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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"

28108 results found.

  1. GRB 080319B: Swift detection of an intense burst with a bright optical counterpart
  2. GRB 080319A: Swift detection of a burst
  3. Swift Trigger 306745 is not a GRB
  4. Swift Trigger 306616 is not a GRB
  5. GRB080315: Bok Optical Observations
  6. Swift/UVOT observations of GRB 080315
  7. Swift trigger 306323: Swift-BAT/XRT refined analysis
  8. GRB 080315: Optical observations
  9. GRB 080315: TAROT Calern observatory optical observations
  10. GRB 080315: Swift detection of a possible burst
  11. GRB 080307: GAO 150cm telescope Optical Observation
  12. GRB 080229A: GAO 150cm telescope Optical Observation
  13. GRB 080310, Swift-BAT refined analysis
  14. GRB080210: optical observations
  15. GRB 080310: Swift-XRT refined analysis
  16. GRB 080310: Swift/UVOT Refined Analysis
  17. GRB 080310 - SDSS Pre-Burst Observations
  18. GRB 080310: Enhanced Swift-XRT position
  19. GRB 080310: RRM optical photometry with the VLT
  20. GRB080310, optical observations with LBT
  21. GRB 080310: REM observations
  22. GRB 080310: Swift detection of a burst with optical afterglow
  23. GRB080307, optical upper limit
  24. GRB080229, optical upper limit
  25. GRB 080307: Swift-XRT Team refined analysis
  26. GRB 080307: Swift/UVOT Upper Limits
  27. GRB 080307, Swift-BAT refined analysis
  28. GRB080307 - SDSS Pre-Burst Observations
  29. GRB 080307: TNT optical observation
  30. GRB080307: Optical upper limits
  31. GRB 080307: Gemini-N i-band observations - candidate afterglow
  32. GRB 080307: retraction of UVOT candidate
  33. GRB 080307: Enhanced Swift-XRT position
  34. GRB 080307, Preliminary Swift-BAT refined analysis
  35. GRB 080307: Optical observation with DMC/KANATA
  36. GRB 080307: Swift detection of a burst
  37. VLA possible radio detection of GRB 080229
  38. GRB 080303, Swift-BAT refined analysis
  39. GRB080303: Swift XRT refined analysis
  40. GRB 080303: Enhanced Swift-XRT position
  41. Swift UVOT observations of GRB080229B
  42. GRB080229B: Swift XRT afterglow observation
  43. GRB 080303: Swift detection of a burst with optical afterglow
  44. GRB 080303: REM NIR afterglow candidate
  45. GRB 080303A: ROTSE-III Optical Limits
  46. GRB 080229: I-band observations from OSN
  47. GRB 080229: VLT NIR observations
  48. GRB080229: Swift XRT refined analysis
  49. GRB 080229: TNG NIR observations
  50. GRB 080229: Enhanced Swift-XRT position
  51. GRB 080229: REM NIR observations
  52. GRB080229: Possible optical afterglow
  53. GRB 080229B: Gamma Ray Burst Localization by SuperAGILE
  54. UVOT analysis for GRB080229
  55. GRB 080229, Swift-BAT refined analysis
  56. GRB 080229A: ROTSE-III Optical Limits
  57. GRB 080229: Swift detection of a bright burst
  58. XRF 080109/SN2008D : GMRT upper limit at 1.28 GHz
  59. Swift-XRT improved positions, and new redshift limits.
  60. ESO optical and NIR observations of GRB 080218B
  61. GRB 080204: Suzaku WAM observation of the prompt emission
  62. GRB 080218B, Swift-BAT refined analysis
  63. GRB 080218B: Swift-XRT refined analysis
  64. Swift/UVOT observations of GRB080218B
  65. GRB 080218B: REM NIR early upper limits
  66. GRB 080218B: Enhanced Swift-XRT position
  67. GRB 080218B: GROND upper limits
  68. GRB 080218A, Swift-BAT refined analysis
  69. GRB 080211: Suzaku WAM observation of the prompt emission
  70. Swift-XRT and UVOT observations of the IPN burst GRB 080211
  71. VLA radio upper limit on GRB 080212
  72. Swift/UVOT refined analysis of GRB080212
  73. GRB 080212, Swift-BAT refined analysis
  74. GRB080212: Optical afterglow candidate observed by MITSuME Telescope
  75. GRB 080212: GROND detects afterglow
  76. GRB 080212: REM NIR afterglow?
  77. GRB 080212: Enhanced Swift-XRT position
  78. GRB 080212: Swift-XRT Team refined analysis
  79. GRB 080210: Keck photometry
  80. VLA non-detection of GRB 080210
  81. GRB 080212: Swift detection of a burst
  82. GRB 080207: VLT NIR early upper limits
  83. GRB 080210: Swift/UVOT Refined Analysis
  84. GRB 080210, Swift-BAT refined analysis
  85. GRB 080210: Super-LOTIS observations
  86. GRB 080210: Swift-XRT Refined Analysis
  87. GRB 080210: Enhanced Swift-XRT position
  88. GRB 080210: GOND detection in all bands and redshift upper limit
  89. GRB080210 - SDSS Pre-Burst Observations
  90. GRB 080210: Swift detection of a burst with optical afterglow
  91. GRB 080210: TAROT La Silla observatory optical detection
  92. GRB 080207: GROND upper limits
  93. GRB 080205: GAO 150cm telescope Optical limit
  94. GRB 080207, Swift-BAT refined analysis
  95. GRB 080207: Optical limits from Gemini-South
  96. Swift detection of AX J1749.1-2639
  97. GRB 080207: Super-LOTIS observations
  98. GRB 080207, Swift-BAT refined analysis
  99. Swift Trigger 302777 is not a GRB
  100. GRB080207: RTT150 Optical Observations

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