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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. GRB101017A: MITSuME Okayama optical upper limits
  2. Konus-Wind observation of GRB 101017A
  3. GRB 101014A: Fermi LAT detection
  4. GRB 101017A: Swift-BAT refined analysis
  5. GRB 101017A: ROTSE-III Optical Limits
  6. GRB 101011A: Fermi GBM detection
  7. GRB 101011A: BOOTES-3 Upper Limit
  8. Konus-Wind observation of GRB 101014A
  9. GRB 101014A: Fermi GBM detection
  10. GRB 100906A: D50 optical detection
  11. GRB 100902A: D50 optical limit
  12. GRB 101011A, GROND upper limits
  13. GRB 101011A: Swift-BAT refined analysis
  14. GRB 101008A: Fermi GBM observation
  15. GRB 101008A: MASTER prompt optical observations (correction to GCN#11328)
  16. GRB 101008A: MASTER prompt optical observations
  17. GRB 101008A: Swift-BAT refined analysis
  18. GRB101008A, GROND detection of a fading afterglow
  19. GRB 101008A: Swift/XRT Detection of an Afterglow with no UVOT Counterpart
  20. GRB 101008A: Swift detection of a burst
  21. GRB 100924A: Suzaku WAM observation of the prompt emission
  22. GRB 100928A, Swift-BAT refined analysis
  23. GRB 100924A: Fermi GBM observation
  24. GRB100925A/MAXI J1659-152 MITSuME Ishigakijima and Okayama Optical Observation
  25. GRB 100925A / MAXI J1659-152: SARA-S Observations
  26. MAXI J1659-152: Swift-BAT refined analysis (triggers 434928 and 434931)
  27. GRB 100925A: Swift detection of a burst
  28. GRB 100924A: Swift-BAT refined analysis
  29. GRB 100924A: Swift detection of a burst
  30. GRB 100915A: TAROT Calern observatory optical observations
  31. GRB100906A: Ashra-1 observation of early optical emission
  32. GRB 100917A: Swift-BAT refined analysis
  33. GRB100915A: MITSuME Ishigakijima Optical upper limits
  34. GRB 100915B: Fermi GBM observation
  35. GRB 100915A: Correction to Swift-BAT refined analysis
  36. GRB 100915A: Swift-BAT refined analysis
  37. GRB 100915B: a long GRB detected by INTEGRAL
  38. GRB 100910A: Fermi GBM detection
  39. GRB100909A: MITSuME Ishigakijima Optical upper limits
  40. GRB 100909A: Swift-XRT refined analysis
  41. GRB 100909A: Faulkes Telescope North afterglow candidate
  42. GRB 100909A: ROTSE-III Optical Limits
  43. GRB 100909A: a long GRB detected by INTEGRAL
  44. GRB100906A: detection at 15GHz
  45. GRB100901A: IAO optical upper limits at 4 days after the burst
  46. GRB 100906A: GRAS-007 optical observations
  47. GRB100906A: R band observations
  48. Konus-Wind observation of GRB 100906A
  49. GRB100906A: Optical observations at IAO
  50. GRB 100906A: Fermi GBM observation
  51. GRB 100906A: Observations at the Virtual Telescope
  52. GRB 100906A: Swift-XRT refined analysis
  53. GRB100906A: Errata of MITSuME Okayama about observation time
  54. GRB100906A: MITSuME Okayama Optical Observation
  55. GRB 100901A: TLS observations, SDSS calibration, decay slope
  56. GRB 100906A: MASTER preliminary prompt+afterglow lc
  57. GRB 100906A: Swift-BAT refined analysis
  58. GRB 100906A: MASTER preliminary polarization prompt light curve
  59. GRB 100906A : Faulkes Telescope North optical observations
  60. GRB 100906A: MASTER early OT observations
  61. GRB 100906A: Swift detection of a burst with an optical afterglow
  62. GRB 100829A: MASTER optical observations
  63. GRB100905A: Optical upper limits at IAO
  64. GRB100905A: MITSuME Okayama optical upper limits
  65. GRB 100905A: Swift-BAT refined analysis
  66. GRB100904A: BOOTES-3 Upper Limit
  67. GRB 100905A: MASTER Prompt Optical Observations
  68. GRB 100905A: Faulkes Telescope North observations
  69. Optical observations of GRB 100901A
  70. GRB10901A: Murikabushi telescope observation at 3 days after the burst
  71. GRB 100904A: Swift-BAT refined analysis
  72. GRB100902A: Optical upper limits at IAO
  73. GRB10901A: Optical observations at IAO
  74. Konus-Wind observation of GRB 100829A
  75. GRB 100902A: Swift-BAT refined analysis
  76. GRB 100901A: Lightbuckets Optical Observations
  77. GRB 100902A: 1.5m OSN I-band Upper Limits
  78. Tentative redshift of GRB100902A from Swift-XRT data
  79. GRB 100902A: Swift XRT refined analysis
  80. GRB 100902A: optical observation at Mt.Terskol
  81. GRB 100901A: optical observation at Mt.Terskol
  82. GRB 100901A: Kanata Telescope observation of the optical afterglow
  83. GRB100901A: MITSuME Okayama Optical Observation at 1 day after the burst
  84. GRB 100901A: TLS Observations: Break?
  85. GRB 100902A: MASTER Prompt Optical Observations
  86. GRB 100902A: Faulkes Telescope South observations
  87. GRB 100902A: MASTER Optical Early Limit
  88. GRB 100902A: Swift detection of a burst
  89. GRB 100901A: MASTER optical flare at 420s discovery
  90. GRB 100901A: Vega telescope optical afterglow observation
  91. GRB100901A: MITSuME Okayama Optical Observation
  92. GRB 100901A: Swift-XRT Team refined analysis
  93. GRB 100901A - NOT optical observation
  94. GRB 100901A: Swift-BAT refined analysis
  95. GRB 100901A: optical observation at Mt.Terskol
  96. GRB 100901A: MASTER power low decay
  97. GRB 100901A: MASTER: the OT brightenning
  98. GRB 100901A: MASTER Optical Early Limits
  99. GRB 100901A: Faulkes Telescope North afterglow candidate
  100. Konus-Wind observation of GRB 100826A

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