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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"

32553 results found.

  1. GRB 080810, Swift-BAT refined analysis
  2. GRB 080810 : optical observation with KANATA
  3. GRB 080723B: GROND upper limits
  4. GRB 080723B: XMM-Newton observation
  5. GRB 080805: VLT redshift update
  6. GRB 080805: Faulkes Telescope South optical observations
  7. GRB 080804: GROND observations
  8. GRB 080727B: Late VLT imaging
  9. GRB 080804: ATCA Radio Observations
  10. GRB 080805: Swift-XRT Refined Analysis
  11. GRB 080805: Swift/UVOT Upper Limits
  12. GRB 080804: Swift-XRT Refined Analysis
  13. GRB 080804: Swift/UVOT Refined Analysis
  14. GRB 080805, Swift-BAT refined analysis
  15. GRB 080804, Swift-BAT refined analysis
  16. GRB080804: Gemini South redshift confirmation
  17. GRB 080804: Faulkes Telescope South observations
  18. GRB 080805: VLT redshift
  19. GRB 080805: Afterglow confirmation
  20. GRB 080805: GROND detection of possible afterglow
  21. GRB 080804: UVES redshift
  22. GRB 080804: ROTSE-III Detection of Optical Counterpart
  23. GRB 080802: Swift/UVOT Upper Limits
  24. GRB 080802: Swift-XRT Refined Analysis
  25. GRB 080802: UVI Telescope Upper Limit
  26. GRB 080802, Swift-BAT refined analysis
  27. GRB 080727C: Suzaku WAM observation of the prompt emission
  28. GRB 080727B: IR photometry
  29. GRB 080727A: Early IR observations
  30. GRB 080727C: TAROT Calern observatory optical observations
  31. GRB 080727B: KAIT photometry and an early lightcurve break
  32. GRB 080727B: GROND redshift limit
  33. GRB 080727C, Swift-BAT refined analysis
  34. GRB 080727C: Swift/UVOT Upper Limits
  35. Konus-Wind observation of GRB 080727B
  36. GRB 080727C: Swift XRT refined analysis
  37. GRB 080727C: Liverpool Telescope observations
  38. GRB 080727A: VLT upper limits
  39. GRB 080727B: REM NIR afterglow prompt detection
  40. GRB080727C: RTT150 optical observations
  41. GRB 080727B: Swift/UVOT Upper Limits
  42. GRB 080727B: Swift-XRT refined analysis
  43. GRB 080727B, Swift-BAT refined analysis
  44. GRB 080727A, Swift-BAT refined analysis
  45. GRB 080727A: Swift-XRT refined analysis
  46. GRB080727A: Swift/UVOT Upper Limits
  47. GRB 080727B: KAIT observations
  48. GRB 080727B: REM prompt observations
  49. GRB 080725, Swift-BAT refined analysis
  50. GRB 080723A: optical upper limit
  51. GRB080723B: Swift/UVOT Upper Limits
  52. GRB 080725: REM prompt observations
  53. Konus-Wind observation of GRB 080723B
  54. ATCA radio upper limit on GRB 080723B
  55. GRB 080723A: Swift/UVOT Upper Limits
  56. VLA radio upper limit on GRB 080721
  57. GRB 080723B - correction to flux conversion factor
  58. GRB 080723B - Swift-XRT refined analysis
  59. GRB 080723B - Swift-XRT position
  60. GRB 080723, Swift-BAT refined analysis
  61. GRB 080723B: AGILE GRID and MCAL results
  62. GRB 080723A: Swift-XRT refined analysis
  63. GRB 080723B: Detection and Localization by SuperAGILE
  64. GRB 080721 : Lulin 2nd optical follow-ups
  65. GRB 080721: OA fading and redshift
  66. TNG/DOLORES redshift for GRB080721
  67. GRB 080721: UVOT Follow-Up Observations
  68. Konus-Wind observation of GRB 080721
  69. GRB 080721: Swift-XRT refined analysis
  70. GRB 080721, Swift-BAT refined analysis
  71. GRB 080721: Swift/UVOT Photometric Redshift
  72. GRB 080721 : Lulin Optical follow-ups
  73. GRB 080721: Swift-XRT correct position
  74. Retraction of Swift Trigger 317393
  75. GRB 080714: GROND confirmation of the optical/NIR afterglow
  76. Konus-Wind observation of GRB 080714
  77. GRB 080714: Swift/UVOT Detection of an Optical Afterglow
  78. GRB 080714: Swift-XRT refined analysis
  79. GRB 080714: Swift-BAT refined analysis
  80. GRB 080702A: optical upper limit
  81. GRB 080603A: CrAO optical observations
  82. GRB 080603B: optical observations in MAO
  83. GRB 080603B: optical observations in CrAO
  84. GRB 080710: Optical observation with MITSuME Okayama
  85. GRB 080710: TLS observations, steepening afterglow decay
  86. GRB 080702B: Swift XRT confirmation of the afterglow
  87. GRB 080710, Swift-BAT refined analysis
  88. GRB 0800707: optical observations
  89. GRB 080710: Rapid PROMPT Observations
  90. GRB 080710: Swift-XRT refined analysis
  91. GRB080710: Swift/UVOT observations
  92. GRB 080710: Faulkes Telescope North observations
  93. GRB 080710: Gemini spectroscopy and probable redshift
  94. UVOT white band observations of GRB080710
  95. GRB 080710: REM afterglow confirmation & brightening
  96. GRB 080710: KAIT OA candidate
  97. GRB 080707: possible break in the X-rays
  98. New Swift-XRT GRB products available online.
  99. GRB 080707: GROND Confirmation of the Optical Afterglow
  100. UVOT observations of GRB080707

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