Pith Number

pith:UP2KE7OM

pith:2018:UP2KE7OMOD237C2S4UZYWH2R5U

not attested not anchored not stored refs pending

Dust scattering halo of 4U 1630-47 observed with Chandra and Swift: New constraints on the source distance

Emrah Kalemci, John A. Tomsick, Thomas J. Maccarone

arxiv:1804.02909 v1 · 2018-04-09 · 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{UP2KE7OMOD237C2S4UZYWH2R5U}

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	2026-05-18T00:14:07.857945Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a3f4a27dcc70f5bf8b52e5338b1f51ed270266d37c57006ead5d6950c5218246

Aliases

arxiv: 1804.02909 · arxiv_version: 1804.02909v1 · doi: 10.48550/arxiv.1804.02909 · pith_short_12: UP2KE7OMOD23 · pith_short_16: UP2KE7OMOD237C2S · pith_short_8: UP2KE7OM

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/UP2KE7OMOD237C2S4UZYWH2R5U \
  | 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: a3f4a27dcc70f5bf8b52e5338b1f51ed270266d37c57006ead5d6950c5218246

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "48866fc838ab0f403b412bcda87729c285393cf002583e4dd8bfa96db72d2aca",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2018-04-09T10:54:27Z",
    "title_canon_sha256": "264e46e41179af37d2ec904bafc79b085d1a4a6fa365af98123fac695dcbeb0f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.02909",
    "kind": "arxiv",
    "version": 1
  }
}