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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"
  1. GRB000301C OT candidate optical observations
  2. GRB000301C - Host galaxy not detected in R (?)
  3. Optical observations of GRB000301c
  4. GRB000301C, Radio observations
  5. GRB000301C, Radio observations
  6. GRB000301C optical observations
  7. GRB000301C, near-infrared observations (JHK' imaging)
  8. GRB 000301c near-IR observations
  9. GRB 000301C, Optical Color
  10. GRB000301C, Optical Spectroscopy
  11. GRB 000301C, UBVRI field photometry
  12. GRB 000301C, Optical Observation
  13. GRB000301C, optical observations
  14. GRB000301C 250 GHz detection
  15. GRB 000301C R-band observation
  16. GRB 000301C, Optical Observation
  17. GRB000301C, near-infrared observations (JHK' photometry)
  18. GRB 000301C: OT confirmed
  19. GRB000301c optical observations
  20. GRB 000301A, Radio Observations
  21. GRB000301C, optical observations
  22. GRB000301c, near-infrared observations
  23. GRB000301C
  24. GRB 000301C : Optical Candidate
  25. Radio observations of the error box of GRB000301A
  26. GRB000301C: RXTE/ASM and IPN localizations
  27. GRB000301A [IPN Position]
  28. GRB000226 [IPN Position]
  29. HST Observations of GRB 990712
  30. GRB 000214 near-IR observations
  31. GRB 000115 Optical observations
  32. GRB 000214, Radio Observations
  33. GRB 000214 ``Valentine's Day Burst'': BeppoSAX NFI Observation
  34. GRB000210, Radio Observations
  35. Correction to GCN 557 (GRB000214: BeppoSAX GRBM and WFC Detection)
  36. GRB 000115, BVRI field photometry
  37. GRB000214: BeppoSAX GRBM and WFC Detection
  38. IPN annulus for GRB000214
  39. BATSE GRB trigger criterion changed
  40. Optical observations of GRB000210
  41. GRB000210 X-ray afterglow
  42. GRB000214: X-ray afterglow candidate
  43. GRB000214 refined BeppoSAX-WFC position
  44. BeppoSAX GRB000214 ("S. Valentine's day GRB")
  45. GRB 000210: BATSE Observations
  46. Correction to Chandra Position of GRB000210 afterglow
  47. Optical observations of the Chandra X-ray source for GRB000210
  48. GRB000210, Radio Observations
  49. Optical candidate for GRB000210
  50. Chandra Observations of GRB000210 X-ray Afterglow
  51. IPN triangulation of GRB000210
  52. GRB000210: possible afterglow detection with BeppoSAX NFI
  53. GRB000201, Radio Observations
  54. GRB000210: BeppoSAX GRBM and WFC Detection
  55. SAX_WFC_GRB_NOTICE
  56. SAX_WFC_GRB_NOTICE
  57. Optical observations of GRB000131
  58. GRB000201 Optical Observations
  59. GRB 000201: TAROT optical observations
  60. GRB 000131 Optical Observations
  61. GRB000126 Optical Observations
  62. BATSE GRB trigger criteria changed
  63. GRB 991208, radio observations
  64. BATSE+IPN location of GRB000131
  65. IPN localization of GRB000131
  66. GRB 000126, optical observations
  67. GRB000126, optical observations
  68. BATSE location of GRB000126
  69. IPN localization of GRB000126
  70. GRB 000115 Optical observations
  71. BATSE Observations of GRB000115
  72. Correction to GCN 520 (IPN annulus for GRB000115)
  73. IPN annulus for GRB000115
  74. Second RXTE Observation of GRB 000115
  75. GRB991216, UBVRIJHK field photometry
  76. GRB991216 late optical observation
  77. Single IPN error box for GRB991229
  78. GCN resumes full operations
  79. GRB 991216 VLBA Observations
  80. BEPPOSAX GRBM Localization of GRB991226
  81. IPN error boxes for GRB991229
  82. GRB 991216: J band spectrophotometry
  83. GRB 991216: Detection of the Host and/or Absorber Galaxy
  84. IPN localization of GRB991226
  85. Single IPN error box for GRB991221
  86. IPN error boxes for GRB991221
  87. GRB 991216 RXTE ASM Observations
  88. IPN error box for GRB991216
  89. GRB 991216: Updated BATSE parameters
  90. Lowell/Perkins observation of GRB 991216
  91. GRB 991217 (SAX J2303.2+0015) Optical observations
  92. GRB991217/SAX J2303.2+0015, optical observations
  93. Chandra observation of the X-ray afterglow of GRB991216
  94. GRB 991216, optical observations
  95. GRB 991216 Optical Observations
  96. GRB 991216 Optical spectroscopy/imaging
  97. VLT spectra of GRB991216
  98. GRB991216 Optical and IR observations
  99. K observations of GRB991216
  100. SAX J2303.2+0015 Optical observations

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
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