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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"

24463 results found.

  1. GRB 110112B: A short GRB detected by INTEGRAL
  2. GRB 110112A: WHT candidate afterglow/host galaxy
  3. GRB 110112A: MASTER optical observations
  4. GRB 110112A: Swift-BAT refined analysis
  5. GRB 110106B: MASTER optical observations
  6. GRB110112A: TNT optical afterglow candidate
  7. GRB 110112A: Swift detection of a possible short burst
  8. GRB 110106B: early optical and near-IR observations
  9. GRB 110106B: MASTER early optical observations
  10. GRB 110107A: Swift-BAT refined analysis
  11. GRB 110107A detected in ground analysis of BAT slew data
  12. GRB 110106B: Fermi GBM detection
  13. Short GRB 110106A: MASTER OT observations
  14. GRB 110106A: TNG NIR observations
  15. GRB 110106B: Liverpool Telescope observations
  16. GRB 110106A: MITSuME Okayama optical upper limits
  17. GRB 110106B: WHT candidate afterglow
  18. GRB 110106B: Swift-BAT refined analysis
  19. GRB 110106A: Swift-XRT refined Analysis
  20. GRB110106B: Xinglong TNT upper limit
  21. GRB 110106A: Swift-BAT refined analysis
  22. GRB 110106B: Swift detection of a burst
  23. GRB 110106A: TNG optical observations and candidate counterparts
  24. GRB 110106A: MASTER optical observations
  25. GRB110106A: Xinglong TNT upper limit
  26. GRB 110106A: Swift detection of a burst
  27. GRB 101219B: After 2 weeks still detected by Swift/UVOT
  28. Konus-Wind observation of GRB 110102A
  29. GRB110102A: MITSuME Okayama Optical Observation
  30. GRB 110102A: Fermi GBM observation
  31. GRB 110102A: Swift-BAT refined analysis
  32. GRB 101225A: P60 Observations
  33. GRB 101225A: MAXI/GSC observations
  34. GRB 101225A Late-time emission observed by Swift-BAT
  35. GRB 101225A: WHT observations
  36. GRB 101225A, Swift-BAT refined analysis
  37. GRB 101225A (Swift trigger 441015): optical upper limit
  38. Trigger 441015: Swift detection of a possible burst or transient
  39. GRB 101224A: NOT optical observation
  40. GRB 101224A: Fermi GBM observation
  41. GRB101224A: MITSuME Okayama optical upper limits
  42. GRB 101224A, Swift-BAT refined analysis
  43. GRB 101219A: Chandra Observations
  44. GRB 101219A: MITSuME Ishigakijima Optical upper limits
  45. GRB 101219B: GROND Detection of the Optical/NIR Afterglow
  46. GRB 101219B: Fermi GBM observation
  47. GRB 101219B: Swift-BAT refined analysis
  48. Konus-Wind observation of short hard GRB 101219A
  49. GRB 101219A: Magellan NIR observations
  50. GRB 101219A: Further Gemini-South Imaging
  51. GRB 101219A: Swift-BAT refined analysis
  52. GRB 101219A - NOT observation - upper limit
  53. GRB 101219A: REM optical and NIR observations
  54. GRB 101219A: ROTSE-III Optical Limits
  55. GRB 101213A : Suzaku WAM observation of the prompt emission
  56. Redshift solution(s) for GRB101213A from Swift-XRT data
  57. Konus-Wind observation of GRB 101213A
  58. XRF 101117A, RIMOTS optical upper limits
  59. GRB 101213A: Fermi GBM observation
  60. GRB 101213A, Swift-BAT refined analysis
  61. GRB101204A GROND Detection of the Optical/NIR Afterglow
  62. GRB 101129A : Suzaku WAM observation of the prompt emission
  63. GRB 101204A Swift-XRT/UVOT afterglow candidate
  64. Konus-Wind observation of GRB 101130A
  65. Konus-Wind observation of GRB 101129A
  66. IPN Localization of GRB101130 (possible short duration burst)
  67. GRB 101201A: Fermi GBM observation
  68. GRB 101123A: ROTSE optical observations
  69. GRB 101123A: MASTER prompt optical observations
  70. Konus-Wind observation of GRB 101123A
  71. GRB 101123A: Fermi GBM detection
  72. Optical observation of GRB 101024A
  73. GRB 101112A: OSN and BTA observations
  74. XRF 101117A: Palomar Transient Factory Observations
  75. GRB 101117B: Swift-BAT refined analysis
  76. Fermi GBM detection of a burst from a galactic source
  77. GRB 101114A, Swift-BAT GRB detected by ground processing
  78. GRB 101112A: Fermi GBM detection
  79. GRB 10112A: MASTER optical observations
  80. Konus-Wind observation of GRB 101112A
  81. GRB 101112A: BOOTES-2/TELMA optical afterglow candidate
  82. GRB 101112A: a long GRB detected by INTEGRAL
  83. GRB 101030A: GROND optical/NIR afterglow candidate
  84. GRB 101030A: Swift-BAT refined analysis
  85. Konus-Wind observation of GRB 101023A
  86. GRB 101024A: GROND optical/NIR observations
  87. GRB 101024A: Zadko observatory - Gingin. Optical observations refined analysis
  88. GRB 101023A: miniTAO/ANIR NIR detection
  89. GRB 101024A: Fermi GBM observation
  90. GRB 101023A: Fermi GBM observation
  91. GRB 101024A: Swift-BAT refined analysis
  92. GGRB 101023A: GROND detection of the optical-NIR afterglow
  93. GRB 101023A: Swift-BAT refined analysis
  94. GRB 101011A: miniTAO/ANIR NIR upper limits
  95. GRB 101020A: MASTER prompt and afterglow limit
  96. GRB 101020A: BOOTES2 follow-up and limit
  97. GRB 101020A: MASTER polarization optical observations
  98. GRB 101020A, Swift-BAT refined analysis
  99. GRB 101020A: Swift detection of a burst
  100. GRB 101017A: miniTAO/ANIR NIR upper limits

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