ASTROSAT CZTI

Data Quality Report

Orbit 50879

Creation date: 2025-02-23T11:55:28.019753
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_9000006450_50879cztM0_level2.fits modeM0/AS1C07_001T01_9000006450_50879cztM0_level2_quad_clean.evt
Size (bytes)1,708,332,480266,474,880
Size1.6 GB 254.1 MB
Events in quadrant A14,445,9631,795,427
Events in quadrant B10,027,8662,000,076
Events in quadrant C20,760,5861,348,937
Events in quadrant D16,441,9941,532,219

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04060
B04060
C04060
D04060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0566973
B0443363
C0756773
D0632573

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A201977973.946131%
B201983471.717992%
C20198444622.012080%
D2019817168.495891%

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 21347 20200 548 548 2.57% 2.71%
B 21348 20201 77 77 0.36% 0.38%
C 21348 20201 2722 2722 12.75% 13.47%
D 21348 20201 1424 1424 6.67% 7.05%

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 4 1191344 2242.26 2136 2076 530.4
A 4 249 884876 1664.45 2136 2076 530.4
A 7 206 724150 1361.41 2136 2076 530.4
B 4 81 277183 600.57 2147 2065 458.1
B 4 170 218243 471.91 2147 2065 458.1
B 4 206 177835 383.7 2147 2065 458.1
C 4 210 4850043 9272.96 1885 1864 522.8
C 1 29 1710056 3267.2 1885 1864 522.8
C 13 3 1180978 2255.25 1885 1864 522.8
D 2 216 1447716 2576.77 2018 1950 561.1
D 2 249 1308167 2328.05 2018 1950 561.1
D 15 185 1241737 2209.66 2018 1950 561.1

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