ASTROSAT CZTI

Data Quality Report

Orbit 51181

Creation date: 2025-03-17T15:24:08.895723
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/AS1C07_001T01_9000006454_51181cztM0_level2.fits modeM0/AS1C07_001T01_9000006454_51181cztM0_level2_quad_clean.evt
Size (bytes)773,928,000104,258,880
Size738.1 MB 99.4 MB
Events in quadrant A6,039,614695,074
Events in quadrant B5,503,002734,841
Events in quadrant C8,744,965623,460
Events in quadrant D7,761,184563,831

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0232980
B0217090
C0314670
D0284650

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01540
B01540
C01540
D01540

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A77562703.481176%
B77574956.381333%
C7757102413.200980%
D7757113114.580379%

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 7755 7755 160 160 2.06% 2.06%
B 7757 7757 301 301 3.88% 3.88%
C 7757 7757 936 936 12.07% 12.07%
D 7757 7757 1100 1100 14.18% 14.18%

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 726547 3647.4 798 778 199.0
A 9 160 512629 2572.34 798 778 199.0
A 14 254 303238 1520.03 798 778 199.0
B 12 32 699253 4177.03 780 754 167.2
B 10 60 392348 2341.74 780 754 167.2
B 4 171 223566 1332.42 780 754 167.2
C 12 247 2068285 10055.27 743 738 205.6
C 4 12 1186012 5764.44 743 738 205.6
C 4 13 788371 3830.56 743 738 205.6
D 2 62 1611928 7772.76 733 705 207.3
D 7 60 788777 3801.77 733 705 207.3
D 3 12 438227 2110.67 733 705 207.3

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