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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"

36196 results found.

  1. GRB 070208: Swift detection of a burst
  2. GRB 070125 detection with CARMA
  3. Swift-BAT trigger 259527 is a Cosmic Ray Shower
  4. GRB 070125: Redshift z>~1.54 from Gemini Afterglow Spectrum
  5. GRB 070129: afterglow confirmation
  6. GRB070124: Swift-XRT Follow-up Observation
  7. GRB070126: Swift-XRT Observation
  8. GRB 070125: further AAVSO optical observations
  9. GRB 070129: Swift/UVOT Upper limits
  10. GRB 070129: dust-scattered X-ray halo detected by Swift/XRT
  11. GRB 070125: optical observation
  12. GRB 070125: WSRT Radio Detection
  13. Radio detection of GRB 070125
  14. GRB061217: MAGIC telescope GeV observation
  15. GRB 070125: confirmation of pseudo-redshift
  16. GRB 070129, Swift-BAT refined analysis of a particularly long
  17. GRB 070129: Xinglong TNT optical Upper Limit
  18. GRB 070129: Swift-XRT Refined Analysis
  19. GRB 070129: VLT observations
  20. GRB 070125: An IR Point Source and an Apparent Host Galaxy
  21. GRB 070129: Swift detection of a burst
  22. GRB 070126: Swift/UVOT refined analysis
  23. GRB 070125: further AAVSO optical observations
  24. GRB 070125: MITSuME Okayama optical observation
  25. Konus-Wind observation of GRB 070125
  26. GRB 070125: AAVSO optical observations
  27. GRB 070125: optical observations
  28. GRB 070126: VLT observations
  29. GRB070126: Swift-XRT possible detection of an afterglow
  30. GRB 070125: PROMPT detections
  31. GRB 070124: Suzaku WAM observation of the prompt emissions
  32. GRB 070125: WSRT Radio Observations
  33. GRB 070125: UVOT Detection in Ultraviolet Filters
  34. GRB 070126, Swift-BAT refined analysis of a very faint burst
  35. GRB070125: Optical observation by Kanata
  36. Possible GRB 070126: Swift/UVOT Upper Limit
  37. GRB 070125: UVOT Observations of a Fading Optical Afterglow
  38. GRB 070125: Xinglong TNT optical observations
  39. GRB 070125: Continued P60 Observations
  40. GRB 070125: pseudo-z~1.5 from spectral parameters of the prompt emission
  41. GRB 070125: Keck/LRIS Spectroscopy -- Evidence for a very low redshift
  42. GRB 070125: Lick 3m Spectroscopy
  43. GRB070125: Swift-XRT Refined Analysis
  44. GRB 070125: SARA detection in R
  45. GRB 070125: P60 Optical Afterglow Candidate
  46. GRB 070126?: Swift detection of a possible burst
  47. GRB070125 redshift request
  48. RHESSI Spectrum of GRB070125
  49. IPN-BAT localization of GRB070125 (very long duration, intense)
  50. Konus-Wind observation of short hard GRB 070124
  51. IPN localization of GRB070124 (short duration, hard spectrum)
  52. GRB 070110: optical break
  53. GRB 070110: Continued Detection and Request for Ground Followup
  54. GRB 050904: Second Epoch of HST/NICMOS Observations
  55. GRB 070110: Ep,i - Eiso correlation
  56. GRB 070107: Suzaku WAM observation of the prompt emission
  57. GRB 070110: VLT R-band photometry
  58. GRB 070110 declared a "Burst of Interest" by Swift team
  59. Further Retractions of previous Swift-BAT triggers
  60. Swift-BAT Trigger 255685 is not a GRB
  61. Trigger 255685: Swift detection of a possible burst
  62. GRB 070110: VLT absorption redshift
  63. GRB 070110: UVOT Observations of a Candidate Afterglow
  64. GRB 070110, Swift-BAT refined analysis
  65. GRB070107 Swift/UVOT Observations of a Fading Optical Afterglow
  66. GRB 070110: Swift detection of a burst with a possible optical afterglow
  67. IBAS Alert n. 4047: Not a GRB
  68. GRB070107: Swift/XRT refined analysis
  69. GRB 070107: Possible UVOT Afterglow
  70. GRB 070107, Swift-BAT refined analysis
  71. GRB 070107: Swift/XRT position
  72. GRB 070107: Swift detection of a burst
  73. VLA observation of GRB 061222B
  74. VLA detection of GRB 061222A
  75. GRB 061201: Nearby Galaxy Cluster Abell 995 is at z=0.0865
  76. GRB070103: KPNO 4m+FLAMINGOS J limit
  77. GRB 070103: Swift/UVOT Upper limits
  78. GRB 070103, Swift-BAT refined analysis
  79. GRB 070103: NOT observations
  80. GRB 070103: TAROT Calern observatory optical observations
  81. GRB 070103: Swift detection of a burst
  82. Retractions of previous Swift-BAT triggers
  83. GRB061222a: optical observations
  84. erratum : SDSS Pre-burst Observations of GRB061126
  85. Konus-Wind observation of GRB 061222A
  86. GRB 061210: Swift/XRT Astrometry Correction
  87. GRB 050826: MDM Redshift
  88. GRB 061222B: TAROT La Silla observatory early optical observations
  89. GRB 061218: TAROT La Silla observatory early optical observations
  90. GRB 061222A: MITSuME Akeno optical upper limits
  91. GRB 061222A: Confirmation of Gemini Afterglow Candidate
  92. GRB 061222B: MITSuME Akeno optical upper limits
  93. GRB 061222A: Xinglong Optical Limit
  94. GRB 061222A: Gemini Afterglow Candidate
  95. GRB 061222B, Swift-BAT refined analysis
  96. GRB061222A Swift/UVOT: Upper Limits
  97. GRB 061222B: Swift/UVOT Upper limits
  98. GRB 061222B: Observation with the KANATA 1.5m telescope
  99. GRB061222B: Swift-XRT Refined Analysis
  100. GRB 061222A: Observation with the KANATA 1.5m telescope

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