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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"

36196 results found.

  1. IPN triangulation of GRB021014 (large error box)
  2. IPN triangulation of GRB021013 (single error box)
  3. GRB 021004: optical spectroscopy on Oct 11
  4. IPN triangulation of GRB021013 (two small error boxes)
  5. GRB021004: High-resolution optical spectroscopy
  6. IPN triangulation of GRB021013 (annulus)
  7. GRB021004, UBVRcIc field photometry update
  8. IPN triangulation of GRB021008 (single error box)
  9. GRB 021004 submm observations
  10. IPN triangulation of GRB021008B (annulus)
  11. IPN triangulation of GRB021008 (two small error boxes)
  12. GRB 021004: Optical/NIR Observations
  13. GRB 021004: Additional V-band Polarimetric Observations
  14. GRB021004: optical observation
  15. GRB 021004: Host Galaxy Star Formation Rate
  16. GRB 021004 submm observations
  17. GRB 021004: WC wind?
  18. IPN triangulation of GRB021008
  19. GRB 021004: Optical measurement at OHP
  20. GRB 021004: Optical observations, AUDE network
  21. GRB 021004 - VLA Radio Observations
  22. GRB 021004 - Unusual Radio-to-Submm Spectrum
  23. GRB 021004: optical spectroscopy
  24. IPN triangulation of GRB021007 (annulus)
  25. GRB 021004: HST/STIS spectroscopic observations
  26. GRB021004: optical observations and predicted break time
  27. GRB 021004 redshift
  28. GRB 021004: Optical Decay
  29. GRB 021004 continued IR fading
  30. HETE fluences for GRB021004
  31. GRB 021004, spectroscopic observations
  32. GRB021004: not fading anymore?
  33. GRB 021004: Optical Photometry at 2.5 Days
  34. GRB 021004: polarimetric observations
  35. GRB 021004: V-band Polarimetric Observations
  36. GRB 021004: Optical Decay
  37. GRB021004, astrometric position
  38. GRB021004, Optical Observations
  39. IRAM Millimeter detection of GRB 021004
  40. GRB 021004: Optical observations at RIKEN
  41. GRB 021004 radio observation
  42. GRB 021004: Optical Observations
  43. GRB021004: continued fading
  44. GRB 021004: Optical Photometry at 1.5 Days
  45. GRB021004, Optical Observations
  46. GRB021004, BVRcIc field photometry
  47. GRB 021004: Optical observations
  48. GRB 021004: optical counterpart
  49. GRB 021004, optical observations
  50. GRB021004: Optical Spectroscopy
  51. GRB 021004: Optical Observations
  52. GRB 021004, SPM optical observations
  53. GRB 021004, optical observations
  54. GRB 021004 radio search
  55. GRB 021004: radio observations
  56. GRB 021004: steepening of the optical decay slope
  57. GRB021004: Upper limits from recent and historical observations
  58. XRF020903, BVRI field photometry
  59. GRB021004: optical observations at Nyrola
  60. GRB021004: Absorption redshift
  61. GRB 021004: Kyoto observation
  62. GRB021004(=H2380): A Long GRB Localized by HETE in Near-Real Time
  63. GRB021004: Optical Afterglow
  64. GRB 020903: Optical observations at RIKEN
  65. IPN triangulation of GRB020926 (single large error box)
  66. GRB 020903: correction to GCN 1557
  67. XRF 020903: R band observations
  68. Radio Observations of XRF 020903: The Missing Link
  69. IPN triangulation of GRB020926 (two large error boxes)
  70. GRB020924 (ecliptic latitude-only localization)
  71. IPN triangulation of GRB020923 (two error boxes)
  72. IPN annulus for GRB020923
  73. IPN triangulation of GRB020914B
  74. Improved IPN position for GRB020918 (two large error boxes)
  75. IPN annulus for GRB020914B
  76. IPN triangulation of GRB020918 (annulus)
  77. IPN triangulation of GRB020911 (2 large error boxes)
  78. IPN triangulation of GRB020914 - clarification and additional information
  79. IPN triangulation of GRB020914
  80. GRB 020305: HST/STIS observations
  81. Confirmation of IPN error box for GRB020910
  82. IPN triangulation of GRB020910
  83. IPN GCN Circulars now to be issued without restriction
  84. Single IPN error box for GRB020904
  85. XRF 020903: optical observation at Kyoto
  86. GRB020322 : HST/STIS observations
  87. IPN triangulation of GRB020904
  88. IPN detection of a burst from SGR1900+14
  89. INTEGRAL GRBs added to GCN
  90. GRB020813: High-resolution optical spectroscopy
  91. GRB 020812: optical observation at Kyoto University
  92. Second epoch K band imaging of GRB 020819
  93. GRB020813, Baade 6.5m data now available
  94. GRB 020813 : HST observations
  95. Confirming no variability for GRB02081
  96. GRB020819 : Optical observations at KISO
  97. GRB 020812: early time optical observation at Ouda Station
  98. GRB020813: VRI Decay Slopes
  99. GRB 020819 : OT candidate - confirmation of non variability
  100. GRB 020819: Optical observations

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