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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"

28124 results found.

  1. GRB060213: Swift XRT observations and possible afterglow candidate
  2. GRB 060213: IPN localization
  3. GRB060211B: REM optical and NIR observations
  4. GRB 060211A: Further refined analysis of the Swift burst
  5. GRB 060210: ARC NIR Detection of Afterglow and Possible Host Galaxy
  6. GRB 060211b: P60 Observations
  7. GRB 060211A: Partial refined analysis on the Swift-BAT burst
  8. GRB 050826: Optical Afterglow and Host Galaxy
  9. GRB 060210: Further refined analysis of the Swift-BAT burst
  10. GRB 060211B: Swift/BAT refined analysis
  11. GRB060210: Swift/UVOT Upper Limits
  12. GRB 060211B: Swift-XRT Team refined analysis
  13. GRB 060210: Optical Observations
  14. GRB 060211: Swift detection of a long burst
  15. GRB 060210: Refined analysis of the Swift-BAT burst
  16. GRB060210: Swift XRT Refined Analysis
  17. GRB 060210 : Xinglong and Lulin optical limit
  18. GRB 060210: optical evolution
  19. GRB 060210: Swift detection of a burst
  20. GRB060210: Optical afterglow
  21. GRB 060209 : TAROT optical observation
  22. GRB 060203: Swift/UVOT upper limits
  23. GRB 060121 : WIDGET Pre-trigger limit
  24. GRB060204a: Swift XRT Source is not GRB Afterglow
  25. GRB 060206: optical observations at Asiago
  26. GRB 060206: IR Detection of the Afterglow
  27. GRB 060206: Super-LOTIS observations
  28. GRB060204A: Swift/UVOT observations
  29. GRB 060206: Swift-BAT refined analysis
  30. GRB060206: SDSS Pre-Burst Observations
  31. GRB060206 - Swift UVOT Confirmation of Optical Afterglow
  32. GRB060206: Swift-BAT detection of a burst
  33. GRB 060204C: XRT analysis of Swift J061223.0+701243.9
  34. GRB060204C: optical observation
  35. GRB 060204A: Swift XRT upper limit
  36. GRB 060204A: FRAM optical observations
  37. GRB060204B: Swift/UVOT refined analysis
  38. GRB 060204C: optical observations
  39. Swift XRT Observation of GRB 060204C
  40. GRB 060204B: Swift-BAT refined analysis
  41. GRB 060204B: ART early limit
  42. GRB 060204b: Keck/LRIS Afterglow Confirmation
  43. GRB 060204C: Liverpool Telescopes optical limit
  44. GRB 060204C: Swift-BAT detection of a burst
  45. GRB 060204A: further INTEGRAL results
  46. GRB060204B, optical observation
  47. GRB060204B - SDSS pre-burst observations
  48. GRB 060203: Swift-BAT refined analysis
  49. GRB 060204B: Swift detection of a burst
  50. GRB 060202: UKIRT/WFCAM K-band and KeckI/LRIS I-band Observation
  51. GRB 060203: RTT150 optical observations
  52. GRB 060203: IR Counterpart
  53. Possible GRB 060203: optical observations at Asiago
  54. GRB 060202: PROMPT Observations
  55. GRB 060202: GETS observation
  56. GRB 060202: Gemini-N J, H, K_s observations
  57. GRB 060202: Near-IR Observation with UKIRT/WFCAM
  58. GRB 060202: Optical Afterglow Candidate from Keck/LRIS
  59. GRB 060202: Refined analysis of the Swift-BAT burst
  60. GRB060202, optical observation
  61. GRB 060202: Swift/UVOT upper limits
  62. GRB 060121: Gemini Late-time Observations
  63. GRB 060130: PROMPT Observations
  64. GRB060130: Further R-band imaging
  65. GRB 060130: Swift/XRT observation
  66. GRB 060123: Gemini spectroscopy of the putative host galaxy
  67. GRB060130: Optical imaging
  68. GRB060130: REM infrared observations
  69. GRB 060130, SMARTS optical observations
  70. GRB 060130: FRAM optical observations
  71. GRB 060130: further INTEGRAL IBIS results
  72. GRB 060121: Confirmation of NIR Afterglow
  73. GRB 060123: Swift refined analysis of an unusual GRB
  74. GRB060124, BVRcIc field calibration
  75. GRB 060121: Probable Detection of NIR Afterglow
  76. GRB 060116 HST observations
  77. GRB 060124: HETE detection and spectrum of the main peak
  78. GRB060124: detailed XRT analysis
  79. GRB 060124: ART optical limits during the burst
  80. GRB060123: Optical and IR Imaging
  81. GRB 060123: P200 Observations
  82. GRB 060124: XRT refined analysis
  83. GRB 060124: R band Observations
  84. GRB 060124 : Optical observation at Xinglong and Kiso
  85. GRB060124: optical observations at Asiago
  86. GRB060123: SDSS pre-burst observations
  87. GRB 060116: Further analysis of VLT photometry and optical spectroscopy
  88. GRB 060121: OHP optical limits
  89. GRB 060124: TAROT optical limits
  90. GRB060124, optical observation
  91. GRB 060124: Optical Observations at Tautenburg
  92. GRB 060117: Suzaku WAM observation of the prompt emission
  93. GRB 060111B: Suzaku WAM observation of the prompt emission
  94. GRB 060124: Swift-BAT detection of a burst
  95. GRB 060121: Liverpool Telescopes optical limits
  96. GRB 060121: Swift XRT refined analysis
  97. Konus-Wind observation of GRB 060121
  98. GRB 060121: candidate optical counterpart
  99. GRB 060121: Infrared Observations
  100. GRB 060121: optical observations

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