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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"

27032 results found.

  1. GRB000630, optical observations
  2. GRB000418, HST/STIS Observations
  3. GRB 990506, HST/STIS Observations of the Host Galaxy
  4. GRB000620, optical observations
  5. GRB000615: H-band observations
  6. GRB990308, HST/STIS observations of the host galaxy
  7. IPN annulus for GRB000620
  8. GRB000620: BeppoSAX WFC and GRBM detection
  9. BeppoSAX ALERT: GRB000620
  10. GRB000620: BeppoSAX Alert
  11. GRB990123, HST/STIS observations of the host galaxy
  12. GRB 990123: Late-time HST/STIS 50CCD observations of the host
  13. GRB000615, further R-band photometry
  14. GRB980425, HST/STIS observations of the host galaxy
  15. GRB000615: BeppoSAX GRB Alert
  16. The Hosts of GRB 980703 and GRB 971214
  17. GRB 000301C: Further Late-Time HST/STIS observations
  18. GRB000528: follow-up X-ray measurements and update of IPN annulus
  19. Optical Follow-up of GRB000529 Error Box
  20. GRB980519, HST/STIS observations of the host galaxy
  21. GRB000607, Radio Observations
  22. BeppoSAX X-ray transient/possible GRB000608
  23. GRB000604 - Optical observations
  24. GRB000604, optical observations
  25. GRB 000604 optical observations
  26. GRB 000418: Detection of the Host Galaxy
  27. GRB000604 [IPN Position]
  28. X-ray Afterglow of GRB 000529
  29. GRB 000528 - WFC measurements
  30. GRB000529: BeppoSAX WFC position
  31. Possible GRB-related phenomenon
  32. RXTE/ASM and IPN localization of GRB 000508B
  33. GRB 000424 Optical Observations
  34. The redshift of GRB 000418
  35. GRB000418, Radio detection
  36. BeppoSAX GRB000424
  37. Correction to IPN error box for GRB000419
  38. GRB000419 [IPN Position]
  39. BATSE observations of FXT/GRB 000416 = 1SAXJ1715.0-7134
  40. GRB000416 BRJK observations
  41. 1SAXJ1715.0-7134 refined position
  42. X-ray burst or X-ray rich GRB 000416 observed by BeppoSAX
  43. GRB 991208, UBVRI field photometry
  44. GRB 000301C: Late-Time HST/STIS CCD Imaging of the field
  45. GRB000326 Optical Observations
  46. GRB000301C - R magnitude lower limit
  47. GRB000326, Further VLA observations
  48. GRB 000323, optical observations
  49. GRB000313, Radio observations
  50. GRB 000313 - optical transient in the BATSE error box
  51. GRB000301C - B and R photometry
  52. GRB000301C - R photometry
  53. GRB 000307, Optical Observations
  54. GRB 000307, BVRI Field Photometry
  55. GRB 000301C: A Precise Redshift Determination
  56. GRB 000301C: HST/STIS-PRISM NUV-MAMA spectroscopy
  57. GRB 000301C: HST/STIS CCD Imaging of the field
  58. GRB 000301c: K' observations
  59. GRB000301C, optical R-band observations
  60. GRB000301c - R photometry and nearby faint source confirmation
  61. GRB 000301c: K' observations
  62. GRB 000301C: K' Observations
  63. GRB000301C - Host galaxy not detected in R (?)
  64. GRB000301C, Radio observations
  65. GRB000301C, Radio observations
  66. GRB000301C optical observations
  67. GRB000301C, near-infrared observations (JHK' imaging)
  68. GRB000301C 250 GHz detection
  69. GRB 000301C, Optical Observation
  70. GRB000301C, near-infrared observations (JHK' photometry)
  71. GRB000301c optical observations
  72. GRB000301c, near-infrared observations
  73. GRB000301C
  74. GRB 000301C : Optical Candidate
  75. GRB000301C: RXTE/ASM and IPN localizations
  76. GRB 000214 ``Valentine's Day Burst'': BeppoSAX NFI Observation
  77. GRB000210, Radio Observations
  78. Correction to GCN 557 (GRB000214: BeppoSAX GRBM and WFC Detection)
  79. GRB000214: BeppoSAX GRBM and WFC Detection
  80. Optical observations of GRB000210
  81. GRB000210 X-ray afterglow
  82. GRB000214: X-ray afterglow candidate
  83. BeppoSAX GRB000214 ("S. Valentine's day GRB")
  84. GRB 000210: BATSE Observations
  85. Correction to Chandra Position of GRB000210 afterglow
  86. Optical observations of the Chandra X-ray source for GRB000210
  87. GRB000210, Radio Observations
  88. Optical candidate for GRB000210
  89. Chandra Observations of GRB000210 X-ray Afterglow
  90. GRB000201, Radio Observations
  91. GRB000210: BeppoSAX GRBM and WFC Detection
  92. Optical observations of GRB000131
  93. GRB000201 Optical Observations
  94. GRB 000201: TAROT optical observations
  95. GRB 000131 Optical Observations
  96. BATSE+IPN location of GRB000131
  97. IPN localization of GRB000131
  98. GRB000126, optical observations
  99. BATSE location of GRB000126
  100. IPN localization of GRB000126

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