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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"

28236 results found.

  1. GRB 990123: New Constraints on Possible Foreground Galaxies
  2. GRB990123 Optical Observations
  3. GRB990123, Probability of gravitational lensing
  4. GRB 990123: Detection of the IR Transient, and the Light Curve Fits
  5. GRB990123, Preliminary Lens Search Results
  6. On the Lensing Interpretation of GRB 990123
  7. Search for Potential Images of GRB 990123
  8. Search for Potential Images of GRB 990123
  9. GRB990123, Optical BVRI Observations
  10. GRB 990123: near-infrared observations.
  11. GRB990123, OSSE observations
  12. GRB990123: NIR Observation
  13. GRB990123, ASCA X-ray observation of afterglow
  14. "GRB 990123: New BV Observations"
  15. GRB 990123 Optical Follow-Up
  16. GRB 990123: BATSE Observations
  17. GRB990123 Optical Observations
  18. GRB 990123: New Optical Observations, Decay Measure
  19. GRB 990123 Optical Follow-Up
  20. GRB 990123: Possible Gravitationally Lensed Burst?
  21. GRB990123, optical observation
  22. GRB 990123: Pre-Burst Detection of an Apparent Host Galaxy
  23. GRB990123, Optical observation
  24. GRB 990123: Optical Decay Slope
  25. GRB 990123 r-band photometry
  26. GRB 990123 Optical Follow-up
  27. GRB990123, early optical counterpart detection
  28. GRB990123 Optical Observation
  29. Possible identification of SN1999E with GRB980910
  30. Optical Observations of GRB 981220
  31. GRB 981226: radio variable
  32. GRB981220
  33. GRB981220, Correction to GCN 179
  34. GRB 981220 Optical observations
  35. GRB 981226 Optical Observations
  36. GRB 981220 and GRB 981226, optical observations
  37. GRB981226 Optical Observations
  38. GRB981226 BeppoSAX follow up
  39. GRB 981226
  40. GRB 981226 optical observations
  41. GRB981220 B, R and I band observations
  42. Optical Observations of GRB981226
  43. GRB 981220:Optical Observations
  44. GRB 981226 optical observations
  45. GRB 981220
  46. GRB 981220, radio observations
  47. GRB981220 I-band Observations
  48. GRB 981220
  49. GRB 980326/Host Galaxy
  50. GRB 981220: RXTE/ASM and BeppoSAX/GRBM results
  51. BeppoSAX NFI Observation of GRB980425
  52. GRB980329 R,I flux calibration and R,I,K upper limits
  53. GRB980425 Optical Follow-up
  54. GRB 980923 BATSE Observations
  55. SGR1900+14, BeppoSAX-GRBM observations
  56. GRB970508 optical observations
  57. GRB971214, association with a Galactic star?
  58. GRB980519, Optical Observations
  59. GRB980703 - BeppoSAX/GRBM detection
  60. GRB980703 optical photometry
  61. GRB 980703: BATSE Observations
  62. GRB980703 optical observations
  63. GRB980703: Radio transient
  64. GRB 980703: Spectrum of the proposed optical counterpart
  65. GRB980703 Transient Optical Follow-Up
  66. GRB980703: LOTIS observation at early times
  67. GRB980613 Optical Observations
  68. GRB980703 (I band observations)
  69. BeppoSAX NFI observations of GRB 980703
  70. GRB980519 observation report
  71. GRB980703 optical followup
  72. Radio observations of SGRs
  73. SGR1900+14 field optical observations
  74. GRB980613, optical observations
  75. GRB 980613: Optical transient and its host galaxy
  76. SGR1627-41, RXTE/ASM observations
  77. GRB 980613: Detection of the probable host galaxy
  78. Reduced error box of SGR 1627-41
  79. GRB 980613: BATSE Observations
  80. GRB 980613 Optical Observations
  81. GRB 980613 optical observations
  82. Discovery of a new SGR source, SGR1627-41
  83. GRB980613 Optical Observations
  84. GRB980613 observations from Palomar
  85. GRB 980613 optical/IR obs.
  86. GRB980613 Near Infra-Red Observations
  87. GRB971214 Secondary Standards
  88. GRB980519 Secondary Standards
  89. BATSE on-board GRB trigger change
  90. GRB 980519 Optical Observations
  91. GRB 980519
  92. GRB980519 optical observations
  93. GRB 980519 Optical Observations
  94. GRB980519 BATSE Observations
  95. GRB980519 Optical Observations
  96. GRB980519 Optical Observations
  97. GRB 980519 Optical Observations
  98. GRB980515, BeppoSAX IAUC to be submitted
  99. BSAX Observations of GRB980425 field
  100. IPN web site of GRBs

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