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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"

36014 results found.

  1. IPN triangulation of GRB021025 (portion of annulus)
  2. IPN triangulation of GRB021027 (single large error box)
  3. GRB021004, late-time optical observations
  4. IPN triangulation of GRB021027 (two large error boxes)
  5. GRB 021023: Infrared Imaging
  6. IPN triangulation of GRB021027 (annulus)
  7. GRB 021023: Curious K-band Source(s) Just Outside of IPN Localization
  8. IPN triangulation of GRB021025 (annulus)
  9. IPN triangulation of SGR1900+14, October 22 2002
  10. GRB 021004: optical observations
  11. IPN triangulation of GRB021023 (small error boc)
  12. GRB 020813; likely host galaxy.
  13. IPN triangulation of GRB021020 (smaller error box)
  14. IPN triangulation of GRB021020
  15. GRB 021008, radio observations
  16. GRB 021016, optical observations
  17. GRB 021004: VRI observations at TNG: possible break
  18. GRB021016, optical observations
  19. SGR1900+14: burst on October 10 2002
  20. GRB 021008, optical observations
  21. GRB021016(=H2397): A Long GRB Localized by HETE
  22. IPN triangulation of GRB021016 (small error box)
  23. IPN triangulation of GRB021014 (large error box)
  24. IPN triangulation of GRB021013 (single error box)
  25. GRB 021004: optical spectroscopy on Oct 11
  26. IPN triangulation of GRB021013 (two small error boxes)
  27. GRB021004: High-resolution optical spectroscopy
  28. IPN triangulation of GRB021013 (annulus)
  29. GRB021004, UBVRcIc field photometry update
  30. IPN triangulation of GRB021008 (single error box)
  31. GRB 021004 submm observations
  32. IPN triangulation of GRB021008B (annulus)
  33. IPN triangulation of GRB021008 (two small error boxes)
  34. GRB 021004: Optical/NIR Observations
  35. GRB 021004: Additional V-band Polarimetric Observations
  36. GRB021004: optical observation
  37. GRB 021004: Host Galaxy Star Formation Rate
  38. GRB 021004 submm observations
  39. GRB 021004: WC wind?
  40. IPN triangulation of GRB021008
  41. GRB 021004: Optical measurement at OHP
  42. GRB 021004: Optical observations, AUDE network
  43. GRB 021004 - VLA Radio Observations
  44. GRB 021004 - Unusual Radio-to-Submm Spectrum
  45. GRB 021004: optical spectroscopy
  46. IPN triangulation of GRB021007 (annulus)
  47. GRB 021004: HST/STIS spectroscopic observations
  48. GRB021004: optical observations and predicted break time
  49. GRB 021004 redshift
  50. GRB 021004: Optical Decay
  51. GRB 021004 continued IR fading
  52. HETE fluences for GRB021004
  53. GRB 021004, spectroscopic observations
  54. GRB021004: not fading anymore?
  55. GRB 021004: Optical Photometry at 2.5 Days
  56. GRB 021004: polarimetric observations
  57. GRB 021004: V-band Polarimetric Observations
  58. GRB 021004: Optical Decay
  59. GRB021004, astrometric position
  60. GRB021004, Optical Observations
  61. IRAM Millimeter detection of GRB 021004
  62. GRB 021004: Optical observations at RIKEN
  63. GRB 021004 radio observation
  64. GRB 021004: Optical Observations
  65. GRB021004: continued fading
  66. GRB 021004: Optical Photometry at 1.5 Days
  67. GRB021004, Optical Observations
  68. GRB021004, BVRcIc field photometry
  69. GRB 021004: Optical observations
  70. GRB 021004: optical counterpart
  71. GRB 021004, optical observations
  72. GRB021004: Optical Spectroscopy
  73. GRB 021004: Optical Observations
  74. GRB 021004, SPM optical observations
  75. GRB 021004, optical observations
  76. GRB 021004 radio search
  77. GRB 021004: radio observations
  78. GRB 021004: steepening of the optical decay slope
  79. GRB021004: Upper limits from recent and historical observations
  80. XRF020903, BVRI field photometry
  81. GRB021004: optical observations at Nyrola
  82. GRB021004: Absorption redshift
  83. GRB 021004: Kyoto observation
  84. GRB021004(=H2380): A Long GRB Localized by HETE in Near-Real Time
  85. GRB021004: Optical Afterglow
  86. GRB 020903: Optical observations at RIKEN
  87. IPN triangulation of GRB020926 (single large error box)
  88. GRB 020903: correction to GCN 1557
  89. XRF 020903: R band observations
  90. Radio Observations of XRF 020903: The Missing Link
  91. IPN triangulation of GRB020926 (two large error boxes)
  92. GRB020924 (ecliptic latitude-only localization)
  93. IPN triangulation of GRB020923 (two error boxes)
  94. IPN annulus for GRB020923
  95. IPN triangulation of GRB020914B
  96. Improved IPN position for GRB020918 (two large error boxes)
  97. IPN annulus for GRB020914B
  98. IPN triangulation of GRB020918 (annulus)
  99. IPN triangulation of GRB020911 (2 large error boxes)
  100. IPN triangulation of GRB020914 - clarification and additional information

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