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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"

45534 results found.

  1. GRB080319B Liverpool Telescope optical afterglow candidate
  2. GRB 080319B: Super-LOTIS Detection of a Bright OT
  3. GRB 080319B: REM observations
  4. GRB 080319B: KAIT OA
  5. GRB080319A: P60 Optical Afterglow Observations
  6. GRB 080319B: UVOT Position
  7. GRB 080319B: Swift detection of an intense burst with a bright optical counterpart
  8. GRB 080319A: Swift detection of a burst
  9. Swift Trigger 306745 is not a GRB
  10. Swift Trigger 306616 is not a GRB
  11. GRB080310, LBT and MDM photometry
  12. GRB080315: Bok Optical Observations
  13. Swift/UVOT observations of GRB 080315
  14. Swift trigger 306323: Swift-BAT/XRT refined analysis
  15. SAX J1818.6-1703: Swift detection (trigger 306379)
  16. GRB 080315: Optical observations
  17. GRB 080315: TAROT Calern observatory optical observations
  18. GRB 080315: Swift detection of a possible burst
  19. GRB080310 : Lulin Optical observations
  20. GRB080310, unusual slow decay in the optical
  21. GRB 080310: GAO 150cm telescope Optical Observation
  22. GRB080310 : Optical observations by LOAO and Lulin
  23. GRB 080310: ROTSE-III Observations of Optical Counterpart
  24. GRB080310: Optical observation by MITSuME telescope
  25. GRB080310, optical observations with the LBT
  26. GRB 080307: GAO 150cm telescope Optical Observation
  27. GRB 080229A: GAO 150cm telescope Optical Observation
  28. GRB 080310: PAIRITEL detection and PAIRITEL+KAIT+UVOT SED
  29. GRB 080307: NIR upper limit
  30. GRB 080229: NIR upper limit
  31. GRB 080310: early RAPTOR multicolor observations
  32. GRB 080310, Swift-BAT refined analysis
  33. GRB080210: optical observations
  34. GRB080307: optical upper limit
  35. GRB 080310: Swift-XRT refined analysis
  36. GRB 080310: Swift/UVOT Refined Analysis
  37. GRB 080310: Redshift from Keck/DEIMOS Spectra
  38. GRB 080310 - SDSS Pre-Burst Observations
  39. GRB080310 : Lulin optical observation
  40. GRB 080310: Enhanced Swift-XRT position
  41. GRB 080310: RRM optical photometry with the VLT
  42. GRB080310, detection of break in optical
  43. GRB 080310: VLT/UVES spectroscopy
  44. GRB080310, optical observations with LBT
  45. GRB 080310: Magellan redshift revision
  46. GRB 080310: Lick/Kast Spectroscopy
  47. GRB080310: Super-LOTIS suggestion of brightening
  48. GRB 080310, SMARTS optical/IR afterglow observations
  49. GRB 080310: REM observations
  50. GRB 080310: Magellan redshift
  51. GRB 080310 afterglow candidate (correction to UT time)
  52. GRB 080310: Swift detection of a burst with optical afterglow
  53. GRB 080310 afterglow candidate
  54. GRB080229, optical upper limit (Correction)
  55. GRB080307, optical upper limit
  56. GRB080307 BOAO optical afterglow observation - detection of a possible OT
  57. GRB080229, optical upper limit
  58. GRB 080307: Swift-XRT Team refined analysis
  59. GRB 080307: Swift/UVOT Upper Limits
  60. GRB 080307: Early RAPTOR Limits
  61. GRB 080307, Swift-BAT refined analysis
  62. GRB080307 - SDSS Pre-Burst Observations
  63. GRB 080307: TNT optical observation
  64. GRB080307: Optical upper limits
  65. GRB 080307: Gemini-N i-band observations - candidate afterglow
  66. GRB 080307: BOAO imaging - retraction and new limit
  67. GRB 080307: retraction of UVOT candidate
  68. GRB 080307: Enhanced Swift-XRT position
  69. GRB 080307, Preliminary Swift-BAT refined analysis
  70. GRB 080307 : BOAO optical afterglow observation
  71. GRB 080307: Optical observation with DMC/KANATA
  72. GRB 080307: Swift detection of a burst
  73. VLA possible radio detection of GRB 080229
  74. GRB 080303: Swift/UVOT follow-up of afterglow detection
  75. GRB 080303, Swift-BAT refined analysis
  76. GRB 080303: Rapid PROMPT Detections
  77. GRB080303: Swift XRT refined analysis
  78. GRB 080303: Enhanced Swift-XRT position
  79. Swift UVOT observations of GRB080229B
  80. GRB080229B: Swift XRT afterglow observation
  81. GRB 080303A: Faulkes Telescope South optical afterglow observations
  82. GRB 080303
  83. GRB 080303: Swift detection of a burst with optical afterglow
  84. GRB 080303: REM NIR afterglow candidate
  85. GRB 080303A: ROTSE-III Optical Limits
  86. GRB 080229: I-band observations from OSN
  87. GRB 080229: VLT NIR observations
  88. GRB080229: Swift XRT refined analysis
  89. GRB 080229: TNG NIR observations
  90. GRB 080229: Deep Gemini/GMOS optical observations
  91. GRB 080229: Enhanced Swift-XRT position
  92. GRB 080229: REM NIR observations
  93. GRB080229: Possible optical afterglow
  94. GRB 080229B: Gamma Ray Burst Localization by SuperAGILE
  95. UVOT analysis for GRB080229
  96. GRB 080229, Swift-BAT refined analysis
  97. GRB 080229: Faulkes Telescope South optical limit
  98. GRB 080229A: ROTSE-III Optical Limits
  99. GRB 080229: Swift detection of a bright burst
  100. Early optical shallow decay in GRB 071112C

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