ASTROSAT CZTI

Data Quality Report

Orbit 51887

Creation date: 2025-05-02T07:34:33.962234
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_51887cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51887cztM0_level2_quad_clean.evt
Size (bytes)836,841,60087,744,960
Size798.1 MB 83.7 MB
Events in quadrant A6,002,806635,049
Events in quadrant B5,890,415703,831
Events in quadrant C4,601,165632,794
Events in quadrant D13,954,782209,610

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0226492
B0222242
C0184352
D0461622

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0150
C0150
D0150

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68233214.704675%
B68233264.777957%
C68232613.825297%
D6823467668.532903%

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 7943 6824 202 202 2.54% 2.96%
B 7943 6824 167 167 2.10% 2.45%
C 7943 6824 141 141 1.78% 2.07%
D 7943 6821 3781 3781 47.60% 55.43%

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 1483805 8447.74 703 685 175.6
A 4 175 481435 2738.32 703 685 175.6
A 11 3 294889 1675.76 703 685 175.6
B 10 254 1566645 10465.8 710 687 149.6
B 0 172 306994 2047.15 710 687 149.6
B 4 170 282018 1880.23 710 687 149.6
C 14 245 356757 1861.14 697 694 191.3
C 13 3 228231 1189.34 697 694 191.3
C 15 178 157395 819.08 697 694 191.3
D 11 129 8096449 70659.3 400 384 114.6
D 6 42 1332930 11629.94 400 384 114.6
D 12 17 865792 7552.94 400 384 114.6

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