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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"

42885 results found.

  1. GRB 080405: Mars Oddysey and Swift-BAT detection, possible host galaxy
  2. GRB 080325: optical upper limit
  3. GRB 080328: GAO 150cm telescope Optical Observation
  4. GRB 080330: Prompt PROMPT Observations
  5. GRB080330: optical observations
  6. GRB 080319B: TORTORA light curve (Correction)
  7. GRB080330: optical observations
  8. GRB080330: Swift XRT refined analysis
  9. GRB 080330: REM optical observations
  10. GRB 080330, SMARTS optical/IR afterglow observations
  11. GRB 080330 Swift-UVOT refined analysis
  12. GRB 080328: Suzaku WAM observation of the prompt emission
  13. GRB 080330, Swift-BAT refined analysis
  14. Konus-Wind observation of GRB 080328
  15. GRB 080330: Redshift Confirmation from Hobby-Eberly Telescope Spectroscopy
  16. GRB080330: LOAO R-band Detection
  17. GRB 080330: GROND Observations
  18. GRB 080330: NOT redshift
  19. GRB 080330: TAROT Calern observatory optical observations
  20. GRB 080330A: PAIRITEL Infrared Detections
  21. GRB 080330: error in reported XRT position
  22. GRB080330 - SDSS Pre-Burst Observations
  23. GRB 080330: Liverpool Telescope Optical observations
  24. GRB 080330A: ROTSE-III Detection of Optical Counterpart
  25. GRB 080330: Swift detection of a burst with an optical counterpart
  26. GRB 080330: TAROT Calern observatory optical detection
  27. GRB 080319B: Continued Gemini-South followup and possible host galaxy
  28. GRB 080328: BTA optical imaging and spectroscopy
  29. GRB 080328, Swift-BAT refined analysis
  30. GRB 080328: Swift XRT refined analysis
  31. GRB 080325, Swift-BAT refined analysis
  32. Swift/UVOT observations of GRB080328
  33. GRB080325 - I and z-band Imaging
  34. GRB080319B, BVRcIc field calibration
  35. GRB 080328: Enhanced Swift-XRT position
  36. GRB080328: Faulkes Telescope North observations
  37. GRB 080328: Swift detection of a burst with an optical counterpart
  38. GRB 080325: Subaru detection of NIR afterglow candidate
  39. GRB080310, late-time photometry with LBT
  40. GRB 080325: MITSuME Akeno optical upper limits
  41. GRB080325: XRT Refined Analysis
  42. GRB 080325: GROND Observations
  43. GRB080319B: optical observations
  44. GRB 080325: Swift/UVOT Upper Limits
  45. GRB 080319C: Gemini-North spectroscopic redshift
  46. GRB 080325: Early observations from OSN
  47. GRB 080325: NIR afterglow candidate
  48. GRB 080319D: GROND Detection of the Optical Counterpart
  49. GRB 080325: Enhanced Swift-XRT position
  50. GRB 080325: Swift detection of a burst
  51. GRB 080319B : Apparent spectral evolution in very early Swift/XRT WT mode data: intrinsic or pile-up effect?
  52. IBAS Alert n. 5245: NOT a GRB
  53. GRB 080319B: Spitzer Mid-infrared Observations
  54. GRB 080319C: Suzaku WAM observation of the prompt emission
  55. GRB 080319B: Second & Third Epoch WSRT Radio Observations
  56. Radio Detection of GRB 080319B
  57. GRB 080320, Swift-BAT refined analysis
  58. GRB 080319D: GROND Observations
  59. GRB 080319B: TORTORA light curve
  60. GRB 080319B: optical upper limit
  61. GRB 080319D: optical upper limit
  62. GRB080319B: Time-Independent XRT Spectrum
  63. GRB 080319D, Swift-BAT refined analysis
  64. GRB 080319C: UVOT Observations
  65. GRB 080319B: UVOT Observations
  66. GRB 080319A: UVOT Observations
  67. GRB 080320: Swift XRT refined analysis
  68. GRB 080319B - CARMA mm Observations
  69. GRB 080320: Early Super-LOTIS Observations
  70. GRB 080320: J detection with FLAMINGOS
  71. GRB 080319D: Swift XRT refined analysis
  72. GRB 080320: optical limit
  73. GRB 080320: Gemini-N optical afterglow
  74. Konus-Wind observation of GRB 080319C
  75. GRB 080319B: Gemini-South photometry
  76. GRB 080319B: Allen Telescope Array Observations
  77. GRB 080319B optical observations
  78. GRB 080319C, Swift-BAT refined analysis
  79. Konus-Wind observation of GRB 080319B
  80. GRB 080319B: WSRT Radio Observations
  81. GRB 080320: SDSS source and Gemini-N observations
  82. GRB 080320: Enhanced Swift-XRT position
  83. GRB 080320: optical limit from IAC80
  84. GRB 080319B: second epoch imaging from Canarias (correction to GCN7469)
  85. GRB 080319C: KAIT OA observations
  86. GRB 080320 - SDSS Pre-Burst Observations
  87. GRB 080320: Swift detection of a burst
  88. GRB 080319B: optical observations
  89. GRB 080319C - SDSS Pre-Burst Observations
  90. GRB 080319A SDSS Pre-Burst Observations
  91. Swift-BAT trigger 306829 is IGR J16479-4514
  92. GRB080319B - SDSS Pre-Burst Observations
  93. GRB 080319B: RAPTOR observations of a naked eye burst
  94. GRB 080319A: Swift-XRT Team Refined Analysis
  95. GRB 080319B, Swift-BAT refined analysis
  96. GRB080319B: Prompt PROMPT Detections
  97. GRB 080319C: Swift-XRT Team Refined Analysis
  98. GRB 080319B: Swift-XRT Team Refined Analysis
  99. GRB 080319D: Swift/UVOT Refined Analysis of the Fading Optical Afterglow Candidate
  100. GRB 080319C: AGILE-MCAL observation of the prompt emission

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