ASTROSAT CZTI

Data Quality Report

Orbit 31481

Creation date: 2024-06-27T20:29:04.112922
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/AS1T04_028T01_9000004584_31481cztM0_level2.evt modeM0/AS1T04_028T01_9000004584_31481cztM0_level2_quad_clean.evt
Size (bytes)1,477,031,040201,142,080
Size1.4 GB 191.8 MB
Events in quadrant A7,779,0941,328,445
Events in quadrant B16,970,7591,162,716
Events in quadrant C8,769,6931,262,824
Events in quadrant D10,117,6121,216,758

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03300
B03300
C03300
D03300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0336583
B0619633
C0364033
D0410073

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0330
B0330
C0330
D0330

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A16245770.473992%
B16246261616.102425%
C162464032.480611%
D162463502.154376%

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 19485 16247 2 2 0.01% 0.01%
B 19486 16247 1872 1872 9.61% 11.52%
C 19486 16248 200 200 1.03% 1.23%
D 19486 16247 293 293 1.50% 1.80%

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 96424 237.27 1990 1952 398.2
A 13 254 30131 70.77 1990 1952 398.2
A 3 137 20423 46.39 1990 1952 398.2
B 12 1 5498152 16024.1 1796 1751 343.0
B 6 159 4147610 12086.76 1796 1751 343.0
B 4 80 112907 324.06 1796 1751 343.0
C 0 10 646345 1447.43 1891 1903 445.2
C 3 233 387255 865.51 1891 1903 445.2
C 14 238 304293 679.18 1891 1903 445.2
D 8 195 1389070 3047.62 1895 1845 455.2
D 12 218 743409 1629.16 1895 1845 455.2
D 13 249 340870 744.81 1895 1845 455.2

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