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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"

42429 results found.

  1. GRB 070219: I-band observations
  2. GRB 070219, Swift-BAT refined analysis
  3. GRB 070219: optical TNG observations
  4. GRB 070219: Liverpool Telescope Observations
  5. GRB 070219: ROTSE-III Optical Limits
  6. GRB070219 - SDSS Pre-Burst Observations
  7. GRB 070219: Swift detection of a burst
  8. GRB 070125 observations with the GMRT
  9. GRB 070209: Redshift of a galaxy in the error circle of XRT source
  10. GRB 060927: PROMPT Observations
  11. GRB 070129: MDM I-band Detection
  12. GRB 070125: Break in Optical Decay
  13. GRB 070209: Swift XRT analysis
  14. GRB 070201: clarification on localization and Konus-Wind spectra
  15. GRB070208: optical observations
  16. GRB 070201: Proximity of IPN annulus to M31
  17. GRB 070208: MARGE Optical Observations
  18. IPN localization of very bright long hard GRB 070207
  19. IPN localization of very intense short GRB 070201
  20. GRB 070209, Swift-BAT refined analysis of the short hard burst
  21. GRB 070209: Swift detection of a short hard burst
  22. GRB 070208: Swift XRT refined analysis
  23. GRB 070208: RAPTOR detection of early afterglow onset
  24. GRB070208: Absorption and emission redshift from Gemini
  25. GRB 070208: MDM Optical Decay
  26. GRB 070208, Swift-BAT refined analysis
  27. GRB070208 - SDSS Pre-Burst Observations
  28. GRB 070208: Early IR detection and afterglow astrometry
  29. GRB 070208: Afterglow confirmation from P60
  30. GRB 070208: ROTSE-III Optical Limits
  31. GRB 070208: MDM Observations
  32. GRB 070208: Swift detection of a burst
  33. GRB 070125 detection with CARMA
  34. GRB 070125: Redshift z>~1.54 from Gemini Afterglow Spectrum
  35. GRB 070129: afterglow confirmation
  36. GRB070124: Swift-XRT Follow-up Observation
  37. GRB070126: Swift-XRT Observation
  38. GRB 070125: further AAVSO optical observations
  39. GRB 070129: dust-scattered X-ray halo detected by Swift/XRT
  40. GRB 070125: optical observation
  41. GRB 070125: WSRT Radio Detection
  42. GRB070129: MITSuME optical observation
  43. Radio detection of GRB 070125
  44. GRB061217: MAGIC telescope GeV observation
  45. GRB 070125: confirmation of pseudo-redshift
  46. GRB 070129, Swift-BAT refined analysis of a particularly long
  47. GRB 070129: Xinglong TNT optical Upper Limit
  48. GRB 070129: Swift-XRT Refined Analysis
  49. GRB 070129: VLT observations
  50. GRB 070125: An IR Point Source and an Apparent Host Galaxy
  51. GRB 070129: Swift detection of a burst
  52. GRB 070126: Swift/UVOT refined analysis
  53. GRB 070125: further AAVSO optical observations
  54. GRB 070125: MITSuME Okayama optical observation
  55. Konus-Wind observation of GRB 070125
  56. GRB 070125: AAVSO optical observations
  57. GRB 070125: optical observations
  58. GRB 070126: VLT observations
  59. GRB070126: Swift-XRT possible detection of an afterglow
  60. GRB 070125: PROMPT detections
  61. GRB 070124: Suzaku WAM observation of the prompt emissions
  62. GRB 070125: WSRT Radio Observations
  63. GRB 070125: UVOT Detection in Ultraviolet Filters
  64. GRB 070126, Swift-BAT refined analysis of a very faint burst
  65. GRB070125: Optical observation by Kanata
  66. GRB070124: Swift-XRT Observation
  67. Possible GRB 070126: Swift/UVOT Upper Limit
  68. GRB 070125: UVOT Observations of a Fading Optical Afterglow
  69. GRB 070125: Xinglong TNT optical observations
  70. GRB 070125: Continued P60 Observations
  71. GRB 070125: pseudo-z~1.5 from spectral parameters of the prompt emission
  72. GRB 070125: Keck/LRIS Spectroscopy -- Evidence for a very low redshift
  73. GRB 070125: Lick 3m Spectroscopy
  74. GRB070125: Swift-XRT Refined Analysis
  75. GRB 070125: SARA detection in R
  76. GRB 070125: P60 Optical Afterglow Candidate
  77. GRB 070126?: Swift detection of a possible burst
  78. GRB070125 redshift request
  79. RHESSI Spectrum of GRB070125
  80. IPN-BAT localization of GRB070125 (very long duration, intense)
  81. Konus-Wind observation of short hard GRB 070124
  82. IPN localization of GRB070124 (short duration, hard spectrum)
  83. GRB 070110: optical break
  84. Swift-BAT trigger 257213 is a Galactic Center transient
  85. GRB 070110: Continued Detection and Request for Ground Followup
  86. GRB 050904: Second Epoch of HST/NICMOS Observations
  87. GRB 070110: Ep,i - Eiso correlation
  88. GRB 070107: Suzaku WAM observation of the prompt emission
  89. GRB 070110: VLT R-band photometry
  90. GRB 070110 declared a "Burst of Interest" by Swift team
  91. Further Retractions of previous Swift-BAT triggers
  92. Trigger 255685: Swift detection of a possible burst
  93. GRB 070110: VLT absorption redshift
  94. GRB 070110: UVOT Observations of a Candidate Afterglow
  95. GRB070110: Swift XRT Team refined analysis
  96. GRB 070110, Swift-BAT refined analysis
  97. GRB070107 Swift/UVOT Observations of a Fading Optical Afterglow
  98. GRB 070110: Swift detection of a burst with a possible optical afterglow
  99. GRB070107: Swift/XRT refined analysis
  100. GRB 070107: Possible UVOT Afterglow

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