomia y Fisica del Espacio, Mount Stromlo Observatory, M. S. Bessell (4), National Observatory of Athens, N. S. Brickhouse (1), Observatory, South Africa, S. R. Cranmer (1), S. V. Mallik, Tucson, University of Arizona, W. A. Lawson (7)

arxiv:1202.6373 v1 · 2012-02-28 · 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{4EAXYPFGFQD5D6B55QW74VI4OG}

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	2026-05-18T01:58:18.520669Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e1017c3ca62c07d1f83dec2dfe551c719314450923d340609f3e5f6cdfe29b13

Aliases

arxiv: 1202.6373 · arxiv_version: 1202.6373v1 · doi: 10.48550/arxiv.1202.6373 · pith_short_12: 4EAXYPFGFQD5 · pith_short_16: 4EAXYPFGFQD5D6B5 · pith_short_8: 4EAXYPFG

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/4EAXYPFGFQD5D6B55QW74VI4OG \
  | 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: e1017c3ca62c07d1f83dec2dfe551c719314450923d340609f3e5f6cdfe29b13

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6c65665a823f2f29670fda233911e83800484692bc6e189e97d4a4b2659bc053",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2012-02-28T21:05:16Z",
    "title_canon_sha256": "2fefcff56cda561d0e8e61217c6dfddfadff6fa5666077741904fda0810979bb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.6373",
    "kind": "arxiv",
    "version": 1
  }
}