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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"

39364 results found.

  1. GRB 110305A: Swift detection of a burst
  2. GRB 110223A: optical upper limits
  3. GRB 110301A: Fermi GBM detection
  4. GRB101225A: early EVLA Observations of Christmas Burst
  5. Swift/UVOT observations of GRB110223A
  6. No IPN GRB detected in conjunction with candidate GRB 110215
  7. GRB GRB 110223A: MASTER VWF early optical observations
  8. IBAS distribution of coordinates for low significance INTEGRAL GRB triggers
  9. GRB 110223A: Swift-BAT refined analysis
  10. GRB 110223A : early optical limit by "Pi of the Sky"
  11. GRB 110223A: Liverpool Telescope observations
  12. GRB 110223A: Swift-XRT refined Analysis
  13. GRB 110223B: Swift-XRT refined Analysis
  14. GRB 110223A: Enhanced Swift-XRT position
  15. GRB 110223B: Enhanced Swift-XRT position
  16. GRB 110223B: Swift-BAT refined analysis
  17. GRB 110223B: GROND Detection of Optical Afterglow Candidate
  18. GRB 110223A: Observations from BOOTES-2
  19. GRB 110223B: Swift detection of a burst
  20. GRB 110223A: Swift detection of a burst
  21. GRB 101225A, the review of the sky area in plate archives
  22. OT 110215: Further NIR observations from NOT of the GRB candidate
  23. GRB 110213B: Swift/UVOT observations
  24. GRB110213B: X-ray afterglow confirmation
  25. Swift XRT and UVOT Observations of OT 110215
  26. OT 110215: NIR observations from NOT of GRB candidate
  27. GRB 110213A: optical observations in CrAO
  28. GRB 110213B: GROND observations of the optical/NIR afterglow
  29. GRB 110213A: optical observations in Mondy
  30. Fermi GBM trigger 319534757 (110216319) is not a GRB
  31. GRB110205A: EVLA Observations
  32. OT 110215: possible GRB from 2MASS J00264184+8324093
  33. Swift/UVOT observations of GRB110210a.
  34. GRB 110210A: optical upper limit
  35. GRB 110213B: Gemini South Redshift
  36. GRB 110213B: Possible Host Galaxy in SDSS Stripe 82 Imaging
  37. GRB 110210A: ROVOR Upper Limit
  38. GRB 110213A: YNAO-GMG Observations
  39. GRB 110213B: P60 Optical Afterglow Candidate
  40. GRB 110213A: TNT optical observations
  41. GRB 110212A: Swift XRT and UVOT observations
  42. GRB 110213A: Fermi GBM observation
  43. GRB 110205A: Konkoly optical observations
  44. GRB 110213B: Swift XRT observation
  45. GRB 110213A: MITSuME Akeno Optical Observation
  46. Konus-Wind observation of GRB 110213A
  47. Konus-Wind observation of GRB 110213B
  48. GRB 110213A: Swift-XRT refined Analysis
  49. GRB 110213B: MAXI/GSC refined analysis
  50. GRB110213A: MITSuME Okayama Optical Observation
  51. GRB 110213A: Swift/UVOT refined analysis
  52. GRB 110213A: THO optical observations
  53. GRB 110213B: MAXI/GSC detection of a probable GRB
  54. GRB 110213A: Lightbuckets Optical Observations
  55. GRB 110213A, Swift-BAT refined analysis
  56. GRB 110213A: optical observations
  57. GRB 110213A: Enhanced Swift-XRT position
  58. GRB110212A: MITSuME Okayama optical upper limits
  59. GRB 110213A: KAIT observations
  60. GRB 110213A: GRAS011 optical observations
  61. GRB 110213A: Bok Telescope Redshift
  62. GRB 110213A: ROTSE-III Detection of Optical Counterpart
  63. GRB 110213A: P60 Optical Afterglow Detection
  64. GRB 110213A: Swift detection of a burst with optical afterglow
  65. GRB 110212A: GRT Optical Observation
  66. GRB 110212A, Swift-BAT refined analysis
  67. GRB 110212A: SARA-N Optical Limits
  68. GRB110212A: BOOTES-2/TELMA optical limits
  69. GRB 110212A: ROTSE-III Optical Limits
  70. GRB 110212A: Swift detection of a burst
  71. GRB 110201A: Subaru/MOIRCS Ks-band photometry
  72. Konus-Wind observation of GRB 110205A (correction to GCN 11659)
  73. GRB 110205A: detection of optical linear polarization from CAHA
  74. GRB 110207A: Suzaku WAM observation of the prompt emission
  75. GRB 110210A: optical upper limit
  76. GRB 110210A: Swift-XRT refined Analysis
  77. GRB 110205A: Swift/BAT and Suzaku/WAM joint spectral analysis
  78. GRB 110210A: Swift-BAT refined analysis
  79. GRB 110210A: Enhanced Swift-XRT position
  80. GRB 110201A: optical observations
  81. GRB 110210A: Swift detection of a burst
  82. GRB 110206A: Swift-XRT confirmation of the X-ray afterglow
  83. GRB 110208A: Magellan confirmation of the optical afterglow
  84. Swift/UVOT observations of GRB110208a
  85. GRB 110205A: Suzaku WAM observation of the prompt emission
  86. GRB 110208A: Potential afterglow from Magellan
  87. GRB 110207A: Swift-XRT observations
  88. GRB 110208A: Swift-XRT refined Analysis
  89. GRB 110208A: Enhanced Swift-XRT position
  90. GRB 110208A: Swift-BAT refined analysis
  91. GRB 110208A: Magellan optical observations
  92. GRB 110206A: SMARTS optical/IR afterglow decay
  93. GRB 110208A: Swift detection of a burst
  94. SGR-like outburst from the magnetar 1E 1841-04.5
  95. GRB 110205A: optical observations in Mondy observatory
  96. GRB 110207A: Fermi GBM observation
  97. GRB 110205A : HCT optical observations
  98. GRB 110206A: Decay of afterglow candidate
  99. GRB 110206A: SMARTS optical/IR afterglow candidate observations
  100. GRB 110207A: TAROT Calern observatory optical observations

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