ASTROSAT CZTI

Data Quality Report

Orbit 57591

Creation date: 2026-05-25T14:43:38.436197
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/AS1A14_070T08_9000006576_57591cztM0_level2.fits modeM0/AS1A14_070T08_9000006576_57591cztM0_level2_quad_clean.evt
Size (bytes)1,319,693,760217,393,920
Size1.2 GB 207.3 MB
Events in quadrant A9,926,5701,363,206
Events in quadrant B10,036,8351,486,508
Events in quadrant C11,905,0421,386,329
Events in quadrant D15,514,6871,038,521

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A043776451
B043722310
C049474411
D059586546

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0170
D0170

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03864
B03862
C03860
D03862

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A189493802.005383%
B189785212.745284%
C189536703.535060%
D18945217011.454210%

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 20955 19310 229 229 1.09% 1.19%
B 20950 19311 253 253 1.21% 1.31%
C 20957 19317 448 448 2.14% 2.32%
D 20974 19229 1913 1913 9.12% 9.95%

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 4 249 1591430 3173.15 2037 1984 500.9
A 10 251 141737 279.0 2037 1984 500.9
A 3 128 119546 234.7 2037 1984 500.9
B 2 249 1238315 2924.72 2010 1936 422.7
B 0 63 148100 345.76 2010 1936 422.7
B 0 245 133456 311.12 2010 1936 422.7
C 15 224 3589536 6778.88 1955 1930 529.2
C 15 198 236279 442.81 1955 1930 529.2
C 14 254 197055 368.69 1955 1930 529.2
D 15 142 3881903 7358.44 1857 1769 527.3
D 15 94 1957178 3708.31 1857 1769 527.3
D 2 249 342577 646.32 1857 1769 527.3

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