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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. 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').
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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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

28081 results found.

  1. GRB 060204C: Swift-BAT detection of a burst
  2. GRB 060204A: further INTEGRAL results
  3. GRB060204B, optical observation
  4. GRB060204B - SDSS pre-burst observations
  5. GRB 060203: Swift-BAT refined analysis
  6. GRB 060204B: Swift detection of a burst
  7. GRB 060202: UKIRT/WFCAM K-band and KeckI/LRIS I-band Observation
  8. GRB 060203: RTT150 optical observations
  9. GRB 060203: IR Counterpart
  10. Possible GRB 060203: optical observations at Asiago
  11. GRB 060202: PROMPT Observations
  12. GRB 060202: GETS observation
  13. GRB 060202: Gemini-N J, H, K_s observations
  14. GRB 060202: Near-IR Observation with UKIRT/WFCAM
  15. GRB 060202: Optical Afterglow Candidate from Keck/LRIS
  16. GRB 060202: Refined analysis of the Swift-BAT burst
  17. GRB060202, optical observation
  18. GRB 060202: Swift/UVOT upper limits
  19. GRB 060121: Gemini Late-time Observations
  20. GRB 060130: PROMPT Observations
  21. GRB060130: Further R-band imaging
  22. GRB 060130: Swift/XRT observation
  23. GRB 060123: Gemini spectroscopy of the putative host galaxy
  24. GRB060130: Optical imaging
  25. GRB060130: REM infrared observations
  26. GRB 060130, SMARTS optical observations
  27. GRB 060130: FRAM optical observations
  28. GRB 060130: further INTEGRAL IBIS results
  29. GRB 060121: Confirmation of NIR Afterglow
  30. GRB 060123: Swift refined analysis of an unusual GRB
  31. GRB060124, BVRcIc field calibration
  32. GRB 060121: Probable Detection of NIR Afterglow
  33. GRB 060116 HST observations
  34. GRB 060124: HETE detection and spectrum of the main peak
  35. GRB060124: detailed XRT analysis
  36. GRB 060124: ART optical limits during the burst
  37. GRB060123: Optical and IR Imaging
  38. GRB 060123: P200 Observations
  39. GRB 060124: XRT refined analysis
  40. GRB 060124: R band Observations
  41. GRB 060124 : Optical observation at Xinglong and Kiso
  42. GRB060124: optical observations at Asiago
  43. GRB060123: SDSS pre-burst observations
  44. GRB 060116: Further analysis of VLT photometry and optical spectroscopy
  45. GRB 060121: OHP optical limits
  46. GRB 060124: TAROT optical limits
  47. GRB060124, optical observation
  48. GRB 060124: Optical Observations at Tautenburg
  49. GRB 060117: Suzaku WAM observation of the prompt emission
  50. GRB 060111B: Suzaku WAM observation of the prompt emission
  51. GRB 060124: Swift-BAT detection of a burst
  52. GRB 060121: Liverpool Telescopes optical limits
  53. GRB 060121: Swift XRT refined analysis
  54. Konus-Wind observation of GRB 060121
  55. GRB 060121: candidate optical counterpart
  56. GRB 060121: Infrared Observations
  57. GRB 060121: optical observations
  58. GRB 060121: Optical imaging
  59. GRB060121 - SDSS pre-burst observations
  60. HETE Alert 4006: MASTER promt optical limit
  61. GRB060117 - ATCA 3/6cm radio limits - correction
  62. GRB060117 - ATCA 3/6cm radio limits
  63. GRB 060116: photometric redshift - the farthest GRB?
  64. Konus-Wind observation of GRB 060117
  65. GRB 060116: UKIRT IR Observations
  66. GRB 060117: Refined analysis of the Swift-BAT burst
  67. GRB 060117: FRAM optical afterglow candidate
  68. GRB 060117: nearby galaxy
  69. GRB 060116: VLT optical observations
  70. GRB 060116: Refined analysis of the Swift-BAT burst
  71. GRB 060116: XRT refined analysis
  72. GRB 060116: IR Candidate Afterglow
  73. GRB 060116: Swift/UVOT upper limits
  74. GRB060115: REM observations
  75. GRB 060110: XRT position and analysis
  76. GRB 060116 : Lulin optical limit
  77. GRB060116: Faulkes North observation
  78. GRB 060116: Swift-BAT detection of a burst
  79. GRB 060115: Refined analysis of the Swift-BAT burst
  80. GRB 060115: Swift/UVOT upper limits
  81. GRB 060114: REM observations
  82. GRB 060115: Swift XRT refined analysis
  83. GRB 060114: Swift/UVOT Observations
  84. GRB060115, optical observation
  85. GRB 060115: MITSuME optical afterglow candidate
  86. GRB 060115: Swift detection of a burst
  87. GRB060114, optical observation
  88. GRB060114: Faulkes North observation
  89. GRB 060108: IR observations of afterglow
  90. GRB 060108: Evidence for an XRT Position Offset
  91. GRB 060110: KAIT observations
  92. GRB 060111B: Swift XRT refined analysis
  93. GRB 060111B: MITSuME detection of optical afterglow
  94. GRB 060111B: TAROT optical observation
  95. GRB060111A: RTT150 optical observations
  96. GRB060111B: RTT150, possible host galaxy
  97. GRB 060111B: Refined analysis of the Swift-BAT burst
  98. GRB 060111(a): P60 Observations
  99. GRB 060111B: Gualba observatory limit
  100. GRB 060111B: Swift detection of a burst

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