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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"

42855 results found.

  1. XRF 020903: R band observations
  2. XRF 020903: Archival Optical Images
  3. Radio Observations of XRF 020903: The Missing Link
  4. XRF 020903: Supernova
  5. IPN triangulation of GRB020926 (two large error boxes)
  6. GRB020924 (ecliptic latitude-only localization)
  7. IPN triangulation of GRB020923 (two error boxes)
  8. IPN annulus for GRB020923
  9. IPN triangulation of GRB020914B
  10. Improved IPN position for GRB020918 (two large error boxes)
  11. IPN annulus for GRB020914B
  12. IPN triangulation of GRB020918 (annulus)
  13. IPN triangulation of GRB020911 (2 large error boxes)
  14. IPN triangulation of GRB020914 - clarification and additional information
  15. IPN triangulation of GRB020914
  16. GRB 020305: HST/STIS observations
  17. Confirmation of IPN error box for GRB020910
  18. IPN triangulation of GRB020910
  19. IPN GCN Circulars now to be issued without restriction
  20. Single IPN error box for GRB020904
  21. XRF 020903: optical observation at Kyoto
  22. GRB020322 : HST/STIS observations
  23. XRF 020903: Optical observations
  24. IPN triangulation of GRB020904
  25. XRF 020903: Optical observations
  26. IPN detection of a burst from SGR1900+14
  27. XRF 020903, optical observations
  28. GRB020903(=H2314): An X-Ray Flash Localized by HETE
  29. INTEGRAL GRBs added to GCN
  30. GRB020813: optical observation
  31. GRB020812: optical observation
  32. GRB020819(=H2275): Revised Localization with HETE Soft X-ray
  33. SGR1900+14 burst localized by HETE
  34. GRB020813: High-resolution optical spectroscopy
  35. GRB020812: negative optical observations
  36. GRB 020812: optical observation at Kyoto University
  37. Second epoch K band imaging of GRB 020819
  38. GRB020813, Baade 6.5m data now available
  39. GRB 020813 : HST observations
  40. Confirming no variability for GRB02081
  41. GRB 020812: early time optical observation at Ouda Station
  42. GRB020813: VRI Decay Slopes
  43. GRB020813: Magellan BVRI Photometry
  44. GRB 020819 : OT candidate - confirmation of non variability
  45. GRB 020819: Optical observations
  46. K band observation of GRB 020819
  47. GRB020819: optical observations
  48. GRB020819(=H2275): A Long Burst Localized by the HETE WXM and SXC
  49. IPN triangulation of GRB020819 (HETE 2275)
  50. HETE 2275: Optical observations
  51. GRB020813: optical and NIR observations
  52. GRB020813: Fading X-ray Afterglow Observed with Chandra
  53. GRB020813, UBVRI field calibration
  54. GRB 020813: addendum to GCN 1498
  55. GRB020813: V-band decay slope
  56. GRB020812: NIR observations
  57. Polarimetry of GRB020813: evidence for variability
  58. GRB020813 IRAM millimeter observations
  59. GRB020812: optical observations
  60. GRB020813: High-Resolution Optical Observations
  61. GRB020813(=H2262): Revised Localization with HETE SXC
  62. GRB 020812: optical observation at Bisei
  63. GRB020813: Early Time Magnitude
  64. GRB020813: optical observations; possible host galaxy
  65. GRB 020813, radio detection
  66. GRB 020812 : optical afterglow candidate
  67. GRB020813, optical observations
  68. Millimeter observation of GRB 020813
  69. GRB020812: optical observations
  70. GRB020813, optical observations
  71. IPN error box for GRB020813
  72. IPN triangulation of GRB020813
  73. GRB020812: possible afterglow candidate
  74. Early Time Limits for GRB020813
  75. GRB020812: possible afterglow candidate
  76. GRB020813, astrometric position
  77. Spectropolarimetry of GRB 020813
  78. GRB 020813 Afterglow Observations; Possible break
  79. GRB 020813: Absorption redshift
  80. GRB 020813 multiband optical observations
  81. GRB020813: optical afterglow
  82. GRB020813: Fading of Candidate OT
  83. GRB020813(=H2262): A Long, Bright Burst Localized by HETE in Near-Real Time
  84. GRB020813: Candidate Optical Afterglow
  85. GRB 020812 optical observation
  86. GRB020812(=H2257): A Long Burst Localized by HETE in Near-Real Time
  87. GRB 020715, optical observations
  88. GRB 020714, optical observations
  89. GRB020801: Imaging of Suggested OT Counterpart at the Magellan
  90. GRB020801: Candidate OT present in DSS
  91. HST Imaging of the Host of GRB 011121
  92. GRB020801, optical afterglow candidate
  93. Further refinement to IPN error box for GRB020531
  94. GRB020331: Late-time Optical Light Curve (re-submission)
  95. GRB020331: Late-time Optical Light Curve
  96. GRB 020405: HST observations reveal red bump
  97. IPN triangulation of GRB020714
  98. IPN triangulation of GRB020715 (=GRB150702)
  99. IPN triangulation of GRB020714
  100. IPN triangulation of GRB150702

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