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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"

37680 results found.

  1. GRB000301C, optical R-band observations
  2. GRB000301c - R photometry and nearby faint source confirmation
  3. GRB 000301C, Optical Observation
  4. GRB 000301c: K' observations
  5. GRB 000301C Optical Observations
  6. GRB 000301C: K' Observations
  7. GRB000301C - Host galaxy not detected in R (?)
  8. GRB000301C optical observations
  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 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. GRB000301C: RXTE/ASM and IPN localizations
  26. GRB000226 [IPN Position]
  27. HST Observations of GRB 990712
  28. GRB 000214 near-IR observations
  29. GRB 000115 Optical observations
  30. GRB 000214, Radio Observations
  31. GRB 000214 ``Valentine's Day Burst'': BeppoSAX NFI Observation
  32. GRB 000115, BVRI field photometry
  33. IPN annulus for GRB000214
  34. BATSE GRB trigger criterion changed
  35. GRB000210 X-ray afterglow
  36. GRB000214: X-ray afterglow candidate
  37. BeppoSAX GRB000214 ("S. Valentine's day GRB")
  38. GRB 000210: BATSE Observations
  39. Optical observations of the Chandra X-ray source for GRB000210
  40. Chandra Observations of GRB000210 X-ray Afterglow
  41. IPN triangulation of GRB000210
  42. GRB 000201: TAROT optical observations
  43. GRB 000131 Optical Observations
  44. GRB000126 Optical Observations
  45. BATSE GRB trigger criteria changed
  46. GRB 991208, radio observations
  47. BATSE+IPN location of GRB000131
  48. IPN localization of GRB000131
  49. GRB 000126, optical observations
  50. GRB000126, optical observations
  51. BATSE location of GRB000126
  52. IPN localization of GRB000126
  53. GRB 000115 Optical observations
  54. BATSE Observations of GRB000115
  55. Second RXTE Observation of GRB 000115
  56. GRB991216, UBVRIJHK field photometry
  57. Single IPN error box for GRB991229
  58. GRB 991216 VLBA Observations
  59. BEPPOSAX GRBM Localization of GRB991226
  60. IPN error boxes for GRB991229
  61. GRB 991216: J band spectrophotometry
  62. GRB 991216: Detection of the Host and/or Absorber Galaxy
  63. IPN localization of GRB991226
  64. Single IPN error box for GRB991221
  65. IPN error boxes for GRB991221
  66. GRB 991216 RXTE ASM Observations
  67. IPN error box for GRB991216
  68. GRB 991216: Updated BATSE parameters
  69. Lowell/Perkins observation of GRB 991216
  70. GRB 991217 (SAX J2303.2+0015) Optical observations
  71. Chandra observation of the X-ray afterglow of GRB991216
  72. GRB 991216, optical observations
  73. GRB 991216 Optical Observations
  74. GRB 991216 Optical spectroscopy/imaging
  75. K observations of GRB991216
  76. GRB 991217 (SAX J2303.2+0015) Optical observations
  77. GRB991216 Spectroscopy
  78. Lowell/Perkins observation of GRB 991216
  79. GRB991216, optical observations
  80. Refined IPN localization of GRB991216
  81. GRB 991216 Radio Observations
  82. GRB 991217
  83. GRB 991208 Keck Spectroscopy
  84. GRB 991208 Infrared Detection
  85. GRB 991216--Summary of RXTE Observations
  86. GRB 991216 Optical Observations
  87. GRB 991216, optical observations
  88. GRB 991208 SAO-RAS Spectroscopy
  89. SAX J2303.2+0015: an x-ray/GRB?
  90. GRB 991216, Optical Transient
  91. GRB 991216, Optical Afterglow
  92. GRB 991216: Comparison with DPOSS images
  93. GRB 991208 optical observations
  94. Lowell/Perkins observation of GRB 991216
  95. GRB 991216 Optical Observation
  96. GRB 991208 Keck Spectroscopy
  97. GRB 991216: Extremely bright BATSE burst
  98. GRB991208, optical observations
  99. GRB 991208 Keck Spectroscopy
  100. GRB991208 - millimeter detection

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