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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"

37750 results found.

  1. GRB 110315A: MASTER early optical observations
  2. GRB 110315A: Swift detection of a burst
  3. GRB110312A: MITSuME Okayama Optical upper limits
  4. GRB 110312A: RTT150 optical observations
  5. GRB 110312A: Swift/UVOT Upper Limits
  6. GRB 110312A: Swift-XRT refined Analysis
  7. GRB 110312A: GROND Upper Limits
  8. GRB 110312A: Enhanced Swift-XRT position
  9. GRB 110312A: Swift-BAT refined analysis
  10. GRB 110312A: Swift detection of a burst
  11. GRB 110305A: REM detection of a possible NIR afterglow
  12. GRB110305A: MITSuME Ishigakijima Optical upper limits
  13. GRB 110305A: Swift/UVOT Upper Limits
  14. GRB 110305A: Swift-XRT refined Analysis
  15. GRB 110305A: Enhanced Swift-XRT position
  16. GRB 110305A: Swift-BAT refined analysis
  17. IBAS trigger n. 6138 is not a GRB
  18. GRB 110305A: GROND Detection of Optical Afterglow
  19. GRB 110305A: Swift detection of a burst
  20. GRB 110223A: optical upper limits
  21. GRB 110301A: Fermi GBM detection
  22. GRB101225A: early EVLA Observations of Christmas Burst
  23. Swift/UVOT observations of GRB110223A
  24. No IPN GRB detected in conjunction with candidate GRB 110215
  25. GRB GRB 110223A: MASTER VWF early optical observations
  26. IBAS distribution of coordinates for low significance INTEGRAL GRB triggers
  27. GRB 110223A: Swift-BAT refined analysis
  28. GRB 110223A : early optical limit by "Pi of the Sky"
  29. GRB 110223A: Liverpool Telescope observations
  30. GRB 110223A: Swift-XRT refined Analysis
  31. GRB 110223B: Swift-XRT refined Analysis
  32. GRB 110223A: Enhanced Swift-XRT position
  33. GRB 110223B: Enhanced Swift-XRT position
  34. GRB 110223B: Swift-BAT refined analysis
  35. GRB 110223B: GROND Detection of Optical Afterglow Candidate
  36. GRB 110223A: Observations from BOOTES-2
  37. GRB 110223B: Swift detection of a burst
  38. GRB 110223A: Swift detection of a burst
  39. GRB 101225A, the review of the sky area in plate archives
  40. OT 110215: Further NIR observations from NOT of the GRB candidate
  41. GRB 110213B: Swift/UVOT observations
  42. GRB110213B: X-ray afterglow confirmation
  43. Fermi GBM detection of an SGR-like burst
  44. Swift XRT and UVOT Observations of OT 110215
  45. OT 110215: NIR observations from NOT of GRB candidate
  46. GRB 110213A: optical observations in CrAO
  47. GRB 110213B: GROND observations of the optical/NIR afterglow
  48. GRB 110213A: optical observations in Mondy
  49. Fermi GBM trigger 319534757 (110216319) is not a GRB
  50. GRB110205A: EVLA Observations
  51. OT 110215: possible GRB from 2MASS J00264184+8324093
  52. Swift/UVOT observations of GRB110210a.
  53. GRB 110210A: optical upper limit
  54. GRB 110213B: Gemini South Redshift
  55. GRB 110213B: Possible Host Galaxy in SDSS Stripe 82 Imaging
  56. GRB 110210A: ROVOR Upper Limit
  57. GRB 110213A: YNAO-GMG Observations
  58. GRB 110213B: P60 Optical Afterglow Candidate
  59. GRB 110213A: TNT optical observations
  60. GRB 110212A: Swift XRT and UVOT observations
  61. GRB 110213A: Fermi GBM observation
  62. GRB 110205A: Konkoly optical observations
  63. GRB 110213B: Swift XRT observation
  64. GRB 110213A: MITSuME Akeno Optical Observation
  65. Konus-Wind observation of GRB 110213A
  66. Konus-Wind observation of GRB 110213B
  67. GRB 110213A: Swift-XRT refined Analysis
  68. GRB 110213B: MAXI/GSC refined analysis
  69. GRB110213A: MITSuME Okayama Optical Observation
  70. GRB 110213A: Swift/UVOT refined analysis
  71. GRB 110213A: THO optical observations
  72. GRB 110213B: MAXI/GSC detection of a probable GRB
  73. GRB 110213A: Lightbuckets Optical Observations
  74. GRB 110213A, Swift-BAT refined analysis
  75. GRB 110213A: optical observations
  76. GRB 110213A: Enhanced Swift-XRT position
  77. GRB110212A: MITSuME Okayama optical upper limits
  78. GRB 110213A: KAIT observations
  79. GRB 110213A: GRAS011 optical observations
  80. GRB 110213A: Bok Telescope Redshift
  81. GRB 110213A: ROTSE-III Detection of Optical Counterpart
  82. GRB 110213A: P60 Optical Afterglow Detection
  83. GRB 110213A: Swift detection of a burst with optical afterglow
  84. GRB 110212A: GRT Optical Observation
  85. GRB 110212A, Swift-BAT refined analysis
  86. GRB 110212A: SARA-N Optical Limits
  87. GRB110212A: BOOTES-2/TELMA optical limits
  88. GRB 110212A: ROTSE-III Optical Limits
  89. GRB 110212A: Swift detection of a burst
  90. GRB 110201A: Subaru/MOIRCS Ks-band photometry
  91. Konus-Wind observation of GRB 110205A (correction to GCN 11659)
  92. GRB 110205A: detection of optical linear polarization from CAHA
  93. GRB 110207A: Suzaku WAM observation of the prompt emission
  94. GRB 110210A: optical upper limit
  95. GRB 110210A: Swift-XRT refined Analysis
  96. GRB 110205A: Swift/BAT and Suzaku/WAM joint spectral analysis
  97. GRB 110210A: Swift-BAT refined analysis
  98. GRB 110210A: Enhanced Swift-XRT position
  99. GRB 110201A: optical observations
  100. GRB 110210A: Swift detection of a burst

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