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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"

23463 results found.

  1. GRB 110223A: Swift detection of a burst
  2. OT 110215: Further NIR observations from NOT of the GRB candidate
  3. GRB 110213B: Swift/UVOT observations
  4. Fermi GBM detection of an SGR-like burst
  5. Swift XRT and UVOT Observations of OT 110215
  6. OT 110215: NIR observations from NOT of GRB candidate
  7. GRB 110213A: optical observations in CrAO
  8. GRB 110213B: GROND observations of the optical/NIR afterglow
  9. OT 110215: possible GRB from 2MASS J00264184+8324093
  10. Swift/UVOT observations of GRB110210a.
  11. GRB 110210A: optical upper limit
  12. GRB 110213B: Possible Host Galaxy in SDSS Stripe 82 Imaging
  13. GRB 110210A: ROVOR Upper Limit
  14. GRB 110213B: P60 Optical Afterglow Candidate
  15. GRB110213A: RAPTOR Early Optical Peak and Plateau Measurements
  16. GRB 110212A: Swift XRT and UVOT observations
  17. GRB 110205A: Konkoly optical observations
  18. GRB 110213B: Swift XRT observation
  19. GRB 110213A: MITSuME Akeno Optical Observation
  20. Konus-Wind observation of GRB 110213B
  21. GRB110213A: MITSuME Okayama Optical Observation
  22. GRB 110213A: Swift/UVOT refined analysis
  23. GRB 110213A, Swift-BAT refined analysis
  24. GRB 110213A: optical observations
  25. GRB 110213A: Enhanced Swift-XRT position
  26. GRB110212A: MITSuME Okayama optical upper limits
  27. GRB 110213A: P60 Optical Afterglow Detection
  28. GRB 110213A: Swift detection of a burst with optical afterglow
  29. GRB 110212A: GRT Optical Observation
  30. GRB 110212A: SARA-N Optical Limits
  31. GRB110212A: BOOTES-2/TELMA optical limits
  32. GRB 110212A: ROTSE-III Optical Limits
  33. GRB 110212A: Swift detection of a burst
  34. GRB 110201A: Subaru/MOIRCS Ks-band photometry
  35. GRB 110205A: detection of optical linear polarization from CAHA
  36. GRB 110205A: Swift/BAT and Suzaku/WAM joint spectral analysis
  37. GRB 110210A: Enhanced Swift-XRT position
  38. GRB 110201A: optical observations
  39. GRB 110210A: Swift detection of a burst
  40. GRB 110208A: Magellan confirmation of the optical afterglow
  41. Fermi GBM detection of a burst from 1E 1841-045
  42. Swift/UVOT observations of GRB110208a
  43. GRB 110207A: Swift-XRT observations
  44. GRB 110208A: Enhanced Swift-XRT position
  45. GRB 110208A: Swift detection of a burst
  46. SGR-like outburst from the magnetar 1E 1841-04.5
  47. GRB 110205A : HCT optical observations
  48. GRB 110206A: Decay of afterglow candidate
  49. GRB 110206A: SMARTS optical/IR afterglow candidate observations
  50. GRB 110207A: TAROT Calern observatory optical observations
  51. GRB 110206A: GROND detection of afterglow candidate
  52. GRB 110206A: UVOT detection of afterglow candidate
  53. GRB110205A: CARMA 3mm Observations
  54. GRB 110207A: MASTER prompt and early optical observations
  55. Konus-Wind observation of GRB 110205A
  56. GRB 110207A: Swift detection of a burst
  57. GRB 110206A: Swift detection of a probable X-ray afterglow
  58. GRB 110206A: TAROT La Silla observatory optical observations
  59. GRB110205A: MITSuME Ishigakijima Optical Observation
  60. GRB110205A: MITSuME Okayama Optical Observation
  61. GRB110205A: SMA 1.3mm Observations
  62. GRB 110205A: Swift/UVOT Continuing Observations
  63. Observations GRB 110205A
  64. GRB 110205A: Newcastle Observatory Optical Observations
  65. GRB 110205A: LOAO B/R Observation
  66. GRB 110205A: optical flare confirmation
  67. GRB 110205A: NOT redshift confirmation
  68. GRB 110205A: Enhanced Swift-XRT position
  69. GRB 110205A: PAIRITEL NIR Afterglow Detection
  70. GRB 110205A: Swift/UVOT Confirmation of Flaring Afterglow
  71. GRB 110205A: TAROT Calern observatory detection of an optical flare
  72. GRB 110205A: TAROT Calern observatory optical detection
  73. GRB 110205A: Swift detection of a burst with an optical candidate
  74. GRB110201A: MITSuME Okayama optical upper limits
  75. Swift/UVOT observations of GRB110201A
  76. GRB 110201A: Swift-BAT refined analysis
  77. GRB 110201A: MASTER optical observations
  78. GRB 110201A: Swift detection of a burst
  79. GRB101224A: EVLA Observations
  80. GRB110112A: EVLA Observations
  81. GRB110128A: MITSuME Okayama optical upper limits
  82. GRB 110125A: Fermi GBM detection
  83. GRB 101112A: Maidanak and CrAO optical observations
  84. GRB110128A: TNG NIR observations
  85. GRB 110128A, Swift-BAT refined analysis
  86. GRB 110128A: Swift/UVOT observations
  87. GRB 110128A: WHT redshifts of nearby field galaxies
  88. GRB 110128A: Enhanced Swift-XRT position
  89. GRB 110128A: Afterglow detection from NOT
  90. GRB 110128A: TAROT Calern observatory upper limits
  91. GRB 110128A: Swift detection of a burst
  92. GRB 110123A: Fermi GBM detection
  93. GRB 110106B, radio observations
  94. GRB 110120A: MASTER optical observations
  95. IPN triangulation of GRB 110120A
  96. GRB 101225A: CQUEAN optical observation
  97. GRB 110106A: CrAO optical observations
  98. GRB 110120A: Fermi GBM detection
  99. GRB 110112A: optical upper limit
  100. GRB110119: Swift/UVOT Detection

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