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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"

5173 results found.

  1. GRB101224A: MITSuME Okayama optical upper limits
  2. GRB 101219B: Swift-XRT refined Analysis
  3. GRB 101219A: Swift-XRT refined Analysis
  4. GRB 101213A: Swift-XRT refined Analysis
  5. GRB 101213A: Swift detection of a burst
  6. GRB 101204A: Swift-XRT refined Analysis
  7. GRB 101201A: Swift-XRT refined Analysis
  8. Optical observation of GRB 101024A
  9. GRB 101117B: Swift-XRT refined analysis
  10. XRF101117A: MAXI/GSC detection of a short X-ray transient
  11. GRB 101112A - XRT source detection/analysis
  12. GRB 101112A: a long GRB detected by INTEGRAL
  13. GRB 101030A : Swift XRT refined analysis
  14. GRB 101024A: Swift XRT refined analysis
  15. GRB 101023A: miniTAO/ANIR NIR detection
  16. GRB 101024A: Fermi GBM observation
  17. GRB 101024A: GRAS06 optical observations
  18. GGRB 101023A: GROND detection of the optical-NIR afterglow
  19. GRB 101023A: Swift-XRT Team Refined Analysis
  20. GRB 101023A: Gemini discovery of optical afterglow
  21. GRB 101011A: XRT Refined Analysis
  22. GRB 101008A: Swift-XRT refined analysis
  23. GRB 100924A: Fermi GBM observation
  24. GRB 100925A / MAXI J1659-152: Optical observation with the Kottamia 188cm telescope
  25. GRB 100924A: GROND detection of an optical/NIR afterglow
  26. GRB 100915A: Swift-XRT refined analysis
  27. GRB 100909A: Swift-XRT refined analysis
  28. GRB 100901A: CrAO optical observations
  29. GRB 100906A: GRAS-007 optical observations
  30. GRB 100906A: Swift-XRT refined analysis
  31. GRB 100905A: Swift-XRT refined analysis.
  32. Optical observations of GRB 100901A
  33. GRB 100902A: UKIRT JK Observation
  34. GRB10901A: Optical observations at IAO
  35. GRB 100902A: Swift XRT refined analysis
  36. GRB 100901A: Kanata Telescope observation of the optical afterglow
  37. GRB 100901A: SARA-N observations
  38. GRB100901A: MITSuME Okayama Optical Observation
  39. GRB 100901A: Swift-XRT Team refined analysis
  40. GRB100823A : MOA optical observation
  41. GRB 100823A: VLT/X-Shooter spectroscopy
  42. GRB100816A Swift-XRT refined analysis
  43. GRB 100814A: Swift-XRT refined analysis
  44. GRB 100814A: CQUEAN r- and i-band Observation
  45. GRB 100805A: Swift-XRT Refined Analysis
  46. GRB 100802A: XRT refined analysis
  47. GRB 100728B: Swift-XRT Refined Analysis
  48. GRB 100728A: GROND Detection of the NIR Afterglow Candidate
  49. GRB 100728A: Swift-XRT refined analysis
  50. GRB 100728B: optical detection
  51. GRB 100728A: Swift detection of a burst
  52. GRB 100727A: Swift XRT refined analysis
  53. GRB 100727A: Fermi GBM observation
  54. GRB 100724B: gamma-ray detection by AGILE
  55. GRB 100725A: Swift XRT refined analysis
  56. GRB 100725B: Swift detection of a burst
  57. GRB 100724B: Fermi LAT and GBM analysis
  58. GRB 100724B: Fermi GBM detection
  59. GRB 100724A: Swift XRT refined analysis
  60. GRB 100724A: X-shooter redshift
  61. GRB 100724A, GROND detection of an afterglow candidate
  62. GRB 100707A: Fermi GBM detection
  63. Konus-Wind observation of GRB 100704A
  64. GRB 100704A: Swift XRT refined analysis
  65. GRB 100615A: Additional Gemini/NIRI observations
  66. GRB 100526A: Gemini/NIRI afterglow confirmation and host galaxy
  67. GRB 100702: ROTSE-III Optical Limits
  68. GRB 100702A: Swift detection of a short burst
  69. GRB 100628A: GROND optical/NIR observations of the host candidate
  70. GRB 100628A: Gemini North Observations
  71. Swift-BAT trigger 426048 is not a burst
  72. GRB 100625A: Swift-XRT Team refined analysis
  73. GRB 100621A: Swift XRT refined analysis
  74. GRB 100619A: Swift-XRT refind analysis
  75. XRF 100616a : MAXI/GSC detection of a probable XRF
  76. GRB 100615A: Swift-XRT refined analysis
  77. GRB 100614A: Swift-XRT refined analysis
  78. GRB 100615A: NTT/Ultracam imaging
  79. GRB 100614A: WHT I-band observations
  80. GRB 100606A Swift-XRT refined analysis
  81. Swift detection of outburst from the SFXT IGR J18410-0535
  82. GRB 100526A: Swift XRT refined analysis
  83. GRB 100522A: Swift XRT refined analysis
  84. GRB 100522A: Enhanced Swift-XRT position
  85. GRB 100522A: Swift detection of a burst
  86. GRB 100518A: Faulkes Telescope North Afterglow Candidate
  87. GRB 100517A: MASTER-Net wide field camera prompt optical observations
  88. GRB 100514A: Swift XRT refined analysis
  89. GRB 100513A: Swift XRT refined analysis
  90. GRB100504A: Optical upper limits at IAO
  91. GRB 100508A: Swift-XRT Refined analysis
  92. GRB 100504A: Swift-XRT refined analysis
  93. GRB 100504A: GROND Upper limits
  94. GRB 100420A: Gemini discovery of infrared afterglow
  95. GRB 100427A: Fermi GBM detection
  96. GRB 100418A: RTT150 optical observations
  97. GRB 100424A: CrAO optical observations
  98. GRB 100424A: Liverpool Telescope Upper Limits
  99. GRB 100425A: GROND afterglow observation
  100. GRB100424A: MITSuME optical upper limits

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