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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"

28234 results found.

  1. GRB 080701A, Swift-BAT refined analysis
  2. Trigger 315630: Swift detection of a possible burst
  3. GRB 080701: Swift-XRT Prompt Analysis
  4. GRB 080701: Swift detection of a burst
  5. GRB 080623: Suzaku WAM observation of the prompt emission
  6. GRB 080625: Further observations from OSN
  7. GRB 080625:Swift-XRT detection of the afterglow
  8. GRB 080625: Swift/UVOT Detection of an Optical Afterglow
  9. GRB 080625: Observations at OSN
  10. GRB 080625: Gamma Ray Burst Localization by SuperAGILE
  11. GRB 080623: GROND upper limits
  12. GRB 080623: Swift-XRT refined analysis
  13. GRB 080623, Swift-BAT refined analysis
  14. GRB 080623: Enhanced Swift-XRT position
  15. GRB 080623: TAROT La Silla observatory optical observations
  16. GRB 080623: Swift XRT prompt analysis
  17. Swift trigger 314975 is not a GRB
  18. GRB080607: optical observation
  19. GRB 070809: Putative host galaxy and redshift
  20. VLA upper limit on INTEGRAL burst GRB 080613A
  21. GRB080613B: MITSuME upper limits
  22. GRB080613A: Optical upper limits with Okayama MITSuME telescope
  23. GRB 080603A: optical observations on June 04
  24. GRB 080613A: Swift-XRT detection of the afterglow
  25. GRB 080613A: GROND Confirmation of the Afterglow Candidate
  26. GRB 080613B: GROND Upper Limits
  27. GRB 080613B - NOT optical and IR nondetections
  28. GRB 080613B, Swift-BAT refined analysis
  29. GRB 080613B: Swift-XRT refined analysis
  30. GRB 080514B: Spectroscopic constraints and probable host galaxy
  31. GRB 080613B: Swift detection of a burst
  32. GRB 080613: Faulkes Telescope North optical candidate
  33. GRB 080613 : a long GRB detected with INTEGRAL
  34. GRB 080603A: Late-time Keck imaging and spectroscopy
  35. GRB 080603b: optical observation
  36. GRB 080603A: final Swift-XRT observations.
  37. GRB 080607: AGILE-MCAL observation of the prompt emission
  38. GRB 080603B - TLS 2nd Epoch: Another Break
  39. GRB 080605: TLS 3rd Epoch - Source Confusion
  40. GRB080605: optical observation with the MITSuME-OAO telescope
  41. GRB080607: RTT150 optical observations
  42. GRB 080603A: optical observations
  43. GRB 080607: Swift-XRT refined analysis
  44. Swift/UVOT Observations of GRB080607
  45. VLA detection of INTEGRAL burst GRB 080603A
  46. GRB 080607: Enhanced Swift-XRT position
  47. GRB 080607, Swift-BAT refined analysis
  48. GRB 080605: GROND 2nd epoch observations
  49. GRB 080607: Keck/LRIS spectroscopy and redshift
  50. GRB 080607: Swift detection of a burst with optical afterglow
  51. GRB 080607: ROTSE-III Detection of Optical Counterpart
  52. GRB 080605: Swift-UVOT refined analysis
  53. Possible VLA radio detection on INTEGRAL burst GRB 080603A
  54. GRB 080604: VLA radio upper limit
  55. GRB 080605, Swift-BAT refined analysis
  56. GRB 080603B: VLA radio upper limit
  57. GRB 080605, Swift-BAT refined analysis
  58. GRB 080605: Swift-XRT refined analysis
  59. GRB 080605: MASTER VWF 46 s AT observation
  60. GRB 080605: Enhanced Swift-XRT position
  61. GRB 080605: GROND detection of the optical afterglow candidate
  62. GRB 080605: Liverpool Telescope optical afterglow candidate
  63. GRB 080605: Swift/UVOT Position of the Optical Afterglow
  64. GRB 080605: Swift detection of a burst with an optical afterglow
  65. GRB 080603B: TLS Afterglow Observation
  66. GRB 080603A: TLS Afterglow Observation
  67. GRB 080604: MITSuME Okayama observation
  68. GRB 080604, Swift-BAT refined analysis
  69. GRB 080604: Swift-XRT refined analysis
  70. GRB 080603B : Liverpool Telescope Observations
  71. Konus-Wind observation of GRB 080603B
  72. GRB 080603B: Swift-XRT refined analysis
  73. GRB 080603A: Swift-XRT detection of the afterglow
  74. GRB 080430: optical observations
  75. GRB 080603B: Swift/UVOT detection of the afterglow
  76. GRB 080604: Enhanced Swift-XRT position
  77. GRB 080603B, Swift-BAT refined analysis
  78. GRB080603B: RTT150 optical observations, break in light curves
  79. GRB 080604: Swift detection of a burst with an optical afterglow
  80. GRB 080603B: TAROT Calern observatory confirmation of slow optical decay
  81. GRB 080516: TAROT La Silla observatory optical observations
  82. GRB080603B: NOT redshift
  83. GRB 080603B: BOOTES2/TELMA optical observations
  84. GRB 080603B: TAROT Calern observatory detection of a plateau in the light curve
  85. GRB 080603B: Swift detection of a burst with optical afterglow
  86. GRB 080603B: ROTSE-III Detection of Optical Counterpart
  87. GRB 080603: A long GRB detected by INTEGRAL
  88. Possible GRB080603: Faulkes Telescope North optical afterglow candidate
  89. SGR 1627-41: Chandra/RXTE/Swift Observations Scheduled
  90. GRB 080602, Swift-BAT refined analysis
  91. GRB 080602: Swift-XRT refined analysis
  92. Konus-Wind observation of GRB 080602
  93. GRB 080602: NOT R-band upper limit
  94. GRB 080602: Enhanced Swift-XRT position
  95. GRB 080602: Swift detection of a burst
  96. Swift analysis of BAT Slew Survey event (Trigger=009)
  97. GRB 080523: afterglow confirmation and redshift constraints
  98. Konus-Wind observation of reactivation of SGR 1627-41
  99. GRB 080524: Swift XRT and UVOT analysis
  100. GRB 080503: 2nd Epoch Chandra X-ray Observations

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