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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"

32563 results found.

  1. XRF 080109 / SN 2008D: 1.4 GHz WSRT Radio Observations
  2. Transient in NGC2770 / SN2008D: Metallicity of nearby HII regions
  3. Transient XRF 080109 / SN 2008D: Mount Abu NIR observations
  4. XRF 080109 / SN 2008D: WSRT Radio Detection
  5. Transient 080109/ SN 2008D, metallicity of the host galaxy
  6. Transient 080109/ SN 2008D, IR Spectrum
  7. XRF 080109 / SN 2008D: optical observations
  8. NGC 2770B has the same redshift as NGC 2770
  9. Swift UVOT Monitoring of the SN 2008D Brightening (Transient in NGC 2770)
  10. XRF 080109 / SN 2008D: spectroscopic evolution
  11. optical observations, XRT in NGC 2770
  12. XRF 080109/SN 2008D: PROMPT Optical Imaging
  13. Gemini-South observations of XRF 080109 / SN 2008D
  14. Swift observations of the X-ray transient in NGC 2770 (aka SN2008D)
  15. Discovery of Radio Emission from Transient in NGC 2770
  16. XRF 080109 in NGC2770: NIR observations at TNG
  17. XRB 080109/SN 2008D: Early decline in brightness and change in colors
  18. XRB 080109/SN 2008D:PAIRITEL NIR observations and t_0 from Swift
  19. XRF 080109 in NGC2770: Detectable Superluminal Motion
  20. Detailed Spectroscopic ID of SN 2008D (Transient in NGC 2770)
  21. XRF in NGC 2770: Search for X-ray periodicity
  22. Refined Swift-XRT analysis of the transient in NGC 2770
  23. Transient in NGC 2770: spectroscopic evidence for a SN
  24. Refined Swift UVOT Analysis of SN 2008D (Transient in NGC 2770)
  25. Opticall follow-ups for the X-ray transient in NGC 2770
  26. X-ray transient in NGC 2770: Optical observations with Astrotel-Caucasus
  27. Early OT detection of XRF in NGC 2770 in Asiago frames
  28. Bright X-ray transient / possible XRF in NGC 2770: TNG R imaging
  29. Possible XRF in NGC 2770 - NOT observations of the optical counterpart
  30. Bright X-ray Transient (a XRF? ) in NGC 2770 - A SN optical counterpart?
  31. GRB 071227: Suzaku WAM observation of the prompt emission
  32. GRB 071227: optical afterglow
  33. Further Swift-BAT analysis of GRB 071227
  34. Konus-Wind observation of GRB 071227
  35. GRB 071227: Magellan redshift confirmation
  36. GRB 071227: Swift-XRT refined analysis
  37. GRB 071227: VLT probable redshift of the candidate host galaxy
  38. GRB 071227: Magellan observations
  39. GRB071227: Swift/UVOT refined analysis
  40. GRB 071227: REM NIR and Optical observations
  41. Swift-BAT refined analysis of short GRB 071227
  42. GRB071020: optical observations
  43. GRB 070429B: Possible UVOT Detection of an Optical Afterglow
  44. Swift-BAT trigger 298308 is not a GRB
  45. GRB 071125: Suzaku WAM observation of the prompt emission
  46. GRB 070429B: Probable host galaxy and redshift
  47. GRB 071129, Swift-BAT refined analysis
  48. Konus-Wind and Konus-A observations of GRB 071125
  49. GRB 071112C: Optical/NIR observations
  50. Disregard the "GRB 071126" position
  51. VLA radio detection of GRB 071122
  52. GRB071122: Swift/UVOT Observations
  53. GRB071104: NIR Afterglow Candidate at TNG
  54. GRB 071122: MASTER optical observation
  55. GRB 071122, Swift-BAT refined analysis
  56. GRB 071122 Swift XRT position update sent in error.
  57. GRB 071122 Swift-XRT refined analysis
  58. GRB 071122: Corrected P60 Coordinates
  59. GRB071122: Gemini Absorption redshift
  60. GRB 071122: P60 Optical Afterglow Candidate
  61. GRB 071122: ROTSE-III Optical Limits
  62. GRB 071118: P60 Observations
  63. GRB071118 MITSuME OAO optical observation
  64. GRB 071118: Observations from OSN
  65. GRB 071117: VLT observations and probable redshift
  66. Swift/UVOT observations of GRB071118
  67. GRB 071117: Swift-XRT revised position
  68. Konus-Wind and Konus-A observations of GRB 071117
  69. Swift XRT follow-up observations of GRB071008
  70. Swift/UVOT upper limits for GRB 071117
  71. GRB071118: Swift XRT refined analysis
  72. GRB 071117: Gemini Optical Afterglow Discovery
  73. GRB 071118, Swift-BAT refined analysis
  74. GRB 071112B: Gemini Image Differencing
  75. GRB 071117: Gemini Observations
  76. GRB 071117: Swift-XRT refined analysis
  77. GRB 071117, Swift-BAT refined analysis
  78. VLT FORS2 observations of short hard GRB071112B
  79. GRB 071117: Swift/XRT position
  80. VLA radio upper limit on GRB 071112C
  81. ATCA radio observations of short hard burst GRB 071112B
  82. GRB 071112C: Optical and NIR data observed with KANATA
  83. Correction to the Swift-BAT Transient Identification (trigger=296683)
  84. GRB 071112C: WSRT Radio Observations
  85. GRB071112C: Errata of MITSuME Ic band photometry
  86. GRB 071112C: optical observation
  87. GRB 071112C: optical observation
  88. GRB 071112C: emission lines and refined VLT redshift
  89. GRB 071112C MITSuME Akeno early optical observation
  90. GRB 071112C: Gemini Absorption Redshift
  91. GRB 071112B: 2nd epoch of Magellan i-band imaging
  92. GRB 071112C: SARA upper limit
  93. GRB 071112C : Second Epoch Lulin R-band observations
  94. GRB071112C MITSuME Okayama Optical Observation
  95. GRB 071112C: Swift-BAT refined analysis
  96. GRB 071112C: Swift/UVOT observations
  97. GRB 071112C: Swift XRT refined analysis
  98. GRB 071112C: Optical observations at Crni Vrh
  99. Swift UVOT upper limits of GRB071112B
  100. GRB 071112C: VLT redshift

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