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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"

32740 results found.

  1. GRB 070227: optical observations
  2. GRB 070227: Swift/UVOT Upper Limits
  3. GRB 070227, Swift-BAT refined analysis
  4. GRB070227: possible X-ray afterglow detection
  5. GRB 070224: Optical afterglow confirmation
  6. GRB 070224: Swift/UVOT Upper Limits
  7. GRB070224: Swift-XRT Astrometrically Corrected Position
  8. VLA observation of GRB 070223
  9. VLA observation of GRB 070220
  10. GRB070224: Magellan Imaging Observations
  11. GRB 070224: WHT K-band imaging
  12. GRB 070224: MDM Observations
  13. GRB070224: Gemini Imaging Observations
  14. GRB070224: Swift-XRT Refined Analysis
  15. GRB 070224: optical afterglow candidate
  16. GRB 070224, Swift-BAT refined analysis
  17. GRB 070224: MASTER-Net refind analysis
  18. GRB 070224: MASTER-VWF-Kislovodsk observations
  19. GRB 070223: Optical observations
  20. RHESSI Spectrum of GRB070220
  21. GRB070223: Swift/UVOT refined analysis
  22. GRB 070223: Optical-IR observation with KANATA
  23. GRB 070223, Swift-BAT refined analysis
  24. GRB070223: MASTER-VWF-Kislovodsk observations
  25. GRB 070223: Swift-XRT Refined Analysis
  26. GRB070223 - SDSS Pre-Burst Observations
  27. GRB 070223: Liverpool Telescope Possible Afterglow Candidate
  28. GRB 070223: MDM Observations
  29. Konus-Wind and Konus-A observations of GRB 070220
  30. GRB 070220: MITSuME Okayama Optical Observation
  31. GRB 070220: ART-3 Optical and NIR limits
  32. GRB 070220 Swift-BAT Refined Analysis
  33. Swift/UVOT refined analysis of GRB070220
  34. GRB 070209: Swift XRT refined analysis
  35. GRB 070220: Swift-XRT Refined Analysis
  36. GRB 070220: Observation with the KANATA 1.5m telescope
  37. GRB 070219: Gemini Observations
  38. GRB 070220 : Faulkes Telescope North optical limit
  39. GRB070219: MASTER-VWF-Kislovodsk observations
  40. GRB 070219: XRT Refined Analysis
  41. GRB 070219: Swift/UVOT Upper limits
  42. GRB 070219: I-band observations
  43. GRB 070219, Swift-BAT refined analysis
  44. GRB 070219: optical TNG observations
  45. GRB 070219: Liverpool Telescope Observations
  46. GRB 070219: ROTSE-III Optical Limits
  47. IPN triangulation of GRB070201 (refined error box using MESSENGER data)
  48. GRB 070125 observations with the GMRT
  49. GRB 070209: Redshift of a galaxy in the error circle of XRT source
  50. GRB 060927: PROMPT Observations
  51. GRB 070201: Correction to GCN 6094
  52. GRB 070125: Break in Optical Decay
  53. GRB 070209: Swift XRT analysis
  54. GRB 070201: clarification on localization and Konus-Wind spectra
  55. GRB070208: optical observations
  56. GRB 070201: IPN constraints and nearby galaxies
  57. GRB 070201: Proximity of IPN annulus to M31
  58. GRB 070208: MARGE Optical Observations
  59. GRB 070209, Swift-BAT refined analysis of the short hard burst
  60. GRB 070208: Swift XRT refined analysis
  61. GRB 070208: RAPTOR detection of early afterglow onset
  62. GRB070208: Absorption and emission redshift from Gemini
  63. GRB 070208: MDM Optical Decay
  64. GRB 070208, Swift-BAT refined analysis
  65. GRB070208 - SDSS Pre-Burst Observations
  66. GRB 070208: Early IR detection and afterglow astrometry
  67. GRB 070208: Afterglow confirmation from P60
  68. GRB070208: Faulkes Telescope North Afterglow Identification
  69. GRB 070208: ROTSE-III Optical Limits
  70. GRB 070208: MDM Observations
  71. GRB 070125 detection with CARMA
  72. GRB 070125: Redshift z>~1.54 from Gemini Afterglow Spectrum
  73. GRB 070129: afterglow confirmation
  74. GRB070124: Swift-XRT Follow-up Observation
  75. GRB070126: Swift-XRT Observation
  76. GRB 070125: further AAVSO optical observations
  77. GRB 070129: Swift/UVOT Upper limits
  78. GRB 070129: dust-scattered X-ray halo detected by Swift/XRT
  79. GRB 070125: optical observation
  80. GRB 070125: WSRT Radio Detection
  81. GRB070129: MITSuME optical observation
  82. Radio detection of GRB 070125
  83. GRB061217: MAGIC telescope GeV observation
  84. GRB 070129, Swift-BAT refined analysis of a particularly long
  85. GRB 070129: Xinglong TNT optical Upper Limit
  86. GRB 070129: Swift-XRT Refined Analysis
  87. GRB 070129: VLT observations
  88. GRB 070125: An IR Point Source and an Apparent Host Galaxy
  89. GRB 070126: Swift/UVOT refined analysis
  90. GRB 070125: further AAVSO optical observations
  91. GRB 070125: MITSuME Okayama optical observation
  92. Konus-Wind observation of GRB 070125
  93. GRB 070125: AAVSO optical observations
  94. GRB 070125: optical observations
  95. GRB 070126: VLT observations
  96. GRB070126: Swift-XRT possible detection of an afterglow
  97. GRB 070125: PROMPT detections
  98. GRB 070124: Suzaku WAM observation of the prompt emissions
  99. GRB 070125: WSRT Radio Observations
  100. GRB 070125: UVOT Detection in Ultraviolet Filters

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