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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"

35998 results found.

  1. GRB 021004: VRI observations at TNG: possible break
  2. GRB021016, optical observations
  3. SGR1900+14: burst on October 10 2002
  4. GRB 021008, optical observations
  5. GRB021016(=H2397): A Long GRB Localized by HETE
  6. IPN triangulation of GRB021016 (small error box)
  7. IPN triangulation of GRB021014 (large error box)
  8. IPN triangulation of GRB021013 (single error box)
  9. GRB 021004: optical spectroscopy on Oct 11
  10. IPN triangulation of GRB021013 (two small error boxes)
  11. GRB021004: High-resolution optical spectroscopy
  12. IPN triangulation of GRB021013 (annulus)
  13. GRB021004, UBVRcIc field photometry update
  14. IPN triangulation of GRB021008 (single error box)
  15. GRB 021004 submm observations
  16. IPN triangulation of GRB021008B (annulus)
  17. IPN triangulation of GRB021008 (two small error boxes)
  18. GRB 021004: Optical/NIR Observations
  19. GRB 021004: Additional V-band Polarimetric Observations
  20. GRB021004: optical observation
  21. GRB 021004: Host Galaxy Star Formation Rate
  22. GRB 021004 submm observations
  23. GRB 021004: WC wind?
  24. IPN triangulation of GRB021008
  25. GRB 021004: Optical measurement at OHP
  26. GRB 021004: Optical observations, AUDE network
  27. GRB 021004 - VLA Radio Observations
  28. GRB 021004 - Unusual Radio-to-Submm Spectrum
  29. GRB 021004: optical spectroscopy
  30. IPN triangulation of GRB021007 (annulus)
  31. GRB 021004: HST/STIS spectroscopic observations
  32. GRB021004: optical observations and predicted break time
  33. GRB 021004 redshift
  34. GRB 021004: Optical Decay
  35. GRB 021004 continued IR fading
  36. HETE fluences for GRB021004
  37. GRB 021004, spectroscopic observations
  38. GRB021004: not fading anymore?
  39. GRB 021004: Optical Photometry at 2.5 Days
  40. GRB 021004: polarimetric observations
  41. GRB 021004: V-band Polarimetric Observations
  42. GRB 021004: Optical Decay
  43. GRB021004, astrometric position
  44. GRB021004, Optical Observations
  45. IRAM Millimeter detection of GRB 021004
  46. GRB 021004: Optical observations at RIKEN
  47. GRB 021004 radio observation
  48. GRB 021004: Optical Observations
  49. GRB021004: continued fading
  50. GRB 021004: Optical Photometry at 1.5 Days
  51. GRB021004, Optical Observations
  52. GRB021004, BVRcIc field photometry
  53. GRB 021004: Optical observations
  54. GRB 021004: optical counterpart
  55. GRB 021004, optical observations
  56. GRB021004: Optical Spectroscopy
  57. GRB 021004: Optical Observations
  58. GRB 021004, SPM optical observations
  59. GRB 021004, optical observations
  60. GRB 021004 radio search
  61. GRB 021004: radio observations
  62. GRB 021004: steepening of the optical decay slope
  63. GRB021004: Upper limits from recent and historical observations
  64. XRF020903, BVRI field photometry
  65. GRB021004: optical observations at Nyrola
  66. GRB021004: Absorption redshift
  67. GRB 021004: Kyoto observation
  68. GRB021004(=H2380): A Long GRB Localized by HETE in Near-Real Time
  69. GRB021004: Optical Afterglow
  70. GRB 020903: Optical observations at RIKEN
  71. IPN triangulation of GRB020926 (single large error box)
  72. GRB 020903: correction to GCN 1557
  73. XRF 020903: R band observations
  74. Radio Observations of XRF 020903: The Missing Link
  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. IPN triangulation of GRB020904
  94. IPN detection of a burst from SGR1900+14
  95. INTEGRAL GRBs added to GCN
  96. GRB020813: High-resolution optical spectroscopy
  97. GRB 020812: optical observation at Kyoto University
  98. Second epoch K band imaging of GRB 020819
  99. GRB020813, Baade 6.5m data now available
  100. GRB 020813 : HST observations

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