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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"

36134 results found.

  1. GRB 070219: XRT Refined Analysis
  2. GRB 070219: Swift/UVOT Upper limits
  3. GRB 070219: I-band observations
  4. GRB 070219, Swift-BAT refined analysis
  5. GRB 070219: optical TNG observations
  6. GRB 070219: Liverpool Telescope Observations
  7. GRB 070219: ROTSE-III Optical Limits
  8. GRB070219 - SDSS Pre-Burst Observations
  9. GRB 070219: Swift detection of a burst
  10. IPN triangulation of GRB070201 (refined error box using MESSENGER data)
  11. GRB 070125 observations with the GMRT
  12. GRB 070209: Redshift of a galaxy in the error circle of XRT source
  13. Swift-BAT trigger 260304 is NOT a burst or transient
  14. GRB 060927: PROMPT Observations
  15. GRB 070201: Correction to GCN 6094
  16. GRB 070129: MDM I-band Detection
  17. GRB 070125: Break in Optical Decay
  18. GRB 070209: Swift XRT analysis
  19. GRB 070201: clarification on localization and Konus-Wind spectra
  20. GRB070208: optical observations
  21. GRB 070201: IPN constraints and nearby galaxies
  22. GRB 070201: Proximity of IPN annulus to M31
  23. GRB 070208: MARGE Optical Observations
  24. IPN localization of very bright long hard GRB 070207
  25. IPN localization of very intense short GRB 070201
  26. GRB 070209, Swift-BAT refined analysis of the short hard burst
  27. GRB 070209: Swift detection of a short hard burst
  28. GRB 070208: Swift XRT refined analysis
  29. GRB 070208: RAPTOR detection of early afterglow onset
  30. GRB070208: Absorption and emission redshift from Gemini
  31. GRB 070208: MDM Optical Decay
  32. GRB 070208, Swift-BAT refined analysis
  33. GRB070208 - SDSS Pre-Burst Observations
  34. GRB 070208: Early IR detection and afterglow astrometry
  35. GRB 070208: Afterglow confirmation from P60
  36. GRB070208: Faulkes Telescope North Afterglow Identification
  37. GRB 070208: ROTSE-III Optical Limits
  38. GRB 070208: MDM Observations
  39. GRB 070208: Swift detection of a burst
  40. GRB 070125 detection with CARMA
  41. Swift-BAT trigger 259527 is a Cosmic Ray Shower
  42. GRB 070125: Redshift z>~1.54 from Gemini Afterglow Spectrum
  43. GRB 070129: afterglow confirmation
  44. GRB070124: Swift-XRT Follow-up Observation
  45. GRB070126: Swift-XRT Observation
  46. GRB 070125: further AAVSO optical observations
  47. GRB 070129: Swift/UVOT Upper limits
  48. GRB 070129: dust-scattered X-ray halo detected by Swift/XRT
  49. GRB 070125: optical observation
  50. GRB 070125: WSRT Radio Detection
  51. Radio detection of GRB 070125
  52. GRB061217: MAGIC telescope GeV observation
  53. GRB 070125: confirmation of pseudo-redshift
  54. GRB 070129, Swift-BAT refined analysis of a particularly long
  55. GRB 070129: Xinglong TNT optical Upper Limit
  56. GRB 070129: Swift-XRT Refined Analysis
  57. GRB 070129: VLT observations
  58. GRB 070125: An IR Point Source and an Apparent Host Galaxy
  59. GRB 070129: Swift detection of a burst
  60. GRB 070126: Swift/UVOT refined analysis
  61. GRB 070125: further AAVSO optical observations
  62. GRB 070125: MITSuME Okayama optical observation
  63. Konus-Wind observation of GRB 070125
  64. GRB 070125: AAVSO optical observations
  65. GRB 070125: optical observations
  66. GRB 070126: VLT observations
  67. GRB070126: Swift-XRT possible detection of an afterglow
  68. GRB 070125: PROMPT detections
  69. GRB 070124: Suzaku WAM observation of the prompt emissions
  70. GRB 070125: WSRT Radio Observations
  71. GRB 070125: UVOT Detection in Ultraviolet Filters
  72. GRB 070126, Swift-BAT refined analysis of a very faint burst
  73. GRB070125: Optical observation by Kanata
  74. Possible GRB 070126: Swift/UVOT Upper Limit
  75. GRB 070125: UVOT Observations of a Fading Optical Afterglow
  76. GRB 070125: Xinglong TNT optical observations
  77. GRB 070125: Continued P60 Observations
  78. GRB 070125: pseudo-z~1.5 from spectral parameters of the prompt emission
  79. GRB 070125: Keck/LRIS Spectroscopy -- Evidence for a very low redshift
  80. GRB 070125: Lick 3m Spectroscopy
  81. GRB070125: Swift-XRT Refined Analysis
  82. GRB 070125: SARA detection in R
  83. GRB 070125: P60 Optical Afterglow Candidate
  84. GRB 070126?: Swift detection of a possible burst
  85. GRB070125 redshift request
  86. RHESSI Spectrum of GRB070125
  87. IPN-BAT localization of GRB070125 (very long duration, intense)
  88. Konus-Wind observation of short hard GRB 070124
  89. IPN localization of GRB070124 (short duration, hard spectrum)
  90. GRB 070110: optical break
  91. GRB 070110: Continued Detection and Request for Ground Followup
  92. GRB 050904: Second Epoch of HST/NICMOS Observations
  93. GRB 070110: Ep,i - Eiso correlation
  94. GRB 070107: Suzaku WAM observation of the prompt emission
  95. GRB 070110: VLT R-band photometry
  96. GRB 070110 declared a "Burst of Interest" by Swift team
  97. Further Retractions of previous Swift-BAT triggers
  98. Swift-BAT Trigger 255685 is not a GRB
  99. Trigger 255685: Swift detection of a possible burst
  100. GRB 070110: VLT absorption redshift

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