ASTROSAT CZTI

Data Quality Report

Orbit 27091

Creation date: 2024-06-27T19:36:24.364592
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/AS1T03_231T01_9000003910_27091cztM0_level2.evt modeM0/AS1T03_231T01_9000003910_27091cztM0_level2_quad_clean.evt
Size (bytes)1,474,424,640237,553,920
Size1.4 GB 226.5 MB
Events in quadrant A9,681,0961,524,676
Events in quadrant B12,048,6771,520,613
Events in quadrant C8,766,2681,484,521
Events in quadrant D12,927,1861,408,602

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0402120
B0475060
C0373370
D0503040

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0200
C0200
D0200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A182233872.123690%
B182245543.039947%
C182242831.552897%
D1822310085.531471%

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 20253 18226 122 122 0.60% 0.67%
B 20254 18227 227 227 1.12% 1.25%
C 20254 18227 6 6 0.03% 0.03%
D 20253 18226 949 949 4.69% 5.21%

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 14 235 974478 2178.56 2223 2176 446.3
A 12 189 110887 243.58 2223 2176 446.3
A 13 254 29179 60.5 2223 2176 446.3
B 0 189 2740686 6512.87 2203 2145 420.5
B 3 112 445217 1053.73 2203 2145 420.5
B 10 245 108230 252.29 2203 2145 420.5
C 14 238 339703 670.42 2147 2163 503.5
C 15 208 40816 76.77 2147 2163 503.5
C 4 224 18329 32.11 2147 2163 503.5
D 1 52 3693260 7214.25 2138 2078 511.7
D 2 250 566258 1102.66 2138 2078 511.7
D 11 176 287808 558.45 2138 2078 511.7

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