ASTROSAT CZTI

Data Quality Report

Orbit 58641

Creation date: 2026-07-30T20:09:51.227746
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_004T06_9000006594_58641cztM0_level2.fits modeM0/AS1A14_004T06_9000006594_58641cztM0_level2_quad_clean.evt
Size (bytes)567,852,480100,339,200
Size541.5 MB 95.7 MB
Events in quadrant A5,655,155655,370
Events in quadrant B4,182,642726,038
Events in quadrant C4,096,789636,458
Events in quadrant D6,557,911546,322

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0213052
B0169285
C0168832
D0241892

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68004867.147059%
B68002012.955882%
C68003204.705882%
D6800101514.926471%

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 7805 6800 319 319 4.09% 4.69%
B 7805 6800 68 68 0.87% 1.00%
C 7805 6800 180 180 2.31% 2.65%
D 7804 6799 772 772 9.89% 11.35%

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 12 114 2393929 12602.46 767 746 189.9
A 10 17 91021 475.39 767 746 189.9
A 13 248 86873 453.54 767 746 189.9
B 2 249 283752 1734.29 762 733 163.2
B 8 234 213251 1302.27 762 733 163.2
B 8 128 179569 1095.87 762 733 163.2
C 15 217 466196 2278.89 744 738 204.2
C 15 164 398941 1949.61 744 738 204.2
C 12 252 121902 593.22 744 738 204.2
D 2 249 2086299 10379.58 713 683 200.9
D 8 240 888438 4418.13 713 683 200.9
D 7 222 331175 1644.77 713 683 200.9

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