ASTROSAT CZTI

Data Quality Report

Orbit 51877

Creation date: 2025-05-01T17:27:30.541239
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/AS1C09_011T05_9000006466_51877cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51877cztM0_level2_quad_clean.evt
Size (bytes)3,009,228,480363,954,240
Size2.8 GB 347.1 MB
Events in quadrant A26,947,5252,505,753
Events in quadrant B24,012,6112,668,459
Events in quadrant C15,817,8072,537,782
Events in quadrant D42,445,9981,370,187

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05700
B05700
C05700
D05700

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0997934
B0909554
C0677194
D01456694

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0310
B0310
C0310
D0310

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A2815819356.871937%
B28159289710.288007%
C281595441.931887%
D281591083338.470826%

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 31178 28158 1182 1182 3.79% 4.20%
B 31179 28159 1883 1883 6.04% 6.69%
C 31179 28159 334 334 1.07% 1.19%
D 31179 28158 9412 9412 30.19% 33.43%

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 12 3 5398988 7460.16 2905 2825 723.3
A 4 175 3703834 5116.62 2905 2825 723.3
A 11 3 1715764 2368.13 2905 2825 723.3
B 4 170 6848350 11452.27 2844 2743 597.8
B 12 32 1307389 2182.59 2844 2743 597.8
B 10 44 586590 976.74 2844 2743 597.8
C 15 192 860299 1093.82 2850 2818 783.9
C 13 3 838909 1066.53 2850 2818 783.9
C 15 178 705788 896.72 2850 2818 783.9
D 11 129 24438200 39033.57 2252 2167 626.0
D 6 42 3579947 5715.07 2252 2167 626.0
D 8 176 2355547 3759.24 2252 2167 626.0

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