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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"

37756 results found.

  1. GRB 070223: Optical observations
  2. GRB070223: Swift/UVOT refined analysis
  3. GRB 070223: Optical-IR observation with KANATA
  4. GRB 070223, Swift-BAT refined analysis
  5. GRB 070223: Swift-XRT Refined Analysis
  6. GRB 070220: pseudo-z~2.15 from spectral parameters of the prompt
  7. GRB070223 - SDSS Pre-Burst Observations
  8. GRB 070223: Liverpool Telescope Possible Afterglow Candidate
  9. GRB 070223: MDM Observations
  10. GRB070223: Swift burst
  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. GRB 070220: Swift detection of a burst
  22. GRB070219: MASTER-VWF-Kislovodsk observations
  23. GRB 070219: XRT Refined Analysis
  24. GRB 070219: Swift/UVOT Upper limits
  25. GRB 070219: I-band observations
  26. GRB 070219, Swift-BAT refined analysis
  27. GRB 070219: optical TNG observations
  28. GRB 070219: Liverpool Telescope Observations
  29. GRB 070219: ROTSE-III Optical Limits
  30. GRB070219 - SDSS Pre-Burst Observations
  31. GRB 070219: Swift detection of a burst
  32. IPN triangulation of GRB070201 (refined error box using MESSENGER data)
  33. GRB 070125 observations with the GMRT
  34. GRB 070209: Redshift of a galaxy in the error circle of XRT source
  35. Swift-BAT trigger 260304 is NOT a burst or transient
  36. GRB 060927: PROMPT Observations
  37. GRB 070201: Correction to GCN 6094
  38. GRB 070129: MDM I-band Detection
  39. GRB 070125: Break in Optical Decay
  40. GRB 070209: Swift XRT analysis
  41. GRB 070201: clarification on localization and Konus-Wind spectra
  42. GRB070208: optical observations
  43. GRB 070201: IPN constraints and nearby galaxies
  44. GRB 070201: Proximity of IPN annulus to M31
  45. GRB 070208: MARGE Optical Observations
  46. IPN localization of very bright long hard GRB 070207
  47. IPN localization of very intense short GRB 070201
  48. GRB 070209, Swift-BAT refined analysis of the short hard burst
  49. GRB 070209: Swift detection of a short hard burst
  50. GRB 070208: Swift XRT refined analysis
  51. GRB 070208: RAPTOR detection of early afterglow onset
  52. GRB070208: Absorption and emission redshift from Gemini
  53. GRB 070208: MDM Optical Decay
  54. GRB 070208, Swift-BAT refined analysis
  55. GRB070208 - SDSS Pre-Burst Observations
  56. GRB 070208: Early IR detection and afterglow astrometry
  57. GRB 070208: Afterglow confirmation from P60
  58. GRB070208: Faulkes Telescope North Afterglow Identification
  59. GRB 070208: ROTSE-III Optical Limits
  60. GRB 070208: MDM Observations
  61. GRB 070208: Swift detection of a burst
  62. GRB 070125 detection with CARMA
  63. Swift-BAT trigger 259527 is a Cosmic Ray Shower
  64. GRB 070125: Redshift z>~1.54 from Gemini Afterglow Spectrum
  65. GRB 070129: afterglow confirmation
  66. GRB070124: Swift-XRT Follow-up Observation
  67. GRB070126: Swift-XRT Observation
  68. GRB 070125: further AAVSO optical observations
  69. GRB 070129: Swift/UVOT Upper limits
  70. GRB 070129: dust-scattered X-ray halo detected by Swift/XRT
  71. GRB 070125: optical observation
  72. GRB 070125: WSRT Radio Detection
  73. Radio detection of GRB 070125
  74. GRB061217: MAGIC telescope GeV observation
  75. GRB 070125: confirmation of pseudo-redshift
  76. GRB 070129, Swift-BAT refined analysis of a particularly long
  77. GRB 070129: Xinglong TNT optical Upper Limit
  78. GRB 070129: Swift-XRT Refined Analysis
  79. GRB 070129: VLT observations
  80. GRB 070125: An IR Point Source and an Apparent Host Galaxy
  81. GRB 070129: Swift detection of a burst
  82. GRB 070126: Swift/UVOT refined analysis
  83. GRB 070125: further AAVSO optical observations
  84. GRB 070125: MITSuME Okayama optical observation
  85. Konus-Wind observation of GRB 070125
  86. GRB 070125: AAVSO optical observations
  87. GRB 070125: optical observations
  88. GRB 070126: VLT observations
  89. GRB070126: Swift-XRT possible detection of an afterglow
  90. GRB 070125: PROMPT detections
  91. GRB 070124: Suzaku WAM observation of the prompt emissions
  92. GRB 070125: WSRT Radio Observations
  93. GRB 070125: UVOT Detection in Ultraviolet Filters
  94. GRB 070126, Swift-BAT refined analysis of a very faint burst
  95. GRB070125: Optical observation by Kanata
  96. Possible GRB 070126: Swift/UVOT Upper Limit
  97. GRB 070125: UVOT Observations of a Fading Optical Afterglow
  98. GRB 070125: Xinglong TNT optical observations
  99. GRB 070125: Continued P60 Observations
  100. GRB 070125: pseudo-z~1.5 from spectral parameters of the prompt emission

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