ASTROSAT CZTI

Data Quality Report

Orbit 20180717_G08_035T01_9000002234_level2

Creation date: 2025-11-23T13:56:21.131446
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/AS1G08_035T01_9000002234cztM0_level2.fits modeM0/AS1G08_035T01_9000002234cztM0_level2_quad_clean.evt
Size (bytes)166,201,920148,628,160
Size158.5 MB 141.7 MB
Events in quadrant A999,238851,809
Events in quadrant B963,882843,923
Events in quadrant C990,196823,023
Events in quadrant D856,974758,487

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0432950
B0396620
C0394590
D0393360

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03680
B03680
C03680
D03680

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0310
B0310
C0310
D0310

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A177292211.246545%
B177293762.120819%
C177291510.851712%
D177293311.866998%

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 21070 17727 0 0 0.00% 0.00%
B 21070 17704 0 0 0.00% 0.00%
C 21070 17728 0 0 0.00% 0.00%
D 21070 17727 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 0 29 1014 11.5 260 243 67.0
A 0 30 796 8.25 260 243 67.0
A 7 110 781 8.03 260 243 67.0
B 2 9 856 11.5 254 242 53.4
B 5 128 687 8.33 254 242 53.4
B 3 17 659 7.81 254 242 53.4
C 7 111 709 6.8 261 243 68.5
C 12 241 704 6.73 261 243 68.5
C 2 191 676 6.32 261 243 68.5
D 6 231 644 6.22 245 223 67.7
D 15 46 619 5.85 245 223 67.7
D 6 67 616 5.81 245 223 67.7

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