ASTROSAT CZTI

Data Quality Report

Orbit 20151125_P01_161T02_9000000124_level2

Creation date: 2025-10-23T18:40:00.013504
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/AS1P01_161T02_9000000124cztM0_level2.fits modeM0/AS1P01_161T02_9000000124cztM0_level2_quad_clean.evt
Size (bytes)197,104,320207,587,520
Size188.0 MB 198.0 MB
Events in quadrant A1,159,7001,245,966
Events in quadrant B1,141,4021,234,094
Events in quadrant C1,139,3941,176,418
Events in quadrant D974,2361,075,028

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04620
B04620
C04620
D04620

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0950430
B0996700
C0939870
D0971640

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0580
B0580
C0580
D0580

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A22587940.416169%
B22587830.367468%
C22587680.301058%
D225874842.142826%

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 28407 22584 0 0 0.00% 0.00%
B 28407 22584 0 0 0.00% 0.00%
C 28407 22583 0 0 0.00% 0.00%
D 28406 22558 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 1075 11.38 300 282 69.7
A 7 110 993 10.21 300 282 69.7
A 14 188 865 8.37 300 282 69.7
B 2 9 864 10.48 301 288 54.9
B 10 225 748 8.37 301 288 54.9
B 14 254 709 7.66 301 288 54.9
C 12 241 793 6.85 301 280 74.9
C 2 191 765 6.48 301 280 74.9
C 9 242 729 6.0 301 280 74.9
D 6 44 707 6.81 278 256 66.2
D 6 114 704 6.76 278 256 66.2
D 6 231 704 6.76 278 256 66.2

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