ASTROSAT CZTI

Data Quality Report

Orbit 56225

Creation date: 2026-02-18T09:35:09.154549
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_083T04_9000006550_56225cztM0_level2.fits modeM0/AS1A14_083T04_9000006550_56225cztM0_level2_quad_clean.evt
Size (bytes)2,057,417,280187,476,480
Size1.9 GB 178.8 MB
Events in quadrant A38,707,695589,688
Events in quadrant B10,955,7221,383,208
Events in quadrant C9,171,1151,273,021
Events in quadrant D15,864,4211,125,104

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03860
B03860
C03860
D03860

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280003
B0462103
C0415553
D0608873

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A189111145460.567923%
B189116043.193908%
C189121680.888325%
D1891118519.787954%

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 20717 19159 11570 11570 55.85% 60.39%
B 20717 19194 351 351 1.69% 1.83%
C 20718 19195 117 117 0.56% 0.61%
D 20717 19194 1912 1912 9.23% 9.96%

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 12 115 13341438 38141.69 1401 1363 349.8
A 15 32 10419799 29788.19 1401 1363 349.8
A 8 176 8284572 23683.19 1401 1363 349.8
B 4 171 579602 1411.62 1939 1867 409.3
B 1 159 429556 1045.0 1939 1867 409.3
B 0 171 420701 1023.36 1939 1867 409.3
C 12 252 811879 1551.6 1905 1886 522.0
C 12 254 422416 805.55 1905 1886 522.0
C 6 223 137804 260.36 1905 1886 522.0
D 8 129 2646194 5106.7 1825 1742 517.8
D 6 239 1551606 2992.94 1825 1742 517.8
D 14 52 1282477 2473.23 1825 1742 517.8

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