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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"

32687 results found.

  1. GRB 070201: clarification on localization and Konus-Wind spectra
  2. GRB070208: optical observations
  3. GRB 070201: IPN constraints and nearby galaxies
  4. GRB 070201: Proximity of IPN annulus to M31
  5. GRB 070208: MARGE Optical Observations
  6. GRB 070209, Swift-BAT refined analysis of the short hard burst
  7. GRB 070208: Swift XRT refined analysis
  8. GRB 070208: RAPTOR detection of early afterglow onset
  9. GRB070208: Absorption and emission redshift from Gemini
  10. GRB 070208: MDM Optical Decay
  11. GRB 070208, Swift-BAT refined analysis
  12. GRB070208 - SDSS Pre-Burst Observations
  13. GRB 070208: Early IR detection and afterglow astrometry
  14. GRB 070208: Afterglow confirmation from P60
  15. GRB070208: Faulkes Telescope North Afterglow Identification
  16. GRB 070208: ROTSE-III Optical Limits
  17. GRB 070208: MDM Observations
  18. GRB 070125 detection with CARMA
  19. GRB 070125: Redshift z>~1.54 from Gemini Afterglow Spectrum
  20. GRB 070129: afterglow confirmation
  21. GRB070124: Swift-XRT Follow-up Observation
  22. GRB070126: Swift-XRT Observation
  23. GRB 070125: further AAVSO optical observations
  24. GRB 070129: Swift/UVOT Upper limits
  25. GRB 070129: dust-scattered X-ray halo detected by Swift/XRT
  26. GRB 070125: optical observation
  27. GRB 070125: WSRT Radio Detection
  28. GRB070129: MITSuME optical observation
  29. Radio detection of GRB 070125
  30. GRB061217: MAGIC telescope GeV observation
  31. GRB 070129, Swift-BAT refined analysis of a particularly long
  32. GRB 070129: Xinglong TNT optical Upper Limit
  33. GRB 070129: Swift-XRT Refined Analysis
  34. GRB 070129: VLT observations
  35. GRB 070125: An IR Point Source and an Apparent Host Galaxy
  36. GRB 070126: Swift/UVOT refined analysis
  37. GRB 070125: further AAVSO optical observations
  38. GRB 070125: MITSuME Okayama optical observation
  39. Konus-Wind observation of GRB 070125
  40. GRB 070125: AAVSO optical observations
  41. GRB 070125: optical observations
  42. GRB 070126: VLT observations
  43. GRB070126: Swift-XRT possible detection of an afterglow
  44. GRB 070125: PROMPT detections
  45. GRB 070124: Suzaku WAM observation of the prompt emissions
  46. GRB 070125: WSRT Radio Observations
  47. GRB 070125: UVOT Detection in Ultraviolet Filters
  48. GRB 070126, Swift-BAT refined analysis of a very faint burst
  49. GRB070125: Optical observation by Kanata
  50. GRB070124: Swift-XRT Observation
  51. Possible GRB 070126: Swift/UVOT Upper Limit
  52. GRB 070125: UVOT Observations of a Fading Optical Afterglow
  53. GRB 070125: Continued P60 Observations
  54. GRB 070125: Keck/LRIS Spectroscopy -- Evidence for a very low redshift
  55. GRB 070125: Lick 3m Spectroscopy
  56. GRB070125: Swift-XRT Refined Analysis
  57. GRB 070125: SARA detection in R
  58. GRB 070125: P60 Optical Afterglow Candidate
  59. RHESSI Spectrum of GRB070125
  60. Konus-Wind observation of short hard GRB 070124
  61. GRB 070110: optical break
  62. Swift-BAT trigger 257213 is a Galactic Center transient
  63. GRB 070110: Continued Detection and Request for Ground Followup
  64. GRB 070110: Ep,i - Eiso correlation
  65. GRB 070107: Suzaku WAM observation of the prompt emission
  66. GRB 070110: VLT R-band photometry
  67. GRB 070110 declared a "Burst of Interest" by Swift team
  68. Further Retractions of previous Swift-BAT triggers
  69. GRB 070110: VLT absorption redshift
  70. GRB 070110: UVOT Observations of a Candidate Afterglow
  71. GRB070110: Swift XRT Team refined analysis
  72. GRB 070110, Swift-BAT refined analysis
  73. GRB070107 Swift/UVOT Observations of a Fading Optical Afterglow
  74. GRB070107: Swift/XRT refined analysis
  75. GRB 070107: Possible UVOT Afterglow
  76. GRB 070107, Swift-BAT refined analysis
  77. GRB 070107: Swift/XRT position
  78. VLA observation of GRB 061222B
  79. VLA detection of GRB 061222A
  80. GRB070103: APO SPIcam i' and z' limits
  81. GRB 061201: Nearby Galaxy Cluster Abell 995 is at z=0.0865
  82. GRB070103: KPNO 4m+FLAMINGOS J limit
  83. GRB 070103: Swift/UVOT Upper limits
  84. GRB070103: Swift XRT refined analysis
  85. GRB 070103, Swift-BAT refined analysis
  86. GRB 070103: NOT observations
  87. Retractions of previous Swift-BAT triggers
  88. GRB061222a: optical observations
  89. Konus-Wind observation of GRB 061222A
  90. GRB 061210: Swift/XRT Astrometry Correction
  91. GRB 050826: MDM Redshift
  92. GRB 061222B: TAROT La Silla observatory early optical observations
  93. GRB 061218: TAROT La Silla observatory early optical observations
  94. GRB 061222A: MITSuME Akeno optical upper limits
  95. GRB 061222A: Confirmation of Gemini Afterglow Candidate
  96. GRB 061222B: MITSuME Akeno optical upper limits
  97. GRB 061222A: Gemini Afterglow Candidate
  98. GRB 061222B, Swift-BAT refined analysis
  99. GRB061222A Swift/UVOT: Upper Limits
  100. GRB 061222B: Swift/UVOT Upper limits

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