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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"

25093 results found.

  1. GRB030324: Further Observations of the Candidate Optical Afterglow
  2. GRB030519B (=H2716): Peak Fluxes, Fluences, and Energy Spectrum
  3. IPN triangulation of GRB030519B=H2716 (small error box)
  4. HETE GRB030329, correction to Rc Observations in Loiano
  5. GRB 030329: Optical limit (contemporaneous imaging)
  6. IPN triangulation of GRB030509 (small errror box)
  7. GRB030329, BVRI photometry
  8. GRB030429, refiend optical brightness
  9. GRB 030329: Optical limit (contemporaneous photography)
  10. GRB030418, BVRcIc field photometry
  11. GRB030429, BVRcIc field photometry
  12. GRB030429 (=H2695): A Long GRB Localized by the HETE WXM and SXC
  13. XRF030416 (=U10897): An X-Ray Flash Localized by the HETE WXM
  14. GRB030329: RTT150 optical observations and upper limit for a host
  15. GRB030501, optical observation
  16. GRB030501 triangulation (correction to GCN 2194)
  17. GRB030329: RTT150 optical observations and upper limit for a host
  18. GRB 030429: redshift from VLT spectroscopy
  19. GRB030501B triangulation (single error box)
  20. GRB 030329, BVRI photometry
  21. GRB030429: Optical Observations
  22. GRB030501: TAROT candidate afterglow present in archival images
  23. GRB 030429: confirmation of afterglow candidate
  24. GRB 030329 Oprical observations in Rozhen observatory
  25. SNeIa AS THE POSSIBLE PROGENITORS OF SHORT-DURATION GRBs.
  26. IPN triangulation of GRB030425 (single error box)
  27. GRB 030329, the review of the sky area in plate archive (1950-1998)
  28. GRB 030329: optical spectropolarimetry at VLT
  29. GRB 030329: wide-field photograph by R. Tamura 1 hr after the burst
  30. GRB030329: optical polarization
  31. IPN triangulation of GRB030422 (two large error boxes)
  32. GRB030329, optical observation
  33. MASTER:optical observations GRB030418
  34. MASTER:optical observations probable GRB030414
  35. GRB030418: Kiso near infrared observations
  36. GRB 030418: Optical afterglow
  37. OT GRB 030329: early UBVRcIc spectral evolution
  38. OT GRB 030329: early spectrum
  39. IPN triangulation of GRB030414 (small error box)
  40. IPN triangulation of GRB030413 (small error box)
  41. Superluminal motion in GRB 030329 (Correction)
  42. Superluminal motion in GRB 030329
  43. GRB030329, optical position
  44. IPN triangulation of GRB030406 (small error box)
  45. IPN triangulation of GRB050403 (small error box)
  46. GRB 030329: BVRI photometry at Asiago
  47. GRB 030329: VLT V-band photometry
  48. Kiso observation of the GRB030329 at April 6
  49. GRB 030329, color evolution
  50. GRB030328, UBVRcIc field photometry
  51. GRB 030329 Optical observations
  52. GRB030329: Kiso B and R band observations
  53. GRB030328: R upper limit after 6 hours by MASTER
  54. SDSS 0.5m PT observations of GRB030329 (correction)
  55. SDSS 0.5m PT observations of GRB030329
  56. GRB030329: final R-band light curve by MASTER
  57. GRB030329, optical observation
  58. GRB030329, new UBVRcIc field photometry
  59. GRB 030329, light curve and SN prediction
  60. GRB 030329, BRI photometry
  61. GRB030328: Full Observation, X-ray Fading and Spectrum Measured
  62. GRB030329: Optical observations at Teramo
  63. GRB 030329: Radio observations at GMRT
  64. Further AAVSO V,B,R observations of GRB030329
  65. GRB 030329: Additional Mt. Laguna Optical Observations
  66. GRB 030329: Observations with ANDICAM
  67. GRB030329: further optical photometry and evidence for a light curve discontinuity
  68. triangulation of GRB 030331 (single error box)
  69. GRB 030329: optical observations
  70. Photometry of GRB030329 - Constant OT Magnitude
  71. GRB030329 - OT brightens
  72. GRB 030329, optical photometry
  73. GRB 030324: Optical and NIR Observations
  74. GRB030329: R band light curve by MASTER
  75. GRB030329 - Light curve flattening
  76. GRB 030324, optical search
  77. GRB 030329, optical observations
  78. GRB030328: X-ray Fading and Spectrum Measured with Chandra
  79. GRB030329a: detection by Konus-Wind
  80. GRB030329b: detection by Konus-Wind and Helicon-CoronasF
  81. GRB030329, BVRcIc field photometry
  82. GRB030329, SPM optical observations
  83. GRB 030329: Optical decay and synthesis
  84. GRB030329 optical observations
  85. GRB 030329: Optical pre-Imaging
  86. GRB 030329: Upper limit from 5.6 hours before trigger
  87. GRB030328: X-ray Afterglow Observed with Chandra
  88. GRB 030329, R-band observations
  89. GRB 030329: OT B and R photometry, decline rate
  90. GRB030329: Upper limits from recent and historical observations.
  91. GRB030329 (=H2652): A Long, Extremely Bright GRB Localized by the HETE WXM and SXC
  92. GRB 030329: Optical Afterglow Observations
  93. GRB 030328: optical observations
  94. GRB 030329: Optical afterglow fading
  95. GRB 030328: OT photometry
  96. GRB030328: optical spectroscopy at TNG
  97. GRB030328: optical photometry at the TNG
  98. VLT spectra of GRB 030328
  99. GRB030328 (=H2650): A Long, Bright GRB Localized by the HETE WXM and SXC
  100. GRB 030328: Optical observations

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