ASTROSAT CZTI

Data Quality Report

Orbit 20170709_A03_077T01_9000001372_level2

Creation date: 2025-11-15T09:56:04.580929
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_077T01_9000001372cztM0_level2.fits modeM0/AS1A03_077T01_9000001372cztM0_level2_quad_clean.evt
Size (bytes)741,507,840639,817,920
Size707.2 MB 610.2 MB
Events in quadrant A4,810,0763,923,084
Events in quadrant B4,635,5753,903,315
Events in quadrant C4,767,4343,802,581
Events in quadrant D2,883,6072,401,387

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01850
B01830
C01650
D01800

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017570
B017920
C017670
D018310

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01694050
B01722610
C01691830
D01502790

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A825526850.829780%
B822898281.006210%
C827785100.616106%
D6127113192.152731%

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 160910 94032 0 0 0.00% 0.00%
B 160908 93685 0 0 0.00% 0.00%
C 160910 94204 0 0 0.00% 0.00%
D 111711 68303 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 4698 11.23 1251 1170 314.1
A 7 110 3954 8.86 1251 1170 314.1
A 0 30 3600 7.73 1251 1170 314.1
B 2 9 3905 11.28 1222 1163 243.1
B 12 226 3094 7.94 1222 1163 243.1
B 14 254 3067 7.83 1222 1163 243.1
C 1 80 3548 7.26 1258 1169 327.5
C 1 81 3438 6.93 1258 1169 327.5
C 12 241 3369 6.72 1258 1169 327.5
D 6 231 2093 6.43 822 754 208.2
D 3 14 2068 6.31 822 754 208.2
D 10 189 1993 5.95 822 754 208.2

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