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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"

43039 results found.

  1. GRB 110315A: Swift detection of a burst
  2. GRB110312A: MITSuME Okayama Optical upper limits
  3. GRB 110312A: Swift/UVOT Upper Limits
  4. GRB 110312A: Swift-XRT refined Analysis
  5. GRB 110312A: GROND Upper Limits
  6. GRB 110312A: Enhanced Swift-XRT position
  7. GRB 110312A: Swift-BAT refined analysis
  8. GRB 110312A: Swift detection of a burst
  9. GRB 110305A: REM detection of a possible NIR afterglow
  10. GRB110305A: MITSuME Ishigakijima Optical upper limits
  11. GRB 110305A: Swift/UVOT Upper Limits
  12. GRB 110305A: Enhanced Swift-XRT position
  13. GRB 110305A: Swift-BAT refined analysis
  14. IBAS trigger n. 6138 is not a GRB
  15. GRB 110305A: GROND Detection of Optical Afterglow
  16. GRB 110305A: Swift detection of a burst
  17. GRB 110223A: optical upper limits
  18. GRB 110301A: Fermi GBM detection
  19. GRB101225A: early EVLA Observations of Christmas Burst
  20. Swift/UVOT observations of GRB110223A
  21. No IPN GRB detected in conjunction with candidate GRB 110215
  22. GRB GRB 110223A: MASTER VWF early optical observations
  23. IBAS distribution of coordinates for low significance INTEGRAL GRB triggers
  24. Swift/UVOT observations of GRB110223b
  25. GRB 110223A : early optical limit by "Pi of the Sky"
  26. GRB 110223A: Liverpool Telescope observations
  27. GRB 110223A: Swift-XRT refined Analysis
  28. GRB 110223B: Swift-XRT refined Analysis
  29. GRB 110223A: Enhanced Swift-XRT position
  30. GRB 110223B: Enhanced Swift-XRT position
  31. GRB 110223B: GROND Detection of Optical Afterglow Candidate
  32. GRB 110223A: Observations from BOOTES-2
  33. GRB 110223B: Swift detection of a burst
  34. GRB 110223A: Swift detection of a burst
  35. GRB 101225A, the review of the sky area in plate archives
  36. OT 110215: Further NIR observations from NOT of the GRB candidate
  37. GRB 110213B: Swift/UVOT observations
  38. GRB110213B: X-ray afterglow confirmation
  39. Fermi GBM detection of an SGR-like burst
  40. Swift XRT and UVOT Observations of OT 110215
  41. OT 110215: NIR observations from NOT of GRB candidate
  42. GRB 110213B: GROND observations of the optical/NIR afterglow
  43. GRB 110213A: optical observations in Mondy
  44. GRB110205A: EVLA Observations
  45. OT 110215: possible GRB from 2MASS J00264184+8324093
  46. Swift/UVOT observations of GRB110210a.
  47. GRB 110210A: optical upper limit
  48. GRB 110213B: Gemini South Redshift
  49. GRB 110213B: Possible Host Galaxy in SDSS Stripe 82 Imaging
  50. GRB 110210A: ROVOR Upper Limit
  51. GRB 110213B: P60 Optical Afterglow Candidate
  52. GRB110213A: RAPTOR Early Optical Peak and Plateau Measurements
  53. GRB 110212A: Swift XRT and UVOT observations
  54. Swift GRB110213A: interesting behaviour
  55. GRB 110213A: Fermi GBM observation
  56. GRB 110213B: Swift XRT observation
  57. GRB 110213A: MITSuME Akeno Optical Observation
  58. Konus-Wind observation of GRB 110213A
  59. Konus-Wind observation of GRB 110213B
  60. GRB 110213A: Swift-XRT refined Analysis
  61. GRB110213A: MITSuME Okayama Optical Observation
  62. GRB 110213A: Swift/UVOT refined analysis
  63. GRB 110213A: THO optical observations
  64. GRB 110213B: MAXI/GSC detection of a probable GRB
  65. GRB 110213A: Lightbuckets Optical Observations
  66. GRB 110213A, Swift-BAT refined analysis
  67. GRB 110213A: Enhanced Swift-XRT position
  68. GRB110212A: MITSuME Okayama optical upper limits
  69. GRB 110213A: KAIT observations
  70. GRB 110213A: GRAS011 optical observations
  71. GRB 110213A: Bok Telescope Redshift
  72. GRB 110213A: ROTSE-III Detection of Optical Counterpart
  73. GRB 110213A: P60 Optical Afterglow Detection
  74. GRB 110213A: Swift detection of a burst with optical afterglow
  75. GRB 110212A: GRT Optical Observation
  76. GRB 110212A, Swift-BAT refined analysis
  77. GRB 110212A: SARA-N Optical Limits
  78. GRB110212A: BOOTES-2/TELMA optical limits
  79. GRB 110212A: ROTSE-III Optical Limits
  80. GRB 110212A: Swift detection of a burst
  81. GRB 110201A: Subaru/MOIRCS Ks-band photometry
  82. Konus-Wind observation of GRB 110205A (correction to GCN 11659)
  83. GRB 110207A: Suzaku WAM observation of the prompt emission
  84. GRB 110210A: optical upper limit
  85. GRB 110210A: Swift-XRT refined Analysis
  86. GRB 110205A: Swift/BAT and Suzaku/WAM joint spectral analysis
  87. GRB 110210A: Swift-BAT refined analysis
  88. Swift-BAT refined analysis of outburst from 1E 1841-04.5
  89. GRB 110210A: Enhanced Swift-XRT position
  90. GRB 110201A: optical observations
  91. GRB 110210A: Swift detection of a burst
  92. GRB 110208A: Magellan confirmation of the optical afterglow
  93. Fermi GBM detection of a burst from 1E 1841-045
  94. Swift/UVOT observations of GRB110208a
  95. GRB 110205A: Suzaku WAM observation of the prompt emission
  96. GRB 110208A: Potential afterglow from Magellan
  97. GRB 110207A: Swift-XRT observations
  98. GRB 110208A: Enhanced Swift-XRT position
  99. GRB 110208A: Swift-BAT refined analysis
  100. GRB 110208A: Magellan optical observations

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