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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"

20418 results found.

  1. GRB 080516: Swift detection of a burst
  2. Errartum: VLA upper limit on GRB 080507
  3. VLA upper limit on GRB 080705
  4. IPN triangulation of bright GRB 080513
  5. GRB 080514B: KPNO 4m IR observations
  6. GRB 080514B: slow fading behaviour ?
  7. GRB 080514B: Swift-XRT analysis
  8. GRB 080514B, GROND observations
  9. GRB 080515: Swift detection of a burst
  10. GRB 080514B: Watcher observations
  11. GRB 080514B: SuperAGILE/IPN GRB Localization
  12. procesure for GRB Circular
  13. Swift detection of a possible galactic transient
  14. GRB080514: REM NIR & Optical Observations
  15. GRB 080506: NAYUTA Optical Observation
  16. GRB 080507: Swift XRT analysis confirms the X-ray afterglow
  17. GRB 080507: Keck photometry
  18. GRB 080503: Chandra Observation of X-ray Rebrightening or Flattening
  19. GRB 080507: Optical Afterglow
  20. GRB 080506:Optical observations from HCT
  21. GRB 080506: VLA radio upper limit
  22. GRB080506: Swift/UVOT observations
  23. GRB 080506, Swift-BAT refined analysis
  24. GRB080503, RIMOTS optical upper limit
  25. GRB 080506: Observations from NOT
  26. GRB 080506: TLS afterglow detection in VRIZ
  27. GRB 080506: Enhanced Swift-XRT position
  28. GRB 080506: Swift detection of a burst with optical afterglow
  29. GRB 080503: VLA radio upper limit
  30. GRB 080503: Observations from NOT
  31. GRB 080430: TLS imaging one day after the GRB
  32. GRB 080503, Swift-BAT lag and time-resolved spectral analysis
  33. GRB080503 XRT refined analysis
  34. GRB 080503, Swift-BAT refined analysis
  35. GRB 080430
  36. GRB 080503: Enhanced Swift-XRT position
  37. GRB 080503: New candidate afterglow/host in Gemini imaging
  38. GRB 080503: Swift detection of a short burst
  39. GRB080430: Swift/UVOT observations
  40. VLA radio upper limit on GRB 080430
  41. GRB 080430: Enhanced Swift-XRT position
  42. GRB 080430 - SDSS Pre-Burst Observations
  43. GRB 080430: Swift detection of a burst with optical afterglow
  44. GRB 080430: TAROT Calern observatory optical observations
  45. GRB080426: Swift/UVOT upper limits
  46. GRB 080426: Enhanced Swift-XRT position
  47. GRB 080426: Swift detection of a possibly short burst
  48. Possible GRB 080315: XRT non-detection of afterglow
  49. GRB 080320 : Faulkes Telescope North Observations
  50. GRB 080319A : Liverpool and Faulkes Telescopes Observations
  51. GRB 080420A: ROTSE-III Optical Limits on a possible short burst
  52. GRB080310, BVRcIc field calibration
  53. Swift XRT and UVOT observations of GRB080414
  54. GRB 080413B: Faulkes Telescope South optical afterglow observations
  55. GRB 080413A: Liverpool Telescope and Faulkes Telescope South optical observations
  56. GRB 080414: RTT150 optical observations
  57. VLA radio observations of GRB 080413B
  58. VLA radio observations of GRB 080413A
  59. GRB080413B
  60. Swift-BAT spectral lag analysis of GRB 080413B
  61. GRB 080413a, SMARTS optical/IR afterglow observations
  62. GRB 080413B: Swift XRT refined analysis
  63. GRB080413A: Swift/UVOT observations
  64. GRB080413B: REM NIR & Optical Observation
  65. GRB 080413B: GROND detection of afterglow in all bands
  66. GRB 080413B: Swift detection of a possibly short burst with optical counterpart
  67. GRB 080413A: REM detection of the NIR Afterglow
  68. GRB 080413: Enhanced Swift-XRT position
  69. GRB 080413: TAROT Calern observatory optical observations
  70. GRB 080413: Swift detection of a burst with an optical afterglow
  71. GRB 080411: Swift/UVOT refined analysis
  72. GRB 080411: Swift-XRT Refined Analysis
  73. GRB 080411: Enhanced Swift-XRT position
  74. GRB 080411: GROND detection of optical afterglow candidate
  75. GRB 080411: Swift detection of a bright burst
  76. GRB 080408: GROND detection of optical/NIR afterglow candidate
  77. GRB 080330 optical observations
  78. Swift/UVOT observations of GRB080409
  79. GRB 080409: Swift XRT refined analysis
  80. GRB 080409: Enhanced Swift-XRT position
  81. GRB 080409: REM optical/NIR observations
  82. GRB 080409: Swift detection of a burst
  83. GRB 080319A: Early RAPTOR optical limits
  84. GRB 080319B: HST observations
  85. GRB 080405: Swift-BAT refined analysis
  86. GRB 080405: Swift-XRT position
  87. GRB 080405: Mars Oddysey and Swift-BAT detection, possible host galaxy
  88. GRB 080325: optical upper limit
  89. GRB 080328: GAO 150cm telescope Optical Observation
  90. GRB080330: Improved Swift XRT Position
  91. GRB080328, RIMOTS optical upper limit
  92. GRB 080330: REM optical observations
  93. GRB 080330 Swift-UVOT refined analysis
  94. GRB080330: TNT optical observations
  95. GRB 080330: GROND Observations
  96. GRB 080330A: PAIRITEL Infrared Detections
  97. GRB 080330: error in reported XRT position
  98. GRB080330 - SDSS Pre-Burst Observations
  99. GRB 080330: Swift detection of a burst with an optical counterpart
  100. GRB 080330: TAROT Calern observatory optical detection

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