ASTROSAT CZTI

Data Quality Report

Orbit 35842

Creation date: 2022-06-08T17:10:00.984370
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/AS1A11_080T01_9000005146_35842cztM0_level2.evt modeM0/AS1A11_080T01_9000005146_35842cztM0_level2_quad_clean.evt
Size (bytes)463,112,64061,879,680
Size441.7 MB 59.0 MB
Events in quadrant A4,092,257382,919
Events in quadrant B3,042,016387,710
Events in quadrant C3,191,469382,653
Events in quadrant D3,359,364368,448

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0280
B0280
C0280
D0290

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01020
B01020
C01020
D01020

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0154773
B0120172
C0121062
D0129772

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A50192745.459255%
B5019490.976290%
C50192174.323570%
D50192014.004782%

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 7171 5020 275 275 3.83% 5.48%
B 7171 5020 17 17 0.24% 0.34%
C 7171 5020 174 174 2.43% 3.47%
D 7171 5020 167 167 2.33% 3.33%

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 15 169 1402042 10696.95 653 644 131.0
A 10 83 153209 1164.54 653 644 131.0
A 13 6 12725 92.21 653 644 131.0
B 4 232 165208 1341.23 652 640 122.7
B 0 213 140641 1141.01 652 640 122.7
B 5 172 90915 735.74 652 640 122.7
C 0 10 486246 3407.3 621 630 142.5
C 15 214 206859 1446.99 621 630 142.5
C 15 208 78583 546.95 621 630 142.5
D 2 250 373696 2394.59 636 621 155.8
D 7 223 309294 1981.22 636 621 155.8
D 13 249 62543 397.45 636 621 155.8

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