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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"

14854 results found.

  1. GRB 080623: Swift detection of a burst
  2. GRB 070809: Putative host galaxy and redshift
  3. GRB 080613A: Swift-XRT detection of the afterglow
  4. GRB080613A: Swift/UVOT Upper Limits
  5. GRB 080613B: Swift detection of a burst
  6. Swift observations of BAT Slew Survey event (Trigger=010)
  7. GRB 080603A: final Swift-XRT observations.
  8. GRB 080607: AGILE-MCAL observation of the prompt emission
  9. GRB 080605: TLS 3rd Epoch - Source Confusion
  10. VLA detection of INTEGRAL burst GRB 080603A
  11. GRB 080607 - PAIRITEL NIR detection
  12. GRB 080607: Swift detection of a burst with optical afterglow
  13. GRB 080607: ROTSE-III Detection of Optical Counterpart
  14. Possible VLA radio detection on INTEGRAL burst GRB 080603A
  15. GRB 080605: GROND detection of the optical afterglow candidate
  16. GRB 080605: Swift detection of a burst with an optical afterglow
  17. GRB 080603B: PAIRITEL infrared detection
  18. GRB 080603A: PAIRITEL infrared detection
  19. GRB080604: HET redshift retraction
  20. GRB 080603A: Swift-XRT detection of the afterglow
  21. GRB 080603B: Swift/UVOT detection of the afterglow
  22. GRB 080603A: Swift/UVOT detection of the afterglow
  23. GRB080604: confirmation of optical afterglow
  24. GRB 080604: Swift detection of a burst with an optical afterglow
  25. GRB080603B: NOT redshift
  26. GRB 080603B: TAROT Calern observatory detection of a plateau in the light curve
  27. GRB 080603B: Swift detection of a burst with optical afterglow
  28. GRB080603: Super-LOTIS detection of Optical Counterpart
  29. GRB 080603B: ROTSE-III Detection of Optical Counterpart
  30. GRB 080603: Gemini-North redshift
  31. GRB 080602: Swift detection of a burst
  32. Reactivation of SGR 1627-41
  33. GRB 080524: Swift-BAT detection of a burst in ground analysis
  34. GRB 080520: VLT host detection
  35. GRB 080523: VLT optical observations
  36. GRB 080523: Swift detection of a burst
  37. GRB 080515: KPNO 4m NIR afterglow detection
  38. GRB080521(?): detection of possible burst from BAT slew data and XRT ToO
  39. GRB 080514B: pseudo-z= 1.8 from prompt emission spectrum
  40. GRB 080514B: UVOT Observations
  41. GRB 080520: Swift detection of a burst with optical afterglow
  42. GRB 080517: Swift detection of a burst
  43. GRB 080514B: NOT observations
  44. GRB 080516: Swift detection of a burst
  45. GRB 080515: Swift detection of a burst
  46. GRB 080514B: possible AGILE detection at E>50 MeV
  47. Swift detection of a possible galactic transient
  48. GRB 080507: E Pur Si Muove!
  49. GRB 080503: Chandra Observation of X-ray Rebrightening or Flattening
  50. GRB 080503: Hubble Space Telescope Imaging
  51. GRB 080507: GRB localization by SuperAGILE
  52. GRB 080506: TLS 2nd Epoch - possible light curve break
  53. GRB 080506: TLS afterglow detection in VRIZ
  54. GRB 080506: Swift detection of a burst with optical afterglow
  55. GRB 080503: Late-time Optical rebrightening (possible mini-SN)
  56. GRB 080503: Optical afterglow candidate and LRIS spectroscopy of the short burst
  57. GRB 080503: Swift detection of a short burst
  58. GRB080430: Swift/UVOT observations
  59. GRB 080430 - multicolor observations of the afterglow
  60. GRB 080430 optical observations
  61. GRB 080430: Swift detection of a burst with optical afterglow
  62. GRB 080426: Swift detection of a possibly short burst
  63. Possible GRB 080315: XRT non-detection of afterglow
  64. GRB 080420?: Swift detection of a possible short burst
  65. GRB 080413B: VLT redshift
  66. GRB 080413B: GROND detection of afterglow in all bands
  67. GRB 080413B: Swift detection of a possibly short burst with optical counterpart
  68. GRB 080413A: REM detection of the NIR Afterglow
  69. GRB 080413: Swift detection of a burst with an optical afterglow
  70. GRB 080413: ROTSE-III Detection of Optical Counterpart
  71. GRB 080411: GROND detection of optical afterglow candidate
  72. GRB 080411: Swift detection of a bright burst
  73. GRB 080408: GROND detection of optical/NIR afterglow candidate
  74. GRB 080408: Swift-XRT position of a possible afterglow
  75. GRB 080409: Swift detection of a burst
  76. GRB 080330: RAPTOR detection of prompt optical flash
  77. GRB 080319B: Potential Jet Break Observed by Swift-XRT and UVOT
  78. GRB 080405: Mars Oddysey and Swift-BAT detection, possible host galaxy
  79. GRB080330: LOAO R-band Detection
  80. GRB 080330: TAROT Calern observatory optical observations
  81. GRB 080330A: ROTSE-III Detection of Optical Counterpart
  82. GRB 080330: Swift detection of a burst with an optical counterpart
  83. GRB 080330: TAROT Calern observatory optical detection
  84. GRB 080319B: Continued Gemini-South followup and possible host galaxy
  85. GRB 080328: BTA optical imaging and spectroscopy
  86. GRB080328: Faulkes Telescope North observations
  87. GRB 080328: Swift detection of a burst with an optical counterpart
  88. GRB 080325: Subaru detection of NIR afterglow candidate
  89. GRB 080325: NIR afterglow candidate
  90. GRB 080319D: GROND Detection of the Optical Counterpart
  91. GRB 080325: Swift detection of a burst
  92. GRB 080319B: Second & Third Epoch WSRT Radio Observations
  93. Radio Detection of GRB 080319B
  94. GRB 080319B - CARMA mm Observations
  95. GRB 080320: J detection with FLAMINGOS
  96. GRB 080319B: Allen Telescope Array Observations
  97. GRB 080319B optical observations
  98. GRB 080320: Swift detection of a burst
  99. GRB 080319C: AGILE-MCAL observation of the prompt emission
  100. GRB 080319D: Swift detection of a burst with a possible optical afterglow

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