ASTROSAT CZTI

Data Quality Report

Orbit 51242

Creation date: 2025-03-20T09:00:08.850883
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/AS1C07_001T01_9000006454_51242cztM0_level2.fits modeM0/AS1C07_001T01_9000006454_51242cztM0_level2_quad_clean.evt
Size (bytes)1,851,209,280250,447,680
Size1.7 GB 238.8 MB
Events in quadrant A13,156,6901,677,878
Events in quadrant B10,752,9181,865,560
Events in quadrant C22,822,0641,363,040
Events in quadrant D20,316,0211,354,312

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0521122
B0452492
C0811172
D0737852

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03860
B03860
C03860
D03860

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A191738814.595003%
B191735993.124185%
C19173387720.221144%
D19173290615.156731%

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 20153 19175 412 412 2.04% 2.15%
B 20153 19175 208 208 1.03% 1.08%
C 20153 19175 3326 3326 16.50% 17.35%
D 20153 19175 2617 2617 12.99% 13.65%

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 1649867 3368.43 1992 1944 489.2
A 12 250 1046054 2134.21 1992 1944 489.2
A 9 160 604604 1231.87 1992 1944 489.2
B 7 252 772559 1831.19 1995 1924 420.8
B 4 171 347125 820.27 1995 1924 420.8
B 8 234 184693 434.3 1995 1924 420.8
C 4 12 9888711 19985.19 1809 1795 494.7
C 0 209 1375518 2776.81 1809 1795 494.7
C 4 13 1046223 2111.18 1809 1795 494.7
D 7 60 3204287 6226.71 1834 1771 514.3
D 2 62 1933418 3755.74 1834 1771 514.3
D 6 42 1514021 2940.29 1834 1771 514.3

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