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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"

43898 results found.

  1. GRB 070125: further AAVSO optical observations
  2. GRB 070129: Swift/UVOT Upper limits
  3. GRB 070129: dust-scattered X-ray halo detected by Swift/XRT
  4. GRB 070125: optical observation
  5. GRB 070125: WSRT Radio Detection
  6. Radio detection of GRB 070125
  7. GRB061217: MAGIC telescope GeV observation
  8. GRB 070125: confirmation of pseudo-redshift
  9. GRB 070129, Swift-BAT refined analysis of a particularly long
  10. GRB 070129: Xinglong TNT optical Upper Limit
  11. GRB 070129: Swift-XRT Refined Analysis
  12. GRB 070129: VLT observations
  13. GRB 070125: An IR Point Source and an Apparent Host Galaxy
  14. GRB 070129: Swift detection of a burst
  15. GRB 070126: Swift/UVOT refined analysis
  16. GRB 070125: further AAVSO optical observations
  17. Konus-Wind observation of GRB 070125
  18. GRB 070125: AAVSO optical observations
  19. GRB 070125: optical observations
  20. GRB 070126: VLT observations
  21. GRB070126: Swift-XRT possible detection of an afterglow
  22. GRB 070125: PROMPT detections
  23. GRB 070124: Suzaku WAM observation of the prompt emissions
  24. GRB 070125: WSRT Radio Observations
  25. GRB 070125: UVOT Detection in Ultraviolet Filters
  26. GRB 070126, Swift-BAT refined analysis of a very faint burst
  27. GRB070125: Optical observation by Kanata
  28. GRB070124: Swift-XRT Observation
  29. Possible GRB 070126: Swift/UVOT Upper Limit
  30. GRB 070125: UVOT Observations of a Fading Optical Afterglow
  31. GRB 070125: Xinglong TNT optical observations
  32. GRB 070125: Continued P60 Observations
  33. GRB 070125: pseudo-z~1.5 from spectral parameters of the prompt emission
  34. GRB 070125: Keck/LRIS Spectroscopy -- Evidence for a very low redshift
  35. GRB 070125: Lick 3m Spectroscopy
  36. GRB070125: Swift-XRT Refined Analysis
  37. GRB 070125: SARA detection in R
  38. GRB 070125: P60 Optical Afterglow Candidate
  39. GRB 070126?: Swift detection of a possible burst
  40. GRB070125 redshift request
  41. RHESSI Spectrum of GRB070125
  42. IPN-BAT localization of GRB070125 (very long duration, intense)
  43. Konus-Wind observation of short hard GRB 070124
  44. IPN localization of GRB070124 (short duration, hard spectrum)
  45. GRB 070110: optical break
  46. Swift-BAT trigger 257213 is a Galactic Center transient
  47. GRB 070110: Continued Detection and Request for Ground Followup
  48. GRB 050904: Second Epoch of HST/NICMOS Observations
  49. GRB 070110: Ep,i - Eiso correlation
  50. GRB 070107: Suzaku WAM observation of the prompt emission
  51. GRB 070110: VLT R-band photometry
  52. GRB 070110 declared a "Burst of Interest" by Swift team
  53. Further Retractions of previous Swift-BAT triggers
  54. Swift-BAT Trigger 255685 is not a GRB
  55. Trigger 255685: Swift detection of a possible burst
  56. GRB 070110: VLT absorption redshift
  57. GRB 070110: UVOT Observations of a Candidate Afterglow
  58. GRB070110: Swift XRT Team refined analysis
  59. GRB 070110, Swift-BAT refined analysis
  60. GRB070107 Swift/UVOT Observations of a Fading Optical Afterglow
  61. GRB 070110: Swift detection of a burst with a possible optical afterglow
  62. IBAS Alert n. 4047: Not a GRB
  63. GRB070107: Swift/XRT refined analysis
  64. GRB 070107: Possible UVOT Afterglow
  65. GRB 070107, Swift-BAT refined analysis
  66. GRB 070107: Swift/XRT position
  67. GRB 070107: Swift detection of a burst
  68. VLA observation of GRB 061222B
  69. VLA detection of GRB 061222A
  70. GRB070103: APO SPIcam i' and z' limits
  71. GRB 061201: Nearby Galaxy Cluster Abell 995 is at z=0.0865
  72. GRB070103: KPNO 4m+FLAMINGOS J limit
  73. GRB 070103: Swift/UVOT Upper limits
  74. GRB070103: Swift XRT refined analysis
  75. GRB 070103, Swift-BAT refined analysis
  76. GRB 070103: TAROT Calern observatory optical observations
  77. GRB 070103: Swift detection of a burst
  78. Retractions of previous Swift-BAT triggers
  79. GRB061222a: optical observations
  80. erratum : SDSS Pre-burst Observations of GRB061126
  81. Konus-Wind observation of GRB 061222A
  82. GRB 061210: Swift/XRT Astrometry Correction
  83. GRB 050826: MDM Redshift
  84. GRB 061222B: TAROT La Silla observatory early optical observations
  85. GRB 061218: TAROT La Silla observatory early optical observations
  86. GRB 061222A: Confirmation of Gemini Afterglow Candidate
  87. GRB 061222A: Xinglong Optical Limit
  88. GRB 061222A: Gemini Afterglow Candidate
  89. GRB 061222B, Swift-BAT refined analysis
  90. GRB 061222B: Observation with the KANATA 1.5m telescope
  91. GRB061222B: Swift-XRT Refined Analysis
  92. GRB 061222A: Observation with the KANATA 1.5m telescope
  93. GRB 061222B: BOOTES-IR optical observations
  94. GRB 061222B: SARA upper limit
  95. GRB 061222A: Swift-XRT refined analysis
  96. GRB 061217: Magellan host galaxy redshift
  97. GRB 061222A, Swift-BAT refined analysis
  98. GRB 061222B: REM NIR/optical observations
  99. GRB 061222b: Refined redshift
  100. GRB 061222b, SMARTS optical/IR afterglow observations

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