ASTROSAT CZTI

Data Quality Report

Orbit 51266

Creation date: 2025-03-21T11:44:24.922728
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/AS1C07_001T01_9000006454_51266cztM0_level2.fits modeM0/AS1C07_001T01_9000006454_51266cztM0_level2_quad_clean.evt
Size (bytes)925,594,56093,830,400
Size882.7 MB 89.5 MB
Events in quadrant A7,440,141676,850
Events in quadrant B4,924,378730,294
Events in quadrant C15,533,866280,612
Events in quadrant D5,776,480624,095

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0274911
B0201171
C0512991
D0226291

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01540
B01540
C01540
D01540

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B010
C010
D010

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A76034195.510983%
B76035517.247139%
C7604476562.664387%
D76043995.247238%

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 7718 7605 287 287 3.72% 3.77%
B 7718 7605 314 314 4.07% 4.13%
C 7719 7604 4648 4648 60.22% 61.13%
D 7719 7606 359 359 4.65% 4.72%

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 2367964 12083.59 789 766 195.9
A 12 80 690383 3520.22 789 766 195.9
A 12 250 511081 2604.95 789 766 195.9
B 12 32 1049930 6255.86 783 754 167.7
B 8 128 225893 1342.42 783 754 167.7
B 7 252 95348 564.03 783 754 167.7
C 4 12 12260653 96721.47 451 446 126.8
C 1 243 453923 3577.51 451 446 126.8
C 10 171 388385 3060.47 451 446 126.8
D 2 216 916255 4325.47 757 729 211.7
D 3 12 813430 3839.66 757 729 211.7
D 8 176 545905 2575.72 757 729 211.7

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