ASTROSAT CZTI

Data Quality Report

Orbit 58871

Creation date: 2026-08-15T09:53:25.285952
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_004T07_9000006598_58871cztM0_level2.fits modeM0/AS1A14_004T07_9000006598_58871cztM0_level2_quad_clean.evt
Size (bytes)2,016,322,560237,360,960
Size1.9 GB 226.4 MB
Events in quadrant A13,470,3071,707,861
Events in quadrant B22,599,0261,442,635
Events in quadrant C18,993,4821,386,487
Events in quadrant D18,167,9301,390,564

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A052735126
B079937385
C069898322
D06665677

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03700
B03700
C03700
D03700

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A182638844.840388%
B18241503027.575243%
C18243354819.448556%
D18279267114.612397%

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 43715 18297 631 631 1.44% 3.45%
B 43716 18278 3985 3985 9.12% 21.80%
C 43714 18286 3408 3408 7.80% 18.64%
D 43715 18303 2445 2445 5.59% 13.36%

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 14 238 1953502 3966.22 1994 1943 492.0
A 15 233 1543334 3132.62 1994 1943 492.0
A 3 14 845704 1714.81 1994 1943 492.0
B 5 172 10036597 25686.04 1835 1768 390.7
B 2 249 2639920 6752.85 1835 1768 390.7
B 5 185 1408804 3601.57 1835 1768 390.7
C 9 38 10372322 21673.47 1739 1721 478.5
C 12 249 430751 896.63 1739 1721 478.5
C 6 223 335979 698.56 1739 1721 478.5
D 12 110 7747417 14397.89 1886 1805 538.0
D 11 129 1912801 3552.25 1886 1805 538.0
D 7 222 249351 460.15 1886 1805 538.0

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

TCT plots

Parameter TCT0 TCT_healed
Tct