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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"

37563 results found.

  1. GRB 100915B: Fermi GBM observation
  2. GRB 100915A: Correction to Swift-BAT refined analysis
  3. GRB 100915A: Swift/UVOT Upper Limits
  4. GRB 100915A: Swift-BAT refined analysis
  5. GRB 100915A: Swift-XRT refined analysis
  6. GRB 100915A: Enhanced Swift-XRT position
  7. GRB 100915B: a long GRB detected by INTEGRAL
  8. GRB 100915A: Swift detection of a likely burst
  9. GRB 100910A: Fermi GBM detection
  10. Swift-BAT trigger 433953 is not a burst
  11. Swift BAT Trigger 433953 probably not a GRB
  12. GRB100909A: MITSuME Ishigakijima Optical upper limits
  13. GRB 100909A: Swift/UVOT observations
  14. GRB 100901A: errata of GRB name in GCN 11270
  15. GRB 100901A: optical observations in Mondy and R-light curve
  16. GRB 100909A: Swift-XRT refined analysis
  17. GRB 100906A: optical observations at Mt.Terskol
  18. GRB 100901A: optical observation in Maidanak, break confirmation
  19. GRB 100909A: Faulkes Telescope North afterglow candidate
  20. GRB 100909A: ROTSE-III Optical Limits
  21. GRB 100909A: Planned XMM-Newton observation
  22. GRB 100902A : Confirmation of afterglow and re-brightening with CFHT r’-band imaging
  23. GRB 100909A: Swift target of opportunity observation
  24. GRB 100909A: a long GRB detected by INTEGRAL
  25. GRB100906A: detection at 15GHz
  26. GRB100901A: IAO optical upper limits at 4 days after the burst
  27. EVLA detection of radio afterglow of GRB100901A
  28. GRB 100901A: Confirmation of WSRT Radio Detection
  29. GRB 100901A: CrAO optical observations
  30. GRB 100906A: RTT150 optical observations
  31. GRB 100906A: GRAS-007 optical observations
  32. GRB100906A: R band observations
  33. Konus-Wind observation of GRB 100906A
  34. GRB100906A: non-detection at 15GHz
  35. GRB100906A: Optical observations at IAO
  36. GRB 100906A: Fermi GBM observation
  37. GRB 100906A: TLS Monitoring
  38. GRB 100901A: TLS Detection at 5.5 days
  39. GRB 100906A: Observations at the Virtual Telescope
  40. GRB 100906A: Swift-XRT refined analysis
  41. GRB 100906A: Enhanced Swift-XRT position
  42. GRB 100906A: Swift/UVOT Observations
  43. GRB100906A: MITSuME Okayama Optical Observation
  44. GRB 100906A: Ondrejov 65cm observations
  45. GRB 100906A: TLS Multicolor Observations
  46. GRB 100905A: Swift/UVOT Upper Limits
  47. GRB 100901A: TLS observations, SDSS calibration, decay slope
  48. GRB 100906A: MASTER preliminary prompt+afterglow lc
  49. GRB 100901A: ISON-NM optical observations
  50. GRB 100906A: Swift-BAT refined analysis
  51. GRB 100906A: UKIRT zYJHK Observation
  52. GRB 100906A: MASTER preliminary polarization prompt light curve
  53. GRB 100906A: Gemini-N/GMOS redshift
  54. GRB 100906A : Faulkes Telescope North optical observations
  55. GRB 100906A: MASTER early OT observations
  56. GRB 100906A: Swift detection of a burst with an optical afterglow
  57. GRB 100829A: MASTER optical observations
  58. GRB100905A: Optical upper limits at IAO
  59. GRB100905A: MITSuME Okayama optical upper limits
  60. GRB 100905A: Swift-XRT refined analysis.
  61. GRB 100905A: UKIRT zJHK Observation
  62. GRB 100901A: Possible WSRT Radio Detection
  63. GRB 100905A: Enhanced Swift-XRT position
  64. GRB 100905A: Swift-BAT refined analysis
  65. GRB100904A: BOOTES-3 Upper Limit
  66. GRB 100905A: MASTER Prompt Optical Observations
  67. GRB 100905A: Faulkes Telescope North observations
  68. GRB 100905A: Swift detection of a burst
  69. Optical observations of GRB 100901A
  70. GRB10901A: Murikabushi telescope observation at 3 days after the burst
  71. GRB 100901A: Submm observations from SMA
  72. GRB 100902A: UKIRT JK Observation
  73. GRB 100902A: GROND observations; afterglow candidate
  74. GRB 100901A: UKIRT zYJHK Observation
  75. GRB 100904A: Swift-BAT refined analysis
  76. GRB100902A: Optical upper limits at IAO
  77. GRB10901A: Optical observations at IAO
  78. Konus-Wind observation of GRB 100829A
  79. GRB 100904A: Swift detection of a burst
  80. GRB 100902A: Swift-BAT refined analysis
  81. GRB 100901A: optical observation at Mt.Terskol
  82. GRB 100901A: multicolor photometry at Mt.Terskol
  83. IPN Triangulation of the very bright GRB 100829A
  84. GRB 100901A: Lightbuckets Optical Observations
  85. GRB 100901A: HCT optical observations
  86. GRB 100902A: 1.5m OSN I-band Upper Limits
  87. Tentative redshift of GRB100902A from Swift-XRT data
  88. GRB 100902A: Swift XRT refined analysis
  89. GRB 100902A: Swift/UVOT Upper Limits
  90. GRB 100902A: optical observation at Mt.Terskol
  91. GRB 100901A: optical observation at Mt.Terskol
  92. GRB 100901A: Kanata Telescope observation of the optical afterglow
  93. GRB100901A: MITSuME Okayama Optical Observation at 1 day after the burst
  94. GRB 100902A: Enhanced Swift-XRT position
  95. GRB 100901A: TLS Observations: Break?
  96. GRB 100902A: MASTER Prompt Optical Observations
  97. GRB 100901A: ISON-NM optical observations
  98. GRB 100902A: Faulkes Telescope South observations
  99. GRB 100902A: MASTER Optical Early Limit
  100. GRB 100902A: Swift detection of a burst

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