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

Advanced

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