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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"

43862 results found.

  1. GRB 111228A, Swift-BAT refined analysis
  2. GRB 111228A: optical observations
  3. GRB 111228A: Enhanced Swift-XRT position
  4. GRB 111228A: TAROT Calern observatory. OT decay stopped
  5. GRB 111228A, optical observations
  6. GRB 111228A: Fermi GBM observation
  7. GRB 111228A: TAROT Calern observatory. OT seems still bright
  8. GRB 111228A: Possible host galaxy in the SDSS arhive
  9. GRB 111225A, optical observations
  10. XMM-Newton observation of the short GRB 111020A
  11. GRB 111228A: Xinglong TNT confirms the optical afterglow
  12. GRB 111228A: Swift detection of a burst with an optical counterpart
  13. GRB 111205A: optical observations
  14. GRB 111225A: Swift/UVOT Observations
  15. GRB 111215A: Keck/LRIS Imaging
  16. GRB 111225A: Keck/LRIS Afterglow Photometry
  17. GRB 111222A : Suzaku WAM observation of the prompt emission
  18. GRB 111225A: PAIRITEL NIR Upper Limits
  19. GRB 111225A: GRT Optical Observation
  20. GRB 111225A: 1.23m CAHA optical observations
  21. GRB 111225A: Swift-XRT refined Analysis
  22. GRB 111225A, Swift-BAT refined analysis
  23. GRBv111225A: Xinglong TNT optical afterglow
  24. GRB 111225A: Enhanced Swift-XRT position
  25. GRB 111225A: Super-LOTIS early detection
  26. GRB 111225A: TAROT Calern observatory optical detection
  27. GRB 111225A: TAROT Calern observatory optical observations
  28. GRB 111225A: Swift detection of a burst with an optical counterpart
  29. GRB111222A: GMG optical observation
  30. GRB 111222A: Swift/UVOT Observations
  31. GRB 111222A: Swift-XRT observations
  32. Konus-Wind observation of GRB 111222A
  33. IPN Triangulation of GRB 111222A (short/hard/intense)
  34. GRB 111210A: optical upper limit of Mt. Terskol observatory
  35. Trigger 510075 is not a GRB
  36. GRB 111215A: EVLA observations
  37. GRB111215A: CARMA Detection
  38. XRT GRB Catalogue now live and online
  39. GRB 111103B: optical upper limit
  40. GRB 110820A: optical observations in Maidanak observatory
  41. GRB 111103A: optical upper limit of Mt. Terskol observatory
  42. GRB 111215B: Suzaku WAM observation of the prompt emission
  43. GRB 111211A: optical ovservations at Mt. Terskol observatory
  44. GRB111215A: optical upper limit
  45. Konus-Wind observation of GRB 111215B
  46. GRB 111215B: Swift-XRT observations
  47. GRB 111205A: Confirmation of X-ray Afterglow
  48. IPN Triangulation of GRB 111215B (long/intense)
  49. GRB111215A: Pre-Outburst Palomar 48 inch Imaging
  50. GRB 111215A: WHT, LT and NOT imaging
  51. GRB 111215A: TNG K-band observations
  52. GRB 111215A: Swift-XRT refined Analysis
  53. Possible detection of pre-trigger X-ray emission from GRB 111215A by MAXI/GSC
  54. GRB 111215A: Enhanced Swift-XRT position
  55. GRB 111215A: Swift-BAT refined analysis
  56. GRB 111215A: OSN I-band observations
  57. GRB 111215A: MASTER-Net optical prompt and follow up observations
  58. GRB 111215A, Optical Observations
  59. GRB 111215A: MITSuME Akeno Optical upper limits
  60. GRB 111209A: RAPTOR Limits Before and During the Gamma-ray Emitting Interval
  61. GRB 111215A: GMG optical upper limit
  62. GRB 111215A : Xinglong TNT upper limit
  63. GRB 111215A: Swift detection of a burst
  64. GRB 111201A, the review of the sky area in plate archive
  65. GRB 111212A: GROND observations
  66. GRB 111211A: VLT/X-shooter redshift
  67. Konus-Wind observation of GRB 111211A
  68. GRB 111211A: NOT afterglow confirmation
  69. GRB 111212A: Swift-XRT refined Analysis
  70. GRB 111211A: Swift/XRT target of opportunity observation
  71. GRB 111212A: Swift/UVOT Upper Limits
  72. GRB 111212A: Swift-BAT refined analysis
  73. GRB 111212A: Enhanced Swift-XRT position
  74. GRB 111212A: Swift-XRT observations
  75. GRB 111211A: GROND afterglow candidate
  76. GRB 111212A: Swift detection of a burst
  77. GRB 111211A: SuperAGILE localization of a long GRB
  78. GRB 111210A: Xinglong TNT upper limit
  79. GRB 111209A - ATCA 34GHz upper limit
  80. Konus-Wind observation of GRB 111209A
  81. GRB 111210A: GROND observations
  82. GRB 111210A: SDSS prior imaging
  83. GRB 111210A: Swift-XRT refined Analysis
  84. GRB 111208A: Swift-XRT refined analysis
  85. GRB 111210A: Gemini-North candidate counterpart
  86. GRB 111209A: Rebrightening seen by GROND
  87. GRB111210A: MITSuME Okayama J-band upper-limit
  88. GRB 111210A: Enhanced Swift-XRT position
  89. GRB 111210A: Swift-BAT refined analysis
  90. GRB 111210A: Swift detection of a burst
  91. GRB 111209A: IRTF NIR Imaging/Spectroscopy
  92. GRB 111209A: VLT/X-shooter redshift
  93. GRB 111209A: GROND Afterglow observations
  94. GRB 111209A optical limit by "Pi of the Sky"
  95. GRB 111209A: PROMPT optical observations of early afterglow
  96. GRB 111208A: Lightbuckets Optical Observations
  97. GRB 111209A: Swift-XRT refined Analysis
  98. GRB 111209A: Swift UVOT refined analysis
  99. GRB 111209A: Swift Burst of Interest
  100. GRB 111209A, Swift-BAT refined analysis

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