{
  "annotation_id": "9474de99-b5c6-45ab-ae35-d0fe18abb7c8",
  "date_created": "2026-03-02T18:00:43.433000Z",
  "date_modified": "2026-03-02T18:00:43.433000Z",
  "file_hash": "ade062c5dd4a520810d617c818011b0b9ab51895b8f3aaf287ebd8a40d7f17d9",
  "private": false,
  "record": {
    "abstract": "We report the first results from an X-ray polarimeter with a micropattern gas\nproportional counter using an amorphous silicon active matrix readout. With\n100% polarized X-rays at 4.5 keV, we obtain a modulation factor of 0.33 +/-\n0.03, confirming previous reports of the high polarization sensitivity of a\nfinely segmented pixel proportional counter. The detector described here has a\ngeometry suitable for the focal plane of an astronomical X-ray telescope.\nAmorphous silicon readout technology will enable additional extensions and\nimprovements.",
    "arxiv_id": "physics/0303114",
    "authors": [
      "J. K. Black",
      "P. Deines-Jones",
      "S. E. Ready",
      "R. A. Street"
    ],
    "categories": [
      "physics.ins-det",
      "astro-ph"
    ],
    "doi": "10.1016/j.nima.2003.07.015",
    "journal_ref": "Nucl.Instrum.Meth. A513 (2003) 639-643",
    "title": "X-ray polarimetry with an active-matrix pixel proportional counter",
    "url": "https://arxiv.org/abs/physics/0303114"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "d87dcc6e-3e8c-4d64-905b-770c6b60d383",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}