Pith Number

pith:WBHVYMW3

pith:2021:WBHVYMW3CCY5HMRHFGNJSY2WKJ

not attested not anchored not stored refs pending

Thermal Emission and Radioactive Lines, but No Pulsar, in the Broadband X-Ray Spectrum of Supernova 1987A

Claes Fransson, Dennis Alp, Josefin Larsson

arxiv:2103.02612 v2 · 2021-03-03 · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WBHVYMW3CCY5HMRHFGNJSY2WKJ}

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.

Cited by

1 paper in Pith

Chandra X-Ray Imaging and Spatially Resolved Spectroscopy of SN 1987A: Energy-Dependent Morphology of the Equatorial Ring

Receipt and verification

First computed	2026-07-05T03:04:46.952591Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b04f5c32db10b1d3b227299a996356524c14d33843c310fe83e440f3a533c1bc

Aliases

arxiv: 2103.02612 · arxiv_version: 2103.02612v2 · doi: 10.48550/arxiv.2103.02612 · pith_short_12: WBHVYMW3CCY5 · pith_short_16: WBHVYMW3CCY5HMRH · pith_short_8: WBHVYMW3

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/WBHVYMW3CCY5HMRHFGNJSY2WKJ \
  | 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: b04f5c32db10b1d3b227299a996356524c14d33843c310fe83e440f3a533c1bc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6c66762b111aa1ccb9389d0b6ce661d817afd2da8df2c9af2118a86a1b5a5707",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2021-03-03T19:00:01Z",
    "title_canon_sha256": "53c3dd04e1608d7d314f6ba9abc08ba491a03de3825b432e58ff0780a850a661"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2103.02612",
    "kind": "arxiv",
    "version": 2
  }
}