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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"

5182 results found.

  1. Short GRB 110112B : early optical limit by "Pi of the Sky"
  2. GRB 110112B: Fermi GBM observation
  3. GRB 110112B: A short GRB detected by INTEGRAL
  4. GRB 110112A: MASTER optical observations
  5. GRB 110106B: MASTER optical observations
  6. GRB 110112A: Swift detection of a possible short burst
  7. GRB 110106B: Swift-XRT refined Analysis
  8. GRB 101225A: Swift-XRT refined Analysis
  9. GRB 101224A: Fermi GBM observation
  10. GRB101224A: MITSuME Okayama optical upper limits
  11. GRB 101219B: Swift-XRT refined Analysis
  12. GRB 101219A: Swift-XRT refined Analysis
  13. GRB 101213A: Swift-XRT refined Analysis
  14. GRB 101213A: Swift detection of a burst
  15. GRB 101204A: Swift-XRT refined Analysis
  16. GRB 101201A: Swift-XRT refined Analysis
  17. Optical observation of GRB 101024A
  18. GRB 101117B: Swift-XRT refined analysis
  19. XRF101117A: MAXI/GSC detection of a short X-ray transient
  20. GRB 101112A - XRT source detection/analysis
  21. GRB 101112A: a long GRB detected by INTEGRAL
  22. GRB 101030A : Swift XRT refined analysis
  23. GRB 101024A: Swift XRT refined analysis
  24. GRB 101023A: miniTAO/ANIR NIR detection
  25. GRB 101024A: Fermi GBM observation
  26. GRB 101024A: GRAS06 optical observations
  27. GGRB 101023A: GROND detection of the optical-NIR afterglow
  28. GRB 101023A: Swift-XRT Team Refined Analysis
  29. GRB 101023A: Gemini discovery of optical afterglow
  30. GRB 101011A: XRT Refined Analysis
  31. GRB 101008A: Swift-XRT refined analysis
  32. GRB 100924A: Fermi GBM observation
  33. GRB 100925A / MAXI J1659-152: Optical observation with the Kottamia 188cm telescope
  34. GRB 100924A: GROND detection of an optical/NIR afterglow
  35. GRB 100915A: Swift-XRT refined analysis
  36. GRB 100909A: Swift-XRT refined analysis
  37. GRB 100901A: CrAO optical observations
  38. GRB 100906A: GRAS-007 optical observations
  39. GRB 100906A: Swift-XRT refined analysis
  40. GRB 100905A: Swift-XRT refined analysis.
  41. Optical observations of GRB 100901A
  42. GRB 100902A: UKIRT JK Observation
  43. GRB10901A: Optical observations at IAO
  44. GRB 100902A: Swift XRT refined analysis
  45. GRB 100901A: Kanata Telescope observation of the optical afterglow
  46. GRB 100901A: SARA-N observations
  47. GRB100901A: MITSuME Okayama Optical Observation
  48. GRB 100901A: Swift-XRT Team refined analysis
  49. GRB100823A : MOA optical observation
  50. GRB 100823A: VLT/X-Shooter spectroscopy
  51. GRB100816A Swift-XRT refined analysis
  52. GRB 100814A: Swift-XRT refined analysis
  53. GRB 100814A: CQUEAN r- and i-band Observation
  54. GRB 100805A: Swift-XRT Refined Analysis
  55. GRB 100802A: XRT refined analysis
  56. GRB 100728B: Swift-XRT Refined Analysis
  57. GRB 100728A: GROND Detection of the NIR Afterglow Candidate
  58. GRB 100728A: Swift-XRT refined analysis
  59. GRB 100728B: optical detection
  60. GRB 100728A: Swift detection of a burst
  61. GRB 100727A: Swift XRT refined analysis
  62. GRB 100727A: Fermi GBM observation
  63. GRB 100724B: gamma-ray detection by AGILE
  64. GRB 100725A: Swift XRT refined analysis
  65. GRB 100725B: Swift detection of a burst
  66. GRB 100724B: Fermi LAT and GBM analysis
  67. GRB 100724B: Fermi GBM detection
  68. GRB 100724A: Swift XRT refined analysis
  69. GRB 100724A: X-shooter redshift
  70. GRB 100724A, GROND detection of an afterglow candidate
  71. GRB 100707A: Fermi GBM detection
  72. Konus-Wind observation of GRB 100704A
  73. GRB 100704A: Swift XRT refined analysis
  74. GRB 100615A: Additional Gemini/NIRI observations
  75. GRB 100526A: Gemini/NIRI afterglow confirmation and host galaxy
  76. GRB 100702: ROTSE-III Optical Limits
  77. GRB 100702A: Swift detection of a short burst
  78. GRB 100628A: GROND optical/NIR observations of the host candidate
  79. GRB 100628A: Gemini North Observations
  80. Swift-BAT trigger 426048 is not a burst
  81. GRB 100625A: Swift-XRT Team refined analysis
  82. GRB 100621A: Swift XRT refined analysis
  83. GRB 100619A: Swift-XRT refind analysis
  84. XRF 100616a : MAXI/GSC detection of a probable XRF
  85. GRB 100615A: Swift-XRT refined analysis
  86. GRB 100614A: Swift-XRT refined analysis
  87. GRB 100615A: NTT/Ultracam imaging
  88. GRB 100614A: WHT I-band observations
  89. GRB 100606A Swift-XRT refined analysis
  90. Swift detection of outburst from the SFXT IGR J18410-0535
  91. GRB 100526A: Swift XRT refined analysis
  92. GRB 100522A: Swift XRT refined analysis
  93. GRB 100522A: Enhanced Swift-XRT position
  94. GRB 100522A: Swift detection of a burst
  95. GRB 100518A: Faulkes Telescope North Afterglow Candidate
  96. GRB 100517A: MASTER-Net wide field camera prompt optical observations
  97. GRB 100514A: Swift XRT refined analysis
  98. GRB 100513A: Swift XRT refined analysis
  99. GRB100504A: Optical upper limits at IAO
  100. GRB 100508A: Swift-XRT Refined analysis

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