ASTROSAT CZTI

Data Quality Report

Orbit 20250817_A14_002T07_9000006498_level2

Creation date: 2025-08-21T12:54:12.449417
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_002T07_9000006498cztM0_level2.fits modeM0/AS1A14_002T07_9000006498cztM0_level2_quad_clean.evt
Size (bytes)1,087,557,120362,802,240
Size1.0 GB 346.0 MB
Events in quadrant A5,992,200309,481
Events in quadrant B6,526,060409,959
Events in quadrant C4,262,014128,007
Events in quadrant D6,293,576344,279

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A028950
B028960
C028960
D028940

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01730
B01740
C01740
D01740

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07605810
B04690250
C09234670
D03419600

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1427445342837.429244%
B1428102114614.807086%
C1427728618160.362676%
D14281636982.589346%

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 165606 142086 0 0 0.00% 0.00%
B 165606 142467 0 0 0.00% 0.00%
C 165606 139581 0 0 0.00% 0.00%
D 165606 142762 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 14 188 6669 9.98 1571 1450 522.8
A 9 255 6232 9.15 1571 1450 522.8
A 14 204 5209 7.19 1571 1450 522.8
B 2 9 7453 14.37 1727 1634 404.8
B 2 8 6695 12.5 1727 1634 404.8
B 3 25 5415 9.34 1727 1634 404.8
C 15 175 3576 6.48 1139 1034 392.3
C 2 31 3290 5.75 1139 1034 392.3
C 12 241 3284 5.74 1139 1034 392.3
D 6 218 7678 10.12 1793 1593 601.6
D 15 11 5836 7.05 1793 1593 601.6
D 3 30 5739 6.89 1793 1593 601.6

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