ASTROSAT CZTI

Data Quality Report

Orbit 26638

Creation date: 2024-06-27T19:31:16.674251
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/AS1A09_145T01_9000003848_26638cztM0_level2.evt modeM0/AS1A09_145T01_9000003848_26638cztM0_level2_quad_clean.evt
Size (bytes)1,515,551,040243,584,640
Size1.4 GB 232.3 MB
Events in quadrant A9,839,9291,591,163
Events in quadrant B10,927,7611,599,658
Events in quadrant C9,481,0621,547,508
Events in quadrant D14,489,4041,451,666

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0396360
B0443290
C0382730
D0547580

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0200
C0200
D0200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A172235092.955350%
B172243281.904320%
C172254172.420900%
D1722514108.185776%

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 19184 17227 249 249 1.30% 1.45%
B 19185 17228 33 33 0.17% 0.19%
C 19185 17228 39 39 0.20% 0.23%
D 19185 17228 969 969 5.05% 5.62%

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 13 1322987 3001.52 2206 2172 440.0
A 13 254 29776 62.73 2206 2172 440.0
A 3 137 19591 39.58 2206 2172 440.0
B 0 189 1695532 4104.86 2190 2139 412.5
B 3 112 430732 1038.93 2190 2139 412.5
B 10 245 106834 253.79 2190 2139 412.5
C 2 16 499153 993.63 2122 2146 500.2
C 14 238 340037 675.52 2122 2146 500.2
C 3 233 275451 546.4 2122 2146 500.2
D 1 52 3044878 5681.27 2077 2035 535.6
D 7 80 2444633 4560.55 2077 2035 535.6
D 2 250 748579 1393.87 2077 2035 535.6

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