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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"

23581 results found.

  1. GRB110305A: MITSuME Ishigakijima Optical upper limits
  2. GRB 110305A: Swift/UVOT Upper Limits
  3. GRB 110305A: Enhanced Swift-XRT position
  4. GRB 110305A: GROND Detection of Optical Afterglow
  5. GRB 110305A: Swift detection of a burst
  6. GRB 110223A: optical upper limits
  7. GRB 110301A: Fermi GBM detection
  8. GRB101225A: early EVLA Observations of Christmas Burst
  9. Swift/UVOT observations of GRB110223A
  10. No IPN GRB detected in conjunction with candidate GRB 110215
  11. IBAS distribution of coordinates for low significance INTEGRAL GRB triggers
  12. Swift/UVOT observations of GRB110223b
  13. GRB 110223A : early optical limit by "Pi of the Sky"
  14. GRB 110223A: Enhanced Swift-XRT position
  15. GRB 110223B: Enhanced Swift-XRT position
  16. GRB 110223B: GROND Detection of Optical Afterglow Candidate
  17. GRB 110223A: Observations from BOOTES-2
  18. GRB 110223B: Swift detection of a burst
  19. GRB 110223A: Swift detection of a burst
  20. OT 110215: Further NIR observations from NOT of the GRB candidate
  21. GRB 110213B: Swift/UVOT observations
  22. Fermi GBM detection of an SGR-like burst
  23. Swift XRT and UVOT Observations of OT 110215
  24. OT 110215: NIR observations from NOT of GRB candidate
  25. GRB 110213A: optical observations in CrAO
  26. GRB 110213B: GROND observations of the optical/NIR afterglow
  27. OT 110215: possible GRB from 2MASS J00264184+8324093
  28. Swift/UVOT observations of GRB110210a.
  29. GRB 110210A: optical upper limit
  30. GRB 110213B: Possible Host Galaxy in SDSS Stripe 82 Imaging
  31. GRB 110210A: ROVOR Upper Limit
  32. GRB 110213B: P60 Optical Afterglow Candidate
  33. GRB110213A: RAPTOR Early Optical Peak and Plateau Measurements
  34. GRB 110212A: Swift XRT and UVOT observations
  35. GRB 110205A: Konkoly optical observations
  36. GRB 110213B: Swift XRT observation
  37. GRB 110213A: MITSuME Akeno Optical Observation
  38. Konus-Wind observation of GRB 110213B
  39. GRB110213A: MITSuME Okayama Optical Observation
  40. GRB 110213A: Swift/UVOT refined analysis
  41. GRB 110213A, Swift-BAT refined analysis
  42. GRB 110213A: optical observations
  43. GRB 110213A: Enhanced Swift-XRT position
  44. GRB110212A: MITSuME Okayama optical upper limits
  45. GRB 110213A: P60 Optical Afterglow Detection
  46. GRB 110213A: Swift detection of a burst with optical afterglow
  47. GRB 110212A: GRT Optical Observation
  48. GRB 110212A: SARA-N Optical Limits
  49. GRB110212A: BOOTES-2/TELMA optical limits
  50. GRB 110212A: ROTSE-III Optical Limits
  51. GRB 110212A: Swift detection of a burst
  52. GRB 110201A: Subaru/MOIRCS Ks-band photometry
  53. GRB 110205A: detection of optical linear polarization from CAHA
  54. GRB 110205A: Swift/BAT and Suzaku/WAM joint spectral analysis
  55. GRB 110210A: Enhanced Swift-XRT position
  56. GRB 110201A: optical observations
  57. GRB 110210A: Swift detection of a burst
  58. GRB 110208A: Magellan confirmation of the optical afterglow
  59. Fermi GBM detection of a burst from 1E 1841-045
  60. Swift/UVOT observations of GRB110208a
  61. GRB 110207A: Swift-XRT observations
  62. GRB 110208A: Enhanced Swift-XRT position
  63. GRB 110208A: Swift detection of a burst
  64. SGR-like outburst from the magnetar 1E 1841-04.5
  65. GRB 110205A : HCT optical observations
  66. GRB 110206A: Decay of afterglow candidate
  67. GRB 110206A: SMARTS optical/IR afterglow candidate observations
  68. GRB 110207A: TAROT Calern observatory optical observations
  69. GRB 110206A: GROND detection of afterglow candidate
  70. GRB 110206A: UVOT detection of afterglow candidate
  71. GRB110205A: CARMA 3mm Observations
  72. GRB 110207A: MASTER prompt and early optical observations
  73. Konus-Wind observation of GRB 110205A
  74. GRB 110207A: Swift detection of a burst
  75. GRB 110206A: Swift detection of a probable X-ray afterglow
  76. GRB 110206A: TAROT La Silla observatory optical observations
  77. GRB110205A: MITSuME Ishigakijima Optical Observation
  78. GRB110205A: MITSuME Okayama Optical Observation
  79. GRB110205A: SMA 1.3mm Observations
  80. GRB 110205A: Swift/UVOT Continuing Observations
  81. Observations GRB 110205A
  82. GRB 110205A: Newcastle Observatory Optical Observations
  83. GRB 110205A: LOAO B/R Observation
  84. GRB 110205A: optical flare confirmation
  85. GRB 110205A: NOT redshift confirmation
  86. GRB 110205A: Enhanced Swift-XRT position
  87. GRB 110205A: PAIRITEL NIR Afterglow Detection
  88. GRB 110205A: Swift/UVOT Confirmation of Flaring Afterglow
  89. GRB 110205A: TAROT Calern observatory detection of an optical flare
  90. GRB 110205A: TAROT Calern observatory optical detection
  91. GRB 110205A: Swift detection of a burst with an optical candidate
  92. GRB110201A: MITSuME Okayama optical upper limits
  93. Swift/UVOT observations of GRB110201A
  94. GRB 110201A: Swift-BAT refined analysis
  95. GRB 110201A: MASTER optical observations
  96. GRB 110201A: Swift detection of a burst
  97. GRB101224A: EVLA Observations
  98. GRB110112A: EVLA Observations
  99. GRB110128A: MITSuME Okayama optical upper limits
  100. GRB 110125A: Fermi GBM detection

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