ASTROSAT CZTI

Data Quality Report

Orbit 51707

Creation date: 2025-04-22T12:01:18.451666
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/AS1A13_031T01_9000006462_51707cztM0_level2.fits modeM0/AS1A13_031T01_9000006462_51707cztM0_level2_quad_clean.evt
Size (bytes)1,515,588,480268,513,920
Size1.4 GB 256.1 MB
Events in quadrant A13,252,6981,784,575
Events in quadrant B15,134,1441,777,257
Events in quadrant C14,288,2341,634,931
Events in quadrant D11,928,8771,596,526

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0527453
B0585313
C0560153
D0495563

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03920
B03920
C03920
D03920

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A193944572.356399%
B1939317939.245604%
C1939414257.347633%
D193945903.042178%

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 20554 19397 215 215 1.05% 1.11%
B 20553 19396 1037 1037 5.05% 5.35%
C 20554 19396 1078 1078 5.24% 5.56%
D 20554 19397 434 434 2.11% 2.24%

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 1280876 2519.17 2065 2017 507.7
A 9 191 1068785 2101.38 2065 2017 507.7
A 3 14 1066419 2096.72 2065 2017 507.7
B 8 128 2871220 6742.85 2004 1935 425.5
B 1 223 1568859 3682.29 2004 1935 425.5
B 12 32 1161229 2724.35 2004 1935 425.5
C 15 147 1548969 2866.3 1992 1974 539.7
C 13 3 1228073 2271.74 1992 1974 539.7
C 12 254 860923 1591.47 1992 1974 539.7
D 3 12 1233087 2190.54 2005 1936 562.0
D 7 60 1020756 1812.75 2005 1936 562.0
D 15 98 349158 617.8 2005 1936 562.0

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