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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"

26543 results found.

  1. Swift/UVOT observations of GRB060306
  2. GRB 060306: Swift-BAT refined analysis
  3. GRB 060306: Swift-XRT team refined analysis
  4. GRB 060306: Swift detection of a bright burst
  5. GRB060223b: optical limit
  6. GRB 060121: HST observations
  7. GRB 060223b: Swift/UVOT Upper Limits
  8. GRB 060218/SN 2006aj: K-380 optical observations
  9. GRB 060218/SN 2006aj, SMARTS optical/IR observations
  10. GRB 060223B: Swift XRT possible afterglow
  11. GRB 060218/SN 2006aj: REM optical and near-infrared observations
  12. GRB 060218 : Radio upper limits from GMRT
  13. GRB 060223A:Xinglong optical limits
  14. GRB 060223a: Swift/UVOT refined analysis
  15. GRB 060223: Swift XRT Team preliminary analysis
  16. GRB 060218/SN 2006aj: Swift-BAT fluence and peak flux
  17. GRB 060223B: Swift detection of a bright burst
  18. GRB 060223: Swift-BAT refined analysis
  19. GRB 060223: Swift/UVOT Confirmation of Optical Afterglow
  20. Spectral properties of GRB060218/SN2006aj
  21. GRB 060219: Swift-BAT refined analysis
  22. GRB 060218: Decline in r-band flux
  23. GRB060218: UV Detection and Light Curves
  24. GRB060219: SARA Observations
  25. GRB 060219: Swift/UVOT Upper Limits
  26. GRB 060219: Swift-XRT Team refined analysis
  27. GRB 051221B: Swift-XRT Team Refined Analysis
  28. GRB 060219: Partial refined analysis of the Swift-BAT burst
  29. GRB060218: Radio Afterglow Discovery
  30. GRB 060218: optical/nIR observations at La Palma
  31. GRB060219: SDSS pre-burst observations
  32. GRB 060219: Swift-BAT detection of a weak burst
  33. Oddball GRB 060218, transient or GRB?
  34. GRB060218: Swift/XRT Team preliminary analysis of the possible burst
  35. GRB 060218: Pre-burst detection of a possible host galaxy
  36. GRB 060211B: Swift/UVOT Upper Limits
  37. GRB060218 : SDSS pre-burst observations
  38. GRB 060213: optical afterglow not confirmed
  39. Swift UVOT observations of GRB060213
  40. GRB 060211B: Skynet Observations
  41. GRB 060213: optical afterglow candidate
  42. GRB060213: Swift XRT observations and possible afterglow candidate
  43. GRB060213: MASTER final result
  44. GRB060213:_MASTER_optical_observation
  45. Konus-Wind observation of bright hard GRB 060213
  46. GRB 060213: IPN localization
  47. GRB060211B: REM optical and NIR observations
  48. GRB 060210: ARC NIR Detection of Afterglow and Possible Host Galaxy
  49. GRB 060211b: P60 Observations
  50. GRB060210: Swift/UVOT Upper Limits
  51. GRB 060211B: Swift-XRT Team refined analysis
  52. GRB 060210: Optical Observations
  53. GRB 060211A: Swift XRT Team Refined Analysis
  54. GRB060211: Faulkes North observation
  55. GRB 060211: Swift detection of a long burst
  56. GRB060210: Swift XRT Refined Analysis
  57. GRB060206, optical observations
  58. GRB060210:Faulkes Telescope North Afterglow Confirmation
  59. GRB 060210: Swift detection of a burst
  60. GRB060210: Optical afterglow
  61. GRB060209: RTT150 optical observations
  62. GRB 060209 : TAROT optical observation
  63. GRB 060203: Swift/UVOT upper limits
  64. GRB 060121 : WIDGET Pre-trigger limit
  65. GRB060204a: Swift XRT Source is not GRB Afterglow
  66. GRB 060206: IR Detection of the Afterglow
  67. GRB060204A: Swift/UVOT observations
  68. GRB 060206: Swift-BAT refined analysis
  69. GRB060206: SDSS Pre-Burst Observations
  70. GRB060206: Liverpool Telescope observation
  71. GRB060204a: Swift XRT Detection of an Afterglow Candidate
  72. GRB060206 - Swift UVOT Confirmation of Optical Afterglow
  73. GRB060206: Swift-BAT detection of a burst
  74. GRB 060204C: XRT analysis of Swift J061223.0+701243.9
  75. GRB060204C: optical observation
  76. GRB 060204A: Swift XRT upper limit
  77. GRB 060204A: FRAM optical observations
  78. GRB060204B: Swift/UVOT refined analysis
  79. GRB 060204C: optical observations
  80. Swift XRT Observation of GRB 060204C
  81. GRB 060204B: ART early limit
  82. GRB060204B: Swift XRT Team Refined Analysis
  83. GRB 060204b: Keck/LRIS Afterglow Confirmation
  84. GRB 060204C: Liverpool Telescopes optical limit
  85. GRB 060204C: Swift-BAT detection of a burst
  86. GRB060204B: Faulkes OT candidate
  87. GRB060204B, optical observation
  88. GRB060204B - SDSS pre-burst observations
  89. GRB 060204B: Swift detection of a burst
  90. GRB 060202: UKIRT/WFCAM K-band and KeckI/LRIS I-band Observation
  91. GRB 060203: RTT150 optical observations
  92. Swift-BAT trigger is GRB 060203
  93. GRB 060203: IR Counterpart
  94. GRB 060203: P60 Confirmation of Optical Afterglow
  95. Possible GRB 060203: optical observations at Asiago
  96. GRB 060202: PROMPT Observations
  97. Swift-BAT trigger 180151 is unknown origin at this time
  98. GRB 060202: Gemini-N J, H, K_s observations
  99. GRB 060202: Near-IR Observation with UKIRT/WFCAM
  100. GRB 060202: Optical Afterglow Candidate from Keck/LRIS

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