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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"

36309 results found.

  1. GRB 021004: optical observations
  2. IPN triangulation of GRB021023 (small error boc)
  3. GRB 020813; likely host galaxy.
  4. IPN triangulation of GRB021020 (smaller error box)
  5. IPN triangulation of GRB021020
  6. GRB 021008, radio observations
  7. GRB 021016, optical observations
  8. GRB 021004: VRI observations at TNG: possible break
  9. GRB021016, optical observations
  10. SGR1900+14: burst on October 10 2002
  11. GRB 021008, optical observations
  12. GRB021016(=H2397): A Long GRB Localized by HETE
  13. IPN triangulation of GRB021016 (small error box)
  14. IPN triangulation of GRB021014 (large error box)
  15. IPN triangulation of GRB021013 (single error box)
  16. GRB 021004: optical spectroscopy on Oct 11
  17. IPN triangulation of GRB021013 (two small error boxes)
  18. GRB021004: High-resolution optical spectroscopy
  19. IPN triangulation of GRB021013 (annulus)
  20. GRB021004, UBVRcIc field photometry update
  21. IPN triangulation of GRB021008 (single error box)
  22. GRB 021004 submm observations
  23. IPN triangulation of GRB021008B (annulus)
  24. IPN triangulation of GRB021008 (two small error boxes)
  25. GRB 021004: Optical/NIR Observations
  26. GRB 021004: Additional V-band Polarimetric Observations
  27. GRB021004: optical observation
  28. GRB 021004: Host Galaxy Star Formation Rate
  29. GRB 021004 submm observations
  30. GRB 021004: WC wind?
  31. IPN triangulation of GRB021008
  32. GRB 021004: Optical measurement at OHP
  33. GRB 021004: Optical observations, AUDE network
  34. GRB 021004 - VLA Radio Observations
  35. GRB 021004 - Unusual Radio-to-Submm Spectrum
  36. GRB 021004: optical spectroscopy
  37. IPN triangulation of GRB021007 (annulus)
  38. GRB 021004: HST/STIS spectroscopic observations
  39. GRB021004: optical observations and predicted break time
  40. GRB 021004 redshift
  41. GRB 021004: Optical Decay
  42. GRB 021004 continued IR fading
  43. HETE fluences for GRB021004
  44. GRB 021004, spectroscopic observations
  45. GRB021004: not fading anymore?
  46. GRB 021004: Optical Photometry at 2.5 Days
  47. GRB 021004: polarimetric observations
  48. GRB 021004: V-band Polarimetric Observations
  49. GRB 021004: Optical Decay
  50. GRB021004, astrometric position
  51. GRB021004, Optical Observations
  52. IRAM Millimeter detection of GRB 021004
  53. GRB 021004: Optical observations at RIKEN
  54. GRB 021004 radio observation
  55. GRB 021004: Optical Observations
  56. GRB021004: continued fading
  57. GRB 021004: Optical Photometry at 1.5 Days
  58. GRB021004, Optical Observations
  59. GRB021004, BVRcIc field photometry
  60. GRB 021004: Optical observations
  61. GRB 021004: optical counterpart
  62. GRB 021004, optical observations
  63. GRB021004: Optical Spectroscopy
  64. GRB 021004: Optical Observations
  65. GRB 021004, SPM optical observations
  66. GRB 021004, optical observations
  67. GRB 021004 radio search
  68. GRB 021004: radio observations
  69. GRB 021004: steepening of the optical decay slope
  70. GRB021004: Upper limits from recent and historical observations
  71. XRF020903, BVRI field photometry
  72. GRB021004: optical observations at Nyrola
  73. GRB021004: Absorption redshift
  74. GRB 021004: Kyoto observation
  75. GRB021004(=H2380): A Long GRB Localized by HETE in Near-Real Time
  76. GRB021004: Optical Afterglow
  77. GRB 020903: Optical observations at RIKEN
  78. IPN triangulation of GRB020926 (single large error box)
  79. GRB 020903: correction to GCN 1557
  80. XRF 020903: R band observations
  81. Radio Observations of XRF 020903: The Missing Link
  82. IPN triangulation of GRB020926 (two large error boxes)
  83. GRB020924 (ecliptic latitude-only localization)
  84. IPN triangulation of GRB020923 (two error boxes)
  85. IPN annulus for GRB020923
  86. IPN triangulation of GRB020914B
  87. Improved IPN position for GRB020918 (two large error boxes)
  88. IPN annulus for GRB020914B
  89. IPN triangulation of GRB020918 (annulus)
  90. IPN triangulation of GRB020911 (2 large error boxes)
  91. IPN triangulation of GRB020914 - clarification and additional information
  92. IPN triangulation of GRB020914
  93. GRB 020305: HST/STIS observations
  94. Confirmation of IPN error box for GRB020910
  95. IPN triangulation of GRB020910
  96. IPN GCN Circulars now to be issued without restriction
  97. Single IPN error box for GRB020904
  98. XRF 020903: optical observation at Kyoto
  99. GRB020322 : HST/STIS observations
  100. IPN triangulation of GRB020904

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