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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"

32722 results found.

  1. GRB 070223: Optical observations
  2. RHESSI Spectrum of GRB070220
  3. GRB070223: Swift/UVOT refined analysis
  4. GRB 070223: Optical-IR observation with KANATA
  5. GRB 070223, Swift-BAT refined analysis
  6. GRB070223: MASTER-VWF-Kislovodsk observations
  7. GRB 070223: Swift-XRT Refined Analysis
  8. GRB070223 - SDSS Pre-Burst Observations
  9. GRB 070223: Liverpool Telescope Possible Afterglow Candidate
  10. GRB 070223: MDM Observations
  11. Konus-Wind and Konus-A observations of GRB 070220
  12. GRB 070220: MITSuME Okayama Optical Observation
  13. GRB 070220: ART-3 Optical and NIR limits
  14. GRB 070220 Swift-BAT Refined Analysis
  15. Swift/UVOT refined analysis of GRB070220
  16. GRB 070209: Swift XRT refined analysis
  17. GRB 070220: Swift-XRT Refined Analysis
  18. GRB 070220: Observation with the KANATA 1.5m telescope
  19. GRB 070219: Gemini Observations
  20. GRB 070220 : Faulkes Telescope North optical limit
  21. GRB070219: MASTER-VWF-Kislovodsk observations
  22. GRB 070219: XRT Refined Analysis
  23. GRB 070219: Swift/UVOT Upper limits
  24. GRB 070219: I-band observations
  25. GRB 070219, Swift-BAT refined analysis
  26. GRB 070219: optical TNG observations
  27. GRB 070219: Liverpool Telescope Observations
  28. GRB 070219: ROTSE-III Optical Limits
  29. IPN triangulation of GRB070201 (refined error box using MESSENGER data)
  30. GRB 070125 observations with the GMRT
  31. GRB 070209: Redshift of a galaxy in the error circle of XRT source
  32. GRB 060927: PROMPT Observations
  33. GRB 070201: Correction to GCN 6094
  34. GRB 070125: Break in Optical Decay
  35. GRB 070209: Swift XRT analysis
  36. GRB 070201: clarification on localization and Konus-Wind spectra
  37. GRB070208: optical observations
  38. GRB 070201: IPN constraints and nearby galaxies
  39. GRB 070201: Proximity of IPN annulus to M31
  40. GRB 070208: MARGE Optical Observations
  41. GRB 070209, Swift-BAT refined analysis of the short hard burst
  42. GRB 070208: Swift XRT refined analysis
  43. GRB 070208: RAPTOR detection of early afterglow onset
  44. GRB070208: Absorption and emission redshift from Gemini
  45. GRB 070208: MDM Optical Decay
  46. GRB 070208, Swift-BAT refined analysis
  47. GRB070208 - SDSS Pre-Burst Observations
  48. GRB 070208: Early IR detection and afterglow astrometry
  49. GRB 070208: Afterglow confirmation from P60
  50. GRB070208: Faulkes Telescope North Afterglow Identification
  51. GRB 070208: ROTSE-III Optical Limits
  52. GRB 070208: MDM Observations
  53. GRB 070125 detection with CARMA
  54. GRB 070125: Redshift z>~1.54 from Gemini Afterglow Spectrum
  55. GRB 070129: afterglow confirmation
  56. GRB070124: Swift-XRT Follow-up Observation
  57. GRB070126: Swift-XRT Observation
  58. GRB 070125: further AAVSO optical observations
  59. GRB 070129: Swift/UVOT Upper limits
  60. GRB 070129: dust-scattered X-ray halo detected by Swift/XRT
  61. GRB 070125: optical observation
  62. GRB 070125: WSRT Radio Detection
  63. GRB070129: MITSuME optical observation
  64. Radio detection of GRB 070125
  65. GRB061217: MAGIC telescope GeV observation
  66. GRB 070129, Swift-BAT refined analysis of a particularly long
  67. GRB 070129: Xinglong TNT optical Upper Limit
  68. GRB 070129: Swift-XRT Refined Analysis
  69. GRB 070129: VLT observations
  70. GRB 070125: An IR Point Source and an Apparent Host Galaxy
  71. GRB 070126: Swift/UVOT refined analysis
  72. GRB 070125: further AAVSO optical observations
  73. GRB 070125: MITSuME Okayama optical observation
  74. Konus-Wind observation of GRB 070125
  75. GRB 070125: AAVSO optical observations
  76. GRB 070125: optical observations
  77. GRB 070126: VLT observations
  78. GRB070126: Swift-XRT possible detection of an afterglow
  79. GRB 070125: PROMPT detections
  80. GRB 070124: Suzaku WAM observation of the prompt emissions
  81. GRB 070125: WSRT Radio Observations
  82. GRB 070125: UVOT Detection in Ultraviolet Filters
  83. GRB 070126, Swift-BAT refined analysis of a very faint burst
  84. GRB070125: Optical observation by Kanata
  85. GRB070124: Swift-XRT Observation
  86. Possible GRB 070126: Swift/UVOT Upper Limit
  87. GRB 070125: UVOT Observations of a Fading Optical Afterglow
  88. GRB 070125: Continued P60 Observations
  89. GRB 070125: Keck/LRIS Spectroscopy -- Evidence for a very low redshift
  90. GRB 070125: Lick 3m Spectroscopy
  91. GRB070125: Swift-XRT Refined Analysis
  92. GRB 070125: SARA detection in R
  93. GRB 070125: P60 Optical Afterglow Candidate
  94. RHESSI Spectrum of GRB070125
  95. Konus-Wind observation of short hard GRB 070124
  96. GRB 070110: optical break
  97. Swift-BAT trigger 257213 is a Galactic Center transient
  98. GRB 070110: Continued Detection and Request for Ground Followup
  99. GRB 070110: Ep,i - Eiso correlation
  100. GRB 070107: Suzaku WAM observation of the prompt emission

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