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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"

24682 results found.

  1. GRB030429 (=H2695): A Long GRB Localized by the HETE WXM and SXC
  2. XRF030416 (=U10897): An X-Ray Flash Localized by the HETE WXM
  3. GRB030329: RTT150 optical observations and upper limit for a host
  4. GRB030501, optical observation
  5. GRB030501 triangulation (correction to GCN 2194)
  6. GRB030329: RTT150 optical observations and upper limit for a host
  7. GRB 030429: redshift from VLT spectroscopy
  8. GRB030501B triangulation (single error box)
  9. GRB 030329, BVRI photometry
  10. GRB030429: Optical Observations
  11. GRB030501: TAROT candidate afterglow present in archival images
  12. GRB 030429: confirmation of afterglow candidate
  13. GRB 030329 Oprical observations in Rozhen observatory
  14. SNeIa AS THE POSSIBLE PROGENITORS OF SHORT-DURATION GRBs.
  15. IPN triangulation of GRB030425 (single error box)
  16. GRB 030329, the review of the sky area in plate archive (1950-1998)
  17. GRB 030329: optical spectropolarimetry at VLT
  18. GRB 030329: wide-field photograph by R. Tamura 1 hr after the burst
  19. GRB030329: optical polarization
  20. IPN triangulation of GRB030422 (two large error boxes)
  21. GRB030329, optical observation
  22. MASTER:optical observations GRB030418
  23. MASTER:optical observations probable GRB030414
  24. GRB030418: Kiso near infrared observations
  25. GRB 030418: Optical afterglow
  26. OT GRB 030329: early UBVRcIc spectral evolution
  27. OT GRB 030329: early spectrum
  28. IPN triangulation of GRB030414 (small error box)
  29. IPN triangulation of GRB030413 (small error box)
  30. Superluminal motion in GRB 030329 (Correction)
  31. Superluminal motion in GRB 030329
  32. GRB030329, optical position
  33. IPN triangulation of GRB030406 (small error box)
  34. IPN triangulation of GRB050403 (small error box)
  35. GRB 030329: BVRI photometry at Asiago
  36. GRB 030329: VLT V-band photometry
  37. Kiso observation of the GRB030329 at April 6
  38. GRB 030329, color evolution
  39. GRB030328, UBVRcIc field photometry
  40. GRB 030329 Optical observations
  41. GRB030329: Kiso B and R band observations
  42. GRB030328: R upper limit after 6 hours by MASTER
  43. SDSS 0.5m PT observations of GRB030329 (correction)
  44. SDSS 0.5m PT observations of GRB030329
  45. GRB030329: final R-band light curve by MASTER
  46. GRB030329, optical observation
  47. GRB030329, new UBVRcIc field photometry
  48. GRB 030329, light curve and SN prediction
  49. GRB 030329, BRI photometry
  50. GRB030328: Full Observation, X-ray Fading and Spectrum Measured
  51. GRB030329: Optical observations at Teramo
  52. GRB 030329: Radio observations at GMRT
  53. Further AAVSO V,B,R observations of GRB030329
  54. GRB 030329: Additional Mt. Laguna Optical Observations
  55. GRB 030329: Observations with ANDICAM
  56. GRB030329: further optical photometry and evidence for a light curve discontinuity
  57. triangulation of GRB 030331 (single error box)
  58. GRB 030329: optical observations
  59. Photometry of GRB030329 - Constant OT Magnitude
  60. GRB030329 - OT brightens
  61. GRB 030329, optical photometry
  62. GRB 030324: Optical and NIR Observations
  63. GRB030329: R band light curve by MASTER
  64. GRB030329 - Light curve flattening
  65. GRB 030324, optical search
  66. GRB 030329, optical observations
  67. GRB030328: X-ray Fading and Spectrum Measured with Chandra
  68. GRB030329a: detection by Konus-Wind
  69. GRB030329b: detection by Konus-Wind and Helicon-CoronasF
  70. GRB030329, BVRcIc field photometry
  71. GRB030329, SPM optical observations
  72. GRB 030329: Optical decay and synthesis
  73. GRB030329 optical observations
  74. GRB 030329: Optical pre-Imaging
  75. GRB 030329: Upper limit from 5.6 hours before trigger
  76. GRB030328: X-ray Afterglow Observed with Chandra
  77. GRB 030329, R-band observations
  78. GRB 030329: OT B and R photometry, decline rate
  79. GRB030329: Upper limits from recent and historical observations.
  80. GRB030329 (=H2652): A Long, Extremely Bright GRB Localized by the HETE WXM and SXC
  81. GRB 030329: Optical Afterglow Observations
  82. GRB 030328: optical observations
  83. GRB 030329: Optical afterglow fading
  84. GRB 030328: OT photometry
  85. GRB030328: optical spectroscopy at TNG
  86. GRB030328: optical photometry at the TNG
  87. VLT spectra of GRB 030328
  88. GRB030328 (=H2650): A Long, Bright GRB Localized by the HETE WXM and SXC
  89. GRB 030328: Optical observations
  90. GRB030324 optical observation
  91. GRB030131, BVRcIc field photometry
  92. Possible GRB030323 localized by INTEGRAL
  93. GRB030323: Detection on 2003/03/24
  94. IPN triangulation of GRB030326 (single small error box)
  95. IPN triangulation of GRB030325 (two small error boxes)
  96. GRB030323: V, R, I photometry
  97. GRB030323 (=H2640): A Faint, Long GRB Localized by the HETE WXM and SXC
  98. GRB030324 (=H2641): A Long GRB Localized in Real Time by the HETE WXM
  99. VLT/FORS2 spectra of GRB 030323
  100. GRB030323, optical observations

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