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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"

26538 results found.

  1. GRB 080325: optical upper limit
  2. GRB 080328: GAO 150cm telescope Optical Observation
  3. GRB080330: Improved Swift XRT Position
  4. GRB 080319B: TORTORA light curve (Correction)
  5. GRB080330: Swift XRT refined analysis
  6. GRB 080330, SMARTS optical/IR afterglow observations
  7. GRB 080330 Swift-UVOT refined analysis
  8. GRB 080328: Suzaku WAM observation of the prompt emission
  9. GRB 080330, Swift-BAT refined analysis
  10. Konus-Wind observation of GRB 080328
  11. GRB 080330: Redshift Confirmation from Hobby-Eberly Telescope Spectroscopy
  12. GRB080330: LOAO R-band Detection
  13. GRB 080330: GROND Observations
  14. GRB 080330: TAROT Calern observatory optical observations
  15. GRB080330 - SDSS Pre-Burst Observations
  16. GRB 080330: Swift detection of a burst with an optical counterpart
  17. GRB 080330: TAROT Calern observatory optical detection
  18. GRB 080319B: Continued Gemini-South followup and possible host galaxy
  19. GRB 080328: BTA optical imaging and spectroscopy
  20. GRB 080328, Swift-BAT refined analysis
  21. GRB 080328: Swift XRT refined analysis
  22. GRB 080325, Swift-BAT refined analysis
  23. GRB080325 - I and z-band Imaging
  24. GRB080319B, BVRcIc field calibration
  25. GRB 080328: Enhanced Swift-XRT position
  26. GRB080328: Faulkes Telescope North observations
  27. GRB 080328: Swift detection of a burst with an optical counterpart
  28. GRB 080325: Subaru detection of NIR afterglow candidate
  29. GRB080325: XRT Refined Analysis
  30. GRB 080325: GROND Observations
  31. GRB 080325: Early observations from OSN
  32. GRB 080325: Enhanced Swift-XRT position
  33. GRB 080325: Swift detection of a burst
  34. GRB 080319B : Apparent spectral evolution in very early Swift/XRT WT mode data: intrinsic or pile-up effect?
  35. GRB 080319C: Suzaku WAM observation of the prompt emission
  36. Radio Detection of GRB 080319B
  37. GRB 080320, Swift-BAT refined analysis
  38. GRB 080319D: GROND Observations
  39. GRB 080319B: TORTORA light curve
  40. GRB 080319B: optical upper limit
  41. GRB 080319D: optical upper limit
  42. GRB080319B: Time-Independent XRT Spectrum
  43. GRB 080319D, Swift-BAT refined analysis
  44. GRB 080320: Swift XRT refined analysis
  45. GRB 080319D: Swift XRT refined analysis
  46. GRB 080320: optical limit
  47. GRB 080320: Gemini-N optical afterglow
  48. Konus-Wind observation of GRB 080319C
  49. GRB 080319B optical observations
  50. GRB 080319C, Swift-BAT refined analysis
  51. Konus-Wind observation of GRB 080319B
  52. GRB 080320: Enhanced Swift-XRT position
  53. GRB 080319C: Early RAPTOR Observations
  54. GRB 080319B: second epoch imaging from Canarias (correction to GCN7469)
  55. GRB 080320 - SDSS Pre-Burst Observations
  56. GRB 080320: Swift detection of a burst
  57. GRB 080319B : Lulin observation of temporal break at 0.2 days
  58. GRB 080319B: optical observations
  59. GRB 080319C - SDSS Pre-Burst Observations
  60. GRB 080319A SDSS Pre-Burst Observations
  61. GRB080319B - SDSS Pre-Burst Observations
  62. GRB 080319B: RAPTOR observations of a naked eye burst
  63. GRB 080319A: Swift-XRT Team Refined Analysis
  64. GRB 080319B, Swift-BAT refined analysis
  65. GRB 080319C: Swift-XRT Team Refined Analysis
  66. GRB 080319B: Swift-XRT Team Refined Analysis
  67. GRB 080319C: AGILE-MCAL observation of the prompt emission
  68. GRB 080319B: Hobby-Eberly Telescope Spectroscopy
  69. GRB 080319D: Swift detection of a burst with a possible optical afterglow
  70. GRB 080319B: TORTORA synchronous observation
  71. GRB 080319A/B/C: INTEGRAL SPI-ACS light curves available
  72. GRB 080319B: Enhanced Swift-XRT position
  73. GRB 080319A: Enhanced Swift-XRT position
  74. GRB 080319A, Swift-BAT refined analysis
  75. GRB 080319B: REM early data
  76. GRB 080319b light curve by Pi-of-the-Sky
  77. GRB 080319C: Early Super-LOTIS Observations
  78. GRB 080319C: Swift detection of a burst with an optical afterglow
  79. GRB 080319A: REM observations
  80. GRB 080319b prompt optical observation by Pi-of-the-Sky
  81. GRB 080319A: optical observations at the NOT
  82. GRB0 080319B : LOAO optical observation
  83. GRB 080319B: Swift detection of an intense burst with a bright optical counterpart
  84. GRB 080319A: Swift detection of a burst
  85. GRB080310, LBT and MDM photometry
  86. Swift/UVOT observations of GRB 080315
  87. Swift trigger 306323: Swift-BAT/XRT refined analysis
  88. GRB 080315: TAROT Calern observatory optical observations
  89. GRB 080315: Swift detection of a possible burst
  90. GRB080310 : Lulin Optical observations
  91. GRB 080310: GAO 150cm telescope Optical Observation
  92. GRB080310 : Optical observations by LOAO and Lulin
  93. GRB 080310: ROTSE-III Observations of Optical Counterpart
  94. GRB080310: Optical observation by MITSuME telescope
  95. GRB 080307: GAO 150cm telescope Optical Observation
  96. GRB 080229A: GAO 150cm telescope Optical Observation
  97. GRB 080310: PAIRITEL detection and PAIRITEL+KAIT+UVOT SED
  98. GRB 080310: early RAPTOR multicolor observations
  99. GRB 080310, Swift-BAT refined analysis
  100. GRB 080310: Swift-XRT refined analysis

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