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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"

23704 results found.

  1. GRB110112A: TNT optical afterglow candidate
  2. GRB 110112A: Swift detection of a possible short burst
  3. GRB 110106B: early optical and near-IR observations
  4. GRB 110106B: MASTER early optical observations
  5. GRB 110107A: Swift-BAT refined analysis
  6. Short GRB 110106A: MASTER OT observations
  7. GRB 110106A: TNG NIR observations
  8. GRB 110106B: Liverpool Telescope observations
  9. GRB 110106A: MITSuME Okayama optical upper limits
  10. GRB 110106B: Swift-BAT refined analysis
  11. GRB 110106A: TNG redshift of the closeby galaxy
  12. GRB 110106A: Swift-BAT refined analysis
  13. GRB 110106A: Enhanced Swift-XRT position
  14. GRB 110106B: Swift detection of a burst
  15. GRB 110106A: TNG optical observations and candidate counterparts
  16. GRB 110106A: MASTER optical observations
  17. GRB 110106A: Swift detection of a burst
  18. Konus-Wind observation of GRB 110102A
  19. GRB110102A: Swift/UVOT observations
  20. GRB110102A: MITSuME Okayama Optical Observation
  21. GRB 110102A: Swift-BAT refined analysis
  22. GRB 110102A: Swift detection of a burst with an optical detection
  23. GRB 101225A: optical break from NOT observation
  24. GRB 101225A: MMT spectroscopy
  25. GRB 101225A: MAXI/GSC observations
  26. GRB 101225A Late-time emission observed by Swift-BAT
  27. GRB 101225A, Swift-BAT refined analysis
  28. GRB 101225A: Swift/UVOT Detection
  29. Trigger 441015 / GRB 101225A: Further NOT optical observation
  30. GRB 101225A (Swift trigger 441015): optical upper limit
  31. Trigger 441015: Swift detection of a possible burst or transient
  32. GRB101224A: MITSuME Okayama optical upper limits
  33. GRB 101224A, Swift-BAT refined analysis
  34. GRB 101224A: Swift detection of a short burst
  35. GRB 101219A: MITSuME Ishigakijima Optical upper limits
  36. GRB 101219B: GROND Detection of the Optical/NIR Afterglow
  37. GRB 101219B: Fermi GBM observation
  38. GRB 101219A: IAC80 optical observations
  39. GRB 101219B: Swift-BAT refined analysis
  40. GRB 101219B: Swift detection of a burst with an optical afterglow
  41. GRB 101219A: GROND Upper limits
  42. Konus-Wind observation of short hard GRB 101219A
  43. GRB 101219A: Magellan NIR observations
  44. GRB 101219A: Further Gemini-South Imaging
  45. GRB 101219A: Swift-BAT refined analysis
  46. GRB 101219A: ROTSE-III Optical Limits
  47. GRB 101219A: Swift detection of a short hard burst
  48. GRB 101213A : Suzaku WAM observation of the prompt emission
  49. Konus-Wind observation of GRB 101213A
  50. XRF 101117A, RIMOTS optical upper limits
  51. GRB 101213A, Swift-BAT refined analysis
  52. GRB 101213A: Swift detection of a burst
  53. GRB101204A GROND Detection of the Optical/NIR Afterglow
  54. GRB 101129A : Suzaku WAM observation of the prompt emission
  55. Konus-Wind observation of GRB 101130A
  56. GRB 101204A detected in ground analysis of BAT data
  57. Konus-Wind observation of GRB 101129A
  58. IPN Localization of GRB101130 (possible short duration burst)
  59. GRB 101129A SHB found by IPN and in ground analysis of BAT data
  60. GRB101030A
  61. GRB 101201A: Swift-XRT refined Analysis
  62. GRB 101201A: Swift/UVOT Detection
  63. GRB 101201A: GROND Detection of the Optical/NIR Afterglow
  64. GRB 101201A detected in ground analysis of BAT data
  65. Swift detection of MAXIJ1409-619
  66. GRB 101123A: MASTER prompt optical observations
  67. Konus-Wind observation of GRB 101123A
  68. IPN triangulation of bright GRB 101123A
  69. GRB 101123A: Fermi GBM detection
  70. GRB 101117B: GROND Upper limits
  71. GRB 101112A: OSN and BTA observations
  72. XRF 101117A: Palomar Transient Factory Observations
  73. GRB 101117B: Swift-BAT refined analysis
  74. GRB 101117B: Swift detection of a burst
  75. XRF101117A: MAXI/GSC detection of a short X-ray transient
  76. GRB 101114A: GROND Upper limits
  77. Konus-Wind observation of GRB 101114A
  78. GRB 101114A, Swift-BAT GRB detected by ground processing
  79. GRB 101112A: Fermi GBM detection
  80. GRB 101112A: optical observations
  81. GRB 10112A: MASTER optical observations
  82. Konus-Wind observation of GRB 101112A
  83. GRB 101112A: BOOTES-2/TELMA optical afterglow candidate
  84. GRB101112A: Liverpool Telescope Afterglow Candidate
  85. GRB 101112A: a long GRB detected by INTEGRAL
  86. GRB 100906A: optical observations
  87. GRB 101030A: Swift-BAT refined analysis
  88. GRB 101030A: Swift detection of a burst
  89. GRB 090111, the review of the sky area in plate archives (1976-1996)
  90. Konus-Wind observation of GRB 101023A
  91. GRB 101024A: GROND optical/NIR observations
  92. GRB 101024A: Zadko observatory - Gingin. Optical observations refined analysis
  93. GRB 101024A: Swift XRT refined analysis
  94. GRB 101024A: Zadko observatory - Gingin. Optical observations
  95. GRB101024A: Swift/UVOT
  96. GRB 101024A: Swift-BAT refined analysis
  97. Swift/UVOT observations of GRB101023A
  98. GRB 101024A: Swift detection of a burst with an optical afterglow
  99. GGRB 101023A: GROND detection of the optical-NIR afterglow
  100. GRB 101023A: Swift-BAT refined analysis

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