ASTROSAT CZTI

Data Quality Report

Orbit 20181201_A05_185T04_9000002548_level2

Creation date: 2025-11-26T03:31:19.633366
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A05_185T04_9000002548cztM0_level2.fits modeM0/AS1A05_185T04_9000002548cztM0_level2_quad_clean.evt
Size (bytes)3,103,099,2002,809,002,240
Size2.9 GB 2.6 GB
Events in quadrant A19,002,88216,601,413
Events in quadrant B18,214,83416,377,519
Events in quadrant C18,312,12015,419,429
Events in quadrant D16,048,09014,276,541

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A066720
B066720
C066720
D066720

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05090
B05090
C05090
D05090

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06759160
B06944930
C07430760
D07860420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A32700134141.044034%
B32700146861.433023%
C32700063131.930581%
D32700094882.901529%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 378427 326988 0 0 0.00% 0.00%
B 378427 326984 0 0 0.00% 0.00%
C 378426 326977 0 0 0.00% 0.00%
D 378426 326920 0 0 0.00% 0.00%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 0 29 17863 10.94 4939 4623 1210.4
A 7 110 15681 9.14 4939 4623 1210.4
A 0 30 14466 8.13 4939 4623 1210.4
B 2 9 14817 10.93 4816 4585 936.3
B 2 8 12682 8.65 4816 4585 936.3
B 3 17 11994 7.91 4816 4585 936.3
C 12 241 12810 6.69 4841 4495 1242.0
C 3 126 12566 6.5 4841 4495 1242.0
C 2 191 12265 6.26 4841 4495 1242.0
D 3 14 12032 6.41 4583 4157 1229.4
D 6 231 11446 5.93 4583 4157 1229.4
D 7 3 11255 5.77 4583 4157 1229.4

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter