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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 010222
  2. GRB 010222 HST/Chandra TOO
  3. GRB 010222
  4. GRB010222 further R-band photometry
  5. GRB010222: R-band data
  6. GRB010222 Optical observations
  7. GRB 010222: Keck Spectroscopy
  8. GRB010214, field photometry
  9. GRB010222, field photometry
  10. GRB010222 further R-band photometry
  11. GRB010222, possible increase of optical decay slope
  12. GRB 010222 Kyoto optical observation
  13. GRB010222: fading behavior
  14. GRB 010222 BV optical observations
  15. GRB010220, Optical Observations
  16. GRB010222 R-BAND OBSERVATION
  17. GRB 010220: Near-IR Observations
  18. GRB010214 follow-up from Hanle
  19. GRB 010222: Near-IR Observations
  20. GRB 010222: Optical Observations
  21. GRB 010222, Decay Slope Confirmed
  22. GRB010222: Another absorption line system
  23. GRB010222: Optical decay slope
  24. GRB 010214, Optical Observations
  25. GRB010222: Sub-millimeter detection
  26. GRB010222: R-band fading behavior
  27. GRB010222: Optical Observations
  28. GRB010222, radio observations
  29. GRB010222, optical observations
  30. GRB010222: BeppoSAX/NFI Observations
  31. Redshift of the Optical Transient of GRB010222
  32. GRB010214B,Gamma Ray Observations
  33. GRB010222: possible optical counterpart
  34. GRB010222
  35. GRB010222
  36. GRB010222: BeppoSAX refined position
  37. ALERT: GRB010222: the brightest GRB observed by BeppoSAX
  38. GRB010220, Radio and Optical Observations
  39. GRB 010220, simultaneous optical observations
  40. GRB010220: BeppoSAX WFC and GRBM preliminary data
  41. GRB010214, candidate optical afterglow
  42. GRB010214, optical observations
  43. BeppoSAX GRB010220: refined position
  44. BeppoSAX ALERT: GRB010220
  45. GRB010214: BeppoSAX WFC and GRBM preliminary data
  46. GRB 010214: X-Ray afterglow
  47. GRB 010214, Optical Observations
  48. GRB 010214 optical observation
  49. GRB010213, Radio Observations
  50. GRB010213 Optical Observation
  51. GRB010213, Radio Observations
  52. J-Band Observation of GRB 010214.
  53. GRB010214, Radio Observations
  54. GRB010214, optical observations
  55. GRB010213, optical observations
  56. GRB010213, Near-IR observations
  57. Possible InfraRed Transient of GRB 010214.
  58. GRB010214 Optical Observation
  59. GRB010214: BeppoSAX/NFI Observations
  60. GRB010213 (HETE) TAROT observations
  61. GRB 010214, optical observations
  62. GRB010213 detected by HETE
  63. GRB010214 refined WFC position
  64. BeppoSAX ALERT: GRB010214
  65. IPN Status Report
  66. HETE Status
  67. GRB010126 opt. obs.
  68. IPN/RXTE TRIANGULATION OF GRB010126
  69. GRB010126: CONCAM crude optical limits during GRB
  70. GRB010126, TNG R-band observations
  71. GRB010126 Optical Observations
  72. GRB010126 optical observations
  73. GRB010126: Optical observations
  74. IPN TRIANGULATION OF GRB010126
  75. IPN/RXTE TRIANGULATION OF GRB010126
  76. GRB 010119, optical observations
  77. GRB010119: Optical observations
  78. Optical Observations of GRB 001018 at Keck
  79. GRB010119, Radio observations
  80. IPN TRIANGULATION OF GRB010119 (SHORT/HARD)
  81. Optical observations of GRB 001018 with JCAM
  82. IPN TRIANGULATION OF GRB010115
  83. IPN TRIANGULATION OF GRB010109
  84. IPN TRIANGULATION OF GRB010109
  85. GRB010103, optical observations
  86. IPN triangulation of GRB010104
  87. IPN triangulation of GRB010103
  88. GRB 001204: Ks observations
  89. H band observation of GRB 001212
  90. GRB & BeppoSAX: ground operations restored back to 24 hrs a day
  91. IPN triangulation of GRB001219
  92. GRB 001212 Optical Observation
  93. GRB 001212 Optical Observation
  94. GRB 001212 optical observation
  95. GRB 001212 possible OA in 2MASS
  96. GRB 001212 possible OA
  97. IPN triangulation of GRB001212
  98. GRB001204: Optical observations
  99. Confirmation of IPN position for GRB001204
  100. GRB001204, Radio observations

Advanced

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