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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"

42667 results found.

  1. GRB 111215A: Swift-BAT refined analysis
  2. GRB 111215A: OSN I-band observations
  3. GRB 111215A: MASTER-Net optical prompt and follow up observations
  4. GRB 111215A, Optical Observations
  5. GRB 111209A: RAPTOR Limits Before and During the Gamma-ray Emitting Interval
  6. GRB 111215A: GMG optical upper limit
  7. GRB 111215A: Swift detection of a burst
  8. GRB 111212A: GROND observations
  9. GRB 111211A: VLT/X-shooter redshift
  10. Konus-Wind observation of GRB 111211A
  11. GRB 111211A: NOT afterglow confirmation
  12. GRB 111212A: Swift-XRT refined Analysis
  13. GRB 111211A: Swift/XRT target of opportunity observation
  14. GRB 111212A: Swift/UVOT Upper Limits
  15. GRB 111212A: Swift-BAT refined analysis
  16. GRB 111212A: Enhanced Swift-XRT position
  17. GRB 111212A: Swift-XRT observations
  18. GRB 111211A: GROND afterglow candidate
  19. GRB 111212A: Swift detection of a burst
  20. GRB 111211A: SuperAGILE localization of a long GRB
  21. GRB 111209A - ATCA 34GHz upper limit
  22. Konus-Wind observation of GRB 111209A
  23. GRB 111210A: GROND observations
  24. GRB 111210A: SDSS prior imaging
  25. GRB 111210A: Swift-XRT refined Analysis
  26. GRB 111208A: Swift-XRT refined analysis
  27. GRB 111210A: Gemini-North candidate counterpart
  28. GRB 111209A: Rebrightening seen by GROND
  29. GRB111210A: MITSuME Okayama J-band upper-limit
  30. GRB 111210A: Enhanced Swift-XRT position
  31. GRB 111210A: Swift-BAT refined analysis
  32. GRB 111210A: Swift detection of a burst
  33. GRB 111209A: IRTF NIR Imaging/Spectroscopy
  34. GRB 111209A: VLT/X-shooter redshift
  35. GRB 111209A: GROND Afterglow observations
  36. GRB 111209A: PROMPT optical observations of early afterglow
  37. GRB 111209A: Swift-XRT refined Analysis
  38. GRB 111209A: Swift UVOT refined analysis
  39. GRB 111209A: Swift Burst of Interest
  40. GRB 111209A, Swift-BAT refined analysis
  41. GRB 111209A: Enhanced Swift-XRT position
  42. GRB111209A : planned XMM-Newton observation
  43. GRB 111209A: TAROT La Silla observatory optical light curve analysis
  44. GRB 111205A: GROND observations
  45. GRB 111209A: Faulkes Telescope North observations
  46. GRB 111209A: REM NIR detection
  47. GRB 111209A: TAROT La Silla observatory optical detection
  48. GRB 111209A: Swift detection of a long burst with an optical counterpart
  49. GRB 111208A: Swift XRT/UVOT observations
  50. GRB 111205A: Swift XRT Observations
  51. GRB 111207A found in ground analysis of BAT data
  52. GRB 111208A found in ground analysis of BAT data
  53. Konus-Wind observation of GRB 111205A
  54. IPN Triangulation of GRB 111205A (long/hard/intense)
  55. GRB 111117A: Refined GMG observation
  56. GRB 111204A: TNG NIR observations
  57. GRB 111201A: GMG optical observation
  58. GRB 111204A: GROND Observations
  59. GRB 111204A: Swift-XRT refined Analysis
  60. GRB 111204A, Swift-BAT refined analysis
  61. GRB 111022B: CrAO optical limit
  62. GRB 110921A: optical observations in Maidanak observatory
  63. GRB 111204A: MASTER optical observations
  64. GRB 111123A: optical upper limit in CrAO: correction to the GCN circ. 12613
  65. GRB 111204A: Enhanced Swift-XRT position
  66. GRB 111123A: optical upper limit in CrAO
  67. GRB 111204A: Swift detection of a burst
  68. GRB 111201A: Confirmation of the X-ray afterglow
  69. GRB111201A: Swift-XRT observations
  70. GRB 111201A found in ground analysis of BAT data
  71. GRB 111121A: Suzaku WAM observation of the prompt emission
  72. GRB 111129A: Swift/UVOT Detection
  73. GRB 111129A, GROND afterglow observations
  74. GRB 111129A: Swift-XRT refined Analysis
  75. GRB 111129A: Swift-BAT refined analysis
  76. GRB 111129A: Enhanced Swift-XRT position
  77. GRB 111129A: Swift detection of a burst with an optical counterpart
  78. GRB 111126A found in ground analysis of BAT data
  79. GRB 111123A, Swift-BAT refined analysis
  80. GRB 111123A: Swift/UVOT Upper Limits
  81. GRB 111123A - NOT optical observations
  82. GRB 111123A, GROND observations
  83. GRB 111123A: correction to GCN 12593
  84. GRB 111123A: TNG NIR detection of the afterglow candidate
  85. GRB 111123A: Swift-XRT refined Analysis
  86. GRB 111123A: Enhanced Swift-XRT position
  87. GRB 111123A: GMG optical observation
  88. GRB 111117A: Refined Chandra Astrometry
  89. GRB 111123A: Swift detection of a burst
  90. Konus-Wind observation of GRB 111121A
  91. GRB 111121A: Swift/UVOT Upper Limits
  92. GRB 111121A: Magellan/Megacam observations
  93. GRB 111121A: Swift-XRT refined Analysis
  94. GRB 111121A: Swift-BAT refined analysis
  95. GRB 111117A: Chandra detection of the afterglow
  96. GRB 111121A: Enhanced Swift-XRT position
  97. GRB 111121A: Swift detection of a short hard burst
  98. GRB 111117A: Gemini Afterglow Limits
  99. GRB 111117A: optical upper limit in CrAO
  100. GRB 111117A: Fermi GBM observation

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