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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"

24437 results found.

  1. GRB 101219B: After 2 weeks still detected by Swift/UVOT
  2. Konus-Wind observation of GRB 110102A
  3. GRB110102A: MITSuME Okayama Optical Observation
  4. GRB 110102A: Fermi GBM observation
  5. GRB 110102A: Swift-BAT refined analysis
  6. GRB 101225A: P60 Observations
  7. GRB 101225A: MAXI/GSC observations
  8. GRB 101225A Late-time emission observed by Swift-BAT
  9. GRB 101225A: WHT observations
  10. GRB 101225A, Swift-BAT refined analysis
  11. GRB 101225A (Swift trigger 441015): optical upper limit
  12. Trigger 441015: Swift detection of a possible burst or transient
  13. GRB 101224A: NOT optical observation
  14. GRB 101224A: Fermi GBM observation
  15. GRB101224A: MITSuME Okayama optical upper limits
  16. GRB 101224A, Swift-BAT refined analysis
  17. GRB 101219A: Chandra Observations
  18. GRB 101219A: MITSuME Ishigakijima Optical upper limits
  19. GRB 101219B: GROND Detection of the Optical/NIR Afterglow
  20. GRB 101219B: Fermi GBM observation
  21. GRB 101219B: Swift-BAT refined analysis
  22. Konus-Wind observation of short hard GRB 101219A
  23. GRB 101219A: Magellan NIR observations
  24. GRB 101219A: Further Gemini-South Imaging
  25. GRB 101219A: Swift-BAT refined analysis
  26. GRB 101219A - NOT observation - upper limit
  27. GRB 101219A: REM optical and NIR observations
  28. GRB 101219A: ROTSE-III Optical Limits
  29. GRB 101213A : Suzaku WAM observation of the prompt emission
  30. Redshift solution(s) for GRB101213A from Swift-XRT data
  31. Konus-Wind observation of GRB 101213A
  32. XRF 101117A, RIMOTS optical upper limits
  33. GRB 101213A: Fermi GBM observation
  34. GRB 101213A, Swift-BAT refined analysis
  35. GRB101204A GROND Detection of the Optical/NIR Afterglow
  36. GRB 101129A : Suzaku WAM observation of the prompt emission
  37. GRB 101204A Swift-XRT/UVOT afterglow candidate
  38. Konus-Wind observation of GRB 101130A
  39. Konus-Wind observation of GRB 101129A
  40. IPN Localization of GRB101130 (possible short duration burst)
  41. GRB 101201A: Fermi GBM observation
  42. GRB 101123A: ROTSE optical observations
  43. GRB 101123A: MASTER prompt optical observations
  44. Konus-Wind observation of GRB 101123A
  45. GRB 101123A: Fermi GBM detection
  46. Optical observation of GRB 101024A
  47. GRB 101112A: OSN and BTA observations
  48. XRF 101117A: Palomar Transient Factory Observations
  49. GRB 101117B: Swift-BAT refined analysis
  50. Fermi GBM detection of a burst from a galactic source
  51. GRB 101114A, Swift-BAT GRB detected by ground processing
  52. GRB 101112A: Fermi GBM detection
  53. GRB 10112A: MASTER optical observations
  54. Konus-Wind observation of GRB 101112A
  55. GRB 101112A: BOOTES-2/TELMA optical afterglow candidate
  56. GRB 101112A: a long GRB detected by INTEGRAL
  57. GRB 101030A: GROND optical/NIR afterglow candidate
  58. GRB 101030A: Swift-BAT refined analysis
  59. Konus-Wind observation of GRB 101023A
  60. GRB 101024A: GROND optical/NIR observations
  61. GRB 101024A: Zadko observatory - Gingin. Optical observations refined analysis
  62. GRB 101023A: miniTAO/ANIR NIR detection
  63. GRB 101024A: Fermi GBM observation
  64. GRB 101023A: Fermi GBM observation
  65. GRB 101024A: Swift-BAT refined analysis
  66. GGRB 101023A: GROND detection of the optical-NIR afterglow
  67. GRB 101023A: Swift-BAT refined analysis
  68. GRB 101011A: miniTAO/ANIR NIR upper limits
  69. GRB 101020A: MASTER prompt and afterglow limit
  70. GRB 101020A: BOOTES2 follow-up and limit
  71. GRB 101020A: MASTER polarization optical observations
  72. GRB 101020A, Swift-BAT refined analysis
  73. GRB 101020A: Swift detection of a burst
  74. GRB 101017A: miniTAO/ANIR NIR upper limits
  75. GRB101017A: MITSuME Okayama optical upper limits
  76. Konus-Wind observation of GRB 101017A
  77. GRB 101014A: Fermi LAT detection
  78. GRB 101017A: Swift-BAT refined analysis
  79. GRB 101017A: ROTSE-III Optical Limits
  80. GRB 101011A: Fermi GBM detection
  81. GRB 101011A: BOOTES-3 Upper Limit
  82. Konus-Wind observation of GRB 101014A
  83. GRB 101014A: Fermi GBM detection
  84. GRB 100906A: D50 optical detection
  85. GRB 100902A: D50 optical limit
  86. GRB 101011A, GROND upper limits
  87. GRB 101011A: Swift-BAT refined analysis
  88. GRB 101008A: Fermi GBM observation
  89. GRB 101008A: MASTER prompt optical observations (correction to GCN#11328)
  90. GRB 101008A: MASTER prompt optical observations
  91. GRB 101008A: Swift-BAT refined analysis
  92. GRB101008A, GROND detection of a fading afterglow
  93. GRB 101008A: Swift/XRT Detection of an Afterglow with no UVOT Counterpart
  94. GRB 101008A: Swift detection of a burst
  95. GRB 100924A: Suzaku WAM observation of the prompt emission
  96. GRB 100928A, Swift-BAT refined analysis
  97. GRB 100924A: Fermi GBM observation
  98. GRB100925A/MAXI J1659-152 MITSuME Ishigakijima and Okayama Optical Observation
  99. GRB 100925A / MAXI J1659-152: SARA-S Observations
  100. MAXI J1659-152: Swift-BAT refined analysis (triggers 434928 and 434931)

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