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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"

36111 results found.

  1. GRB 110312A: Enhanced Swift-XRT position
  2. GRB 110312A: Swift-BAT refined analysis
  3. GRB 110312A: Swift detection of a burst
  4. GRB 110305A: REM detection of a possible NIR afterglow
  5. GRB110305A: MITSuME Ishigakijima Optical upper limits
  6. GRB 110305A: Swift/UVOT Upper Limits
  7. GRB 110305A: Swift-XRT refined Analysis
  8. GRB 110305A: Enhanced Swift-XRT position
  9. GRB 110305A: Swift-BAT refined analysis
  10. IBAS trigger n. 6138 is not a GRB
  11. GRB 110305A: GROND Detection of Optical Afterglow
  12. GRB 110305A: Swift detection of a burst
  13. GRB 110223A: optical upper limits
  14. GRB 110301A: Fermi GBM detection
  15. GRB101225A: early EVLA Observations of Christmas Burst
  16. Swift/UVOT observations of GRB110223A
  17. No IPN GRB detected in conjunction with candidate GRB 110215
  18. GRB GRB 110223A: MASTER VWF early optical observations
  19. IBAS distribution of coordinates for low significance INTEGRAL GRB triggers
  20. GRB 110223A: Swift-BAT refined analysis
  21. GRB 110223A : early optical limit by "Pi of the Sky"
  22. GRB 110223A: Liverpool Telescope observations
  23. GRB 110223A: Swift-XRT refined Analysis
  24. GRB 110223B: Swift-XRT refined Analysis
  25. GRB 110223A: Enhanced Swift-XRT position
  26. GRB 110223B: Enhanced Swift-XRT position
  27. GRB 110223B: Swift-BAT refined analysis
  28. GRB 110223B: GROND Detection of Optical Afterglow Candidate
  29. GRB 110223A: Observations from BOOTES-2
  30. GRB 110223B: Swift detection of a burst
  31. GRB 110223A: Swift detection of a burst
  32. GRB 101225A, the review of the sky area in plate archives
  33. OT 110215: Further NIR observations from NOT of the GRB candidate
  34. GRB 110213B: Swift/UVOT observations
  35. GRB110213B: X-ray afterglow confirmation
  36. Swift XRT and UVOT Observations of OT 110215
  37. OT 110215: NIR observations from NOT of GRB candidate
  38. GRB 110213A: optical observations in CrAO
  39. GRB 110213B: GROND observations of the optical/NIR afterglow
  40. GRB 110213A: optical observations in Mondy
  41. Fermi GBM trigger 319534757 (110216319) is not a GRB
  42. GRB110205A: EVLA Observations
  43. OT 110215: possible GRB from 2MASS J00264184+8324093
  44. Swift/UVOT observations of GRB110210a.
  45. GRB 110210A: optical upper limit
  46. GRB 110213B: Gemini South Redshift
  47. GRB 110213B: Possible Host Galaxy in SDSS Stripe 82 Imaging
  48. GRB 110210A: ROVOR Upper Limit
  49. GRB 110213A: YNAO-GMG Observations
  50. GRB 110213B: P60 Optical Afterglow Candidate
  51. GRB 110213A: TNT optical observations
  52. GRB 110212A: Swift XRT and UVOT observations
  53. GRB 110213A: Fermi GBM observation
  54. GRB 110205A: Konkoly optical observations
  55. GRB 110213B: Swift XRT observation
  56. GRB 110213A: MITSuME Akeno Optical Observation
  57. Konus-Wind observation of GRB 110213A
  58. Konus-Wind observation of GRB 110213B
  59. GRB 110213A: Swift-XRT refined Analysis
  60. GRB 110213B: MAXI/GSC 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: optical observations
  68. GRB 110213A: Enhanced Swift-XRT position
  69. GRB110212A: MITSuME Okayama optical upper limits
  70. GRB 110213A: KAIT observations
  71. GRB 110213A: GRAS011 optical observations
  72. GRB 110213A: Bok Telescope Redshift
  73. GRB 110213A: ROTSE-III Detection of Optical Counterpart
  74. GRB 110213A: P60 Optical Afterglow Detection
  75. GRB 110213A: Swift detection of a burst with optical afterglow
  76. GRB 110212A: GRT Optical Observation
  77. GRB 110212A, Swift-BAT refined analysis
  78. GRB 110212A: SARA-N Optical Limits
  79. GRB110212A: BOOTES-2/TELMA optical limits
  80. GRB 110212A: ROTSE-III Optical Limits
  81. GRB 110212A: Swift detection of a burst
  82. GRB 110201A: Subaru/MOIRCS Ks-band photometry
  83. Konus-Wind observation of GRB 110205A (correction to GCN 11659)
  84. GRB 110205A: detection of optical linear polarization from CAHA
  85. GRB 110207A: Suzaku WAM observation of the prompt emission
  86. GRB 110210A: optical upper limit
  87. GRB 110210A: Swift-XRT refined Analysis
  88. GRB 110205A: Swift/BAT and Suzaku/WAM joint spectral analysis
  89. GRB 110210A: Swift-BAT refined analysis
  90. GRB 110210A: Enhanced Swift-XRT position
  91. GRB 110201A: optical observations
  92. GRB 110210A: Swift detection of a burst
  93. GRB 110206A: Swift-XRT confirmation of the X-ray afterglow
  94. GRB 110208A: Magellan confirmation of the optical afterglow
  95. Swift/UVOT observations of GRB110208a
  96. GRB 110205A: Suzaku WAM observation of the prompt emission
  97. GRB 110208A: Potential afterglow from Magellan
  98. GRB 110207A: Swift-XRT observations
  99. GRB 110208A: Swift-XRT refined Analysis
  100. GRB 110208A: Enhanced Swift-XRT position

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