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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"

37763 results found.

  1. GRB 101225A (Swift trigger 441015): optical upper limit
  2. Trigger 441015: Swift detection of a possible burst or transient
  3. GRB 101224A: NOT optical observation
  4. GRB 101224A: Pre-event imaging from DeepSky; Detection of a source in the XRT error circle
  5. GRB 101224A: Swift/UVOT Upper Limits
  6. GRB 101224A: Fermi GBM observation
  7. GRB 101224A: Swift-XRT refined Analysis
  8. GRB101224A: MITSuME Okayama optical upper limits
  9. GRB 101224A, Swift-BAT refined analysis
  10. GRB 101224A - UVOT-enhanced XRT position
  11. GRB 101224A: Swift detection of a short burst
  12. GRB 101219A: Chandra Observations
  13. GRB 101219B: Swift/UVOT refined analysis
  14. GRB 101219B: Swift-XRT refined Analysis
  15. GRB 101219B: Enhanced Swift-XRT position
  16. GRB 101219A: MITSuME Ishigakijima Optical upper limits
  17. GRB 101219B: GROND Detection of the Optical/NIR Afterglow
  18. GRB 101219B: Fermi GBM observation
  19. GRB 101219A: IAC80 optical observations
  20. GRB 101219B: Swift-BAT refined analysis
  21. GRB 101219A: Swift-XRT refined Analysis
  22. GRB 101219B: Swift detection of a burst with an optical afterglow
  23. GRB 101219A: Swift/UVOT Upper Limits
  24. GRB 101219A: GROND Upper limits
  25. Konus-Wind observation of short hard GRB 101219A
  26. GRB 101219A: Magellan NIR observations
  27. GRB 101219A: Further Gemini-South Imaging
  28. GRB 101219A: Swift-BAT refined analysis
  29. GRB 101219A - NOT observation - upper limit
  30. GRB 101219A: SARA-N Upper Limit
  31. GRB 101219A: Gemini-South observations
  32. GRB 101219A: REM optical and NIR observations
  33. GRB 101219A: ROTSE-III Optical Limits
  34. GRB 101219A: Swift detection of a short hard burst
  35. Request for Supernova related data for GRB 101023A
  36. GRB 101213A : Suzaku WAM observation of the prompt emission
  37. Redshift solution(s) for GRB101213A from Swift-XRT data
  38. Konus-Wind observation of GRB 101213A
  39. GRB 101213A: Fermi GBM observation
  40. GRB 101213A, Swift-BAT refined analysis
  41. GRB 101213A: Swift-XRT refined Analysis
  42. GRB 101213A: Swift/UVOT Upper Limits
  43. GRB 101213A: Enhanced Swift-XRT position
  44. GRB 101213: object within the X-ray error circle
  45. GRB 101213A: Swift detection of a burst
  46. GRB101204A: Swift/UVOT observations
  47. GRB 101204A: Swift-XRT refined Analysis
  48. GRB101204A GROND Detection of the Optical/NIR Afterglow
  49. GRB 101204A Afterglow Candidate, VATT Observations
  50. GRB 101129A : Suzaku WAM observation of the prompt emission
  51. GRB 101204A Swift-XRT/UVOT afterglow candidate
  52. Konus-Wind observation of GRB 101130A
  53. GRB 101204A detected in ground analysis of BAT data
  54. Konus-Wind observation of GRB 101129A
  55. IPN Localization of GRB101130 (possible short duration burst)
  56. GRB 101129A SHB found by IPN and in ground analysis of BAT data
  57. GRB101030A
  58. GRB 101201A: Fermi GBM observation
  59. GRB 101201A: Swift-XRT refined Analysis
  60. GRB 101201A: Swift/UVOT Detection
  61. GRB 101201A: GROND Detection of the Optical/NIR Afterglow
  62. GRB 101201A detected in ground analysis of BAT data
  63. GRB 101123A: ROTSE optical observations
  64. GRB 101123A: MASTER prompt optical observations
  65. Konus-Wind observation of GRB 101123A
  66. IPN triangulation of bright GRB 101123A
  67. GRB 101123A: Fermi GBM detection
  68. Optical observation of GRB 101024A
  69. GRB 101117B: GROND Upper limits
  70. GRB 101117B: Swift/UVOT Observations of the Optical Afterglow
  71. GRB 101112A: OSN and BTA observations
  72. GRB 101117B: Swift-XRT refined analysis
  73. GRB101114A: Swift/UVOT Upper Limits
  74. GRB 101114A: Confirmation of the X-ray afterglow
  75. GRB 101117B: Swift-BAT refined analysis
  76. GRB 101117B: Enhanced Swift-XRT position
  77. GRB 101117B: Swift/UVOT Discovery of an Optical Afterglow
  78. GRB 101117B: Swift detection of a burst
  79. GRB 101114A: GROND Upper limits
  80. Konus-Wind observation of GRB 101114A
  81. Fermi GBM detection of a burst from a galactic source
  82. GRB 101114A: Swift-XRT candidate afterglow detection and analysis
  83. GRB 101114A, Swift-BAT GRB detected by ground processing
  84. Possible detection of INTEGRAL burst GRB 101112A by the EVLA
  85. GRB 101112A: Fermi GBM detection
  86. GRB 101112A: optical observations
  87. GRB 10112A: MASTER optical observations
  88. Konus-Wind observation of GRB 101112A
  89. GRB 101112A - XRT source detection/analysis
  90. GRB 101112A: BOOTES-2/TELMA optical afterglow candidate
  91. GRB101112A: Liverpool Telescope Afterglow Candidate
  92. GRB 101112A: a long GRB detected by INTEGRAL
  93. GRB 100906A: optical observations
  94. GRB 090113, the review of the sky area in plate archives
  95. GRB 101030A : MOA optical observation
  96. GRB 101030A: GROND optical/NIR afterglow candidate
  97. GRB 101030A : Swift XRT refined analysis
  98. GRB 101030A: Swift/UVOT Upper Limits
  99. GRB 101030A: Swift-BAT refined analysis
  100. GRB 101030A: Enhanced Swift-XRT position

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