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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"

36153 results found.

  1. GRB 080714: Swift-XRT refined analysis
  2. GRB 080714: Enhanced Swift-XRT position
  3. GRB 080714: Swift-BAT refined analysis
  4. GRB 080714: Swift detection of a burst
  5. GRB 080702A: optical upper limit
  6. GRB 080603A: CrAO optical observations
  7. GRB 080603B: optical observations in MAO
  8. GRB 080603B: optical observations in CrAO
  9. GRB 080710: Optical observation with MITSuME Okayama
  10. GRB 080710: TLS observations, steepening afterglow decay
  11. GRB 080702B: Swift XRT confirmation of the afterglow
  12. GRB 080710: Lick IR detection
  13. GRB 080710, Swift-BAT refined analysis
  14. GRB 0800707: optical observations
  15. GRB 080710: Rapid PROMPT Observations
  16. GRB 080710: Swift-XRT refined analysis
  17. GRB080710: Swift/UVOT observations
  18. GRB 080710: Enhanced Swift-XRT position
  19. GRB 080710: Faulkes Telescope North observations
  20. GRB 080710: Gemini spectroscopy and probable redshift
  21. UVOT white band observations of GRB080710
  22. GRB 080710: REM afterglow confirmation & brightening
  23. GRB 080710: KAIT OA candidate
  24. GRB 080710: Swift XRT position
  25. GRB 080710: Swift detection of a burst
  26. GRB 080707: possible break in the X-rays
  27. New Swift-XRT GRB products available online.
  28. GRB 080707: GROND Confirmation of the Optical Afterglow
  29. UVOT observations of GRB080707
  30. GRB 080707, Swift-BAT refined analysis
  31. GRB 080707: Swift XRT refined analysis
  32. GRB 080707: Enhanced Swift-XRT position
  33. GRB 080707: VLT redshift
  34. GRB 080707: GROND Detection of the Optical Afterglow Candidate
  35. GRB 080707: Swift detection of a burst
  36. Refined analysis of Swift Trigger 316063, is IGR J08408-4503
  37. Trigger 316063: Swift detection of a transient
  38. GRB 080703: GROND Upper Limits
  39. GRB 080702B: GROND Upper Limits
  40. GRB 080703: Swift-XRT refined analysis
  41. GRB 080703: UVOT Follow-Up Observation
  42. GRB 080703: VLT observations of the afterglow
  43. GRB 080703: Enhanced Swift-XRT position
  44. GRB 080703, Swift-BAT refined analysis
  45. GRB 080702B Swift-BAT refined analysis
  46. GRB 080703: Swift detection of a burst with optical afterglow
  47. GRB 080703A: ROTSE-III Detection of Optical Counterpart
  48. No radio detection from the short GRB 080702A
  49. GRB 080702b: LCO optical observations
  50. GRB 080702B: Swift XRT and UVOT observations
  51. GRB 080625: Suzaku WAM observation of the prompt emission
  52. GRB 080702A: MITSuME Akeno optical upper limits
  53. GRB 080701A: Early RAPTOR optical limits
  54. GRB 080702A, Swift-BAT refined analysis
  55. GRB 080702A: Swift-XRT Team refined analysis
  56. GRB 080702B : Burst detected in BAT during Swift slew
  57. GRB 080702A: Enhanced Swift-XRT position
  58. Swift Trigger 315630: Probably not a GRB
  59. GRB 080702: Swift detection of a short burst
  60. GRB 080701: Swift-XRT refined analysis
  61. GRB 080701A, VATT optical upper limit
  62. TLS I-Band Observation of GRB 080701A
  63. GRB 080701A: Swift/UVOT Upper Limits
  64. GRB 080701A: Early Super-LOTIS Observations
  65. GRB 080701: Enhanced Swift-XRT position
  66. GRB 080701A, Swift-BAT refined analysis
  67. GRB 080701: Swift-XRT Prompt Analysis
  68. GRB 080701: Swift detection of a burst
  69. GRB 080623: Suzaku WAM observation of the prompt emission
  70. GRB 080625: Swift/UVOT Follow-Up Observations
  71. GRB 080625: Further observations from OSN
  72. GRB 080625:Swift-XRT detection of the afterglow
  73. GRB 080625: Swift/UVOT Detection of an Optical Afterglow
  74. GRB 080625: Observations at OSN
  75. GRB 080625: Gamma Ray Burst Localization by SuperAGILE
  76. GRB 080623: GROND upper limits
  77. GRB080623: Swift UVOT followup observations
  78. GRB 080623: Swift-XRT refined analysis
  79. GRB 080623, Swift-BAT refined analysis
  80. GRB 080623: Enhanced Swift-XRT position
  81. GRB 080623: TAROT La Silla observatory optical observations
  82. GRB 080623: Swift/UVOT Non-Detection of an Optical Afterglow
  83. GRB 080623: Swift XRT prompt analysis
  84. GRB 080623: Swift detection of a burst
  85. Swift trigger 314975 is not a GRB
  86. GRB080607: optical observation
  87. GRB 080603b: optical observation
  88. GRB 070809: Putative host galaxy and redshift
  89. VLA upper limit on INTEGRAL burst GRB 080613A
  90. GRB 0800603A: optical observation
  91. GRB080613B: MITSuME upper limits
  92. GRB080613A: Optical upper limits with Okayama MITSuME telescope
  93. Konus-Wind observation of GRB 080613B
  94. GRB 080603A: optical observations on June 04
  95. GRB 080613A: Swift-XRT detection of the afterglow
  96. GRB080613A: Swift/UVOT Upper Limits
  97. GRB 080613A: GROND Confirmation of the Afterglow Candidate
  98. GRB 080613B: GROND Upper Limits
  99. GRB 080613B - NOT optical and IR nondetections
  100. GRB080613B: Swift/UVOT Upper Limits

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