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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"

39254 results found.

  1. IPN triangulation of GRB021108 (large error box)
  2. GRB021112 (=H2448): A Long GRB Localized by HETE
  3. GRB 021016: Optical Observations
  4. IPN triangulation of GRB021109 (annulus)
  5. IPN triangulation of GRB021108 (annulus)
  6. IPN triangulation of GRB021104 (annulus)
  7. GRB021104(=H2434): A Long, X-Ray-Rich GRB Localized by HETE
  8. IPN triangulation of bursts from SGR1900+14, November 1-2, 2002
  9. SGR1900+14 activity, November 2-4, 2002
  10. GRB021104: Candidate present in DSS
  11. IPN triangulation of GRB021102 (annulus)
  12. IPN triangulation of a burst from SGR1900+14 on November 01, 2002
  13. IPN triangulation of a burst from SGR1900+14 on October 29 2002
  14. IPN triangulation of GRB021025 (portion of annulus)
  15. IPN triangulation of GRB021027 (single large error box)
  16. GRB021004, late-time optical observations
  17. IPN triangulation of GRB021027 (two large error boxes)
  18. GRB 021023: Infrared Imaging
  19. IPN triangulation of GRB021027 (annulus)
  20. GRB 021023: Curious K-band Source(s) Just Outside of IPN Localization
  21. IPN triangulation of GRB021025 (annulus)
  22. IPN triangulation of SGR1900+14, October 22 2002
  23. GRB 021004: optical observations
  24. IPN triangulation of GRB021023 (small error boc)
  25. GRB 020813; likely host galaxy.
  26. IPN triangulation of GRB021020 (smaller error box)
  27. IPN triangulation of GRB021020
  28. GRB 021008, radio observations
  29. GRB 021016, optical observations
  30. GRB 021004: VRI observations at TNG: possible break
  31. GRB021016, optical observations
  32. SGR1900+14: burst on October 10 2002
  33. GRB 021008, optical observations
  34. GRB021016(=H2397): A Long GRB Localized by HETE
  35. IPN triangulation of GRB021016 (small error box)
  36. IPN triangulation of GRB021014 (large error box)
  37. IPN triangulation of GRB021013 (single error box)
  38. GRB 021004: optical spectroscopy on Oct 11
  39. IPN triangulation of GRB021013 (two small error boxes)
  40. GRB021004: High-resolution optical spectroscopy
  41. IPN triangulation of GRB021013 (annulus)
  42. GRB021004, UBVRcIc field photometry update
  43. IPN triangulation of GRB021008 (single error box)
  44. GRB 021004 submm observations
  45. IPN triangulation of GRB021008B (annulus)
  46. IPN triangulation of GRB021008 (two small error boxes)
  47. GRB 021004: Optical/NIR Observations
  48. GRB 021004: Additional V-band Polarimetric Observations
  49. GRB021004: optical observation
  50. GRB 021004: Host Galaxy Star Formation Rate
  51. GRB 021004 submm observations
  52. GRB 021004: WC wind?
  53. IPN triangulation of GRB021008
  54. GRB 021004: Optical measurement at OHP
  55. GRB 021004: Optical observations, AUDE network
  56. GRB 021004 - VLA Radio Observations
  57. GRB 021004 - Unusual Radio-to-Submm Spectrum
  58. GRB 021004: optical spectroscopy
  59. IPN triangulation of GRB021007 (annulus)
  60. GRB 021004: HST/STIS spectroscopic observations
  61. GRB021004: optical observations and predicted break time
  62. GRB 021004 redshift
  63. GRB 021004: Optical Decay
  64. GRB 021004 continued IR fading
  65. HETE fluences for GRB021004
  66. GRB 021004, spectroscopic observations
  67. GRB021004: not fading anymore?
  68. GRB 021004: Optical Photometry at 2.5 Days
  69. GRB 021004: polarimetric observations
  70. GRB 021004: V-band Polarimetric Observations
  71. GRB 021004: Optical Decay
  72. GRB021004, astrometric position
  73. GRB021004, Optical Observations
  74. IRAM Millimeter detection of GRB 021004
  75. GRB 021004: Optical observations at RIKEN
  76. GRB 021004 radio observation
  77. GRB 021004: Optical Observations
  78. GRB021004: continued fading
  79. GRB 021004: Optical Photometry at 1.5 Days
  80. GRB021004, Optical Observations
  81. GRB021004, BVRcIc field photometry
  82. GRB 021004: Optical observations
  83. GRB 021004: optical counterpart
  84. GRB 021004, optical observations
  85. GRB021004: Optical Spectroscopy
  86. GRB 021004: Optical Observations
  87. GRB 021004, SPM optical observations
  88. GRB 021004, optical observations
  89. GRB 021004 radio search
  90. GRB 021004: radio observations
  91. GRB 021004: steepening of the optical decay slope
  92. GRB021004: Upper limits from recent and historical observations
  93. XRF020903, BVRI field photometry
  94. GRB021004: optical observations at Nyrola
  95. GRB021004: Absorption redshift
  96. GRB 021004: Kyoto observation
  97. GRB021004(=H2380): A Long GRB Localized by HETE in Near-Real Time
  98. GRB021004: Optical Afterglow
  99. GRB 020903: Optical observations at RIKEN
  100. IPN triangulation of GRB020926 (single large error box)

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