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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"

28113 results found.

  1. GRB 080319B: Change in power law decay index
  2. GRB 080319B: Gemini-South Spectroscopy
  3. GRB 080319A: optical observations at the NOT
  4. GRB 080319B: REM observations
  5. GRB080319A: P60 Optical Afterglow Observations
  6. GRB 080319B: Swift detection of an intense burst with a bright optical counterpart
  7. GRB 080319A: Swift detection of a burst
  8. Swift Trigger 306745 is not a GRB
  9. Swift Trigger 306616 is not a GRB
  10. GRB080315: Bok Optical Observations
  11. Swift/UVOT observations of GRB 080315
  12. Swift trigger 306323: Swift-BAT/XRT refined analysis
  13. GRB 080315: Optical observations
  14. GRB 080315: TAROT Calern observatory optical observations
  15. GRB 080315: Swift detection of a possible burst
  16. GRB 080307: GAO 150cm telescope Optical Observation
  17. GRB 080229A: GAO 150cm telescope Optical Observation
  18. GRB 080310, Swift-BAT refined analysis
  19. GRB080210: optical observations
  20. GRB 080310: Swift-XRT refined analysis
  21. GRB 080310: Swift/UVOT Refined Analysis
  22. GRB 080310 - SDSS Pre-Burst Observations
  23. GRB 080310: Enhanced Swift-XRT position
  24. GRB 080310: RRM optical photometry with the VLT
  25. GRB080310, optical observations with LBT
  26. GRB 080310: REM observations
  27. GRB 080310: Swift detection of a burst with optical afterglow
  28. GRB080307, optical upper limit
  29. GRB080229, optical upper limit
  30. GRB 080307: Swift-XRT Team refined analysis
  31. GRB 080307: Swift/UVOT Upper Limits
  32. GRB 080307, Swift-BAT refined analysis
  33. GRB080307 - SDSS Pre-Burst Observations
  34. GRB 080307: TNT optical observation
  35. GRB080307: Optical upper limits
  36. GRB 080307: Gemini-N i-band observations - candidate afterglow
  37. GRB 080307: retraction of UVOT candidate
  38. GRB 080307: Enhanced Swift-XRT position
  39. GRB 080307, Preliminary Swift-BAT refined analysis
  40. GRB 080307: Optical observation with DMC/KANATA
  41. GRB 080307: Swift detection of a burst
  42. VLA possible radio detection of GRB 080229
  43. GRB 080303, Swift-BAT refined analysis
  44. GRB080303: Swift XRT refined analysis
  45. GRB 080303: Enhanced Swift-XRT position
  46. Swift UVOT observations of GRB080229B
  47. GRB080229B: Swift XRT afterglow observation
  48. GRB 080303: Swift detection of a burst with optical afterglow
  49. GRB 080303: REM NIR afterglow candidate
  50. GRB 080303A: ROTSE-III Optical Limits
  51. GRB 080229: I-band observations from OSN
  52. GRB 080229: VLT NIR observations
  53. GRB080229: Swift XRT refined analysis
  54. GRB 080229: TNG NIR observations
  55. GRB 080229: Enhanced Swift-XRT position
  56. GRB 080229: REM NIR observations
  57. GRB080229: Possible optical afterglow
  58. GRB 080229B: Gamma Ray Burst Localization by SuperAGILE
  59. UVOT analysis for GRB080229
  60. GRB 080229, Swift-BAT refined analysis
  61. GRB 080229A: ROTSE-III Optical Limits
  62. GRB 080229: Swift detection of a bright burst
  63. XRF 080109/SN2008D : GMRT upper limit at 1.28 GHz
  64. Swift-XRT improved positions, and new redshift limits.
  65. ESO optical and NIR observations of GRB 080218B
  66. GRB 080204: Suzaku WAM observation of the prompt emission
  67. GRB 080218B, Swift-BAT refined analysis
  68. GRB 080218B: Swift-XRT refined analysis
  69. Swift/UVOT observations of GRB080218B
  70. GRB 080218B: REM NIR early upper limits
  71. GRB 080218B: Enhanced Swift-XRT position
  72. GRB 080218B: GROND upper limits
  73. GRB 080218A, Swift-BAT refined analysis
  74. GRB 080211: Suzaku WAM observation of the prompt emission
  75. Swift-XRT and UVOT observations of the IPN burst GRB 080211
  76. VLA radio upper limit on GRB 080212
  77. Swift/UVOT refined analysis of GRB080212
  78. GRB 080212, Swift-BAT refined analysis
  79. GRB080212: Optical afterglow candidate observed by MITSuME Telescope
  80. GRB 080212: GROND detects afterglow
  81. GRB 080212: REM NIR afterglow?
  82. GRB 080212: Enhanced Swift-XRT position
  83. GRB 080212: Swift-XRT Team refined analysis
  84. GRB 080210: Keck photometry
  85. VLA non-detection of GRB 080210
  86. GRB 080212: Swift detection of a burst
  87. GRB 080207: VLT NIR early upper limits
  88. GRB 080210: Swift/UVOT Refined Analysis
  89. GRB 080210, Swift-BAT refined analysis
  90. GRB 080210: Super-LOTIS observations
  91. GRB 080210: Swift-XRT Refined Analysis
  92. GRB 080210: Enhanced Swift-XRT position
  93. GRB 080210: GOND detection in all bands and redshift upper limit
  94. GRB080210 - SDSS Pre-Burst Observations
  95. GRB 080210: Swift detection of a burst with optical afterglow
  96. GRB 080210: TAROT La Silla observatory optical detection
  97. GRB 080207: GROND upper limits
  98. GRB 080205: GAO 150cm telescope Optical limit
  99. GRB 080207, Swift-BAT refined analysis
  100. GRB 080207: Optical limits from Gemini-South

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