ASTROSAT CZTI

Data Quality Report

Orbit 20170819_A03_095T03_9000001474_level2

Creation date: 2025-11-16T19:39:57.236924
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_095T03_9000001474cztM0_level2.fits modeM0/AS1A03_095T03_9000001474cztM0_level2_quad_clean.evt
Size (bytes)317,088,000328,245,120
Size302.4 MB 313.0 MB
Events in quadrant A1,900,9781,978,808
Events in quadrant B1,824,2381,950,786
Events in quadrant C1,871,4921,907,204
Events in quadrant D1,587,3501,685,403

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06940
B06940
C06940
D06940

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0737540
B0763840
C0717650
D0948150

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0270
B0270
C0270
D0270

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A353502010.568600%
B352574201.191253%
C35350790.223479%
D351439712.762997%

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 38534 35588 0 0 0.00% 0.00%
B 38534 35520 0 0 0.00% 0.00%
C 38533 35587 0 0 0.00% 0.00%
D 38534 35323 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 1926 11.65 493 461 125.8
A 0 29 1796 10.62 493 461 125.8
A 14 204 1636 9.34 493 461 125.8
B 2 9 1633 12.24 480 457 96.1
B 3 17 1254 8.29 480 457 96.1
B 14 254 1251 8.26 480 457 96.1
C 12 241 1370 7.02 494 458 130.0
C 2 191 1289 6.39 494 458 130.0
C 9 242 1273 6.27 494 458 130.0
D 3 14 1180 6.23 451 408 124.0
D 1 19 1138 5.89 451 408 124.0
D 7 5 1138 5.89 451 408 124.0

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