Pith Number

pith:BDGHUIDH

pith:2021:BDGHUIDHQFNFZEEJX2JR6P6UPW

not attested not anchored not stored refs pending

Light bending and X-ray echoes from behind a supermassive black hole

D. R. Wilkins, E. Costantini, L. C. Gallo, R. D. Blandford, W. N. Brandt

arxiv:2107.13555 v1 · 2021-07-28 · astro-ph.HE · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BDGHUIDHQFNFZEEJX2JR6P6UPW}

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

3 papers in Pith

First detection of ultra-fast outflows in a quiescent galaxy

The emergence of X-ray emission lines during relativistic radio-jet formation in the changing-look active galactic nucleus 1ES 1927+654

Particle Acceleration, Coronal Neutrino Production, and the Diffuse Extragalactic Neutrino Background from Supermassive Black Holes

Receipt and verification

First computed	2026-07-05T03:01:37.837736Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

08cc7a2067815a5c9089be931f3fd47dba982189bb0da0276ab71c338c1dc3fc

Aliases

arxiv: 2107.13555 · arxiv_version: 2107.13555v1 · doi: 10.48550/arxiv.2107.13555 · pith_short_12: BDGHUIDHQFNF · pith_short_16: BDGHUIDHQFNFZEEJ · pith_short_8: BDGHUIDH

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/BDGHUIDHQFNFZEEJX2JR6P6UPW \
  | 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: 08cc7a2067815a5c9089be931f3fd47dba982189bb0da0276ab71c338c1dc3fc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5bb808b842fd19217bf6403303d3253cc78bf79a7b2feed27bedf1265da1dd5e",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2021-07-28T18:00:00Z",
    "title_canon_sha256": "902439185f02559a25e600b1cbe6934c86e378cd595767b3aa5e44c04886a45f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2107.13555",
    "kind": "arxiv",
    "version": 1
  }
}