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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"

28235 results found.

  1. GRB 070309: A long GRB detected by INTEGRAL
  2. GRB 070125: X-ray light curve analysis
  3. VLA observation of GRB 070306
  4. GRB 070306: NOT observations
  5. GRB 070306 Swift/UVOT refined analysis
  6. GRB 070306: IR observations and candidate afterglow
  7. GRB 070306, Swift-BAT refined analysis
  8. GRB 070306: XRT Team Refined Analysis
  9. GRB 070306: Optical and IR observations with KANATA
  10. GRB070306 - SDSS Pre-burst Observations
  11. GRB 070306: Swift detection of a burst
  12. GRB070227: Swift-XRT refined analysis
  13. GRB 060605 new redshift
  14. GRB 070125, deep late-time optical observation
  15. VLA observation of GRB 070224
  16. GRB 070227: Swift/UVOT Upper Limits
  17. GRB 070227: TAROT La Silla observatory optical observations
  18. GRB 070227, Swift-BAT refined analysis
  19. GRB 070227: Swift detection of a burst in ground analysis
  20. GRB 070224: Swift/UVOT Upper Limits
  21. VLA observation of GRB 070223
  22. VLA observation of GRB 070220
  23. GRB070224: Magellan Imaging Observations
  24. GRB 070224: WHT K-band imaging
  25. GRB 070224: MDM Observations
  26. GRB070224: Gemini Imaging Observations
  27. GRB 070224: SARA upper limit
  28. GRB070224: Swift-XRT Refined Analysis
  29. GRB 070224: optical afterglow candidate
  30. GRB 070224, Swift-BAT refined analysis
  31. GRB 070224: MASTER-Net refind analysis
  32. GRB 070224: MASTER-VWF-Kislovodsk observations
  33. GRB 070224: Swift detection of a burst
  34. GRB 070223: Optical observations
  35. GRB070223: Swift/UVOT refined analysis
  36. GRB 070223: Optical-IR observation with KANATA
  37. GRB 070223, Swift-BAT refined analysis
  38. GRB070223: MASTER-VWF-Kislovodsk observations
  39. GRB 070223: Swift-XRT Refined Analysis
  40. GRB070223 - SDSS Pre-Burst Observations
  41. GRB 070223: MDM Observations
  42. GRB070223: Swift burst
  43. GRB 070220: MITSuME Okayama Optical Observation
  44. GRB 070220 Swift-BAT Refined Analysis
  45. Swift/UVOT refined analysis of GRB070220
  46. GRB 070209: Swift XRT refined analysis
  47. GRB 070220: Swift-XRT Refined Analysis
  48. GRB 070220: Observation with the KANATA 1.5m telescope
  49. GRB 070219: Gemini Observations
  50. GRB 070220: Swift detection of a burst
  51. GRB070219: MASTER-VWF-Kislovodsk observations
  52. GRB 070219: Swift/UVOT Upper limits
  53. GRB 070219: I-band observations
  54. GRB 070219, Swift-BAT refined analysis
  55. GRB 070219: optical TNG observations
  56. GRB070219 - SDSS Pre-Burst Observations
  57. GRB 070219: Swift detection of a burst
  58. GRB 070125 observations with the GMRT
  59. GRB 070209: Redshift of a galaxy in the error circle of XRT source
  60. GRB 070129: MDM I-band Detection
  61. GRB 070125: Break in Optical Decay
  62. GRB 070209: Swift XRT analysis
  63. GRB 070201: clarification on localization and Konus-Wind spectra
  64. IPN localization of very bright long hard GRB 070207
  65. GRB 070209, Swift-BAT refined analysis of the short hard burst
  66. GRB 070208: Swift XRT refined analysis
  67. GRB 070208, Swift-BAT refined analysis
  68. GRB070208 - SDSS Pre-Burst Observations
  69. GRB 070208: Early IR detection and afterglow astrometry
  70. GRB 070208: Swift detection of a burst
  71. GRB 070125 detection with CARMA
  72. GRB 070125: Redshift z>~1.54 from Gemini Afterglow Spectrum
  73. GRB 070129: afterglow confirmation
  74. GRB070126: Swift-XRT Observation
  75. GRB 070129: Swift/UVOT Upper limits
  76. GRB 070125: optical observation
  77. GRB 070129, Swift-BAT refined analysis of a particularly long
  78. GRB 070129: Xinglong TNT optical Upper Limit
  79. GRB 070129: Swift-XRT Refined Analysis
  80. GRB 070129: VLT observations
  81. GRB 070125: An IR Point Source and an Apparent Host Galaxy
  82. GRB 070129: Swift detection of a burst
  83. GRB 070126: Swift/UVOT refined analysis
  84. GRB 070125: MITSuME Okayama optical observation
  85. GRB 070125: optical observations
  86. GRB 070126: VLT observations
  87. GRB 070124: Suzaku WAM observation of the prompt emissions
  88. GRB 070125: UVOT Detection in Ultraviolet Filters
  89. GRB 070126, Swift-BAT refined analysis of a very faint burst
  90. GRB070125: Optical observation by Kanata
  91. GRB070124: Swift-XRT Observation
  92. Possible GRB 070126: Swift/UVOT Upper Limit
  93. GRB 070125: UVOT Observations of a Fading Optical Afterglow
  94. GRB 070125: Xinglong TNT optical observations
  95. GRB 070125: Keck/LRIS Spectroscopy -- Evidence for a very low redshift
  96. GRB 070125: Lick 3m Spectroscopy
  97. GRB070125: Swift-XRT Refined Analysis
  98. GRB 070125: SARA detection in R
  99. GRB 070125: P60 Optical Afterglow Candidate
  100. GRB 070126?: Swift detection of a possible burst

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