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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

45507 results found.

  1. GRB 021004 submm observations
  2. IPN triangulation of GRB021008B (annulus)
  3. IPN triangulation of GRB021008 (two small error boxes)
  4. GRB021004 Chandra HETG Observations
  5. GRB 021004: Optical/NIR Observations
  6. GRB 021004: Additional V-band Polarimetric Observations
  7. GRB021004: optical observation
  8. GRB 021004: Host Galaxy Star Formation Rate
  9. GRB 021004 submm observations
  10. GRB 021004: WC wind?
  11. IPN triangulation of GRB021008
  12. GRB021004: NIR and Optical observations
  13. GRB 021004: Optical measurement at OHP
  14. GRB 021004: Optical observations, AUDE network
  15. GRB 021004 - VLA Radio Observations
  16. GRB 021004 - Unusual Radio-to-Submm Spectrum
  17. GRB 021004: optical spectroscopy
  18. IPN triangulation of GRB021007 (annulus)
  19. XRF 020903 spectrum
  20. GRB 021004: HST/STIS spectroscopic observations
  21. GRB021004: optical observations and predicted break time
  22. GRB021004: BVRc photometry
  23. GRB 021004 redshift
  24. GRB021004 radio observation
  25. GRB021004: restart of optical decay
  26. GRB 021004: Optical Decay
  27. GRB 021004 continued IR fading
  28. HETE fluences for GRB021004
  29. GRB 021004, spectroscopic observations
  30. GRB021004: not fading anymore?
  31. GRB 021004: Optical Photometry at 2.5 Days
  32. GRB 021004: polarimetric observations
  33. GRB 021004: V-band Polarimetric Observations
  34. GRB021004: Update Bisei photometric data
  35. GRB 021004: Optical Decay
  36. GRB021004, astrometric position
  37. GRB021004, Optical Observations
  38. IRAM Millimeter detection of GRB 021004
  39. GRB 021004: Optical observations at RIKEN
  40. GRB 021004 radio observation
  41. GRB 021004: Optical Observations
  42. GRB021004: continued fading
  43. GRB 021004: Optical Photometry at 1.5 Days
  44. GRB021004, Optical Observations
  45. GRB021004, BVRcIc field photometry
  46. GRB 021004: Optical observations
  47. GRB 021004: optical counterpart
  48. GRB 021004, optical observations
  49. GRB021004: Optical Spectroscopy
  50. GRB 021004: Optical Observations
  51. GRB 021004, SPM optical observations
  52. GRB 021004, optical observations
  53. GRB 021004 radio search
  54. GRB 021004: radio observations
  55. GRB 021004: steepening of the optical decay slope
  56. GRB021004: Upper limits from recent and historical observations
  57. XRF020903, BVRI field photometry
  58. GRB021004: optical observations at Nyrola
  59. GRB021004: Absorption redshift
  60. GRB021004(=H2380): Revised Localization with HETE Soft X-ray
  61. GRB021004: optical observations at Bisei
  62. GRB 021004: Kyoto observation
  63. GRB021004(=H2380): A Long GRB Localized by HETE in Near-Real Time
  64. GRB021004: Optical Afterglow
  65. XRF020903: TNG and Asiago photometry
  66. GRB 020903: Optical observations at RIKEN
  67. XRF 020903: Correction to GCN 1560
  68. XRF 020903: VRI observations
  69. IPN triangulation of GRB020926 (single large error box)
  70. GRB 020903: correction to GCN 1557
  71. XRF 020903: R band observations
  72. XRF 020903: Archival Optical Images
  73. Radio Observations of XRF 020903: The Missing Link
  74. XRF 020903: Supernova
  75. IPN triangulation of GRB020926 (two large error boxes)
  76. GRB020924 (ecliptic latitude-only localization)
  77. IPN triangulation of GRB020923 (two error boxes)
  78. IPN annulus for GRB020923
  79. IPN triangulation of GRB020914B
  80. Improved IPN position for GRB020918 (two large error boxes)
  81. IPN annulus for GRB020914B
  82. IPN triangulation of GRB020918 (annulus)
  83. IPN triangulation of GRB020911 (2 large error boxes)
  84. IPN triangulation of GRB020914 - clarification and additional information
  85. IPN triangulation of GRB020914
  86. GRB 020305: HST/STIS observations
  87. Confirmation of IPN error box for GRB020910
  88. IPN triangulation of GRB020910
  89. IPN GCN Circulars now to be issued without restriction
  90. Single IPN error box for GRB020904
  91. XRF 020903: optical observation at Kyoto
  92. GRB020322 : HST/STIS observations
  93. XRF 020903: Optical observations
  94. IPN triangulation of GRB020904
  95. XRF 020903: Optical observations
  96. IPN detection of a burst from SGR1900+14
  97. XRF 020903, optical observations
  98. GRB020903(=H2314): An X-Ray Flash Localized by HETE
  99. INTEGRAL GRBs added to GCN
  100. GRB020813: optical observation

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