ASTROSAT CZTI

Data Quality Report

Orbit 20170927_A03_086T01_9000001568_level2

Creation date: 2025-11-17T09:52:36.782317
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/AS1A03_086T01_9000001568cztM0_level2.fits modeM0/AS1A03_086T01_9000001568cztM0_level2_quad_clean.evt
Size (bytes)1,944,725,7601,911,176,640
Size1.8 GB 1.8 GB
Events in quadrant A11,373,86211,008,525
Events in quadrant B11,308,38611,368,924
Events in quadrant C11,888,01611,328,532
Events in quadrant D10,083,5309,951,406

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03170
B03170
C03170
D03170

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A042320
B042380
C042340
D042320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06546910
B05630420
C04330970
D05585990

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A207578207139.978418%
B207651133736.440133%
C20773218350.883350%
D207628100784.853873%

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 242018 207569 0 0 0.00% 0.00%
B 242018 208168 0 0 0.00% 0.00%
C 242018 208285 0 0 0.00% 0.00%
D 242018 207988 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 11789 12.19 2959 2764 740.2
A 0 29 11011 11.14 2959 2764 740.2
A 14 204 9587 9.22 2959 2764 740.2
B 2 9 9677 11.63 2977 2829 588.9
B 3 17 7652 8.19 2977 2829 588.9
B 12 226 7488 7.91 2977 2829 588.9
C 12 241 8208 6.5 3145 2924 813.0
C 2 191 8069 6.33 3145 2924 813.0
C 9 188 7725 5.91 3145 2924 813.0
D 3 14 7262 6.04 2882 2623 767.7
D 6 231 7203 5.97 2882 2623 767.7
D 1 19 7167 5.92 2882 2623 767.7

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