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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"

32551 results found.

  1. GRB070306: confirmation of near infrared afterglow
  2. GRB 070306: ART-3 early optical and near infrared constraints
  3. GRB 070306, Swift-BAT refined analysis
  4. GRB 070306: XRT Team Refined Analysis
  5. GRB 070306: Optical and IR observations with KANATA
  6. GRB 070223: NIR observations at WHT
  7. GRB070227: Swift-XRT refined analysis
  8. GRB 060605 new redshift
  9. GRB 070125, deep late-time optical observation
  10. VLA observation of GRB 070224
  11. GRB 070223: Optical Observations
  12. GRB 070227: optical observations
  13. GRB 070227: Swift/UVOT Upper Limits
  14. GRB 070227, Swift-BAT refined analysis
  15. GRB070227: possible X-ray afterglow detection
  16. GRB 070224: Optical afterglow confirmation
  17. GRB 070224: Swift/UVOT Upper Limits
  18. GRB070224: Swift-XRT Astrometrically Corrected Position
  19. VLA observation of GRB 070223
  20. VLA observation of GRB 070220
  21. GRB070224: Magellan Imaging Observations
  22. GRB 070224: WHT K-band imaging
  23. GRB 070224: MDM Observations
  24. GRB070224: Gemini Imaging Observations
  25. GRB070224: Swift-XRT Refined Analysis
  26. GRB 070224: optical afterglow candidate
  27. GRB 070224, Swift-BAT refined analysis
  28. GRB 070224: MASTER-Net refind analysis
  29. GRB 070224: MASTER-VWF-Kislovodsk observations
  30. GRB 070223: Optical observations
  31. RHESSI Spectrum of GRB070220
  32. GRB070223: Swift/UVOT refined analysis
  33. GRB 070223: Optical-IR observation with KANATA
  34. GRB 070223, Swift-BAT refined analysis
  35. GRB070223: MASTER-VWF-Kislovodsk observations
  36. GRB 070223: Swift-XRT Refined Analysis
  37. GRB070223 - SDSS Pre-Burst Observations
  38. GRB 070223: Liverpool Telescope Possible Afterglow Candidate
  39. GRB 070223: MDM Observations
  40. Konus-Wind and Konus-A observations of GRB 070220
  41. GRB 070220: MITSuME Okayama Optical Observation
  42. GRB 070220: ART-3 Optical and NIR limits
  43. GRB 070220 Swift-BAT Refined Analysis
  44. Swift/UVOT refined analysis of GRB070220
  45. GRB 070209: Swift XRT refined analysis
  46. GRB 070220: Swift-XRT Refined Analysis
  47. GRB 070220: Observation with the KANATA 1.5m telescope
  48. GRB 070219: Gemini Observations
  49. GRB 070220 : Faulkes Telescope North optical limit
  50. GRB070219: MASTER-VWF-Kislovodsk observations
  51. GRB 070219: XRT Refined Analysis
  52. GRB 070219: Swift/UVOT Upper limits
  53. GRB 070219: I-band observations
  54. GRB 070219, Swift-BAT refined analysis
  55. GRB 070219: optical TNG observations
  56. GRB 070219: Liverpool Telescope Observations
  57. GRB 070219: ROTSE-III Optical Limits
  58. IPN triangulation of GRB070201 (refined error box using MESSENGER data)
  59. GRB 070125 observations with the GMRT
  60. GRB 070209: Redshift of a galaxy in the error circle of XRT source
  61. GRB 060927: PROMPT Observations
  62. GRB 070201: Correction to GCN 6094
  63. GRB 070125: Break in Optical Decay
  64. GRB 070209: Swift XRT analysis
  65. GRB 070201: clarification on localization and Konus-Wind spectra
  66. GRB070208: optical observations
  67. GRB 070201: IPN constraints and nearby galaxies
  68. GRB 070201: Proximity of IPN annulus to M31
  69. GRB 070208: MARGE Optical Observations
  70. GRB 070209, Swift-BAT refined analysis of the short hard burst
  71. GRB 070208: Swift XRT refined analysis
  72. GRB 070208: RAPTOR detection of early afterglow onset
  73. GRB070208: Absorption and emission redshift from Gemini
  74. GRB 070208: MDM Optical Decay
  75. GRB 070208, Swift-BAT refined analysis
  76. GRB070208 - SDSS Pre-Burst Observations
  77. GRB 070208: Early IR detection and afterglow astrometry
  78. GRB 070208: Afterglow confirmation from P60
  79. GRB070208: Faulkes Telescope North Afterglow Identification
  80. GRB 070208: ROTSE-III Optical Limits
  81. GRB 070208: MDM Observations
  82. GRB 070125 detection with CARMA
  83. GRB 070125: Redshift z>~1.54 from Gemini Afterglow Spectrum
  84. GRB 070129: afterglow confirmation
  85. GRB070124: Swift-XRT Follow-up Observation
  86. GRB070126: Swift-XRT Observation
  87. GRB 070125: further AAVSO optical observations
  88. GRB 070129: Swift/UVOT Upper limits
  89. GRB 070129: dust-scattered X-ray halo detected by Swift/XRT
  90. GRB 070125: optical observation
  91. GRB 070125: WSRT Radio Detection
  92. GRB070129: MITSuME optical observation
  93. Radio detection of GRB 070125
  94. GRB061217: MAGIC telescope GeV observation
  95. GRB 070129, Swift-BAT refined analysis of a particularly long
  96. GRB 070129: Xinglong TNT optical Upper Limit
  97. GRB 070129: Swift-XRT Refined Analysis
  98. GRB 070129: VLT observations
  99. GRB 070125: An IR Point Source and an Apparent Host Galaxy
  100. GRB 070126: Swift/UVOT refined analysis

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