ASTROSAT CZTI

Data Quality Report

Orbit 51624

Creation date: 2025-04-15T12:07:39.980386
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_037T05_9000006460_51624cztM0_level2.fits modeM0/AS1A13_037T05_9000006460_51624cztM0_level2_quad_clean.evt
Size (bytes)785,148,480159,503,040
Size748.8 MB 152.1 MB
Events in quadrant A7,793,7921,025,977
Events in quadrant B6,338,5021,137,534
Events in quadrant C5,976,4051,014,230
Events in quadrant D8,109,642896,459

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0210
B0210
C0210
D0210

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0305522
B0262152
C0254252
D0316402

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02220
B02220
C02220
D02220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A109144634.242258%
B109142972.721275%
C109142212.024922%
D109148447.733187%

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 12989 10916 325 325 2.50% 2.98%
B 12989 10916 122 122 0.94% 1.12%
C 12989 10916 139 139 1.07% 1.27%
D 12989 10916 729 729 5.61% 6.68%

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 4 175 926719 3218.87 1187 1162 287.5
A 12 3 800663 2780.47 1187 1162 287.5
A 12 250 549601 1907.34 1187 1162 287.5
B 10 41 314902 1248.43 1181 1139 251.3
B 4 174 190549 753.64 1181 1139 251.3
B 0 171 182805 722.83 1181 1139 251.3
C 15 189 357269 1102.17 1176 1166 323.1
C 13 3 281023 866.19 1176 1166 323.1
C 14 245 121661 372.94 1176 1166 323.1
D 8 176 2281038 7275.21 1135 1097 313.4
D 7 222 307301 977.09 1135 1097 313.4
D 12 6 235066 746.59 1135 1097 313.4

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