ASTROSAT CZTI

Data Quality Report

Orbit 54275

Creation date: 2025-10-10T02:29:45.302596
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/AS1A14_126T15_9000006516_54275cztM0_level2.fits modeM0/AS1A14_126T15_9000006516_54275cztM0_level2_quad_clean.evt
Size (bytes)525,582,720118,465,920
Size501.2 MB 113.0 MB
Events in quadrant A4,177,968788,834
Events in quadrant B4,594,083819,046
Events in quadrant C4,631,655723,908
Events in quadrant D5,410,657681,910

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01640
B01640
C01640
D01640

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0182353
B0195192
C0198310
D0218320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8254390.472498%
B82552513.040581%
C82562573.112888%
D82562713.282461%

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 8256 8255 37 37 0.45% 0.45%
B 8255 8255 198 198 2.40% 2.40%
C 8256 8256 206 206 2.50% 2.50%
D 8256 8256 264 264 3.20% 3.20%

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 4 5 265427 1211.6 879 858 218.4
A 0 8 126536 575.55 879 858 218.4
A 11 3 117338 533.42 879 858 218.4
B 5 185 438750 2385.31 859 828 183.6
B 5 172 302968 1645.72 859 828 183.6
B 0 213 138276 748.66 859 828 183.6
C 1 29 378241 1654.05 843 836 228.2
C 12 249 275754 1204.88 843 836 228.2
C 4 5 188281 821.51 843 836 228.2
D 3 12 1280029 5333.55 848 809 239.8
D 8 176 181350 752.74 848 809 239.8
D 10 181 150312 623.33 848 809 239.8

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