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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. 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').
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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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

24385 results found.

  1. GRB 070223: Optical Observations
  2. GRB 070227, Swift-BAT refined analysis
  3. GRB 920925C: optical afterglow candidate
  4. IBAS Alert n. 4144: not a GRB
  5. GRB 070224, Swift-BAT refined analysis
  6. GRB 070224: MASTER-Net refind analysis
  7. GRB 070224: MASTER-VWF-Kislovodsk observations
  8. GRB 070224: MASTER observations
  9. GRB 070223: Optical observations
  10. RHESSI Spectrum of GRB070220
  11. GRB 070223: Optical-IR observation with KANATA
  12. GRB 070223, Swift-BAT refined analysis
  13. GRB070223: MASTER-VWF-Kislovodsk observations
  14. GRB 070223: Liverpool Telescope Possible Afterglow Candidate
  15. GRB070223: Swift burst
  16. Konus-Wind and Konus-A observations of GRB 070220
  17. GRB 070220: MITSuME Okayama Optical Observation
  18. GRB 070220 Swift-BAT Refined Analysis
  19. GRB 070220: Swift-XRT Refined Analysis
  20. GRB 070220: Observation with the KANATA 1.5m telescope
  21. GRB 070220 : Faulkes Telescope North optical limit
  22. GRB070219: MASTER-VWF-Kislovodsk observations
  23. GRB 070219: XRT Refined Analysis
  24. GRB 070219, Swift-BAT refined analysis
  25. GRB 070219: Liverpool Telescope Observations
  26. GRB 070219: ROTSE-III Optical Limits
  27. GRB 060927: PROMPT Observations
  28. GRB 070125: Break in Optical Decay
  29. GRB 070209: Swift XRT analysis
  30. GRB 070201: clarification on localization and Konus-Wind spectra
  31. GRB 070201: Proximity of IPN annulus to M31
  32. GRB 070208: MARGE Optical Observations
  33. IPN localization of very bright long hard GRB 070207
  34. IPN localization of very intense short GRB 070201
  35. GRB 070209, Swift-BAT refined analysis of the short hard burst
  36. GRB 070208: RAPTOR detection of early afterglow onset
  37. GRB 070208: MDM Optical Decay
  38. GRB 070208, Swift-BAT refined analysis
  39. GRB 070208: Afterglow confirmation from P60
  40. GRB070208: Faulkes Telescope North Afterglow Identification
  41. GRB 070208: ROTSE-III Optical Limits
  42. GRB 070208: MDM Observations
  43. GRB 070125 detection with CARMA
  44. GRB 070125: Redshift z>~1.54 from Gemini Afterglow Spectrum
  45. GRB 070129: afterglow confirmation
  46. GRB 070129: dust-scattered X-ray halo detected by Swift/XRT
  47. GRB 070125: optical observation
  48. GRB070129: MITSuME optical observation
  49. GRB061217: MAGIC telescope GeV observation
  50. GRB 070129, Swift-BAT refined analysis of a particularly long
  51. GRB 070125: MITSuME Okayama optical observation
  52. Konus-Wind observation of GRB 070125
  53. GRB070126: Swift-XRT possible detection of an afterglow
  54. GRB 070125: PROMPT detections
  55. GRB 070124: Suzaku WAM observation of the prompt emissions
  56. GRB 070126, Swift-BAT refined analysis of a very faint burst
  57. GRB070125: Optical observation by Kanata
  58. GRB 070126?: Swift detection of a possible burst
  59. RHESSI Spectrum of GRB070125
  60. IPN-BAT localization of GRB070125 (very long duration, intense)
  61. Konus-Wind observation of short hard GRB 070124
  62. IPN localization of GRB070124 (short duration, hard spectrum)
  63. GRB 070110: optical break
  64. GRB 070110: Continued Detection and Request for Ground Followup
  65. GRB 070107: Suzaku WAM observation of the prompt emission
  66. Further Retractions of previous Swift-BAT triggers
  67. Trigger 255685: Swift detection of a possible burst
  68. GRB 070110, Swift-BAT refined analysis
  69. IBAS Alert n. 4047: Not a GRB
  70. GRB 070107, Swift-BAT refined analysis
  71. GRB 070107: Swift detection of a burst
  72. GRB070103: Swift XRT refined analysis
  73. GRB 070103, Swift-BAT refined analysis
  74. Retractions of previous Swift-BAT triggers
  75. erratum : SDSS Pre-burst Observations of GRB061126
  76. GRB 061210: Swift/XRT Astrometry Correction
  77. GRB 061222B: TAROT La Silla observatory early optical observations
  78. GRB 061218: TAROT La Silla observatory early optical observations
  79. GRB 061222A: MITSuME Akeno optical upper limits
  80. GRB 061222B: MITSuME Akeno optical upper limits
  81. GRB 061222B, Swift-BAT refined analysis
  82. GRB 061222B: Observation with the KANATA 1.5m telescope
  83. GRB061222B: Swift-XRT Refined Analysis
  84. GRB 061222A: Observation with the KANATA 1.5m telescope
  85. GRB 061222B: BOOTES-IR optical observations
  86. GRB 061222A, Swift-BAT refined analysis
  87. GRB 061222b, SMARTS optical/IR afterglow observations
  88. GRB 061222A: Prompt ROTSE-III Optical Limits
  89. GRB 061218: TORTOREM optical upper limits
  90. GRB 061218, Swift-BAT refined analysis
  91. GRB 061218, SMARTS optical/IR observations
  92. GRB 061218: REM prompt observations
  93. GRB 061217, SMARTS optical observations
  94. GRB061217 - Swift/XRT refined analysis
  95. GRB 061217, Swift-BAT refined analysis
  96. GRB 061217: REM prompt observations
  97. GRB 061217: ROTSE-III Optical Limits
  98. GRB 061217: Swift detection of a short hard burst
  99. GRB061210: Swift/UVOT observations
  100. GRB 061210 : Faulkes North Telescope optical limit

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