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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"

28233 results found.

  1. GRB 071227: Swift detection of a burst
  2. GRB 070429B: Possible UVOT Detection of an Optical Afterglow
  3. GRB 071125: Suzaku WAM observation of the prompt emission
  4. GRB 070429B: Probable host galaxy and redshift
  5. GRB 071129, Swift-BAT refined analysis
  6. GRB 071126: Enhanced Swift-XRT position
  7. GRB071122: Swift/UVOT Observations
  8. GRB071104: NIR Afterglow Candidate at TNG
  9. GRB 071122, Swift-BAT refined analysis
  10. GRB 071122 Swift-XRT refined analysis
  11. GRB 071122: P60 Optical Afterglow Candidate
  12. GRB 071122: Swift detection of a burst
  13. GRB 071118: P60 Observations
  14. GRB071118 MITSuME OAO optical observation
  15. GRB 071118: Observations from OSN
  16. GRB 071117: VLT observations and probable redshift
  17. Swift/UVOT observations of GRB071118
  18. Konus-Wind and Konus-A observations of GRB 071117
  19. Swift XRT follow-up observations of GRB071008
  20. Swift/UVOT upper limits for GRB 071117
  21. GRB071118: Swift XRT refined analysis
  22. GRB 071117: Gemini Optical Afterglow Discovery
  23. GRB 071118, Swift-BAT refined analysis
  24. GRB 071117: TAROT La Silla observatory optical observations
  25. GRB 071118: Swift detection of a burst
  26. GRB 071117: Gemini Observations
  27. GRB 071117: Swift-XRT refined analysis
  28. GRB 071117, Swift-BAT refined analysis
  29. Swift detection of MXB 0656-072
  30. GRB 071112C: Optical and NIR data observed with KANATA
  31. GRB 071112C MITSuME Akeno early optical observation
  32. GRB 071112C: SARA upper limit
  33. GRB 071112C : Second Epoch Lulin R-band observations
  34. GRB071112C MITSuME Okayama Optical Observation
  35. GRB 071112C: Swift-BAT refined analysis
  36. GRB 071112C: Swift XRT refined analysis
  37. Swift UVOT upper limits of GRB071112B
  38. GRB 071112B: Gemini Optical Imaging
  39. GRB 071112B: Swift-XRT preliminary analysis
  40. GRB 071112B, Swift-BAT partial refined analysis of the SHB
  41. GRB 071112C : Lulin R-band observation
  42. GRB 071112C: TAROT Calern observatory optical observations
  43. Swift XRT follow-up observations of GRB071028B
  44. GRB071112C Xinglong_TNT_and_EST_afterglow observations
  45. GRB 071112C: Optical and NIR afterglows observed with KANATA
  46. GRB 071112C: Swift detection of a burst with an optical counterpart
  47. GRB 071112B: Swift detection of a short hard burst
  48. GRB 071112: Swift detection of a possible burst
  49. Swift/UVOT initial analysis of GRB071109
  50. GRB 071109: further Swift-XRT analysis
  51. GRB 071109: TAROT Calern observatory optical observations
  52. GRB 071109: Swift-XRT possible X-ray counterpart
  53. GRB 071109: IBIS refined analysis
  54. GRB 071104: Swift-XRT Team Refined Analysis
  55. GRB 071104: Possible Swift UVOT Afterglow Candidate
  56. GRB 071104: Swift-XRT position
  57. GRB 071104: Gamma Ray Burst Localization by SuperAGILE
  58. Swift XRT and UVOT observations of GRB071028B
  59. GRB 071101, Swift-BAT refined analysis
  60. GRB 071101: Swift-XRT Team refined analysis
  61. GRB071101: Optical and NIR upper limits by KANATA
  62. GRB0711101: Two new source from Xinglong TNT observation
  63. GRB 071101: TAROT Calern observatory optical observations
  64. GRB071101 LOAO B,V,R,I observation
  65. GRB 071101: Swift detection of a burst
  66. GRB 071031, Swift-BAT refined analysis
  67. GRB 071031: Swift-XRT Team refined analysis
  68. GRB 071020: MITSuME Akeno optical observations
  69. GRB 071031: REM NIR and Optical observation
  70. GRB 071031: Swift detection of a burst with an optical counterpart
  71. GRB 071028B Swift-BAT detection of a burst
  72. GRB 071028: SARA observations of variable source
  73. Swift UVOT upper limits to GRB071028
  74. GRB071028: Xinglong EST V-band upper limit
  75. GRB 071028: Swift-XRT Team refined analysis
  76. GRB 071028, Swift-BAT refined analysis
  77. GRB 071028: Swift detection of a burst
  78. GRB 071003: Infrared Photometry with Keck Adaptive Optics
  79. GRB071021: MARGE Optical Limits
  80. GRB071020, optical upper limit
  81. GRB 071025: SARA VRI upper limits
  82. Swift UVOT upper limits
  83. GRB071025: Xinglong TNT I-band upper limit
  84. GRB 071025: Swift-XRT Team refined analysis
  85. GRB 060602A: host redshift
  86. GRB 071025, Swift-BAT refined analysis
  87. GRB071021 : CFHT Ks-band observation
  88. GRB 071025: ROTSE-III Refined Analysis
  89. GRB 071025a: PAIRITEL observations
  90. GRB 071025: ROTSE-III Detection of Optical Counterpart
  91. GRB 071025: Swift detection of a burst
  92. GRB 071021: R-band detection and analysis
  93. Possible radio detection of GRB 071021 with the VLA
  94. GRB 071021: (Relatively shallow) IR non-detections; motivation for optical spectroscopy
  95. GRB 071020: SARA observations
  96. Radio detection of GRB 071020 with the VLA
  97. GRB071021: MITSuME Okayama Optical Upper Limits
  98. GRB 071021: Z-band detection
  99. GRB 071021: optical and NIR observations
  100. GRB 071021: possible high-z burst

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