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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"

32714 results found.

  1. GRB 070223: Liverpool Telescope Possible Afterglow Candidate
  2. GRB 070223: MDM Observations
  3. Konus-Wind and Konus-A observations of GRB 070220
  4. GRB 070220: MITSuME Okayama Optical Observation
  5. GRB 070220: ART-3 Optical and NIR limits
  6. GRB 070220 Swift-BAT Refined Analysis
  7. Swift/UVOT refined analysis of GRB070220
  8. GRB 070209: Swift XRT refined analysis
  9. GRB 070220: Swift-XRT Refined Analysis
  10. GRB 070220: Observation with the KANATA 1.5m telescope
  11. GRB 070219: Gemini Observations
  12. GRB 070220 : Faulkes Telescope North optical limit
  13. GRB070219: MASTER-VWF-Kislovodsk observations
  14. GRB 070219: XRT Refined Analysis
  15. GRB 070219: Swift/UVOT Upper limits
  16. GRB 070219: I-band observations
  17. GRB 070219, Swift-BAT refined analysis
  18. GRB 070219: optical TNG observations
  19. GRB 070219: Liverpool Telescope Observations
  20. GRB 070219: ROTSE-III Optical Limits
  21. IPN triangulation of GRB070201 (refined error box using MESSENGER data)
  22. GRB 070125 observations with the GMRT
  23. GRB 070209: Redshift of a galaxy in the error circle of XRT source
  24. GRB 060927: PROMPT Observations
  25. GRB 070201: Correction to GCN 6094
  26. GRB 070125: Break in Optical Decay
  27. GRB 070209: Swift XRT analysis
  28. GRB 070201: clarification on localization and Konus-Wind spectra
  29. GRB070208: optical observations
  30. GRB 070201: IPN constraints and nearby galaxies
  31. GRB 070201: Proximity of IPN annulus to M31
  32. GRB 070208: MARGE Optical Observations
  33. GRB 070209, Swift-BAT refined analysis of the short hard burst
  34. GRB 070208: Swift XRT refined analysis
  35. GRB 070208: RAPTOR detection of early afterglow onset
  36. GRB070208: Absorption and emission redshift from Gemini
  37. GRB 070208: MDM Optical Decay
  38. GRB 070208, Swift-BAT refined analysis
  39. GRB070208 - SDSS Pre-Burst Observations
  40. GRB 070208: Early IR detection and afterglow astrometry
  41. GRB 070208: Afterglow confirmation from P60
  42. GRB070208: Faulkes Telescope North Afterglow Identification
  43. GRB 070208: ROTSE-III Optical Limits
  44. GRB 070208: MDM Observations
  45. GRB 070125 detection with CARMA
  46. GRB 070125: Redshift z>~1.54 from Gemini Afterglow Spectrum
  47. GRB 070129: afterglow confirmation
  48. GRB070124: Swift-XRT Follow-up Observation
  49. GRB070126: Swift-XRT Observation
  50. GRB 070125: further AAVSO optical observations
  51. GRB 070129: Swift/UVOT Upper limits
  52. GRB 070129: dust-scattered X-ray halo detected by Swift/XRT
  53. GRB 070125: optical observation
  54. GRB 070125: WSRT Radio Detection
  55. GRB070129: MITSuME optical observation
  56. Radio detection of GRB 070125
  57. GRB061217: MAGIC telescope GeV observation
  58. GRB 070129, Swift-BAT refined analysis of a particularly long
  59. GRB 070129: Xinglong TNT optical Upper Limit
  60. GRB 070129: Swift-XRT Refined Analysis
  61. GRB 070129: VLT observations
  62. GRB 070125: An IR Point Source and an Apparent Host Galaxy
  63. GRB 070126: Swift/UVOT refined analysis
  64. GRB 070125: further AAVSO optical observations
  65. GRB 070125: MITSuME Okayama optical observation
  66. Konus-Wind observation of GRB 070125
  67. GRB 070125: AAVSO optical observations
  68. GRB 070125: optical observations
  69. GRB 070126: VLT observations
  70. GRB070126: Swift-XRT possible detection of an afterglow
  71. GRB 070125: PROMPT detections
  72. GRB 070124: Suzaku WAM observation of the prompt emissions
  73. GRB 070125: WSRT Radio Observations
  74. GRB 070125: UVOT Detection in Ultraviolet Filters
  75. GRB 070126, Swift-BAT refined analysis of a very faint burst
  76. GRB070125: Optical observation by Kanata
  77. GRB070124: Swift-XRT Observation
  78. Possible GRB 070126: Swift/UVOT Upper Limit
  79. GRB 070125: UVOT Observations of a Fading Optical Afterglow
  80. GRB 070125: Continued P60 Observations
  81. GRB 070125: Keck/LRIS Spectroscopy -- Evidence for a very low redshift
  82. GRB 070125: Lick 3m Spectroscopy
  83. GRB070125: Swift-XRT Refined Analysis
  84. GRB 070125: SARA detection in R
  85. GRB 070125: P60 Optical Afterglow Candidate
  86. RHESSI Spectrum of GRB070125
  87. Konus-Wind observation of short hard GRB 070124
  88. GRB 070110: optical break
  89. Swift-BAT trigger 257213 is a Galactic Center transient
  90. GRB 070110: Continued Detection and Request for Ground Followup
  91. GRB 070110: Ep,i - Eiso correlation
  92. GRB 070107: Suzaku WAM observation of the prompt emission
  93. GRB 070110: VLT R-band photometry
  94. GRB 070110 declared a "Burst of Interest" by Swift team
  95. Further Retractions of previous Swift-BAT triggers
  96. GRB 070110: VLT absorption redshift
  97. GRB 070110: UVOT Observations of a Candidate Afterglow
  98. GRB070110: Swift XRT Team refined analysis
  99. GRB 070110, Swift-BAT refined analysis
  100. GRB070107 Swift/UVOT Observations of a Fading Optical Afterglow

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